Changes of dyeing behavior of wool after stretching - setting treatment are studied.Effects of stretching - setting on wool structure are analyzed.It is concluded that stretching - setting treatment not only reduces w...Changes of dyeing behavior of wool after stretching - setting treatment are studied.Effects of stretching - setting on wool structure are analyzed.It is concluded that stretching - setting treatment not only reduces wool diameter and increases wool length,but also brings about low-temperature dyeing of wool.展开更多
The development of pollution-free dyeing technology, including anhydrous dyeing and non-aqueous dyeing technologies, has always been an important way and research hot in energy conservation and emission reduction. Des...The development of pollution-free dyeing technology, including anhydrous dyeing and non-aqueous dyeing technologies, has always been an important way and research hot in energy conservation and emission reduction. Designing new structural dye molecules is the key to water-saving dyeing processes.Herein, three reactive dyes were designed and synthesized, which contained large planar multiconjugated systems and multi-reactive groups. The designed reactive dyes are expected to have high affinity and high fixations in non-aqueous or small bath dyeing processes. The reactive dyes were applied in the decamethylcyclopentasiloxane(DMCS) reverse micelle dyeing for cotton fabric. High exhaustion rate of 99.35%, 98.10% and 98.80%, and fixation rate of 95.15%, 96.34% and 94.40% for three dyes, R1,R2 and R3, could be respectively obtained. The dyes can be fully utilized and had excellent dyeing performance, fastness and levelling properties under the revere micelle dyeing. The cotton fabric is like an oil-water separator in the dyeing process, where the dye micelles rapidly absorb and permeate into the cotton fibers. DMCS circulates around the fabric to transfer mass and energy. After dyeing, the solvent can be separated quickly and reused. The new reactive dyes containing large planar and multi-conjugated systems have potential application in green and sustainable dyeing technology with less wastewater and higher utilization.展开更多
Natural dyestuff of luteolin was isolated and used to dye wool fabric in this paper. Ethanol extraction and high-speed countercurrent chromatography (HSCCC) were used to extract and purify the luteolin from the peanut...Natural dyestuff of luteolin was isolated and used to dye wool fabric in this paper. Ethanol extraction and high-speed countercurrent chromatography (HSCCC) were used to extract and purify the luteolin from the peanut shell, and the structure of the isolated luteolin was characterized with FTIR techniques. The interaction between dyestuff and fiber was preliminarily discussed through thermodynamic study and supramolecular structure simulation to explain the intrinsic reasons why the color fastness was low when luteolin was applied to dyeing wool fabric. The extraction condition and purification parameter were as follows: 65% ethanol, ratio of material to liquid 1:20, 80°C, 3 h, chloroform-methanol-water (4/3/2, V/V), 800 rmp/min, 2.0 Mkpa, 0.5 mL/ min and 280 nm. The results of dyeing thermodynamics showed that the sorption isotherm of luteolin on wool fabric was consistent with Nernst model and similar to the disperse dyestuff. With molecular simulation, luteolin and glycin composed 8 stable complexes whose Laplacian values all were greater than 0, which suggested typical hydrogen bonds existing. The complex with three hydrogen bonds was proved the most stable. Both studies on thermodynamics and supramolecular simulation revealed that luteolin on wool fabric mainly depended on the weak hydrogen bonds interaction that determined the low dyefastness.展开更多
The dyeing temperature of natural dye lac red on two kinds of natural protein fibers was studied, and the interaction between dyestuff and fiber was discussed through thermodynamic study and density functional theory ...The dyeing temperature of natural dye lac red on two kinds of natural protein fibers was studied, and the interaction between dyestuff and fiber was discussed through thermodynamic study and density functional theory (DFT) calculation. The optimum temperature for lac red dyed silk was 60˚C and wool showed a better response at 90˚C. The thermodynamics study revealed good Nernst isotherm and Freundlich adsorption models respectively, and the lac dye adsorption processes were both spontaneous and exothermic. The potential interaction of Laccaic acid A with the external environment by electrostatic potential and atomic charge distribution was first explored. With molecular simulation, Laccaic acid A and glycine composed 8 stable complexes. Then, typical hydrogen bonds, bond length, and binding energy, etc. were analyzed. The results revealed lac red on silk and wool fabric mainly depended on the weak hydrogen bonds and van der Waals force which determined the low dye fastness.展开更多
In this study, the dyeing properties of different fabric species were investigated using root extract of yellow sormunen （Alkanna orientalis）. For this purpose, the cotton and wool fabrics were dyed using the root e...In this study, the dyeing properties of different fabric species were investigated using root extract of yellow sormunen （Alkanna orientalis）. For this purpose, the cotton and wool fabrics were dyed using the root extract of yellow sormunen by pre-mordanting, together-mordanting and last-mordanting methods with copper sulfate （CuSO4）, iron sulfate （FeSO4） and aluminum sulfate （AiK（SO4）2） at medium pH. The same procedure was applied to cotton and wool fabrics that allowed in Artifical Urinary System （AUS） [%3 NH3 ＋ %3 urea ＋ %3 CAC2O4（g/v）] for 24 h. The color codes were determined with Pantone Color Quide, and K/S and L＊ a＊ b＊ values were detected with color measurement spectrophotometer, and also washing-, crocking-fastness levels were evaluated using gray scale. According to the evaluations, the fabrics dyed pre-treated with AUS have higher fastness values than the unpre-treated dyed fabrics with AUS.展开更多
