期刊
MOLECULES
卷 26, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/molecules26072028
关键词
bipolar membrane; radiation induced asymmetric grafting; phase separation
资金
- QST President's Strategic Grant
A novel type of bipolar membranes (BPMs) was prepared using radiation-induced asymmetric graft polymerization (RIAGP), with a clear CEL/AEL boundary achieved for the first time. However, practical application revealed a thinner CEL compared to AEL, which was addressed by controlling the thicknesses of CEL and AEL through different starting times of the grafting reactions.
We prepared novel bipolar membranes (BPMs) consisting of cation and anion exchange layers (CEL and AEL) using radiation-induced asymmetric graft polymerization (RIAGP). In this technique, graft polymers containing cation and anion exchange groups were introduced into a base film from each side. To create a clear CEL/AEL boundary, grafting reactions were performed from each surface side using two graft monomer solutions, which are immiscible in each other. Sodium p-styrenesulfonate (SSS) and acrylic acid (AA) in water were co-grafted from one side of the base ethylene-co-tetrafluoroethylene film, and chloromethyl styrene (CMS) in xylene was simultaneously grafted from the other side, and then the CMS units were quaternized to afford a BPM. The distinct SSS + AA- and CMS-grafted layers were formed owing to the immiscibility of hydrophilic SSS + AA and hydrophobic CMS monomer solutions. This is the first BPM with a clear CEL/AEL boundary prepared by RIAGP. However, in this BPM, the CEL was considerably thinner than the AEL, which may be a problem in practical applications. Then, by using different starting times of the first SSS+AA and second CMS grafting reactions, the CEL and AEL thicknesses was found to be controlled in RIAGP.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据