Preparation of thin film nanofibrous composite NF membrane based on EDC/NHS modified PAN-AA nanofibrous substrate

[摘要] A novel kind of thin-film nanofibrous composite (TFNC) nanofiltration (NF) membranes consisting of a polyamide (PA) barrier layer were successfully fabricated by interfacial polymerization (IFP) based on electrospun double-layer nanofibrous substrates, which have an ultrathin poly (acrylonitrile-co-acrylic acid) (PAN-AA) nanofibrous layer as top layer and a thicker polyacrylonitrile (PAN) nanofiber layer as bottom porous support layer. Immersing PAN/PAN-AA nanofibrous substrates into 1-ethyl-(3-3-dimethylaminopropyl) carbodiimide hydrochloride/N-hydroxysuccinimide (EDC/NHS) aqueous solution and piperazine (PIP) aqueous solution (0.20 wt%) sequentially for a period of time, the carboxyl groups on PAN-AA nanofibers were activated by carbodiimide and then reacted with the amide groups. The as prepared composite membrane has an integrated structure with high rejection rate (98.0%); high permeate flux (40.4 L/m2h) for MgSO4aqueous solution (2 g/L).

[发布机构] State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, No. 2999 Renmin Road (N), Songjiang District, Shanghai; 201620, China^1;Department of Chemistry, Stony Brook University, Stony Brook; NY; 11794-3400, United States^2

[效力级别] 化学 [学科分类] 材料科学（综合）

[关键词] Carbodiimide hydrochlorides;Carboxyl groups;Integrated structure;Interfacial polymerization;Nanofibrous substrates;Poly(acrylonitrile-co-acrylic acid);Polyacrylonitrile (PAN);Thin film nanofibrous composites