文献类型：期刊文献

英文题名：Polyamide Membranes with Net-Like Nanostructures Induced by Different Charged MOFs for Elevated Nanofiltration

作者：Ji, Chenhao[1];Xue, Shuangmei[1];Tang, Yong-Jian[1];Ma, Xiao-Hua[1];Xu, Zhen-Liang[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Membrane Sci & Engn R&D Lab, Chem Engn Res Ctr, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：2

期号：2

起止页码：585

外文期刊名：ACS APPLIED POLYMER MATERIALS

收录：;EI(收录号：20212310466820);WOS:【SCI-EXPANDED(收录号:WOS:000514258700051)】；

基金：The authors are thankful for the financial support received from the National Science and Technology Support Project of China (2014BAB07B01 and 201SBAB09B01) and the Consulting Program of the Chinese Academy of Engineering (2017-XZ-08-04-02).

语种：英文

外文关键词：nanofiltration membrane preparation; UiO-66; interfacial polymerization; nanostructure; thin-film composite

摘要：Fabricating nanostructured and nanomaterial enhanced polyamide (PA) selective layer are the trend for next-generation thin-film composite (TFC) membranes for elevated performance. However, the mechanism of how nanomaterials affect the formation of a PA layer remains unclear. Here, we synthesized a series of UiO-66 metal-organic frameworks (MOFs) with different particle zeta-potentials and incorporated these MOFs in either aqueous or organic phase for interfacial polymerization. PA layers with different morphology, surface chemistry and formation mechanism are obtained in the presence of MOFs with varied zeta-potentials. Doping UiO-66 with neutral surface charge in the aqueous phase and UiO-66 with highly positive charge in the organic phase will both lead to the formation of net-like nanostructure. These nanostructures endow the thin-film nanocomposite (TFN) membranes with pure water flux up to 58.5 L m(-2) h(-1) at 0.6 MPa and Na2SO4 rejection of 99.6%, which is similar to-67% higher than the TFN membrane with a nodular morphology. We believe this work establishes a good understanding for facile fabrication of high-performance TFN membranes with more favorable nanostructures.