The detection of amino acid enantiomers holds significant importance in biomedical,chemical,food,and other fields.Traditional chiral recognition methods using fluorescent probes primarily rely on fluorescence intensit...The detection of amino acid enantiomers holds significant importance in biomedical,chemical,food,and other fields.Traditional chiral recognition methods using fluorescent probes primarily rely on fluorescence intensity changes,which can compromise accuracy and repeatability.In this study,we report a novel fluorescent probe(R)-Z1 that achieves effective enantioselective recognition of chiral amino acids in water by altering emission wavelengths(>60 nm).This water-soluble probe(R)-Z1 exhibits cyan or yellow-green luminescence upon interaction with amino acid enantiomers,enabling reliable chiral detection of 14 natural amino acids.It also allows for the determination of enantiomeric excess through monitoring changes in luminescent color.Additionally,a logic operation with two inputs and three outputs was constructed based on these optical properties.Notably,amino acid enantiomers were successfully detected via dual-channel analysis at both the food and cellular levels.This study provides a new dynamic luminescence-based tool for the accurate sensing and detection of amino acid enantiomers.展开更多
With the booming development of electronic information science and 5G communication technology,electromagnetic radi-ation pollution poses a huge threat and damage to humanity.Developing novel and high-performance elec...With the booming development of electronic information science and 5G communication technology,electromagnetic radi-ation pollution poses a huge threat and damage to humanity.Developing novel and high-performance electromagnetic wave(EMW)ab-sorbers is an effective method to solve the above issue and has attracted the attention of many researchers.As a typical magnetic material,ferrite plays an important role in the design of high-performance EMW absorbers,and related research focuses on diversified synthesis methods,strong absorption performance,and refined microstructure development.Herein,we focus on the synthesis of ferrites and their composites and introduce recent advances in the high-temperature solid-phase method,sol-gel method,chemical coprecipitation method,and solvent thermal method in the preparation of high-performance EMW absorbers.This review aims to help researchers understand the advantages and disadvantages of ferrite-based EMW absorbers fabricated through these methods.It also provides important guidance and reference for researchers to design high-performance EMW absorption materials based on ferrite.展开更多
Isosteviol,the hydrolysate of stevioside,has attracted increasing attention from scientists because of its special molecular skeleton and extensive biological activities.In recent years,due to the continuous rise of o...Isosteviol,the hydrolysate of stevioside,has attracted increasing attention from scientists because of its special molecular skeleton and extensive biological activities.In recent years,due to the continuous rise of organocatalysis,an increasing number of organocatalysts based on isosteviol have been devised and synthesized to facilitate a range of highly enantioselective asymmetric synthesis.The isosteviol-type organocatalysts reported in the literature over the past decade and their applications in asymmetric catalysis are systematically analyzed and elaborated in order to provide assistance for the further design,synthesis,and application of organocatalysis derived from isosteviol.展开更多
All-cellulose composites(ACCs)are composites that use non-derivatized cellulose as both the matrix and the reinforcement phase.ACC consists entirely of cellulose,and since the reinforcement phase and the matrix have e...All-cellulose composites(ACCs)are composites that use non-derivatized cellulose as both the matrix and the reinforcement phase.ACC consists entirely of cellulose,and since the reinforcement phase and the matrix have exactly the same chemical properties,they can overcome the problem of poor fiber-matrix adhesion in biocomposites.In this study,ACC was prepared by partially dissolving wood pulp in a cryogenic aqueous phosphoric acid solution,and the effects of dissolution temperature,dissolution time and pressing load on the properties of ACC were investigated.The results showed that a dissolution time of 45 min achieved the optimal reinforcement-matrix ratio.The use of an aqueous ethanol solution at an ethanol mass fraction of 50%as a coagulation bath and a pressing load of 3000 kg during the drying process achieved the best mechanical properties of ACC,with a tensile strength of 49.3 MPa(approximately 210%higher than that of the untreated wood pulp)and an elastic modulus of 1.6 GPa(approximately 122%higher than that of the untreated wood pulp).The composite’s compactness affected ACC’s mechanical properties.The air permeability analysis showed that the barrier performance of ACC was also significantly better than that of the untreated wood pulp.With a pressing load of 3500 kg,the surface water contact angle(WCA)increased to 110.3°(approximately 94%higher than that of the untreated wood pulp),and the air permeability was significantly reduced to 1.1 mm/s,showing its good application prospects in the field of green packaging materials.展开更多
Therapy-induced modulation of the tumor microenvironment(TME)to overcome the immunosuppressive TME is considered to be a chance for cancer treatment.Herein,we prepared near-infrared absorbing aza-BODIPY PhEt-azaBDP wi...Therapy-induced modulation of the tumor microenvironment(TME)to overcome the immunosuppressive TME is considered to be a chance for cancer treatment.Herein,we prepared near-infrared absorbing aza-BODIPY PhEt-azaBDP with 1-phenylethyl group at 1,7-sites,a type I photodynamic-photothermal therapy(PDT-PTT)agent.Self-assembly PhEt-azaBDP nanoparticles(NPs)can provide combined phototherapeutic effects under light irradiation and simultaneously induce inflammatory TME,by monitoring tumorassociated macrophages(TAMs)repolarization.Utilizing cluster of differentiation 86(CD86)and CD163 as the M1-type marker and M2-type marker respectively,PhEt-azaBDP NPs resulted in the increasement of the expression of CD86 and the decreasement of the expression of CD163 in TAMs under near-infrared(NIR)light irradiation,promoting TAMs to switch from M2-phenotype to M1-phenotype.Inflammatory cytokines,interleukin-1β(IL-1β)and tumor necrosis factor-α(TNF-α),could be the key cytokine involved in the phototherapy-induced TME reprogramming.PhEt-azaBDP NPs could be a potential theranostic scaffold for the simultaneous induction and detection of TME reprogramming triggered by phototherapy.展开更多
