In order to explore the mechanism of improving the surface wettability of low-energy polytetrafluoroethylene(PTFE)by new extended surfactants,five kinds of extended anionic surfactants with different numbers of oxypro...In order to explore the mechanism of improving the surface wettability of low-energy polytetrafluoroethylene(PTFE)by new extended surfactants,five kinds of extended anionic surfactants with different numbers of oxypropylene(PO)and oxyethylene(EO),octadecyl-(PO)_(m)-(EO)_(n)-sodium carboxylate(C_(18)PO_(m)EO_(n)C,m=5,10,15,n=5,10,15),were studied.The surface tension and contact angle of C_(18)PO_(m)EO_(n)C solution with different concentrations were measured,and the adhesion tension,PTFE-water interfacial tension,and adhesion work were calculated.It was found that the extended surfactant molecules adsorb on the surface of the solution and the PTFE-liquid interface simultaneously when the concentration is lower than the critical micelle concentration(cmc),and there was a linear relationship between surface tension and adhesion tension.The adsorption amount of C_(18)PO_(m)EO_(n)C at the PTFE-water interface was significantly lower than that on the surface of the solution.As the concentration increases above cmc,semi-micelle aggregates on the surface of PTFE are formed by C_(18)PO_(m)EO_(n)C molecules through hydrophobic interaction,and the hydrophilic group faces the solution to modify the surface of PTFE with high efficiency.展开更多
Fluorosurfactants play a crucial role in ensuring the stability and uniformity of droplet microreactors,which significantly broaden their applications in chemical and biological research.This review covers structure d...Fluorosurfactants play a crucial role in ensuring the stability and uniformity of droplet microreactors,which significantly broaden their applications in chemical and biological research.This review covers structure diversity and functional versatility of fluorosurfactants.Fluorosurfactants can be divided into two basic types according to their structure,linear and dendritic types,which both provides individual advantages.Linear fluorosurfactants are easily synthesized and commercially available,whereas dendritic fluorosurfactants have a branched structure that greatly reduces molecular cross-talk between droplets.Based on the application point of view,fluorosurfactants can be further classified into two categories:reactive and responsive fluorosurfactants.The hydrophilic head of reactive fluorosurfactants contains a reactive functional group,making them very useful in other applications,such as microcapsule preparation or protein crystallization.In contrast,responsive fluorosurfactants would change their properties with respect to external stimuli,such as temperature or light,making them perfect candidates for the on-demand control of droplet behavior.Development of these new classes of fluorosurfactants has expanded the capabilities and applications of droplet microreactors that enables interdisciplinary challenges to be solved.展开更多
The overuse of surfactants has made them well-known environmental pollutants.So far,it is still a challenge to simultaneously distinguish cationic,anionic,zwitterionic,nonionic surfactants and surfactants with similar...The overuse of surfactants has made them well-known environmental pollutants.So far,it is still a challenge to simultaneously distinguish cationic,anionic,zwitterionic,nonionic surfactants and surfactants with similar structures based on traditional analytical techniques.We developed a high-throughput method for distinguishing various surfactants based on the adaptive emission profile as fingerprints(AEPF).The fluorescence response of the sensor was based on the interaction between surfactants and 1,3-diacetylpyrene(o-DAP)probe.The interaction affected the reversible conversion of free molecules and two aggregates in the solution,thereby changing the relative abundance and the fluorescence intensity ratio of two aggregates emitting different fluorescence.The o-DAP sensor can distinguish four types of surfactants(16 surfactants),especially surfactants of the same type with similar structures.The o-DAP sensor sensitively determined the critical micelle concentration(CMC)of 16 surfactants based on the interaction between o-DAP and surfactants.Additionally,the o-DAP sensor can detect and distinguish artificial vesicles made from different surfactants.展开更多
This paper summarizes the mechanisms and environmental effects of interactions between microplastics and surfactants: surfactants adsorb onto microplastics surfaces through hydrophobic interactions and electrostatic f...This paper summarizes the mechanisms and environmental effects of interactions between microplastics and surfactants: surfactants adsorb onto microplastics surfaces through hydrophobic interactions and electrostatic forces, changing their surface properties and transport behavior. In addition, microplastics act as carriers influencing surfactant distribution. Environmental factors (pH, ionic strength, etc. ) significantly regulate this process. Current research still has limitations in areas such as desorption kinetics and combined pollution effects, necessitating in-depth studies under environmentally relevant conditions to provide a basis for risk assessment.展开更多
By investigating the performance characteristics of the bio-based surfactant 8901A,a composite decontamination and injection system was developed using 8901A as the primary agent,tailored for application in low-permea...By investigating the performance characteristics of the bio-based surfactant 8901A,a composite decontamination and injection system was developed using 8901A as the primary agent,tailored for application in low-permeability and heavy oil reservoirs under varying temperature conditions.The results demonstrate that this system effectively reduces oil–water interfacial tension,achieving an ultra-low interfacial tension state.The static oil washing efficiency of oil sands exceeds 85%,the average pressure reduction rate reaches 21.55%,and the oil recovery rate improves by 13.54%.These enhancements significantly increase the system’s ability to dissolve oilbased blockages,thereby lowering water injection pressure caused by organic fouling,increasing the injection volume of injection wells,and ultimately improving oil recovery efficiency.展开更多
During oil displacement,surfactants often encounter challenges such as emulsion instability and channeling,which can compromise their efficiency.To address these issues,polymer microspheres were synthesized via revers...During oil displacement,surfactants often encounter challenges such as emulsion instability and channeling,which can compromise their efficiency.To address these issues,polymer microspheres were synthesized via reverse microemulsion polymerization using acrylamide,2-methyl-2-acrylamidopropane sulfonic acid,and stearyl methacrylate as monomers,with N,N-methylenebisacrylamide as the crosslinker.The microspheres were then combined with sodium alkyl alcohol polyoxyethylene ether carboxylate to enhance emulsion stability and expand the swept volume of surfactant.A stable reverse microemulsion system was prepared using the maximum water solubilization rate as the indicator,and microspheres were synthesized based on this system.The ability of the microspheres to enhance emulsion stability was systematically evaluated.The plugging performance and enhanced oil recovery(EOR)efficiency of the microsphere/surfactant composite system were assessed through core seepage and oil displacement experiments.The experimental results demonstrated that microspheres were successfully prepared in a water-in-oil reverse microemulsion system with a solubilization rate of 42%.The emulsion stability was evaluated under an oil-to-water ratio of 7:3,a temperature of 80℃,and a salinity of 44,592 mg/L,by manually shaking the test tube five times.It was observed that the complete phase separation time of the emulsion increased from 10 to 120 min after the addition of microspheres.Under different permeability conditions(100×10^(-3),300×10^(-3),500×10^(-3)μm^(2)),the recovery efficiency of the composite system increased by 4.5%,8.3%,and 4.8%,respectively,compared to a single surfactant system.The microspheres developed in this study enhanced emulsion stability and increased the swept volume of surfactant within the formation,significantly boosting its oil recovery efficiency.展开更多
