Electrospinning technology was employed to fabricate a novel composite membrane integrating collagen from Peruvian squid skin with polystyrene(PS),polycaprolactone(PCL),and green-synthesized nickel oxide(NiO)nanoparti...Electrospinning technology was employed to fabricate a novel composite membrane integrating collagen from Peruvian squid skin with polystyrene(PS),polycaprolactone(PCL),and green-synthesized nickel oxide(NiO)nanoparticles(PS/PCL/CO/NiO).The addition of collagen(CO)and NiO nanoparticles significantly enhanced the membrane's hydrophobicity,as evidenced by an increase in the water contact angle from 124.8±0.6°to 131.2±1.2°.Mechanical properties showed substantial improvement,with tensile strength increasing by 86%(from 5.05±1.6 MPa to 9.39±1.4 MPa)and elongation at break improving by 48%compared to conventional NiO membranes.Thermal analysis indicated increased stability,with a higher endothermic peak and an enthalpy increase from 6.885 J/g to 8.584 J/g.Antibacterial assays revealed strong efficacy against Escherichia coli and Staphylococcus aureus,reducing bacterial growth by over 90%.The enhanced hydrophobicity,mechanical strength,thermal stability,and antibacterial activity of PS/PCL/CO/NiO membranes make them highly promising for applications in tissue engineering,wound dressings,and water treatment.展开更多
Although PVDF flat sheet membranes have been widely tested in MD,their synthesis and modifications currently require increased use of green and inexpensive materials.In this study,flat sheet PVDF membranes were synthe...Although PVDF flat sheet membranes have been widely tested in MD,their synthesis and modifications currently require increased use of green and inexpensive materials.In this study,flat sheet PVDF membranes were synthesized using phase inversion and water as the pore former.Remarkably,the water added in the casting solution improved the membrane pore sizes;where the maximum pore size was 0.58μm.Also,the incorporation of f-SiO2NPs in the membrane matrix considerably enhanced the membrane hydrophobicity.Specifically,the membrane contact angles increased from 96°to 153°.Additionally,other parameters investigated were mechanical strength and liquid entry pressure(LEP).The maximum recorded values were 2.26 MPa and 239 kPa,respectively.The modified membranes(i.e.,using water as the pore former and f-SiO2NPs)were the most efficient,showing maximum salt rejection of 99.9%and water flux of 11.6 LMH;thus,indicating their capability to be used as efficient materials for the recovery of high purity water in MD.展开更多
Co-encapsulation of bioactive compounds with different functionality in a carrier has received considerable attention,while co-encapsulation of bioactives with different solubility remains a challenge.In this study,th...Co-encapsulation of bioactive compounds with different functionality in a carrier has received considerable attention,while co-encapsulation of bioactives with different solubility remains a challenge.In this study,the coencapsulation of hydrophilic L-ascorbate and hydrophobic curcumin was achieved using an organic-free method.The aim of this work was to evaluate the efficacy of chitosan coating loaded with L-ascorbate on the complexation of curcumin with caseinate by investigating their interaction,storage stability and release behavior during simulated digestion.The size andζ-potential of the optimized chitosan-caseinate binary particles at pH 5.0 were 582 nm and 28 mV,respectively.L-ascorbate electrostatically interacted with chitosan and then coated on the caseinate particles where hydrophobic curcumin was encapsulated.The encapsulation efficiency of curcumin and L-ascorbate was 96.2%and 47.6%,respectively.L-ascorbate-loaded chitosan coating significantly improved the storage and irradiation stability of curcumin and inhibited the structural changes of caseinate induced by the loaded curcumin after storage.The antioxidant activity of the co-delivered system was significantly improved compared with either individual system and basically unchanged during irradiation.These results may serve as a helpful guide for future study on the optimization of core-shell particles for the co-delivery of multiple bioactive compounds.展开更多
This study investigated the effects of bubble or bubble gel characteristics on gas loading properties.The bubble carriers prepared by starch-fatty acid salt(SFAC)complex presented a better loading ability for ethylene...This study investigated the effects of bubble or bubble gel characteristics on gas loading properties.The bubble carriers prepared by starch-fatty acid salt(SFAC)complex presented a better loading ability for ethylene with content in the range of 0.43-0.95 mL/g,in which bubble system prepared by 4%SFAC dispersion showed a better gas loading performance(0.95 mL/g).The gas content significantly decreased to 0.22-0.66 mL/g after bubble gel formation.However,all bubble gel had a slower gas release rate than that of corresponding bubble.In bubble gel system,bubble cavity immobilized with a gel network to reduce bubble breakage and coalescence,which was beneficial for retarding gas escaping.Besides,water layer surrounded by bubble cavity,as a physical barrier,could further slow gas-escaping speed.As an effective carrier,the bubble and bubble gel carriers based on starch are potential material for ethylene gas encapsulation used in fruit ripening applications.展开更多
基金supported by the Higher Education Discipline Innovation Project(D18012)the Department of Jilin Science and Technology(No.20230508023RC).