Simultaneous degradation and detoxification during pharmaceutical and personal care product removal are important for water treatment.In this study,sodium niobate nanocubes decorated with graphitic carbon nitride(NbNC...Simultaneous degradation and detoxification during pharmaceutical and personal care product removal are important for water treatment.In this study,sodium niobate nanocubes decorated with graphitic carbon nitride(NbNC/g-C_(3)N_(4))were fabricated to achieve the efficient photocatalytic degradation and detoxification of ciprofloxacin(CIP)under simulated solar light.NaNbO_(3)nanocubes were in-situ transformed from Na_(2)Nb_(2)O_(6)·H_(2)O via thermal dehydration at the interface of g-C_(3)N_(4).The optimized NbNC/g-C_(3)N_(4)-1 was a type-I heterojunction,which showed a high conduction band(CB)level of−1.68 eV,leading to the efficient transfer of photogenerated electrons to O_(2) to produce primary reactive species,•O_(2)^(-).Density functional theory(DFT)calculations of the density of states indicated that C 2p and Nb 3d contributed to the CB,and 0.37 e^(-)transferred from NaNbO_(3)to g-C_(3)N_(4)in NbNC/g-C_(3)N_(4)based on the Mulliken population analysis of the built-in electric field intensity.NbNC/g-C_(3)N_(4)-1 had 3.3-and 2.3-fold of CIP degradation rate constants(k_(1)=0.173 min^(−1))compared with those of pristine g-C_(3)N_(4)and NaNbO_(3),respectively.In addition,N24,N19,and C5 in CIP with a high Fukui index were reactive sites for electrophilic attack by•O_(2)^(-),resulting in the defluorination and ring-opening of the piperazine moiety of the dominant degradation pathways.Intermediate/product identification,integrated with computational toxicity evaluation,further indicated a substantial detoxification effect during CIP degradation in the photocatalysis system.展开更多
D-D’-A type aza-borondipyrromethenes(aza-BODIPYs)were prepared by Suzuki cross-coupling reaction.Photothermal conversion efficiency of self-assemble aza-BODIPY-based nanoparticles(DA-azaBDP-NPs)with NIR-Ⅱ emission(...D-D’-A type aza-borondipyrromethenes(aza-BODIPYs)were prepared by Suzuki cross-coupling reaction.Photothermal conversion efficiency of self-assemble aza-BODIPY-based nanoparticles(DA-azaBDP-NPs)with NIR-Ⅱ emission(λ_(em)=1065 nm)was 37.2%under near infrared(NIR)irradiation,and the outstanding cytotoxicity was triggered by coexistence of DA-azaBDP-NPs and the NIR irradiation,with the decrease of glioblastoma migration and the inhibition of glioblastoma proliferation.DA-azaBDP-NPs could promote glioblastoma autophagy and accelerate the process of cell death.The photothermal therapy(PTT)of DAazaBDP-NPs can effectively induce glioblastoma death by apoptosis under the NIR irradiation,which is highly promising to be applied in vivo experiments of brain.展开更多
The kinetics of hydrolysis of cationic reactive disperse dyes containing quaternary group and chemical shift（13CNMR） of the adjacent carbon atoms with pyridine-acetylamino were discussed. The results show pyridine-a...The kinetics of hydrolysis of cationic reactive disperse dyes containing quaternary group and chemical shift（13CNMR） of the adjacent carbon atoms with pyridine-acetylamino were discussed. The results show pyridine-acetylamino reactive group had higher reactivity than chloroacetylamino and chemical shift（13 CNMR） of the adjacent carbon atoms with pyridine-acetylamino moved 18.77 ppm.展开更多
Recently,heterogeneous activation of peroxymonosulfate(PMS) to oxidatively degrade organic pollutants has been a hotspot.In the present work,copper ferrite-graphite oxide hybrid(CuFe2 O4@GO)was prepared and used as ca...Recently,heterogeneous activation of peroxymonosulfate(PMS) to oxidatively degrade organic pollutants has been a hotspot.In the present work,copper ferrite-graphite oxide hybrid(CuFe2 O4@GO)was prepared and used as catalyst to activate PMS for degradation of methylene blue(MB) in aqueous solution.A high degradation efficiency(93.3%) was achieved at the experimental conditions of20 mg/L MB,200 mg/L CuFe2 O4@GO,0.8 mmol/L PMS,and 25℃temperature.Moreover,CuFe2 O4@GO showed an excellent reusability and stability.The effects of various operational parameters including pollutant type,solution pH,catalyst dosage,PMS dosage,pollutant concentration,temperature,natural organic matter(NOM),and inorganic anions on the catalytic degradation process were comprehensively investigated and elucidated.The further mechanistic study revealed the Cu(Ⅱ)/Cu(Ⅰ) redox couple on CuFe2 O4@GO played the dominant role in PMS activation,where both hydroxyl and sulfate radicals were generated and proceeded the degradation of pollutants.In general,CuFe2 O4@GO is a promising heterocatalyst for PMS-based advanced oxidation processes(AOPs) in wastewater treatment.展开更多
Enhanced ozonation degradation of atrazine（ATZ） with nano-ZnO（nZnO） as catalyst and the influences of the operational parameters have been investigated through semi-continuous experiments in this study. The result...Enhanced ozonation degradation of atrazine（ATZ） with nano-ZnO（nZnO） as catalyst and the influences of the operational parameters have been investigated through semi-continuous experiments in this study. The results demonstrated that the combination of ozone（O3） and nZnO showed an obvious synergetic effect and the ATZ degradation conformed to pseudo-first-order kinetics. An improvement of ATZ degradation efficiency by 41.8% and pseudo-first-order rate constant by more than a factor of four was obtained in the O3/nZnO process after 5 min of reaction compared to O3 alone. Meanwhile, the degradation efficiency of ATZ was gradually enhanced with increasing nZnO dosage and initial pH in the range from 3.0 to 8.0, and a higher amount of ATZ was degraded when the initial concentration of ATZ rose from 0.5 to 5 mg/L. Additionally, sulfate ion, chloride ion, nitrate ion and low concentrations of humic acid substances led to enhancement of the ATZ degradation. The notable decrease of ATZ removal efficiency observed in the presence of radical scavengers and the results of free radical tests indicated thatUOH is the dominant active radical species. The mechanism investigation demonstrated that the enhancement effect could be attributed to the introduction of nZnO,which could promote the utilization of O3, enhance the formation of superoxide radical, and further accelerate the production of hydrogen peroxide and the generation of OH/O2-.展开更多