While newer,more efficient Lithium-ion batteries(LIBs)and extinguishing agents have been developed to reduce the occurrence of thermal runaway accidents,there is still a scarcity of research focused on the application...While newer,more efficient Lithium-ion batteries(LIBs)and extinguishing agents have been developed to reduce the occurrence of thermal runaway accidents,there is still a scarcity of research focused on the application of surfactants in different LIBs extinguishing agents,particularly in terms of patented technologies.The aim of this review paper is to provide an overview of the technological progress of LIBs and LIBs extinguishing agents in terms of patents in Korea,Japan,Europe,the United States,China,etc.The initial part of this review paper is sort out LIBs technology development in different regions.In addition,to compare LIBs extinguishing agent progress and challenges of liquid,solid,combination of multiple,and microencapsulated.The subsequent section of this review focuses on an in-depth analysis dedicated to the efficiency and challenges faced by the surfactants corresponding design principles of LIBs extinguishing agents,such as nonionic and anionic surfactants.A total of 451,760 LIBs-related patent and 20 LIBs-fire-extinguishing agent-related patent were included in the analyses.The extinguishing effect,cooling performance,and anti-recombustion on different agents have been highlighted.After a comprehensive comparison of these agents,this review suggests that temperature-sensitive hydrogel extinguishing agent is ideal for the effective control of LIBs fire.The progress and challenges of surfactants have been extensively examined,focusing on key factors such as surface activity,thermal stability,foaming properties,environmental friendliness,and electrical conductivity.Moreover,it is crucial to emphasize that the selection of a suitable surfactant must align with the extinguishing strategy of the extinguishing agent for optimal firefighting effectiveness.展开更多
A series of spontaneous imbibition(SI)tests of tight oil were performed,together with oil distribution scans by computed tomography(CT)and nuclear magnetic resonance(NMR).Thus,the best surfactants to optimize the SI e...A series of spontaneous imbibition(SI)tests of tight oil were performed,together with oil distribution scans by computed tomography(CT)and nuclear magnetic resonance(NMR).Thus,the best surfactants to optimize the SI effect were obtained,the basic requirements to surfactants for efficient SI were determined,and the oil mobilization by SI revealed.The results show that anionic surfactants significantly outperform non-ionic,cationic,and zwitterionic ones in SI process.Excellent systems can be further obtained by mixing anionic surfactants with others(e.g.1:1 mixtures of AES:EHSB).The requirements to interfacial properties of surfactants for achieving efficient SI at permeabilities of 0.05,0.5,and 5.0 mD are as follows:10~0 mN/m,<40°;10-1-10~0 mN/m,<55°;and 10-1-10~0 mN/m,<70°,respectively.Although a high oil recovery of 38.5%by SI was achieved in small cylindrical cores(φ2.5 cm×3.0 cm),the joint SI and CT tests in larger,cube-shaped cores(5.0 cm×5.0 cm×5.0 cm)showed that the SI process could only remove the oil from the outermost few millimeters of the cores with permeabilities of 0.05 and 0.1 mD,indicating the great difficulty encountered for their development.The NMR showed that the SI treatment preferentially removed oil from smaller pores rather than medium or large pores.展开更多
The viscoelastic micelle systems formed by novel anionic-nonionic dimeric surfactant and conventional cationic surfactant cetyltrimethylammonium(1631) were studied.The viscoelasticity,thixotropy,flow curves and consti...The viscoelastic micelle systems formed by novel anionic-nonionic dimeric surfactant and conventional cationic surfactant cetyltrimethylammonium(1631) were studied.The viscoelasticity,thixotropy,flow curves and constitutive equation for the novel viscoelastic micelle systems were investigated.The results show that the micelle systems possess viscoelasticity,thixotropy,and shear thinning property.Some micelle systems possess hysteresis loops showing both viscoelasticity and thixotropy.It is proved that the flow curves are characterized by the co-rotational Jeffreys constitutive equation correctly.展开更多
Rosin,a renewable and abundant resource,has been extensively processed and chemically modified to endow it with special properties,especially in the surfactant industry.In this study,four rosin-based quaternary ammoni...Rosin,a renewable and abundant resource,has been extensively processed and chemically modified to endow it with special properties,especially in the surfactant industry.In this study,four rosin-based quaternary ammonium asymmetric gemini surfactants(RGS-2-n)with different alkyl chain lengths(n=12,14,16,18)were synthesized using a simple two-step method based on dehydroabietylamine as the raw material.The feasibility of these surfactants for cleaning purposes was comprehensively evaluated,suggesting that the surfactants own high surface activity and good cleaning performance.Furthermore,by successfully introducing the amine group of dehydroabietylamine into the hydrophilic group of the surfactants,we avoided its potential harm to the environment and water pollution.Density functional theory proves rosin-based gemini surfactants with asymmetric structure can further improve cleaning efficiency.Overall,our findings suggests that RGS-2-n surfactants are promising and sustainable candidates for cleaning electric plates,and provide new opportunities for rosin application in the electric industry.展开更多
Surfactants are extensively employed in the cold production of heavy oil.However,producing heavy oil emulsions using conventional surfactants poses a challenge to spontaneous demulsification,necessitating the addition...Surfactants are extensively employed in the cold production of heavy oil.However,producing heavy oil emulsions using conventional surfactants poses a challenge to spontaneous demulsification,necessitating the addition of demulsifiers for oil-water separation.This inevitably increases the exploitation cost and environmental pollution risk.Switchable surfactants have garnered much attention due to their dual capabilities of underground heavy oil emulsification and surface demulsification.This study focuses on the fundamental working principles and classification of novel switchable surfactants for oil displacement developed in recent years.It offers a comprehensive overview of the latest advances in the applications of switchable surfactants in the fields of enhanced oil recovery(EOR),oil sand washing,and oil-water separation.Furthermore,it highlights the existing challenges and future development directions of switchable surfactants for heavy oil recovery.展开更多
