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

2016 Global Conference on Polymer and Composite Materials

材料科学;化学

Yang, Y.^1 ; Wang, X.^1 ; Hsiao, B.S.^2

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

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

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/137/1/012047/pdf
DOI  :  10.1088/1757-899X/137/1/012047

学科分类：材料科学（综合）

来源: IOP

【 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).