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›› 2009, Vol. 9 ›› Issue (2): 381-386.

• 材料工程专栏 • Previous Articles     Next Articles

Preparation of Silane Modified PDMS/Silicalite Hybrid Membrane and Its Pervaporation for Dilute Ethanol-Water Solution

YI Shou-liang SU Yi ZHOU Hao-li CHEN Xiang-rong SU Zhi-guo WAN Yin-hua;   

  1. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences State Key Laboratory of Biochemical Engineering, Institute of Process Engineering State Key Laboratory of Biochemical Engineering, Institute of Process Engineering State Key Laboratory of Biochemical Engineering, Institute of Process Engineering State Key Lab. Biochem. Eng., Inst. Process Eng., Chinese Academy of Sciences State Key Lab. Biochem. Eng., Inst. Process Eng., Chinese Academy of Sciences
  • Received:2008-11-21 Revised:1900-01-01 Online:2009-04-20 Published:2009-04-20
  • Contact: YI Shou-liang

有机硅烷改性PDMS/Silicalite渗透汽化杂化膜制备及其分离性能

伊守亮 苏仪 周浩力 陈向荣 苏志国 万印华   

  1. 中国科学院过程工程研究所生化工程国家重点实验室 中国科学院过程工程研究所生化工程国家重点实验室 中国科学院过程工程研究所生化工程国家重点实验室 中国科学院过程工程研究所生化工程国家重点实验室 中国科学院过程工程研究所生化工程国家重点实验室 中国科学院过程工程研究所生化工程国家重点实验室
  • 通讯作者: 伊守亮

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Abstract: With 3-aminopropyltrIethoxysilane as a coupling and surface modification agent for Silicalite-1 nanoparticles, polydimethylsiloxane (PDMS)-Silicalite filled pervaporation membranes were prepared. The modification effect of Silicalite and thermal resistant performance of the hybrid membrane were investigated by FT-IR and TGA. The effects of feed concentration, feed temperature, feed flow rate and downstream vacuum degree on the pervaporation performance of dilute ethanol/water solutions were also examined. The results showed that compared with pure PDMS and unmodified hybrid membranes, the selectivity of silane modified hybrid membrane could be improved by 136% and 45%. With the increasing of ethanol concentration in the feed from 5% to 69%, the membrane selectivity was decreased remarkably. Nevertheless, other operation parameters had a little effect on membrane selectivity.

Key words: polydimethylsiloxane, pervaporation, Silicalite-1, hrbrid membrane, silane coupling agent, modification

摘要： 采用硅烷偶联剂对全硅沸石Silicalite-1进行表面改性，以聚二甲基硅氧烷(PDMS)为基体，制备了渗透汽化PDMS/Silicalite杂化膜. 用FT-IR, TGA等对改性的效果和杂化膜的热稳定性能进行了表征，并以低浓度乙醇/水体系为研究对象，以渗透通量和分离因子为评价指标，考察了料液组成、进料温度、循环流速、膜下游侧真空度等因素对改性杂化膜分离性能的影响. 结果表明，硅烷改性沸石所制杂化膜对低浓度乙醇/水体系的分离因子比空白膜和未改性杂化膜分别提高136%和45%. 随料液中乙醇浓度从5%增加到69%，膜分离因子从22降低到7，而其他因素对膜的选择性影响较小.

关键词: 聚二甲基硅氧烷, 渗透汽化, Silicalite-1, 杂化膜, 硅烷偶联剂, 改性

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