界面聚合
膜
单体
化学
聚酰胺
反渗透
高分子化学
聚合
氯化物
化学工程
纳滤
水溶液
色谱法
聚合物
有机化学
生物化学
工程类
作者
Xiaojuan Wang,Kuisuo Yang,Huacheng Xu,Yijun Huang,Congjie Gao,Xueli Gao
出处
期刊:Desalination
[Elsevier]
日期:2023-11-01
卷期号:565: 116880-116880
被引量:1
标识
DOI:10.1016/j.desal.2023.116880
摘要
Novel acyl chloride monomer 5-(1-pyrrolidinyl)-1,3-benzenedicarbonyl dichloride (PIPC) featuring a rigid pyrrolidinyl group was proposed as an organic phase monomer to fabricate reverse osmosis (RO) membranes possessing exceptional water permeability and NaCl rejection via a two-step interfacial polymerization method. First, m-phenylenediamine (MPD) in the aqueous phase solution polymerized with PIPC in the first organic phase solution to form the much looser polyamide. After that the remaining MPD continued to diffuse to polymerize with trimesoyl chloride in the second organic phase solution to form the denser polyamide. The pyrrolidinyl group had steric hindrance effects and formed hydrogen bond with MPD, leading to decreasing the thickness significantly and increasing surface roughness of the separating layer. When the PIPC amount was 0.08 wt%, the PIPC-based RO membrane displayed optimal permselectivity with water flux increasing by 84.20 % compared to the original RO membrane (from 20.38 L·m−2·h−1 to 37.54 L·m−2·h−1) whereas retaining high NaCl rejection with 98.59 %. The PIPC-based RO membrane exhibited steady water flux and NaCl rejection within 120 h of filtration, as well as improved antifouling performance. Thus, preparation of the highly permeable RO membrane could be rationally achieved by the novel acyl chloride monomer with a rigid pyrrolidinyl group.
科研通智能强力驱动
Strongly Powered by AbleSci AI