The conservation of rheological and filtration properties of drilling fluids is essential during drilling operations.However,high-pressure and high-temperature conditions may affect drilling fluid additives,leading to...The conservation of rheological and filtration properties of drilling fluids is essential during drilling operations.However,high-pressure and high-temperature conditions may affect drilling fluid additives,leading to their degradation and reduced performance during operation.Hence,the main objective of this study is to formulate and evaluate a viscoelastic surfactant(VES)to design water-based drilling nanofluids(DNF).Silica nanomaterials are also incorporated into fluids to improve their main functional characteristics under harsh conditions.The investigation included:i)synthesis and characterization of VES through zeta potential,thermogravimetric analysis(TGA),Fourier transform infrared spectroscopy(FTIR),atomic force microscopy(AFM),and rheological behavior;ii)the effect of the presence of VES combined with silica nanoparticles on the rheological,filtration,thermal,and structural properties by steady and dynamic shear rheological,filter press,thermal aging assays,and SEM(SEM)assays,respectively;and iii)evaluation of filtration properties at the pore scale through a microfluidic approach.The rheological results showed that water-based muds(WBMs)in the presence of VES exhibited shearthinning and viscoelastic behavior slightly higher than that of WBMs with xanthan gum(XGD).Furthermore,the filtration and thermal properties of the drilling fluid improved in the presence of VES and silica nanoparticles at 0.1 wt%.Compared to the WBMs based on XGD,the 30-min filtrate volume for DNF was reduced by 75%.Moreover,the Herschel-Bulkley model was employed to represent the rheological behavior of fluids with an R2of approximately 0.99.According to SEM,laminar and spherical microstructures were observed for the WBMs based on VES and XGD,respectively.A uniform distribution of the nanoparticles was observed in the WBMs.The results obtained from microfluidic experiments indicated low dynamic filtration for fluids containing VES and silica nanoparticles.Specifically,the filtrate volume of fluids containing VES and VES with silica nanoparticles at 281 min was 0.35 and 0.04 m L,respectively.The differences in the rheological,filtration,thermal,and structural results were mainly associated with the morphological structure of VES or XGD and surface interactions with other WBMs additives.展开更多
In order to solve the problem of limited makeup removal ability of a single surfactant of Peg-20 glyceryl triisostearate in makeup remover,an efficient system was prepared which contained PEG-20 glyceryl triisostearat...In order to solve the problem of limited makeup removal ability of a single surfactant of Peg-20 glyceryl triisostearate in makeup remover,an efficient system was prepared which contained PEG-20 glyceryl triisostearate and a combination of Sorbeth-30 tetraoleate and Peg-5 glyceryl triisostearate.Leather test,skin colorimeter test and consumer self-evaluation were used to assess the makeup removal ability,rinsing performance and softness skin feel of the efficient makeup remover base.The results showed that a 7%combination of Sorbeth-30 tetraoleate and PEG-5 glyceryl triisostearate could significantly improve the comprehensive performance of single PEG-20 glyceryl triisostearate makeup remover system,furthermore,they performed best at the ratio of 6:1.We hope the findings can have guiding significance for the development of makeup remover products.展开更多
Background Persistent pulmonary hypertension(PPHN)of the newborn is one of the major contributors to neonatal mortality.Current conventional treatments for PPHN primarily encompass mechanical ventilation,inhaled nitri...Background Persistent pulmonary hypertension(PPHN)of the newborn is one of the major contributors to neonatal mortality.Current conventional treatments for PPHN primarily encompass mechanical ventilation,inhaled nitric oxide(iNO),sildenafil,and magnesium sulfate.In confirmed cases of neonatal respiratory distress syndrome,pulmonary surfactant(PS)can be considered as a potential treatment option;However,the optimal dosage and administration frequency of PS remain subjects of ongoing debate.This study aimed to assess the efficacy of early repeated endotracheal PS administration combined with iNO therapy in the management of newborns with PPHN.Methods Twenty-three neonates with PPHN received iNO alongside foundational treatments,including anti-infection therapy,mechanical ventilation,acidosis correction,and blood pressure stabilization.The observation group(n=13)received endotracheal instillation of PS three times,with each administration spaced six hours apart;The control group(n=10)received endotracheal instillation of PS once.Parameters compared included blood gas indices,oxygenation index(OI),alveolar-arterial oxygen partial pressure difference(PA-aDO,),pulmonary artery systolic pressure(PAP),and N-terminal pro-brain natriuretic peptide(NT-pro-BNP).Mechanical ventilation duration,oxygen therapy time,hospitalization length,and survival outcomes were recorded and compared between groups.Results The blood gas parameters,OI,and PA-aDO,showed no significant differences between the two groups of children before treatment(P>0.05).By 24-hour post-treatment,both groups exhibited significant increases in partial pressure of oxygen(PaO,)and potential of hydrogen(PH)levels,alongside significant decreases in lactate,partial pressure of carbon dioxide(PaCO,),OI,and PA-aDO2,with statistically significant differences(P<0.05).By 48-hour post-treatment,the observation group demonstrated significantly better improvements in blood gas parameters,OI,and PA-aDO,compared to the control group,and these differences were statistically significant(P<0.05).There was no statistically significant difference in PAP and NT-pro-BNP levels between the two groups before treatment(P>0.05).After treatment,both groups showed significant decreases in PAP and NT-pro-BNP levels(P<0.05),with a more pronounced reduction observed in the observation group(P<0.05).The observation group had significantly shorter durations of mechanical ventilation and oxygen therapy compared to the control group,with statistically significant differences(P<0.05).Additionally,the observation group exhibited a shorter total hospital stay and a lower mortality rate than the control group,though these differences were not statistically significant(P>0.05).Conclusions Early consecutive multiple doses of PS combined with iNO,compared to a single dose,better improves respiratory function indices,maintains stability,reduces pulmonary artery pressure,enhances cardiac function,shortens ventilator dependency,and increases cure rates in PPHN neonates.This approach is particularly suitable for severe PPHN cases,especially those with underlying pulmonary conditions.展开更多
Objective Recent studies have overturned the traditional concept of the lung as a “sterile organ” revealing that pulmonary microbiota dysbiosis and abnormal surfactant proteins(SPs) expression are involved in the pr...Objective Recent studies have overturned the traditional concept of the lung as a “sterile organ” revealing that pulmonary microbiota dysbiosis and abnormal surfactant proteins(SPs) expression are involved in the progression of silicosis. This study aimed to investigate the relationship between abnormal SPs expression and dysbiosis of lung microbiota in silica-induced lung fibrosis, providing insights into mechanisms of silicosis.Methods Lung pathology, SPs expression, and microbiota composition were evaluated in silicaexposed mice. A mouse model of antibiotic-induced microbiota depletion was established, and alveolar structure and SPs expression were assessed. The roles of the lung microbiota and SPs in silicosis progression were further evaluated in mice with antibiotic-induced microbiota depletion, both with and without silica exposure.Results Silica exposure induced lung inflammation and fibrosis, along with increased expression of SPA expression. Antibiotics(Abx)-induced microbiota depletion elevated SP-A and SP-D expression.Furthermore, silica exposure altered lung microbiota composition, enriching potentially pathogenic taxa.However, antibiotic-induced microbiota depletion prior to silica exposure reduced silica-mediated lung fibrosis and inflammation.Conclusion Lung microbiota is associated with silica-induced lung injury. Overproduction of SP-A and SP-D, induced by Abx-induced microbiota depletion, may enhance the resistance of mouse lung tissue to silica-induced injury.展开更多
