Three-dimensional porous paper was prepared by using polysulfonamide (PSA) fiber and pulp as the raw materials. The effect of PSA fiber to pulp ratios on the mechanical strength and adsorption properties (using methyl...Three-dimensional porous paper was prepared by using polysulfonamide (PSA) fiber and pulp as the raw materials. The effect of PSA fiber to pulp ratios on the mechanical strength and adsorption properties (using methyl orange and rhodamine B dyes in their aqueous phase) of the paper were studied. The results showed that the tensile strength and elongation characteristics decreased as the PSA fiber to pulp ratio increased, while the tear strength increased. PSA paper showed good adsorption performance for both methyl orange and rhodamine B, with the adsorption process conforming to the pseudo-second-order and Langmuir isotherm models, indicating monolayer chemical adsorption. The study has provided an improved theoretical and scientific basis for the further development and application of PSA paper.展开更多
Polysulfonamide/zinc oxide(PSA/ZnO) nanocomposite films with w(ZnO)=0.5% were prepared by in-situ polymerization based on 4,4′-diaminodiphenylsulfone and terephthaloyl chloride in the common solvent N,N-Dimethylaceta...Polysulfonamide/zinc oxide(PSA/ZnO) nanocomposite films with w(ZnO)=0.5% were prepared by in-situ polymerization based on 4,4′-diaminodiphenylsulfone and terephthaloyl chloride in the common solvent N,N-Dimethylacetamide(DMAc). Atomic force microscopy (AFM) was employed to observe the microstructure of the composite film. The thermal property was investigated by TGA and mechanical property was characterized by DXLL-1000 electromechanical material testing machine. The results showed that the breaking strength of the film containing 0.5% ZnO was great enhanced. The average size of ZnO particles was below 100 nm. The introduction of ZnO as nano filler in PSA react as UV shield effect and make the composite mechanical property improved.展开更多
A series of polysulfonamide （PSA）/TiO 2 modifier nano-composite films were successfully prepared by in-situ polymerization at a low temperature based on 4, 4-diaminodiphenylsulfone and terephthaloyl chloride in the ...A series of polysulfonamide （PSA）/TiO 2 modifier nano-composite films were successfully prepared by in-situ polymerization at a low temperature based on 4, 4-diaminodiphenylsulfone and terephthaloyl chloride in the common solvent N, N-dimethylacetamide （DMAc）. It was shown that the nano particles were well dispersed in the polymer substrate. Mean-while, PSA/TiO 2 /modifier composites exhibited good UV-resistant properties and mechanical properties. In addition, the composites’ heat stability improved. These prepared composites are promising in preparing spinning solution and might have potential application in heat-resistant fiber.展开更多
Developing an effective and mechanically durable biomimetic membrane for the separation of highly emulsified aqueous oil is significant but challenging owing to its low water flux and serious membrane fouling.In this ...Developing an effective and mechanically durable biomimetic membrane for the separation of highly emulsified aqueous oil is significant but challenging owing to its low water flux and serious membrane fouling.In this work,a biomimetic membrane with superhydrophobicity and superoleophilicity was rationally developed via co-electrospinning of polysulfonamide/polyacrylonitrile(PSA/PAN)emulsion solution,followed by decorating of a-Fe2 O_(3) nanowire onto the membrane surface to create membrane roughness,and grafting of 1 H,1 H,2 H,2 H-perfluorododecyltrichlorosilane(FTCS)to lower membrane surface free energy.Benefiting from the nanowire-wrapped rough membrane structure and the low surface free energy FTCS,the resultant membrane showed superhydrophobicity with a high water contact angle(WCA)of 156°,superoleophilicity with a low oil contact angle(OCA)of 0°,which can separate the highly emulsified aqueous oil with an ultrahigh permeation flux over 7000 L m2 h-1 and high separation efficiency of about 99%.Significantly,the biomimetic membrane also displayed robust stability for long-te rm separation owing to its adva ntage of antifouling property,showing great potential applications in large-scale aqueous oil treatment.展开更多
基金supported by the International Joint Research Center for Biomass Chemistry and Materials, Shaanxi International Science and Technology Cooperation Base (2018GHJD-19)the Key Scientific Research Plan (Key Laboratory) of Shaanxi Provincial Education Department (No.17JS016)by the Natural Science Basic Research Plan, of Shaanxi Province, China (Grant No. 2017JQ2019)
文摘Three-dimensional porous paper was prepared by using polysulfonamide (PSA) fiber and pulp as the raw materials. The effect of PSA fiber to pulp ratios on the mechanical strength and adsorption properties (using methyl orange and rhodamine B dyes in their aqueous phase) of the paper were studied. The results showed that the tensile strength and elongation characteristics decreased as the PSA fiber to pulp ratio increased, while the tear strength increased. PSA paper showed good adsorption performance for both methyl orange and rhodamine B, with the adsorption process conforming to the pseudo-second-order and Langmuir isotherm models, indicating monolayer chemical adsorption. The study has provided an improved theoretical and scientific basis for the further development and application of PSA paper.
