摘要
采用溶液浇铸法制备了厚度为33～112μm的聚[1-（4-三甲基硅基）苯基-2-苯乙炔]（PTMS—DPA）膜，研究了膜厚度、储存温度和储存气氛对其气体渗透性能的影响。结果表明，物理老化会导致PTMSDPA膜的气体渗透系数下降，经甲醇浸泡处理后，气体渗透系数可恢复到初始值。升高储存温度，渗透系数的下降速率增大。气体渗透系数的下降程度随膜厚度的减小而增大。储存气氛不影响聚合物膜的气体渗透性能的变化。溶解度系数基本不变，扩散系数的下降导致气体渗透系数下降。
Poly [ 1-（4-trimethylsilyl） phenyl-2-phenylacetylene ] （ PTMSDPA ） membranes were prepared by solution-casting method with thickness ranging from 33 μm to 112 μm to study the effect of aging on their gas permeability. The gas permeability of these membranes decreased during storing due to physical aging, which could be restored by immersing the membrane in methanol. The decreasing rate of gas permeability accelerated at high storing temperature, and the reduction of gas permeability became greater as the thickness of the membrane decreased. The storing atmosphere did not affect the gas permeability changing tendency of the membrane. The decrease of gas permeability was largely due to the decrease of diffusivity coefficient （D） , while the solubility coefficient （S） did not change during storage.
出处
《化学工业与工程》
CAS
2014年第1期53-56,共4页
Chemical Industry and Engineering
基金
教育部留学回国人员科研启动基金[教外司留(2010)1174]资助项目
关键词
取代聚炔
气体分离膜
物理老化
substituted polyacetylene
gas separation membrane
physical aging
