文献类型：期刊文献

英文题名：Surface Modification of Polyacrylonitrile Membrane by Chemical Reaction and Physical Coating: Comparison between Static and Pore-Flowing Procedures

作者：Qin, Yang[1];Yang, Hu[1];Xu, Zhenliang[1];Li, Feng[1]

机构：[1]East China Univ Sci & Technol, Chem Engn Res Inst, Membrane Res Ctr, Shanghai 200237, Peoples R China

年份：2018

卷号：3

期号：4

起止页码：4231

外文期刊名：ACS OMEGA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000430200300066)】；

基金：This work is supported by the National Natural Science Foundation of China (no. 21276075) for financial support.

语种：英文

摘要：The influences of static and pore-flowing procedures on the surface modification of a polyacrylonitrile (PAN) ultrafiltration membrane through chemical reaction and physical coating were investigated in detail. For chemical modification by ethanolamine, a membrane modified by the pore-flowing procedure showed a higher flux and different morphology. The reasons were explained by two effects: the pore-flowing resistance to the random thermal motion of PAN at high temperatures and different reaction kinetics related to the reactant concentration profile on the interface between the membrane and reaction solution and the kinetic property of the fluid (driving force and miscibility) and reaction (time and rate). For physical coating modification, a dense and flat layer via a loose and random layer was formed during the poreflowing process and static process, which changed the flux and antifouling property of the membrane. The membrane prepared by dead-end filtration showed the best trade-off between the flux and antifouling property. Overall, the procedure kinetics plays an important role in the optimization of membrane modification.