文摘Electrospinning technology was employed to fabricate a novel composite membrane integrating collagen from Peruvian squid skin with polystyrene(PS),polycaprolactone(PCL),and green-synthesized nickel oxide(NiO)nanoparticles(PS/PCL/CO/NiO).The addition of collagen(CO)and NiO nanoparticles significantly enhanced the membrane's hydrophobicity,as evidenced by an increase in the water contact angle from 124.8±0.6°to 131.2±1.2°.Mechanical properties showed substantial improvement,with tensile strength increasing by 86%(from 5.05±1.6 MPa to 9.39±1.4 MPa)and elongation at break improving by 48%compared to conventional NiO membranes.Thermal analysis indicated increased stability,with a higher endothermic peak and an enthalpy increase from 6.885 J/g to 8.584 J/g.Antibacterial assays revealed strong efficacy against Escherichia coli and Staphylococcus aureus,reducing bacterial growth by over 90%.The enhanced hydrophobicity,mechanical strength,thermal stability,and antibacterial activity of PS/PCL/CO/NiO membranes make them highly promising for applications in tissue engineering,wound dressings,and water treatment.
基金The authors would like to acknowledge the South African National Research Foundation for funding this work.
文摘Although PVDF flat sheet membranes have been widely tested in MD,their synthesis and modifications currently require increased use of green and inexpensive materials.In this study,flat sheet PVDF membranes were synthesized using phase inversion and water as the pore former.Remarkably,the water added in the casting solution improved the membrane pore sizes;where the maximum pore size was 0.58μm.Also,the incorporation of f-SiO2NPs in the membrane matrix considerably enhanced the membrane hydrophobicity.Specifically,the membrane contact angles increased from 96°to 153°.Additionally,other parameters investigated were mechanical strength and liquid entry pressure(LEP).The maximum recorded values were 2.26 MPa and 239 kPa,respectively.The modified membranes(i.e.,using water as the pore former and f-SiO2NPs)were the most efficient,showing maximum salt rejection of 99.9%and water flux of 11.6 LMH;thus,indicating their capability to be used as efficient materials for the recovery of high purity water in MD.
基金the Chinese Scholarship Council(CSC)research program for providing funding for Xin Yin(NO.202106790052).
文摘Co-encapsulation of bioactive compounds with different functionality in a carrier has received considerable attention,while co-encapsulation of bioactives with different solubility remains a challenge.In this study,the coencapsulation of hydrophilic L-ascorbate and hydrophobic curcumin was achieved using an organic-free method.The aim of this work was to evaluate the efficacy of chitosan coating loaded with L-ascorbate on the complexation of curcumin with caseinate by investigating their interaction,storage stability and release behavior during simulated digestion.The size andζ-potential of the optimized chitosan-caseinate binary particles at pH 5.0 were 582 nm and 28 mV,respectively.L-ascorbate electrostatically interacted with chitosan and then coated on the caseinate particles where hydrophobic curcumin was encapsulated.The encapsulation efficiency of curcumin and L-ascorbate was 96.2%and 47.6%,respectively.L-ascorbate-loaded chitosan coating significantly improved the storage and irradiation stability of curcumin and inhibited the structural changes of caseinate induced by the loaded curcumin after storage.The antioxidant activity of the co-delivered system was significantly improved compared with either individual system and basically unchanged during irradiation.These results may serve as a helpful guide for future study on the optimization of core-shell particles for the co-delivery of multiple bioactive compounds.
基金the National Natural Science Foundation of China(31771929)Guangdong Basic and Applied Basic Research Foundation(2023A1515012195)+1 种基金the 111 Project(B17018)the Chinese Scholarship Council(CSC)for fund-ing as a joint PhD(202206150087)at Ghent University。
文摘This study investigated the effects of bubble or bubble gel characteristics on gas loading properties.The bubble carriers prepared by starch-fatty acid salt(SFAC)complex presented a better loading ability for ethylene with content in the range of 0.43-0.95 mL/g,in which bubble system prepared by 4%SFAC dispersion showed a better gas loading performance(0.95 mL/g).The gas content significantly decreased to 0.22-0.66 mL/g after bubble gel formation.However,all bubble gel had a slower gas release rate than that of corresponding bubble.In bubble gel system,bubble cavity immobilized with a gel network to reduce bubble breakage and coalescence,which was beneficial for retarding gas escaping.Besides,water layer surrounded by bubble cavity,as a physical barrier,could further slow gas-escaping speed.As an effective carrier,the bubble and bubble gel carriers based on starch are potential material for ethylene gas encapsulation used in fruit ripening applications.