Using sodium laureth sulfate(AES)as reference,the effects of different pH values on the foam properties of four amino acid surfactants(sodium lauroyl sarcosinate,lauroyl alanine,disodium cocoyl glutamate,sodium methyl...Using sodium laureth sulfate(AES)as reference,the effects of different pH values on the foam properties of four amino acid surfactants(sodium lauroyl sarcosinate,lauroyl alanine,disodium cocoyl glutamate,sodium methyl cocoyl taurate)were compared.On the basis,the effects of amino acid surfactants on foam performance,flocculation behavior,hair color protection efficacy and sebum removal capacity were studied when AES was completely or partially replaced by amino acid surfactant,and the correlation between the structure of amino acid surfactant and these properties was discussed.Compared with AES,the foam performance of sodium lauroyl sarcosinate,lauroyl alanine and disodium cocoyl glutamate were significantly affected by pH value,and sodium methyl cocoyl taurate was less affected.The foam stability of shampoo system can be enhanced by the combination of amino acid surfactant,and the foam performance of shampoo system can be significantly improved by the combination of sodium methyl cocoyl taurate.All the four amino acid surfactants can prolong the flocculation time of shampoo,and the effect of disodium cocoyl glutamate was the most obvious.The hair color protection efficacy of disodium cocoyl glutamate and sodium methyl cocoyl taurate were better than AES.The degreasing power of disodium cocoyl glutamate was weaker than that of AES,and the degreasing power of sodium lauroyl sarcosinate,lauroyl alanine and sodium methyl cocoyl taurate were stronger than that of AES.展开更多
From April 21st to 23rd,the 2025 China Surfactant Industry Conference was successfully held in Hangzhou.The conference was hosted by China Research Institute of Daily Chemical,and the National Engineering Research Cen...From April 21st to 23rd,the 2025 China Surfactant Industry Conference was successfully held in Hangzhou.The conference was hosted by China Research Institute of Daily Chemical,and the National Engineering Research Center for Surfactant,undertaken by the National Productivity Promotion Center for Surfactant and Detergent Industry and the China Daily Chemical Industry Information Center,specially co-organized by Zanyu Technology Group Co.,Ltd,and jointly co-organized by the China Surface Active Agent Industry Alliance (SAA),the Malaysian Palm Oil Board (MPOB),the Roundtable on Sustainable Palm Oil (RSPO),and the American Oil Chemists’ Society (AOCS).展开更多
The photochemical conversion of SO_(2) to sulfates on 4-(benzoyl)benzoic acid(4-BBA)was investigated deeply in the presence of anionic and cationic surfactants.The types of surfactants determined their effect behavior...The photochemical conversion of SO_(2) to sulfates on 4-(benzoyl)benzoic acid(4-BBA)was investigated deeply in the presence of anionic and cationic surfactants.The types of surfactants determined their effect behaviors,and cationic surfactants can significantly enhance the SO_(2) oxidation on 4-BBA under irradiation,as shown by larger SO_(2) uptake coefficients and sulfate production.Hydrophilic moieties in cationic surfactants have a greater enhancement effect on the photochemical conversion of SO_(2) to sulfates than the corresponding hydrophobic moieties.Cationic surfactants obviously increased the accumulation of H_(2)O on the surface,which was proved to be the main factor influencing the SO_(2) uptake and the sulfate formation on 4-BBA.SO_(2) lifetime and sulfate formation rate in the mixture system of photosensitive substances with surfactants were evaluated to be 2.25 days and 0.09μg/(m^(3)·h),respectively.展开更多
From April 21 to 23,2025,the “2025 China Surfactant Industry Alliance(SAA)” was successfully held in Hangzhou,sponsored by the China Research Institute of Daily Chemical and the National Engineering Research Center ...From April 21 to 23,2025,the “2025 China Surfactant Industry Alliance(SAA)” was successfully held in Hangzhou,sponsored by the China Research Institute of Daily Chemical and the National Engineering Research Center for Surfactants,undertaken by the Productivity Promotion Center of the Surfactant and Detergent Industry and the China National Daily Chemical Industry Information Center,specially assisted by Zanyu Technology Group Co.,Ltd.,and co organized by the China Surfactant Industry Alliance(SAA),the Malaysian Palm Oil Board(MPOB),the Roundtable on Sustainable Palm Oil(RSPO),and the American Oil Chemists' Society(AOCS).展开更多
In modern engineering,enhancing boiling heat transfer efficiency is crucial for optimizing energy use and several industrial processes involving different types of materials.This study explores the enhancement of pool...In modern engineering,enhancing boiling heat transfer efficiency is crucial for optimizing energy use and several industrial processes involving different types of materials.This study explores the enhancement of pool boiling heat transfer potentially induced by combining perforated copper particles on a heated surface with a sodium dodecyl sulfate(SDS)surfactant in saturated deionized water.Experiments were conducted at standard atmospheric pressure,with heat flux ranging from 20 to 100 kW/m2.The heating surface,positioned below the layer of freely moving copper beads,allowed the particle layer to shift due to liquid convection and steam nucleation.The study reports on the influence of copper bead diameter(2,3,4,and 5 mm),particle quantity,arrangement,and SDS concentration(20,200,and 500 ppm).It is shown that the combination of 5 mm particles and a 500 ppm SDS concentration can yield a remarkable 139%improvement in heat transfer efficiency.As demonstrated by direct flow visualization,bubble formation occurs primarily in the gaps between the particles and the heated surface,with the presence of SDS reducing bubble size and accelerating bubble detachment.展开更多
文摘In order to explore the mechanism of improving the surface wettability of low-energy polytetrafluoroethylene(PTFE)by new extended surfactants,five kinds of extended anionic surfactants with different numbers of oxypropylene(PO)and oxyethylene(EO),octadecyl-(PO)_(m)-(EO)_(n)-sodium carboxylate(C_(18)PO_(m)EO_(n)C,m=5,10,15,n=5,10,15),were studied.The surface tension and contact angle of C_(18)PO_(m)EO_(n)C solution with different concentrations were measured,and the adhesion tension,PTFE-water interfacial tension,and adhesion work were calculated.It was found that the extended surfactant molecules adsorb on the surface of the solution and the PTFE-liquid interface simultaneously when the concentration is lower than the critical micelle concentration(cmc),and there was a linear relationship between surface tension and adhesion tension.The adsorption amount of C_(18)PO_(m)EO_(n)C at the PTFE-water interface was significantly lower than that on the surface of the solution.As the concentration increases above cmc,semi-micelle aggregates on the surface of PTFE are formed by C_(18)PO_(m)EO_(n)C molecules through hydrophobic interaction,and the hydrophilic group faces the solution to modify the surface of PTFE with high efficiency.
