摘要
以磺化聚醚醚酮(SPEEK)为原材料,制备自发式气体调节膜。利用红外光谱、扫描电镜等手段表征PEEK分子改性前后结构的变化。通过一系列测试手段研究磺化度(DS)对气体调节膜溶解性、吸水性和透气透湿性的影响规律。结果表明:磺酸基团成功接入PEEK分子主链,提高了材料的溶解性和吸水性,极大地降低了膜的生产成本。通过控制SPEEK的磺化度,可以制备对CO2/O2具有不同分离系数的气体调节膜;随着磺化度的增大,膜对CO2的透气性增大,对O2的透气性减小。不同磺化度的SPEEK膜对纯CO2的透过系数范围为1.48×10^-15~1.16×10^-14(cm^3·cm/(cm^2·s·Pa)),对纯O2的透过系数范围为1.54×10^-15~3.00×10^-15(cm^3·cm/(cm^2·s·Pa)),对分离系数αCO2/O2调节范围为0.49~7.53。SPEEK膜的透湿性不受磺化度大小的控制,高磺化度或低磺化度均可以制备出高透湿性的气体调节膜。
Sulfonated poly ether ether ketone(SPEEK)was used to prepare self-breathing gas adjustable membranes,and their structure was analyzed by FT-IR and SEM.The effects of the degree of sulfonation for the solubility,water absorption and permeability of membranes were analyzed by a series of test.The results show that-HSO3 is successfully connected to the main chains of PEEK,which greatly reduces the cost of membrane production and improves the solubility and water absorption.Different gas permeability membranes for CO2/O2 can be prepared by changing the degree of sulfonation of SPEEK.As the degree of sulfonation increases,the gas permeability of the membrane for CO2 increases,and the permeability for O2 decreases.The permeability of membranes with different degrees of sulfonation of SPEEK for pure CO2,O2 and separation coefficient of CO2/O2 is in the range of 1.48×10^-15~1.16×10^-14(cm^3·cm·cm^-2·s^-1·Pa^-1),1.54×10^-15~3.00×10^-15(cm^3·cm·cm^-2·s^-1·Pa-1)and 0.49~7.53,respectively.The moisture permeability of the SPEEK membrane is not controlled by the degree of sulfonation,and a high moisture permeability gas adjustable membrane can be prepared at a high sulfonation degree or low sulfonation degree.
作者
何家鹏
肖凯军
董浩
何其
Jiapeng He;Kaijun Xiao;Hao Dong;Qi He(College of Food Science and Engineerings South China University of Technology,Guangzhou 510640,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2019年第5期20-26,共7页
Polymer Materials Science & Engineering
基金
广东省科技装备动员项目(x2skB2160440)
广东省级科技计划项目(x2skB2160320)
关键词
气体调节膜
磺化聚醚醚酮
磺化度
透气性
gas adjustable membrane
sulfonated poly ether ether ketone
degree of sulfonation
permeability
