石油化工高等学校学报2024，Vol.37Issue(2)：66-72,7.DOI:10.12422/j.issn.1006-396X.2024.02.009
基于冠醚改性脱乙酰甲壳素制备燃料电池用阴离子导电膜
Preparation of Anionic Conductive Membrane for Fuel Cells Based on Crown Ether Modified Deacetylated Chitin
摘要
Abstract
Under alkaline conditions,the aldehyde group is introduced into dibenzo-18-crown-6(DB18C6)with the help of chloroform(CHCl3)to prepare dimethyl dibenzo-18-crown-6(DDB18C6).Then,using DDB18C6 and soluble deacetylated chitin(CTS)as raw materials,Schiff reaction was used to synthesize a grafted crown ether CTS membrane with an increasing mass fraction of small molecule crown ethers,which was named Ca-CTS membrane(a=m(DDB18C6)/m(Ca-CTS membrane)).The Ca-CTS membrane is ion exchanged in alkali solution.The Ca-CTS membrane absorbs K+ through the oxygen hole structure,and then the Ca-CTSK membrane is prepared.Eeach stage the sample membrane was subjected to structural characterization and performance testing.The results show that with the increase of the crown ether grafting degree,the thermal stability of CTS can be improved;when a=0.20,the grafting degree of C0.20-CTSK membrane can reach 43.91%,the water absorption rate can reach 168.6%,the IEC value is 1.38 mmol/g.At a temperature of 70℃,the conductivity of C0.20-CTSK membrane can reach 46.8 mS/cm;the introduction of grafting of crown ether improves the alkali resistance stability of this series of membranes.After the Ca-CTSK series membranes are soaked in 6 mol/L KOH solution for 480 hours,the conductivity decreases only 4.0%.关键词
脱乙酰甲壳素/二甲酰基二苯并-18-冠-6/阴离子导电膜/燃料电池/冠醚Key words
Chitosan/Dimethyldibenzo-18-crown-6/Anionic conductive film/Fuel cell/Crown ether分类
化学化工引用本文复制引用
年海歌,郑旭莹,高慧,辛海,王吉林..基于冠醚改性脱乙酰甲壳素制备燃料电池用阴离子导电膜[J].石油化工高等学校学报,2024,37(2):66-72,7.基金项目
国家大学生创新创业训练计划项目(202210148020) （202210148020）
辽宁省应用基础研究计划项目(2023JH2/101300217). （2023JH2/101300217）