基金support of the National Key Research and Development Program of China(2021YFC2104300)the National Natural Science Foundation of China(T2322011,22308146,22278214)the support of the State Key Laboratory of Materials-Oriented Chemical Engineering(SKL-MCE-22A06,KL20-02).
文摘Fluorosurfactants play a crucial role in ensuring the stability and uniformity of droplet microreactors,which significantly broaden their applications in chemical and biological research.This review covers structure diversity and functional versatility of fluorosurfactants.Fluorosurfactants can be divided into two basic types according to their structure,linear and dendritic types,which both provides individual advantages.Linear fluorosurfactants are easily synthesized and commercially available,whereas dendritic fluorosurfactants have a branched structure that greatly reduces molecular cross-talk between droplets.Based on the application point of view,fluorosurfactants can be further classified into two categories:reactive and responsive fluorosurfactants.The hydrophilic head of reactive fluorosurfactants contains a reactive functional group,making them very useful in other applications,such as microcapsule preparation or protein crystallization.In contrast,responsive fluorosurfactants would change their properties with respect to external stimuli,such as temperature or light,making them perfect candidates for the on-demand control of droplet behavior.Development of these new classes of fluorosurfactants has expanded the capabilities and applications of droplet microreactors that enables interdisciplinary challenges to be solved.
基金supported by the National Natural Science Foundation of China(Nos.22225806,22078314,22278394,22378385)Dalian Institute of Chemical Physics(Nos.DICPI202142,DICPI202436).
文摘The overuse of surfactants has made them well-known environmental pollutants.So far,it is still a challenge to simultaneously distinguish cationic,anionic,zwitterionic,nonionic surfactants and surfactants with similar structures based on traditional analytical techniques.We developed a high-throughput method for distinguishing various surfactants based on the adaptive emission profile as fingerprints(AEPF).The fluorescence response of the sensor was based on the interaction between surfactants and 1,3-diacetylpyrene(o-DAP)probe.The interaction affected the reversible conversion of free molecules and two aggregates in the solution,thereby changing the relative abundance and the fluorescence intensity ratio of two aggregates emitting different fluorescence.The o-DAP sensor can distinguish four types of surfactants(16 surfactants),especially surfactants of the same type with similar structures.The o-DAP sensor sensitively determined the critical micelle concentration(CMC)of 16 surfactants based on the interaction between o-DAP and surfactants.Additionally,the o-DAP sensor can detect and distinguish artificial vesicles made from different surfactants.
基金Supported by Zhaoqing University Innovation and Entrepreneurship Training Program for College Students (X202410580130).
文摘This paper summarizes the mechanisms and environmental effects of interactions between microplastics and surfactants: surfactants adsorb onto microplastics surfaces through hydrophobic interactions and electrostatic forces, changing their surface properties and transport behavior. In addition, microplastics act as carriers influencing surfactant distribution. Environmental factors (pH, ionic strength, etc. ) significantly regulate this process. Current research still has limitations in areas such as desorption kinetics and combined pollution effects, necessitating in-depth studies under environmentally relevant conditions to provide a basis for risk assessment.
文摘By investigating the performance characteristics of the bio-based surfactant 8901A,a composite decontamination and injection system was developed using 8901A as the primary agent,tailored for application in low-permeability and heavy oil reservoirs under varying temperature conditions.The results demonstrate that this system effectively reduces oil–water interfacial tension,achieving an ultra-low interfacial tension state.The static oil washing efficiency of oil sands exceeds 85%,the average pressure reduction rate reaches 21.55%,and the oil recovery rate improves by 13.54%.These enhancements significantly increase the system’s ability to dissolve oilbased blockages,thereby lowering water injection pressure caused by organic fouling,increasing the injection volume of injection wells,and ultimately improving oil recovery efficiency.
