膜科学与技术

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The effects of composition on mass transfer and morphology of PDMS-b-PPO membranes

Authors： Liu Wei, JiShulan, Gao Jing, Zhang Wei, Qin Zhenping

Units： College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, P. R. China

KeyWords： polydimethylsiloxane-block-polyphenylene oxidecopolymer (PDMS-b-PPO); pervaporation; ethanol/water; micro-phase separation; solubility-diffusion

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2013,33(6):32-37

Abstract：

A series of polydimethylsiloxane-block-polyphenylene oxide(PDMS-b-PPO) copolymers with different composition of “hard-soft” segments were synthesized through the hydroxyl-amino condensation reaction. The PDMS content was calculated based on the 1H-NMR result of PDMS-b-PPO copolymers. The PDMS-b-PPO membranes were prepared via a solvent evaporation method and applied in the separation of ethanol/water mixture by pervaporation, the effects of composition on mass transfer and morphology of PDMS-b-PPO membranes were studied. The solubility and diffusion properties of ethanol and water in PDMS-b-PPO membranes were tested, and the micro-phase separation morphologies were observed by AFM and EDS. The results showed that the membranes preferentially absorbed ethanol, meanwhile,withthe increase of PDMS content in PDMS-b-PPO membrane, the diffusion ability of both ethanol and water in membranes was enhanced, andfurthermore, the ethanol increased more rapidly than the water did.

Funds：

国家自然科学基金资助项目（20876003，21176007）

AuthorIntro：

刘威（1986-），男，湖北省洪湖市人，博士生，主用从事膜材料开发与应用研究. 通讯联系人，纪树兰（1953- ），女，教授，博士生导师，电话：（010）67391614

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