Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2013, Vol. 24 ›› Issue (6): 060205 doi: 10.13538/j.1001-8042/nst.2013.06.003

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Morphology of irradiated PMMA membranes prepared by phase inversion with supercritical CO2

TANG Zhongfeng 1,4,* CHEN Youshuang 2 QIU Guangnan 3 TONG Bin 4#br# LI Hua 1,5 TANG Xiaoxing 1 KONG Xiangbo 1   

  1. 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China
    3Shenzhen Changyuan Electronics Materials Co., Ltd, Shenzhen 518057, China
    4Key Lab of Nuclear Radiation and Nuclear Energy Technology, Chinese Academy of Sciences, Shanghai 201800, China
  • Contact: TANG Zhongfeng E-mail:tangzhongfeng@sinap.ac.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China (Nos.11005148, and 11079048 ), Science and Technology Commission of Shanghai Municipality (No.11JC1414900) and 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).

TANG Zhongfeng, CHEN Youshuang, QIU Guangnan, TONG Bin. Morphology of irradiated PMMA membranes prepared by phase inversion with supercritical CO2.Nuclear Science and Techniques, 2013, 24(6): 060205     doi: 10.13538/j.1001-8042/nst.2013.06.003

Abstract:

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 10 μm 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 scCO2 synergistic effect.

Key words: PMMA, Irradiation, Supercritical CO2, Micropore, Morphology