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碱处理对具有聚氯乙烯背衬和粘合剂的阴离子交换膜力学性能的影响

Effect of Alkali Treatment on the Mechanical Properties of Anion-Exchange Membranes with a Poly(vinyl Chloride) Backing and Binder.

作者信息

Doi Shoichi, Taniguchi Ikuo, Yasukawa Masahiro, Kakihana Yuriko, Higa Mitsuru

机构信息

Astom Corporation, 1-1 Mikagecho, Syunan, Yamaguchi 745-8648, Japan.

Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan.

出版信息

Membranes (Basel). 2020 Nov 16;10(11):344. doi: 10.3390/membranes10110344.

DOI:10.3390/membranes10110344
PMID:33207567
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7696018/
Abstract

An alkali treatment under various operating conditions is conducted on a commercial anion-exchange membrane containing poly(vinyl chloride) (PVC) as a backing and binder to study the effect of the treatment on the mechanical properties by both Müllen burst and tensile tests. Contrary to our expectations, the Müllen burst pressure and tensile strain at break improved significantly after the alkali treatment in comparison to the pristine membrane and then decreased as the treatment period progressed. A good correlation is observed between the area below the stress-strain curve and burst pressure. To understand the obtained results, the PVC degradates are recovered by Soxhlet extraction and characterized via nuclear magnetic resonance and gel permeation chromatography. It is discovered that the PVC main chains degraded in the alkali solution. We propose a composite model to explain the burst pressure improvement mechanism by the change in the chemical structure of the PVC binder.

摘要

对一种以聚氯乙烯（PVC）为背衬和粘合剂的商用阴离子交换膜在各种操作条件下进行碱处理，通过穆伦爆破试验和拉伸试验研究该处理对机械性能的影响。与我们的预期相反，与原始膜相比，碱处理后穆伦爆破压力和断裂拉伸应变显著提高，然后随着处理时间的延长而降低。在应力-应变曲线下方的面积与爆破压力之间观察到良好的相关性。为了解所获得的结果，通过索氏提取回收PVC降解产物，并通过核磁共振和凝胶渗透色谱进行表征。发现PVC主链在碱溶液中发生了降解。我们提出了一个复合模型来解释由于PVC粘合剂化学结构的变化而导致的爆破压力提高机制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/51b3/7696018/41b9855a4ed6/membranes-10-00344-g016a.jpg
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本文引用的文献

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Alkali Attack on Cation-Exchange Membranes with Polyvinyl Chloride Backing and Binder: Comparison with Anion-Exchange Membranes.碱对带有聚氯乙烯背衬和粘合剂的阳离子交换膜的侵蚀：与阴离子交换膜的比较
Membranes (Basel). 2020 Sep 11;10(9):228. doi: 10.3390/membranes10090228.
2
Alkali Attack on Anion Exchange Membranes with PVC Backing and Binder: II Prediction of Electrical and Mechanical Performances from Simple Optical Analyses.碱对含聚氯乙烯背衬和粘合剂的阴离子交换膜的侵蚀：II 基于简单光学分析对电学和力学性能的预测
Membranes (Basel). 2018 Dec 14;8(4):133. doi: 10.3390/membranes8040133.
食品工业电渗析过程中离子交换膜污染的综述，第2部分：对传输特性和电化学特性的影响、清洗及其后果
Membranes (Basel). 2021 Oct 25;11(11):811. doi: 10.3390/membranes11110811.