A comparative study of treatment of simulated wastewater containing Reactive Red 195 using zero-valent iron/activated carbon （ZVI/AC）, microwave discharge electrodeless lamp/sodium hypochlorite （MDEL/NaCIO） and th...A comparative study of treatment of simulated wastewater containing Reactive Red 195 using zero-valent iron/activated carbon （ZVI/AC）, microwave discharge electrodeless lamp/sodium hypochlorite （MDEL/NaCIO） and the combination of ZVI/AC- MDEL/NaCIO was conducted. The preliminary results showed the two steps method of ZVI/AC-MDEL/NaCIO had much higher degradation efficiency than both single steps. The final color removal percentage was nearly up to 100% and the chemical oxygen demand reduction percentage was up to approximately 82%. The effects of operational parameters, including initial pH value of simulated wastewater, ZVI/AC ratio and particle size of ZVI were also investigated. In addition, from the discussion of synergistic effect between ZVI/AC and MEDL/NaCIO, we found that in the ZVI/AC-MEDL/NaCIO process, ZVI/AC could break the azo bond firstly and then MEDLfNaCIO degraded the aromatic amine products effectively. Reversing the order would reduce the degradation efficiency.展开更多
Due to Visible light and Near-Infrared(Vis–NIR)stealth play an important role in the commercial,military,and scientific fields,camouflage materials related to it attracted increasing attention in decades.Green plant ...Due to Visible light and Near-Infrared(Vis–NIR)stealth play an important role in the commercial,military,and scientific fields,camouflage materials related to it attracted increasing attention in decades.Green plant leaves,as the most extensive background materials on the earth,were widely simulated in the camouflage materials.However,difficult full-spectrum simulation(380–2500 nm),low-similarity simulation and the complex preparation have been great challenges for Vis–NIR Camouflage Materials(Vis–NIR-CMs).Herein,basing on the color-matching principle,two novel Vis–NIR-CMs including Dark Green Materials and Light Green Materials(DGM and LGM)were facilely fabricated by simple printing organic disperse dyes including C.I.Disperse Blue 291,C.I.Disperse Yellow 114,and C.I.Disperse Orange 30(B-291,Y-114 and O-30),and titanium dioxide(TiO_(2))on the viscose fabrics.Based on the excellent red edge property of B-291 and high scattering ability of TiO2,DGM and LGM exhibited generally high spectral correlation coefficients r_(m)(>0.95)with green plant leaves.Moreover,with the great color performance,excellent objects covering performance,low areal density(<146.3 g cm^(−2)),high tensile strength(>7.7 MPa),high softness(>81.27),high air permeability(>45.848 mm s^(−1)),DGM and LGM showed good simulation performance and wearing comfort to satisfy the application needs.This work presents a high-similarity Vis–NIR-CMs as a reference for full-spectrum camouflage materials,as well as low-cost and efficient preparation method is beneficial to the development of camouflage field.展开更多
Firefighting protective clothing is a crucial protective equipment for firefighters to minimize skin burn and ensure safety firefighting operation and rescue mission.A recent increasing concern is to develop self-powe...Firefighting protective clothing is a crucial protective equipment for firefighters to minimize skin burn and ensure safety firefighting operation and rescue mission.A recent increasing concern is to develop self-powered fire warning materials that can be incorporated into the firefighting clothing to achieve active fire protection for firefighters before the protective clothing catches fire on fireground.However,it is still a challenge to facilely design and manufacture thermoelectric(TE)textile(TET)-based fire warning electronics with dynamic surface conformability and breathability.Here,we develop an alternate coaxial wet-spinning strategy to continuously produce alternating p/n-type TE aerogel fibers involving n-type Ti_(3)C_(2)T_(x)MXene and p-type MXene/SWCNT-COOH as core materials,and tough aramid nanofiber as protective shell,which simultaneously ensure the flexibility and high-efficiency TE power generation.With such alternating p/n-type TE fibers,TET-based self-powered fire warning sensors with high mechanical stability and wearability are successfully fabricated through stitching the alternating p-n segment TE fibers into aramid fabric.The results indicate that TET-based fire warning electronics containing 50 p-n pairs produce the open-circuit voltage of 7.5 mV with a power density of 119.79 nW cm-2 at a temperature difference of 300℃.The output voltage signal is then calculated as corresponding surface temperature of firefighting clothing based on a linear relationship between TE voltage and temperature.The fire alarm response time and flame-retardant properties are further displayed.Such self-powered fire warning electronics are true textiles that offer breathability and compatibility with body movement,demonstrating their potential application in firefighting clothing.展开更多
As a novel wastewater treatment strategy,the intimate coupling of photocatalysis and biodegradation(ICPB)has been attracted attention,which is ascribed to its combination of the advantages of photocatalytic reactions ...As a novel wastewater treatment strategy,the intimate coupling of photocatalysis and biodegradation(ICPB)has been attracted attention,which is ascribed to its combination of the advantages of photocatalytic reactions and biological treatment.The selection of carriers is important since it affects the stability of the system and the removal efficiency of pollutants.In this study,a novel ICPB system was successfully constructed by loading photocatalytic materials(i.e.,TiO_(2),N-TiO_(2),and Ag-TiO_(2))and microbes onto non-woven cotton fabric.The photocatalysts were characterized by scanning electron microscope-energy dispersive spectrometer(SEM-EDS),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).This system exhibited good performance in degrading tetracycline(TC)in water.The results showed that Ag-TiO_(2)-ICPB had the maximum removal efficiency of tetracycline(94.7%)in 5 h,which was 16.5%higher than the photocatalysis alone.After five cycles,82.9%of tetracycline could be still degraded through Ag-TiO_(2)-ICPB.SEM spectrum showed microbes on the material changed little before and after the reactions.This result implied the materials were stable,and then beneficial for degrading of pollutants continuously.The intermediates were detected through ultraperformance liquid chromatography-mass spectrometer(UPLC-MS)and the plausible degradation pathways were proposed.Electron paramagnetic resonance(EPR)analysis showed·OH and O_(2)·-were the main reactive oxygen species for TC degradation.In conclusion,the ICPB system with non-woven cotton fabric as a carrier has certain application prospects for antibiotic-containing wastewater.展开更多
文摘Changes of dyeing behavior of wool after stretching - setting treatment are studied.Effects of stretching - setting on wool structure are analyzed.It is concluded that stretching - setting treatment not only reduces wool diameter and increases wool length,but also brings about low-temperature dyeing of wool.
