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化工进展  2015 

硅溶胶/PDMS渗透汽化膜的制备及分离水中正丁醇

DOI: 10.16085/j.issn.1000-6613.2015.10.028, PP. 3700-3705

Keywords: ,硅溶胶,乳液,超支化聚硅氧烷,渗透汽化

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Abstract:

基于乳液成膜技术,以硅溶胶为填充剂,制备了硅溶胶聚二甲基硅氧烷/PDMS杂化膜,用于分离水中正丁醇。对膜进行了FI-IR分析及形貌、热稳定性、接触角和力学性能表征;研究了硅溶胶的加入对膜渗透汽化性能的影响。结果表明,硅溶胶与PDMS基质结合良好,没有明显相界面,膜的渗透汽化性能明显提高。在料液质量分数为1%、操作温度为40℃时,随着膜中硅溶胶含量的增加,膜的分离选择性和对丁醇的渗透性均呈现先升高后下降的趋势;在硅溶胶含量为3.75%时,分离选择性高达9.03;在硅溶胶含量为7.5%时,膜对丁醇的渗透性高达2.9×106Barrer。

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