文献类型：期刊文献

英文题名：Exploration of Permeation Resistance Change of the Polyamide Nanofiltration Membrane during Heat Curing by Using Organic Molecules as Functional Fillers

作者：Wu, Liu-Kun[1];Zhu, Qiu-Yu[1];Li, Lan-Qian[1];Xu, Zhen-Liang[1];Xue, Shuang-Mei[2];Ji, Chen-Hao[2];Tang, Chuyang Y.[3];Zhuang, Liwei[1];Tang, Yong-Jian[1]

机构：[1]East China Univ Sci & Technol, Chem Engn Res Ctr, Sch Chem Engn,Membrane Sci & Engn R&D Lab, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Peoples R China;[3]Univ Hong Kong, Dept Civil Engn, HW619B, Hong Kong, Peoples R China

年份：2022

卷号：61

期号：43

起止页码：15980

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20224413039640);WOS:【SCI-EXPANDED(收录号:WOS:000879480800001)】；

基金：? ACKNOWLEDGMENTS The authors are thankful for the funding support provided by the National Natural Science Foundation of China (21808060) .

语种：英文

外文关键词：Amides - Composite membranes - Gas permeable membranes - Glycerol - Industrial research - Molecules - Nanofiltration - Nanofiltration membranes - Permeation - Shrinkage

摘要：Recent studies show that heat curing has a great influence on the performance of polyamide nanofiltration (NF) membranes. In this work, nascent polypiperazine-amide NF membranes were pretreated before heat curing to reveal the change in permeation resistance caused by heat curing. Aqueous solutions containing a series of organic molecules (glycerol, raffinose, alpha-cyclodextrin, and polyvinylpyrrolidone) with different molecular weights were used to treat the polypiperazine-amide NF membrane via different immersion approaches before heat curing. These organic molecules play a role in filling and alleviating the collapse and shrinkage of the membrane structure during heat curing and in further protecting the membrane from permeance loss. Furthermore, the organic molecules were used to regulate the shrinkage of the membrane structure in different immersion approaches to clarify the proportion of permeability change attributed to the shrinkage in different membrane layers during heat curing. Through a resistances-in-series model calculation, the permeation resistance of the polyamide layer was found to have decreased from 0.0523 to 0.0329 h bar m-1 after being pretreated with glycerol and that of the polyether sulfone substrate decreased from 0.1651 to 0.0033 h bar m-1. This work proves that protecting the ultrafiltration membrane from drying during heat curing is the key to maintaining the performance of the thin-film composite membrane. This research is instructive for a better understanding of the permeance loss of the NF membrane during heat curing and the optimization of the heat treatment procedure in industrial processes.