基金supported by Natural Science Foundation of Shanghai (20ZR1400300)Textile Vision Applied Basic Research Project (J202005)National Key Research & Development Program of China (2017YFB0309600)。
文摘The development of pollution-free dyeing technology, including anhydrous dyeing and non-aqueous dyeing technologies, has always been an important way and research hot in energy conservation and emission reduction. Designing new structural dye molecules is the key to water-saving dyeing processes.Herein, three reactive dyes were designed and synthesized, which contained large planar multiconjugated systems and multi-reactive groups. The designed reactive dyes are expected to have high affinity and high fixations in non-aqueous or small bath dyeing processes. The reactive dyes were applied in the decamethylcyclopentasiloxane(DMCS) reverse micelle dyeing for cotton fabric. High exhaustion rate of 99.35%, 98.10% and 98.80%, and fixation rate of 95.15%, 96.34% and 94.40% for three dyes, R1,R2 and R3, could be respectively obtained. The dyes can be fully utilized and had excellent dyeing performance, fastness and levelling properties under the revere micelle dyeing. The cotton fabric is like an oil-water separator in the dyeing process, where the dye micelles rapidly absorb and permeate into the cotton fibers. DMCS circulates around the fabric to transfer mass and energy. After dyeing, the solvent can be separated quickly and reused. The new reactive dyes containing large planar and multi-conjugated systems have potential application in green and sustainable dyeing technology with less wastewater and higher utilization.
文摘Natural dyestuff of luteolin was isolated and used to dye wool fabric in this paper. Ethanol extraction and high-speed countercurrent chromatography (HSCCC) were used to extract and purify the luteolin from the peanut shell, and the structure of the isolated luteolin was characterized with FTIR techniques. The interaction between dyestuff and fiber was preliminarily discussed through thermodynamic study and supramolecular structure simulation to explain the intrinsic reasons why the color fastness was low when luteolin was applied to dyeing wool fabric. The extraction condition and purification parameter were as follows: 65% ethanol, ratio of material to liquid 1:20, 80°C, 3 h, chloroform-methanol-water (4/3/2, V/V), 800 rmp/min, 2.0 Mkpa, 0.5 mL/ min and 280 nm. The results of dyeing thermodynamics showed that the sorption isotherm of luteolin on wool fabric was consistent with Nernst model and similar to the disperse dyestuff. With molecular simulation, luteolin and glycin composed 8 stable complexes whose Laplacian values all were greater than 0, which suggested typical hydrogen bonds existing. The complex with three hydrogen bonds was proved the most stable. Both studies on thermodynamics and supramolecular simulation revealed that luteolin on wool fabric mainly depended on the weak hydrogen bonds interaction that determined the low dyefastness.
文摘The dyeing temperature of natural dye lac red on two kinds of natural protein fibers was studied, and the interaction between dyestuff and fiber was discussed through thermodynamic study and density functional theory (DFT) calculation. The optimum temperature for lac red dyed silk was 60˚C and wool showed a better response at 90˚C. The thermodynamics study revealed good Nernst isotherm and Freundlich adsorption models respectively, and the lac dye adsorption processes were both spontaneous and exothermic. The potential interaction of Laccaic acid A with the external environment by electrostatic potential and atomic charge distribution was first explored. With molecular simulation, Laccaic acid A and glycine composed 8 stable complexes. Then, typical hydrogen bonds, bond length, and binding energy, etc. were analyzed. The results revealed lac red on silk and wool fabric mainly depended on the weak hydrogen bonds and van der Waals force which determined the low dye fastness.
文摘In this study, the dyeing properties of different fabric species were investigated using root extract of yellow sormunen （Alkanna orientalis）. For this purpose, the cotton and wool fabrics were dyed using the root extract of yellow sormunen by pre-mordanting, together-mordanting and last-mordanting methods with copper sulfate （CuSO4）, iron sulfate （FeSO4） and aluminum sulfate （AiK（SO4）2） at medium pH. The same procedure was applied to cotton and wool fabrics that allowed in Artifical Urinary System （AUS） [%3 NH3 ＋ %3 urea ＋ %3 CAC2O4（g/v）] for 24 h. The color codes were determined with Pantone Color Quide, and K/S and L＊ a＊ b＊ values were detected with color measurement spectrophotometer, and also washing-, crocking-fastness levels were evaluated using gray scale. According to the evaluations, the fabrics dyed pre-treated with AUS have higher fastness values than the unpre-treated dyed fabrics with AUS.
基金the financial support from the National Natural Science Foundation of China(Nos.22377097,22307036,22074114)Natural Science Foundation of Hubei Province of China(Nos.2020CFB623,2021CFB556)Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education(No.LCX202305)。
文摘The detection of amino acid enantiomers holds significant importance in biomedical,chemical,food,and other fields.Traditional chiral recognition methods using fluorescent probes primarily rely on fluorescence intensity changes,which can compromise accuracy and repeatability.In this study,we report a novel fluorescent probe(R)-Z1 that achieves effective enantioselective recognition of chiral amino acids in water by altering emission wavelengths(>60 nm).This water-soluble probe(R)-Z1 exhibits cyan or yellow-green luminescence upon interaction with amino acid enantiomers,enabling reliable chiral detection of 14 natural amino acids.It also allows for the determination of enantiomeric excess through monitoring changes in luminescent color.Additionally,a logic operation with two inputs and three outputs was constructed based on these optical properties.Notably,amino acid enantiomers were successfully detected via dual-channel analysis at both the food and cellular levels.This study provides a new dynamic luminescence-based tool for the accurate sensing and detection of amino acid enantiomers.
基金supported by the National Natural Science Foundation of China(No.52377026)Taishan Scholars and Young Experts Program of Shandong Province,China(No.tsqn202103057)the Natural Science Foundation of Shandong Province,China(No.ZR2024ME046).