基金supported by the Natural Science Foundation of Shandong Province(ZR2021ME007)the National Natural Science Foundation in China(51574267)the Key Projects of China National Key Research and Development Plan(2019YFA0708703)。
文摘During oil displacement,surfactants often encounter challenges such as emulsion instability and channeling,which can compromise their efficiency.To address these issues,polymer microspheres were synthesized via reverse microemulsion polymerization using acrylamide,2-methyl-2-acrylamidopropane sulfonic acid,and stearyl methacrylate as monomers,with N,N-methylenebisacrylamide as the crosslinker.The microspheres were then combined with sodium alkyl alcohol polyoxyethylene ether carboxylate to enhance emulsion stability and expand the swept volume of surfactant.A stable reverse microemulsion system was prepared using the maximum water solubilization rate as the indicator,and microspheres were synthesized based on this system.The ability of the microspheres to enhance emulsion stability was systematically evaluated.The plugging performance and enhanced oil recovery(EOR)efficiency of the microsphere/surfactant composite system were assessed through core seepage and oil displacement experiments.The experimental results demonstrated that microspheres were successfully prepared in a water-in-oil reverse microemulsion system with a solubilization rate of 42%.The emulsion stability was evaluated under an oil-to-water ratio of 7:3,a temperature of 80℃,and a salinity of 44,592 mg/L,by manually shaking the test tube five times.It was observed that the complete phase separation time of the emulsion increased from 10 to 120 min after the addition of microspheres.Under different permeability conditions(100×10^(-3),300×10^(-3),500×10^(-3)μm^(2)),the recovery efficiency of the composite system increased by 4.5%,8.3%,and 4.8%,respectively,compared to a single surfactant system.The microspheres developed in this study enhanced emulsion stability and increased the swept volume of surfactant within the formation,significantly boosting its oil recovery efficiency.
基金supported by the National Key Research and Development Program of China (No.2017YFC0804700)the Opening Project of State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology (No.KFJJ23-23M)。
文摘While newer,more efficient Lithium-ion batteries(LIBs)and extinguishing agents have been developed to reduce the occurrence of thermal runaway accidents,there is still a scarcity of research focused on the application of surfactants in different LIBs extinguishing agents,particularly in terms of patented technologies.The aim of this review paper is to provide an overview of the technological progress of LIBs and LIBs extinguishing agents in terms of patents in Korea,Japan,Europe,the United States,China,etc.The initial part of this review paper is sort out LIBs technology development in different regions.In addition,to compare LIBs extinguishing agent progress and challenges of liquid,solid,combination of multiple,and microencapsulated.The subsequent section of this review focuses on an in-depth analysis dedicated to the efficiency and challenges faced by the surfactants corresponding design principles of LIBs extinguishing agents,such as nonionic and anionic surfactants.A total of 451,760 LIBs-related patent and 20 LIBs-fire-extinguishing agent-related patent were included in the analyses.The extinguishing effect,cooling performance,and anti-recombustion on different agents have been highlighted.After a comprehensive comparison of these agents,this review suggests that temperature-sensitive hydrogel extinguishing agent is ideal for the effective control of LIBs fire.The progress and challenges of surfactants have been extensively examined,focusing on key factors such as surface activity,thermal stability,foaming properties,environmental friendliness,and electrical conductivity.Moreover,it is crucial to emphasize that the selection of a suitable surfactant must align with the extinguishing strategy of the extinguishing agent for optimal firefighting effectiveness.
基金the National Natural Science Foundation of China(Grant No.52474071)for their financial support。
文摘A series of spontaneous imbibition(SI)tests of tight oil were performed,together with oil distribution scans by computed tomography(CT)and nuclear magnetic resonance(NMR).Thus,the best surfactants to optimize the SI effect were obtained,the basic requirements to surfactants for efficient SI were determined,and the oil mobilization by SI revealed.The results show that anionic surfactants significantly outperform non-ionic,cationic,and zwitterionic ones in SI process.Excellent systems can be further obtained by mixing anionic surfactants with others(e.g.1:1 mixtures of AES:EHSB).The requirements to interfacial properties of surfactants for achieving efficient SI at permeabilities of 0.05,0.5,and 5.0 mD are as follows:10~0 mN/m,<40°;10-1-10~0 mN/m,<55°;and 10-1-10~0 mN/m,<70°,respectively.Although a high oil recovery of 38.5%by SI was achieved in small cylindrical cores(φ2.5 cm×3.0 cm),the joint SI and CT tests in larger,cube-shaped cores(5.0 cm×5.0 cm×5.0 cm)showed that the SI process could only remove the oil from the outermost few millimeters of the cores with permeabilities of 0.05 and 0.1 mD,indicating the great difficulty encountered for their development.The NMR showed that the SI treatment preferentially removed oil from smaller pores rather than medium or large pores.
基金Project(20276016) supported by the National Natural Science Foundation of China
文摘The viscoelastic micelle systems formed by novel anionic-nonionic dimeric surfactant and conventional cationic surfactant cetyltrimethylammonium(1631) were studied.The viscoelasticity,thixotropy,flow curves and constitutive equation for the novel viscoelastic micelle systems were investigated.The results show that the micelle systems possess viscoelasticity,thixotropy,and shear thinning property.Some micelle systems possess hysteresis loops showing both viscoelasticity and thixotropy.It is proved that the flow curves are characterized by the co-rotational Jeffreys constitutive equation correctly.
基金supported by National Natural Science Foundation of China(U21A200313)Key Program of Qingyuan Innovation Laboratory(00221003)‘111’program of Fuzhou University.
文摘Rosin,a renewable and abundant resource,has been extensively processed and chemically modified to endow it with special properties,especially in the surfactant industry.In this study,four rosin-based quaternary ammonium asymmetric gemini surfactants(RGS-2-n)with different alkyl chain lengths(n=12,14,16,18)were synthesized using a simple two-step method based on dehydroabietylamine as the raw material.The feasibility of these surfactants for cleaning purposes was comprehensively evaluated,suggesting that the surfactants own high surface activity and good cleaning performance.Furthermore,by successfully introducing the amine group of dehydroabietylamine into the hydrophilic group of the surfactants,we avoided its potential harm to the environment and water pollution.Density functional theory proves rosin-based gemini surfactants with asymmetric structure can further improve cleaning efficiency.Overall,our findings suggests that RGS-2-n surfactants are promising and sustainable candidates for cleaning electric plates,and provide new opportunities for rosin application in the electric industry.
基金supported by a key project of the National Natural Science Foundation of China(No 21938003)the Postdoctoral Foundation of the PetroChina Dagang Oilfield Company(No.2023BO59).
文摘Surfactants are extensively employed in the cold production of heavy oil.However,producing heavy oil emulsions using conventional surfactants poses a challenge to spontaneous demulsification,necessitating the addition of demulsifiers for oil-water separation.This inevitably increases the exploitation cost and environmental pollution risk.Switchable surfactants have garnered much attention due to their dual capabilities of underground heavy oil emulsification and surface demulsification.This study focuses on the fundamental working principles and classification of novel switchable surfactants for oil displacement developed in recent years.It offers a comprehensive overview of the latest advances in the applications of switchable surfactants in the fields of enhanced oil recovery(EOR),oil sand washing,and oil-water separation.Furthermore,it highlights the existing challenges and future development directions of switchable surfactants for heavy oil recovery.