基金Education Commission of Shanghai (No04AB19)Science and Technology Commission of Shanghai Municipal Government(Nano Founds No 0452NM051)
文摘Polysulfonamide/zinc oxide(PSA/ZnO) nanocomposite films with w(ZnO)=0.5% were prepared by in-situ polymerization based on 4,4′-diaminodiphenylsulfone and terephthaloyl chloride in the common solvent N,N-Dimethylacetamide(DMAc). Atomic force microscopy (AFM) was employed to observe the microstructure of the composite film. The thermal property was investigated by TGA and mechanical property was characterized by DXLL-1000 electromechanical material testing machine. The results showed that the breaking strength of the film containing 0.5% ZnO was great enhanced. The average size of ZnO particles was below 100 nm. The introduction of ZnO as nano filler in PSA react as UV shield effect and make the composite mechanical property improved.
基金Project supported by the Shanghai Leading Academic Discipline Project (Grant No.s30107)the Science and Technology Commission of Shanghai Municipality (Grant No.0852nm00600)
文摘A series of polysulfonamide （PSA）/TiO 2 modifier nano-composite films were successfully prepared by in-situ polymerization at a low temperature based on 4, 4-diaminodiphenylsulfone and terephthaloyl chloride in the common solvent N, N-dimethylacetamide （DMAc）. It was shown that the nano particles were well dispersed in the polymer substrate. Mean-while, PSA/TiO 2 /modifier composites exhibited good UV-resistant properties and mechanical properties. In addition, the composites’ heat stability improved. These prepared composites are promising in preparing spinning solution and might have potential application in heat-resistant fiber.
基金the National Natural Science Foundation of China(No.51873047)the Fundamental Research Funds for the Central Unive rsities(No.30919011266)+1 种基金the Key Laboratory of Low-Carbon Conversion Science&Engineering,Shanghai Advanced Research Institute,Chinese Academy of Sciences(No.KLLCCSE-201906)the Open Founds for LargeScale Instruments and Equipment of Nanjing University of Science and Technology。
文摘Developing an effective and mechanically durable biomimetic membrane for the separation of highly emulsified aqueous oil is significant but challenging owing to its low water flux and serious membrane fouling.In this work,a biomimetic membrane with superhydrophobicity and superoleophilicity was rationally developed via co-electrospinning of polysulfonamide/polyacrylonitrile(PSA/PAN)emulsion solution,followed by decorating of a-Fe2 O_(3) nanowire onto the membrane surface to create membrane roughness,and grafting of 1 H,1 H,2 H,2 H-perfluorododecyltrichlorosilane(FTCS)to lower membrane surface free energy.Benefiting from the nanowire-wrapped rough membrane structure and the low surface free energy FTCS,the resultant membrane showed superhydrophobicity with a high water contact angle(WCA)of 156°,superoleophilicity with a low oil contact angle(OCA)of 0°,which can separate the highly emulsified aqueous oil with an ultrahigh permeation flux over 7000 L m2 h-1 and high separation efficiency of about 99%.Significantly,the biomimetic membrane also displayed robust stability for long-te rm separation owing to its adva ntage of antifouling property,showing great potential applications in large-scale aqueous oil treatment.