文摘With the booming development of electronic information science and 5G communication technology,electromagnetic radi-ation pollution poses a huge threat and damage to humanity.Developing novel and high-performance electromagnetic wave(EMW)ab-sorbers is an effective method to solve the above issue and has attracted the attention of many researchers.As a typical magnetic material,ferrite plays an important role in the design of high-performance EMW absorbers,and related research focuses on diversified synthesis methods,strong absorption performance,and refined microstructure development.Herein,we focus on the synthesis of ferrites and their composites and introduce recent advances in the high-temperature solid-phase method,sol-gel method,chemical coprecipitation method,and solvent thermal method in the preparation of high-performance EMW absorbers.This review aims to help researchers understand the advantages and disadvantages of ferrite-based EMW absorbers fabricated through these methods.It also provides important guidance and reference for researchers to design high-performance EMW absorption materials based on ferrite.
基金Project supported by the National Natural Science Foundation of China(No.51403053)the University Scientific Innovation Team of Henan Province(No.24IRTSTHN017)。
文摘Isosteviol,the hydrolysate of stevioside,has attracted increasing attention from scientists because of its special molecular skeleton and extensive biological activities.In recent years,due to the continuous rise of organocatalysis,an increasing number of organocatalysts based on isosteviol have been devised and synthesized to facilitate a range of highly enantioselective asymmetric synthesis.The isosteviol-type organocatalysts reported in the literature over the past decade and their applications in asymmetric catalysis are systematically analyzed and elaborated in order to provide assistance for the further design,synthesis,and application of organocatalysis derived from isosteviol.
基金Fundamental Research Funds for the Central Universities,China(No.2232023G-04)。
文摘All-cellulose composites(ACCs)are composites that use non-derivatized cellulose as both the matrix and the reinforcement phase.ACC consists entirely of cellulose,and since the reinforcement phase and the matrix have exactly the same chemical properties,they can overcome the problem of poor fiber-matrix adhesion in biocomposites.In this study,ACC was prepared by partially dissolving wood pulp in a cryogenic aqueous phosphoric acid solution,and the effects of dissolution temperature,dissolution time and pressing load on the properties of ACC were investigated.The results showed that a dissolution time of 45 min achieved the optimal reinforcement-matrix ratio.The use of an aqueous ethanol solution at an ethanol mass fraction of 50%as a coagulation bath and a pressing load of 3000 kg during the drying process achieved the best mechanical properties of ACC,with a tensile strength of 49.3 MPa(approximately 210%higher than that of the untreated wood pulp)and an elastic modulus of 1.6 GPa(approximately 122%higher than that of the untreated wood pulp).The composite’s compactness affected ACC’s mechanical properties.The air permeability analysis showed that the barrier performance of ACC was also significantly better than that of the untreated wood pulp.With a pressing load of 3500 kg,the surface water contact angle(WCA)increased to 110.3°(approximately 94%higher than that of the untreated wood pulp),and the air permeability was significantly reduced to 1.1 mm/s,showing its good application prospects in the field of green packaging materials.
基金supported by the National Natural Science Foundation of China(Nos.22078201,U1908202)Liaoning&Shenyang Key Laboratory of Functional Dye and Pigment(Nos.2021JH13/10200018,21-104-0-23,LJKZ0453)China Medical University’s High-Quality Development Science and Technology Funding Program(Nos.2022JH2/20200063,2023JH2/20200162).
文摘Therapy-induced modulation of the tumor microenvironment(TME)to overcome the immunosuppressive TME is considered to be a chance for cancer treatment.Herein,we prepared near-infrared absorbing aza-BODIPY PhEt-azaBDP with 1-phenylethyl group at 1,7-sites,a type I photodynamic-photothermal therapy(PDT-PTT)agent.Self-assembly PhEt-azaBDP nanoparticles(NPs)can provide combined phototherapeutic effects under light irradiation and simultaneously induce inflammatory TME,by monitoring tumorassociated macrophages(TAMs)repolarization.Utilizing cluster of differentiation 86(CD86)and CD163 as the M1-type marker and M2-type marker respectively,PhEt-azaBDP NPs resulted in the increasement of the expression of CD86 and the decreasement of the expression of CD163 in TAMs under near-infrared(NIR)light irradiation,promoting TAMs to switch from M2-phenotype to M1-phenotype.Inflammatory cytokines,interleukin-1β(IL-1β)and tumor necrosis factor-α(TNF-α),could be the key cytokine involved in the phototherapy-induced TME reprogramming.PhEt-azaBDP NPs could be a potential theranostic scaffold for the simultaneous induction and detection of TME reprogramming triggered by phototherapy.
基金the National Key Research and Development Program of China(Nos.2021YFA1202500 and 2022YFF1303004)Shenzhen Science and Technology Program(No.JCYJ20220531093205013)+6 种基金the National Natural Science Foundation of China(NSFC)(Nos.52100069,52270053 and 52200084)the Beijing Natural Science Foundation(No.8232035),the Beijing Nova Program(No.20220484215)the Beijing National Laboratory for Molecular Sciences(No.BNLMS2023011)Emerging Engineering Interdisciplinary-Young Scholars Project(Peking University),the Fundamental Research Funds for the Central Universities are greatly acknowledgedsupported by the High-Performance Computing Platform of Peking Universitythe National Key Scientific and Technological Infrastructure project“Earth System Numerical Simulation Facility”(EarthLab)are also acknowledgedsupported by the program of“Research on Advanced Treatment Technology of New Pollutants in Domestic Sewage of Residential District”.