基金funded by Fondo Francisco Jose de Caldas,MINCIENCIAS and Agencia Nacional de hidrocarburos(ANH)through contract No.112721-282-2023(Project 1118-1035-9300)with Universidad Nacional de Colombia-Sede Medellin and PAREX RESOURCES COLOMBIA AG SUCURSAL。
文摘The conservation of rheological and filtration properties of drilling fluids is essential during drilling operations.However,high-pressure and high-temperature conditions may affect drilling fluid additives,leading to their degradation and reduced performance during operation.Hence,the main objective of this study is to formulate and evaluate a viscoelastic surfactant(VES)to design water-based drilling nanofluids(DNF).Silica nanomaterials are also incorporated into fluids to improve their main functional characteristics under harsh conditions.The investigation included:i)synthesis and characterization of VES through zeta potential,thermogravimetric analysis(TGA),Fourier transform infrared spectroscopy(FTIR),atomic force microscopy(AFM),and rheological behavior;ii)the effect of the presence of VES combined with silica nanoparticles on the rheological,filtration,thermal,and structural properties by steady and dynamic shear rheological,filter press,thermal aging assays,and SEM(SEM)assays,respectively;and iii)evaluation of filtration properties at the pore scale through a microfluidic approach.The rheological results showed that water-based muds(WBMs)in the presence of VES exhibited shearthinning and viscoelastic behavior slightly higher than that of WBMs with xanthan gum(XGD).Furthermore,the filtration and thermal properties of the drilling fluid improved in the presence of VES and silica nanoparticles at 0.1 wt%.Compared to the WBMs based on XGD,the 30-min filtrate volume for DNF was reduced by 75%.Moreover,the Herschel-Bulkley model was employed to represent the rheological behavior of fluids with an R2of approximately 0.99.According to SEM,laminar and spherical microstructures were observed for the WBMs based on VES and XGD,respectively.A uniform distribution of the nanoparticles was observed in the WBMs.The results obtained from microfluidic experiments indicated low dynamic filtration for fluids containing VES and silica nanoparticles.Specifically,the filtrate volume of fluids containing VES and VES with silica nanoparticles at 281 min was 0.35 and 0.04 m L,respectively.The differences in the rheological,filtration,thermal,and structural results were mainly associated with the morphological structure of VES or XGD and surface interactions with other WBMs additives.
文摘In order to solve the problem of limited makeup removal ability of a single surfactant of Peg-20 glyceryl triisostearate in makeup remover,an efficient system was prepared which contained PEG-20 glyceryl triisostearate and a combination of Sorbeth-30 tetraoleate and Peg-5 glyceryl triisostearate.Leather test,skin colorimeter test and consumer self-evaluation were used to assess the makeup removal ability,rinsing performance and softness skin feel of the efficient makeup remover base.The results showed that a 7%combination of Sorbeth-30 tetraoleate and PEG-5 glyceryl triisostearate could significantly improve the comprehensive performance of single PEG-20 glyceryl triisostearate makeup remover system,furthermore,they performed best at the ratio of 6:1.We hope the findings can have guiding significance for the development of makeup remover products.
文摘Background Persistent pulmonary hypertension(PPHN)of the newborn is one of the major contributors to neonatal mortality.Current conventional treatments for PPHN primarily encompass mechanical ventilation,inhaled nitric oxide(iNO),sildenafil,and magnesium sulfate.In confirmed cases of neonatal respiratory distress syndrome,pulmonary surfactant(PS)can be considered as a potential treatment option;However,the optimal dosage and administration frequency of PS remain subjects of ongoing debate.This study aimed to assess the efficacy of early repeated endotracheal PS administration combined with iNO therapy in the management of newborns with PPHN.Methods Twenty-three neonates with PPHN received iNO alongside foundational treatments,including anti-infection therapy,mechanical ventilation,acidosis correction,and blood pressure stabilization.The observation group(n=13)received endotracheal instillation of PS three times,with each administration spaced six hours apart;The control group(n=10)received endotracheal instillation of PS once.Parameters compared included blood gas indices,oxygenation index(OI),alveolar-arterial oxygen partial pressure difference(PA-aDO,),pulmonary artery systolic pressure(PAP),and N-terminal pro-brain natriuretic peptide(NT-pro-BNP).Mechanical ventilation duration,oxygen therapy time,hospitalization length,and survival outcomes were recorded and compared between groups.Results The blood gas parameters,OI,and PA-aDO,showed no significant differences between the two groups of children before treatment(P>0.05).By 24-hour post-treatment,both groups exhibited significant increases in partial pressure of oxygen(PaO,)and potential of hydrogen(PH)levels,alongside significant decreases in lactate,partial pressure of carbon dioxide(PaCO,),OI,and PA-aDO2,with statistically significant differences(P<0.05).By 48-hour post-treatment,the observation group demonstrated significantly better improvements in blood gas parameters,OI,and PA-aDO,compared to the control group,and these differences were statistically significant(P<0.05).There was no statistically significant difference in PAP and NT-pro-BNP levels between the two groups before treatment(P>0.05).After treatment,both groups showed significant decreases in PAP and NT-pro-BNP levels(P<0.05),with a more pronounced reduction observed in the observation group(P<0.05).The observation group had significantly shorter durations of mechanical ventilation and oxygen therapy compared to the control group,with statistically significant differences(P<0.05).Additionally,the observation group exhibited a shorter total hospital stay and a lower mortality rate than the control group,though these differences were not statistically significant(P>0.05).Conclusions Early consecutive multiple doses of PS combined with iNO,compared to a single dose,better improves respiratory function indices,maintains stability,reduces pulmonary artery pressure,enhances cardiac function,shortens ventilator dependency,and increases cure rates in PPHN neonates.This approach is particularly suitable for severe PPHN cases,especially those with underlying pulmonary conditions.
