渗透蒸发过程中pH触发的膜

Angelini Alessandro, Fodor Csaba, Yave Wilfredo, Leva Luigi, Car Anja, Meier Wolfgang

Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR1096, 4002 Basel, Basel-Stadt, Switzerland.

DeltaMem AG, Rothausstrasse 61, 4132 Muttenz, Basel-Land, Switzerland.

ACS Omega. 2018 Dec 31;3(12):18950-18957. doi: 10.1021/acsomega.8b03155.

Dehydration of binary methyl acetate-water mixtures under neutral, acidic, and basic conditions was carried out by using PERVAP composite membranes based on polyvinyl alcohol and poly(1-vinylpyrrolidone--2-(dimethylamino)ethyl methacrylate) P(VP--DMAEMA). The effects of an acid (HCl) and a base (NaOH) on the separation performance of the membrane during the pervaporation process were investigated. The pH-responsive nature of membranes has been confirmed by swelling tests and analysis of the chemical structure of polymeric membranes. In addition, a mechanism of ring-opening of VP units is proposed and correlated to the changes of membrane separation performance.

使用基于聚乙烯醇和聚（1-乙烯基吡咯烷酮-甲基丙烯酸2-（二甲氨基）乙酯）P（VP-DMAEMA）的渗透汽化复合膜，在中性、酸性和碱性条件下对二元乙酸甲酯-水混合物进行脱水。研究了酸（HCl）和碱（NaOH）对渗透汽化过程中膜分离性能的影响。通过溶胀试验和聚合物膜化学结构分析证实了膜的pH响应特性。此外，提出了VP单元的开环机理，并将其与膜分离性能的变化相关联。