Morphology of irradiated PMMA membranes prepared by phase inversion with supercritical CO_2

查看全文 作　　者：TANG [1,2]Zhongfeng;CHEN [3]Youshuang;QIU [4]Guangnan;TONG [2]Bin;LI [1]Hua;TANG [1]Xiaoxing;KONG [1]Xiangbo 机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences;[2]Key Lab of Nuclear Radiation and Nuclear Energy Technology,Chinese Academy of Sciences;[3]College of Biological and Chemical Engineering,Guangxi University of Science and Technology;[4]Shenzhen Changyuan Electronics Materials Co.,Ltd 出　　处：《Nuclear Science and Techniques》索引2013年第24卷第6期,共7页 基　　金：Supported by the National Natural Science Foundation of China(Nos.11005148,and 11079048);Science and Technology Commission of Shanghai Municipality(No.11JC1414900);the Natural Science Foundation of Guangxi University of Technology(No.1166107);Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA01020304);the project of Urban and rural housing construction in Anhui province(No.2012YF-08) 摘　　要：Poly(methyl methacrylate)(PMMA)pellets are irradiated using 60Co gamma-ray in air and successfully formed by hot pressing at constant conditions.The irradiated PMMA membranes are prepared by supercritical carbon dioxide(scCO2)as a physical blowing agent using the pressure quench method.Effects of foaming conditions such as adsorbed dose,saturation temperature,pressure on the morphology and cell size of the microcellular PMMA membranes are investigated in detail.The results showed that the irradiated PMMA membranes possess spherically closed-cell structure with uniform cell size.They have a high cell density compared with virgin PMMA.The cell size uniformity becomes poor at dose lower than 10 kGy,but increases with the dose at dose higher than 10 kGy.The mean cell diameter is less than 10μm and the cell density increases with increasing dose.The average cell size of irradiated PMMA membranes decreases and cell density increases with increased saturation temperature and pressure.The changes in morphology of membranes are attributed to the gamma-ray radiation and scCO2synergistic effect. 关 键 词：PMMA 超临界CO2 制备 聚(甲基丙烯酸甲酯) 超临界二氧化碳 相转化 聚甲基丙烯酸甲酯 膜