文摘Simultaneous degradation and detoxification during pharmaceutical and personal care product removal are important for water treatment.In this study,sodium niobate nanocubes decorated with graphitic carbon nitride(NbNC/g-C_(3)N_(4))were fabricated to achieve the efficient photocatalytic degradation and detoxification of ciprofloxacin(CIP)under simulated solar light.NaNbO_(3)nanocubes were in-situ transformed from Na_(2)Nb_(2)O_(6)·H_(2)O via thermal dehydration at the interface of g-C_(3)N_(4).The optimized NbNC/g-C_(3)N_(4)-1 was a type-I heterojunction,which showed a high conduction band(CB)level of−1.68 eV,leading to the efficient transfer of photogenerated electrons to O_(2) to produce primary reactive species,•O_(2)^(-).Density functional theory(DFT)calculations of the density of states indicated that C 2p and Nb 3d contributed to the CB,and 0.37 e^(-)transferred from NaNbO_(3)to g-C_(3)N_(4)in NbNC/g-C_(3)N_(4)based on the Mulliken population analysis of the built-in electric field intensity.NbNC/g-C_(3)N_(4)-1 had 3.3-and 2.3-fold of CIP degradation rate constants(k_(1)=0.173 min^(−1))compared with those of pristine g-C_(3)N_(4)and NaNbO_(3),respectively.In addition,N24,N19,and C5 in CIP with a high Fukui index were reactive sites for electrophilic attack by•O_(2)^(-),resulting in the defluorination and ring-opening of the piperazine moiety of the dominant degradation pathways.Intermediate/product identification,integrated with computational toxicity evaluation,further indicated a substantial detoxification effect during CIP degradation in the photocatalysis system.
基金supported by the National Natural Science Foundation of China(Nos.22078201,U1908202)Liaoning&Shenyang Key Laboratory of Functional Dye and Pigment(Nos.2021JH13/10200018,21-104-0-23).
文摘D-D’-A type aza-borondipyrromethenes(aza-BODIPYs)were prepared by Suzuki cross-coupling reaction.Photothermal conversion efficiency of self-assemble aza-BODIPY-based nanoparticles(DA-azaBDP-NPs)with NIR-Ⅱ emission(λ_(em)=1065 nm)was 37.2%under near infrared(NIR)irradiation,and the outstanding cytotoxicity was triggered by coexistence of DA-azaBDP-NPs and the NIR irradiation,with the decrease of glioblastoma migration and the inhibition of glioblastoma proliferation.DA-azaBDP-NPs could promote glioblastoma autophagy and accelerate the process of cell death.The photothermal therapy(PTT)of DAazaBDP-NPs can effectively induce glioblastoma death by apoptosis under the NIR irradiation,which is highly promising to be applied in vivo experiments of brain.
文摘The kinetics of hydrolysis of cationic reactive disperse dyes containing quaternary group and chemical shift（13CNMR） of the adjacent carbon atoms with pyridine-acetylamino were discussed. The results show pyridine-acetylamino reactive group had higher reactivity than chloroacetylamino and chemical shift（13 CNMR） of the adjacent carbon atoms with pyridine-acetylamino moved 18.77 ppm.
基金the Collaborative Innovation Plan of Hubei Province for Key Technologies in the Eco-Ramie Industryfinancially supported by the Natural Science Foundation of Hubei Province,China (No.2018CFB515)the financial support from the National Natural Science Foundation of China (No.41701541)
文摘Recently,heterogeneous activation of peroxymonosulfate(PMS) to oxidatively degrade organic pollutants has been a hotspot.In the present work,copper ferrite-graphite oxide hybrid(CuFe2 O4@GO)was prepared and used as catalyst to activate PMS for degradation of methylene blue(MB) in aqueous solution.A high degradation efficiency(93.3%) was achieved at the experimental conditions of20 mg/L MB,200 mg/L CuFe2 O4@GO,0.8 mmol/L PMS,and 25℃temperature.Moreover,CuFe2 O4@GO showed an excellent reusability and stability.The effects of various operational parameters including pollutant type,solution pH,catalyst dosage,PMS dosage,pollutant concentration,temperature,natural organic matter(NOM),and inorganic anions on the catalytic degradation process were comprehensively investigated and elucidated.The further mechanistic study revealed the Cu(Ⅱ)/Cu(Ⅰ) redox couple on CuFe2 O4@GO played the dominant role in PMS activation,where both hydroxyl and sulfate radicals were generated and proceeded the degradation of pollutants.In general,CuFe2 O4@GO is a promising heterocatalyst for PMS-based advanced oxidation processes(AOPs) in wastewater treatment.
基金supported by the state supported project funds for researchdemonstration on the key technology for clean production in textile printing and dyeing (2014BAC13B02)
文摘Enhanced ozonation degradation of atrazine（ATZ） with nano-ZnO（nZnO） as catalyst and the influences of the operational parameters have been investigated through semi-continuous experiments in this study. The results demonstrated that the combination of ozone（O3） and nZnO showed an obvious synergetic effect and the ATZ degradation conformed to pseudo-first-order kinetics. An improvement of ATZ degradation efficiency by 41.8% and pseudo-first-order rate constant by more than a factor of four was obtained in the O3/nZnO process after 5 min of reaction compared to O3 alone. Meanwhile, the degradation efficiency of ATZ was gradually enhanced with increasing nZnO dosage and initial pH in the range from 3.0 to 8.0, and a higher amount of ATZ was degraded when the initial concentration of ATZ rose from 0.5 to 5 mg/L. Additionally, sulfate ion, chloride ion, nitrate ion and low concentrations of humic acid substances led to enhancement of the ATZ degradation. The notable decrease of ATZ removal efficiency observed in the presence of radical scavengers and the results of free radical tests indicated thatUOH is the dominant active radical species. The mechanism investigation demonstrated that the enhancement effect could be attributed to the introduction of nZnO,which could promote the utilization of O3, enhance the formation of superoxide radical, and further accelerate the production of hydrogen peroxide and the generation of OH/O2-.
