期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 47, 页码 24328-24338出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.05.004
关键词
Anion exchange membrane; Ether bond; Polyphenylene oxide; Alkaline stability
资金
- National Natural Science Foundation of China [22075031, 51603017]
- Jilin Provincial Science & Technology Department [20200801011GH]
A novel comb-shaped anion exchange membrane based on PPO and DABDA was reported in this study, showing excellent hydrophilic/hydrophobic microphase separation and alkaline stability. The increase in grafting degree led to improvements in water uptake, swelling ratio, conductivity, and mechanical properties of the membranes.
We report a novel comb-shaped anion exchange membrane based on poly (2,6-dimethyl-1,4-phenylene oxide) (PPO) and 4-(dimethylamino)butyraldehyde diethyl acetal (DABDA). The Menshutkin reaction successfully introduced DABDA into the brominated PPO backbone, which was proved through FT-IR and H-1 NMR. The distinct hydrophilic/hydrophobic microphase separation structure observed by transmission electron microscope (TEM). As the increase of grafting degree, so does the water uptake, swelling ratio, hydroxide conductivity and alkaline stability. The membranes also possess good mechanical property with tensile strength from 14.2 to 38.11 MPa. This is due to the increasing number of hydroxide and unique steric hindrance effect caused the higher water uptake and higher dimensional stability. Simultaneously, especially PPO/DABDA-60 in comb-shaped membranes demonstrate an excellent long-term alkali resistance stability. In a 576-h alkali resistance stability test, the retained ionic conductivity of the PPO/DABDA-60 membrane is 96% of the initial value. The PPO/DABDA-60 is a potential candidate material for AEM. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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