文献类型：期刊文献

英文题名：Microcellular foaming of polysulfones in supercritical CO2 and the effect of co-blowing agent

作者：Hu, Dong-dong[1];Gu, Yong[1];Liu, Tao[1];Zhao, Ling[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[2]Xinjiang Univ, Coll Chem & Chem Engn, Urumqi 830046, Peoples R China

年份：2018

卷号：140

起止页码：21

外文期刊名：JOURNAL OF SUPERCRITICAL FLUIDS

收录：;EI(收录号：20182405302298);WOS:【SCI-EXPANDED(收录号:WOS:000446284200003)】；

基金：The authors are grateful to National Natural Science Foundation of China (21706063, 21676092), National Key R&D Program of China (2016YFB0302200), and the Fundamental Research Funds for the Central Universities (22221714005).

语种：英文

外文关键词：polysulfones; supercritical carbon dioxide; foaming; co-blowing agent

摘要：The microcellular foaming of two kinds of polysulfones, polyphenylsulfone (PPSU) and polysulfone (PSU), were investigated in supercritical CO2. The expansion ratio, which ranges from 1.10-2.45 for PPSU and 1.10-3.72 for PSU obtained under different conditions, is not sufficient due to the limited solubility of CO2. To improve the porosity of foams, the effect of co-blowing agents on foaming was studied by molecular modeling and foaming experiments. Ethanol has a more favorable interaction with CO2, followed by water, acetone and ethyl acetate. Additionally, ethanol significantly increases the interaction of CO2 with polymer chains The expansion ratio of foams has an evident increase, and the foaming temperature window expands upon the addition of co-blowing agents. Consistently, the addition of ethanol has the highest expansion ratio, 5.02 for PPSU and 6.54 for PSU. Meanwhile, it broadens the foaming temperature dramatically, decreasing the value by 50 degrees C for PPSU and 70 degrees C for PSU.