基金supported by the Major Projects on Control and Rectification of Water Body Pollution (Water Special Project) (No.2009ZX07010-001,2008ZX07526-001)the National Basic Research Program (973) of China (No.2008CB418201)
文摘A comparative study of treatment of simulated wastewater containing Reactive Red 195 using zero-valent iron/activated carbon （ZVI/AC）, microwave discharge electrodeless lamp/sodium hypochlorite （MDEL/NaCIO） and the combination of ZVI/AC- MDEL/NaCIO was conducted. The preliminary results showed the two steps method of ZVI/AC-MDEL/NaCIO had much higher degradation efficiency than both single steps. The final color removal percentage was nearly up to 100% and the chemical oxygen demand reduction percentage was up to approximately 82%. The effects of operational parameters, including initial pH value of simulated wastewater, ZVI/AC ratio and particle size of ZVI were also investigated. In addition, from the discussion of synergistic effect between ZVI/AC and MEDL/NaCIO, we found that in the ZVI/AC-MEDL/NaCIO process, ZVI/AC could break the azo bond firstly and then MEDLfNaCIO degraded the aromatic amine products effectively. Reversing the order would reduce the degradation efficiency.
基金This work was supported by the National Natural Science Foundation of China(grant numbers 21808086)Natural Science Foundation of Jiangsu Province(Grant numbers BK20191334)Fundamental Research Funds for the Central Universities(Grant numbers JUSRP21933).
文摘Due to Visible light and Near-Infrared(Vis–NIR)stealth play an important role in the commercial,military,and scientific fields,camouflage materials related to it attracted increasing attention in decades.Green plant leaves,as the most extensive background materials on the earth,were widely simulated in the camouflage materials.However,difficult full-spectrum simulation(380–2500 nm),low-similarity simulation and the complex preparation have been great challenges for Vis–NIR Camouflage Materials(Vis–NIR-CMs).Herein,basing on the color-matching principle,two novel Vis–NIR-CMs including Dark Green Materials and Light Green Materials(DGM and LGM)were facilely fabricated by simple printing organic disperse dyes including C.I.Disperse Blue 291,C.I.Disperse Yellow 114,and C.I.Disperse Orange 30(B-291,Y-114 and O-30),and titanium dioxide(TiO_(2))on the viscose fabrics.Based on the excellent red edge property of B-291 and high scattering ability of TiO2,DGM and LGM exhibited generally high spectral correlation coefficients r_(m)(>0.95)with green plant leaves.Moreover,with the great color performance,excellent objects covering performance,low areal density(<146.3 g cm^(−2)),high tensile strength(>7.7 MPa),high softness(>81.27),high air permeability(>45.848 mm s^(−1)),DGM and LGM showed good simulation performance and wearing comfort to satisfy the application needs.This work presents a high-similarity Vis–NIR-CMs as a reference for full-spectrum camouflage materials,as well as low-cost and efficient preparation method is beneficial to the development of camouflage field.
基金This work was financially supported by the Opening Project of National Local Joint Laboratory for Advanced Textile Processing and Clean Production(FX2022006)Guiding Project of Natural Science Foundation of Hubei province(2022CFC072)+2 种基金Guiding Project of Scientific Research Plan of Education Department of Hubei Province(B2022081)Shenghong Key Scientific Research Project of Emergency Support and Public Safety Fiber Materials and Products(2022-rw0101)Science and Technology Guidance Program of China National Textile and Apparel Council(2022002).
文摘Firefighting protective clothing is a crucial protective equipment for firefighters to minimize skin burn and ensure safety firefighting operation and rescue mission.A recent increasing concern is to develop self-powered fire warning materials that can be incorporated into the firefighting clothing to achieve active fire protection for firefighters before the protective clothing catches fire on fireground.However,it is still a challenge to facilely design and manufacture thermoelectric(TE)textile(TET)-based fire warning electronics with dynamic surface conformability and breathability.Here,we develop an alternate coaxial wet-spinning strategy to continuously produce alternating p/n-type TE aerogel fibers involving n-type Ti_(3)C_(2)T_(x)MXene and p-type MXene/SWCNT-COOH as core materials,and tough aramid nanofiber as protective shell,which simultaneously ensure the flexibility and high-efficiency TE power generation.With such alternating p/n-type TE fibers,TET-based self-powered fire warning sensors with high mechanical stability and wearability are successfully fabricated through stitching the alternating p-n segment TE fibers into aramid fabric.The results indicate that TET-based fire warning electronics containing 50 p-n pairs produce the open-circuit voltage of 7.5 mV with a power density of 119.79 nW cm-2 at a temperature difference of 300℃.The output voltage signal is then calculated as corresponding surface temperature of firefighting clothing based on a linear relationship between TE voltage and temperature.The fire alarm response time and flame-retardant properties are further displayed.Such self-powered fire warning electronics are true textiles that offer breathability and compatibility with body movement,demonstrating their potential application in firefighting clothing.
基金financially supported by the Central Government Guidance for Local Science and Technology Development Projects for Hubei province,China(No.2019ZYYD068)。
文摘As a novel wastewater treatment strategy,the intimate coupling of photocatalysis and biodegradation(ICPB)has been attracted attention,which is ascribed to its combination of the advantages of photocatalytic reactions and biological treatment.The selection of carriers is important since it affects the stability of the system and the removal efficiency of pollutants.In this study,a novel ICPB system was successfully constructed by loading photocatalytic materials(i.e.,TiO_(2),N-TiO_(2),and Ag-TiO_(2))and microbes onto non-woven cotton fabric.The photocatalysts were characterized by scanning electron microscope-energy dispersive spectrometer(SEM-EDS),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).This system exhibited good performance in degrading tetracycline(TC)in water.The results showed that Ag-TiO_(2)-ICPB had the maximum removal efficiency of tetracycline(94.7%)in 5 h,which was 16.5%higher than the photocatalysis alone.After five cycles,82.9%of tetracycline could be still degraded through Ag-TiO_(2)-ICPB.SEM spectrum showed microbes on the material changed little before and after the reactions.This result implied the materials were stable,and then beneficial for degrading of pollutants continuously.The intermediates were detected through ultraperformance liquid chromatography-mass spectrometer(UPLC-MS)and the plausible degradation pathways were proposed.Electron paramagnetic resonance(EPR)analysis showed·OH and O_(2)·-were the main reactive oxygen species for TC degradation.In conclusion,the ICPB system with non-woven cotton fabric as a carrier has certain application prospects for antibiotic-containing wastewater.