基金supported by the National Natural Science Foundation of China Joint Fund for Regional Innovation and Development(Grant numbers [U21A20334])the Postgraduate Innovation Funding Project of Hebei Province(Grant numbers [CXZZBS2022116])。
文摘Objective Recent studies have overturned the traditional concept of the lung as a “sterile organ” revealing that pulmonary microbiota dysbiosis and abnormal surfactant proteins(SPs) expression are involved in the progression of silicosis. This study aimed to investigate the relationship between abnormal SPs expression and dysbiosis of lung microbiota in silica-induced lung fibrosis, providing insights into mechanisms of silicosis.Methods Lung pathology, SPs expression, and microbiota composition were evaluated in silicaexposed mice. A mouse model of antibiotic-induced microbiota depletion was established, and alveolar structure and SPs expression were assessed. The roles of the lung microbiota and SPs in silicosis progression were further evaluated in mice with antibiotic-induced microbiota depletion, both with and without silica exposure.Results Silica exposure induced lung inflammation and fibrosis, along with increased expression of SPA expression. Antibiotics(Abx)-induced microbiota depletion elevated SP-A and SP-D expression.Furthermore, silica exposure altered lung microbiota composition, enriching potentially pathogenic taxa.However, antibiotic-induced microbiota depletion prior to silica exposure reduced silica-mediated lung fibrosis and inflammation.Conclusion Lung microbiota is associated with silica-induced lung injury. Overproduction of SP-A and SP-D, induced by Abx-induced microbiota depletion, may enhance the resistance of mouse lung tissue to silica-induced injury.
文摘Using sodium laureth sulfate(AES)as reference,the effects of different pH values on the foam properties of four amino acid surfactants(sodium lauroyl sarcosinate,lauroyl alanine,disodium cocoyl glutamate,sodium methyl cocoyl taurate)were compared.On the basis,the effects of amino acid surfactants on foam performance,flocculation behavior,hair color protection efficacy and sebum removal capacity were studied when AES was completely or partially replaced by amino acid surfactant,and the correlation between the structure of amino acid surfactant and these properties was discussed.Compared with AES,the foam performance of sodium lauroyl sarcosinate,lauroyl alanine and disodium cocoyl glutamate were significantly affected by pH value,and sodium methyl cocoyl taurate was less affected.The foam stability of shampoo system can be enhanced by the combination of amino acid surfactant,and the foam performance of shampoo system can be significantly improved by the combination of sodium methyl cocoyl taurate.All the four amino acid surfactants can prolong the flocculation time of shampoo,and the effect of disodium cocoyl glutamate was the most obvious.The hair color protection efficacy of disodium cocoyl glutamate and sodium methyl cocoyl taurate were better than AES.The degreasing power of disodium cocoyl glutamate was weaker than that of AES,and the degreasing power of sodium lauroyl sarcosinate,lauroyl alanine and sodium methyl cocoyl taurate were stronger than that of AES.
文摘From April 21st to 23rd,the 2025 China Surfactant Industry Conference was successfully held in Hangzhou.The conference was hosted by China Research Institute of Daily Chemical,and the National Engineering Research Center for Surfactant,undertaken by the National Productivity Promotion Center for Surfactant and Detergent Industry and the China Daily Chemical Industry Information Center,specially co-organized by Zanyu Technology Group Co.,Ltd,and jointly co-organized by the China Surface Active Agent Industry Alliance (SAA),the Malaysian Palm Oil Board (MPOB),the Roundtable on Sustainable Palm Oil (RSPO),and the American Oil Chemists’ Society (AOCS).
基金supported by the National Natural Science Foundation of China(Nos.42077198 and 22206023)Liaoning Revitalization Talents Program(No.XLYC1907185)+1 种基金Liaoning Science and Technology Joint Project(No.2023-MSBA-109)the Fundamental Research Funds for the Central Universities(Nos.N2325019 and N2325034).
文摘The photochemical conversion of SO_(2) to sulfates on 4-(benzoyl)benzoic acid(4-BBA)was investigated deeply in the presence of anionic and cationic surfactants.The types of surfactants determined their effect behaviors,and cationic surfactants can significantly enhance the SO_(2) oxidation on 4-BBA under irradiation,as shown by larger SO_(2) uptake coefficients and sulfate production.Hydrophilic moieties in cationic surfactants have a greater enhancement effect on the photochemical conversion of SO_(2) to sulfates than the corresponding hydrophobic moieties.Cationic surfactants obviously increased the accumulation of H_(2)O on the surface,which was proved to be the main factor influencing the SO_(2) uptake and the sulfate formation on 4-BBA.SO_(2) lifetime and sulfate formation rate in the mixture system of photosensitive substances with surfactants were evaluated to be 2.25 days and 0.09μg/(m^(3)·h),respectively.
文摘From April 21 to 23,2025,the “2025 China Surfactant Industry Alliance(SAA)” was successfully held in Hangzhou,sponsored by the China Research Institute of Daily Chemical and the National Engineering Research Center for Surfactants,undertaken by the Productivity Promotion Center of the Surfactant and Detergent Industry and the China National Daily Chemical Industry Information Center,specially assisted by Zanyu Technology Group Co.,Ltd.,and co organized by the China Surfactant Industry Alliance(SAA),the Malaysian Palm Oil Board(MPOB),the Roundtable on Sustainable Palm Oil(RSPO),and the American Oil Chemists' Society(AOCS).
基金supported by the National Natural Science Foundation of China(Project No.52166004)the National Key Research and Development Program of China(Project No.2022YFC3902000)+2 种基金the Major Science and Technology Special Project of Yunnan Province(Project Nos.202202AG050007202202AG050002)the Research on the Development of Complete Sets of Technology for Extraction of Aromatic Substances from Tobacco Waste and Its Application,Applied Research-Pyrolysis Process Technology Research(2023QT01).
文摘In modern engineering,enhancing boiling heat transfer efficiency is crucial for optimizing energy use and several industrial processes involving different types of materials.This study explores the enhancement of pool boiling heat transfer potentially induced by combining perforated copper particles on a heated surface with a sodium dodecyl sulfate(SDS)surfactant in saturated deionized water.Experiments were conducted at standard atmospheric pressure,with heat flux ranging from 20 to 100 kW/m2.The heating surface,positioned below the layer of freely moving copper beads,allowed the particle layer to shift due to liquid convection and steam nucleation.The study reports on the influence of copper bead diameter(2,3,4,and 5 mm),particle quantity,arrangement,and SDS concentration(20,200,and 500 ppm).It is shown that the combination of 5 mm particles and a 500 ppm SDS concentration can yield a remarkable 139%improvement in heat transfer efficiency.As demonstrated by direct flow visualization,bubble formation occurs primarily in the gaps between the particles and the heated surface,with the presence of SDS reducing bubble size and accelerating bubble detachment.
