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A novel method to prepare hydrophobic poly(tetrafluoroethylene) membrane, and its properties

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Abstract

Hydrophobic poly(tetrafluoroethylene) (PTFE) flat-sheet membranes were prepared by a novel method with polyvinyl alcohol (PVA) as membrane carrier. Factors affecting PTFE membrane pore structure and mechanical properties such as sintering temperature, sintering state, and the simulate model were investigated. Results show that it was better to form pore structure at the first sintering stage. Morphologies of membranes were observed by scanning electronic microscopy (SEM). Membrane microvoids among the fibrils net nodes were loose by fixed setting sintering while compact by relax setting sintering. Chemical constitution and thermal stability of PTFE/PVA blend membrane after sintering (m-PTFE) and PTFE membrane were investigated, and no obvious difference in chemical constitution could be found between m-PTFE and PTFE membranes. The m-PTFE membranes obtained are still strong hydrophobic by the determination of contact angle to water.

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Acknowledgements

The author gratefully acknowledges the financial support of the national high technology research development plan of china: the key technology of producing polyolefin high performance microfiltration and ultrafiltration hollow fiber membrane (“863” fund program No. 2007AA030304), and the National Natural Science Foundation of China (Grant No. 51073120).

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Authors and Affiliations

  1. The Key Laboratory of Hollow Fiber Membrane Material and Process of Ministry of Education, Department of Materials Science & Engineering, Tianjin Polytechnic University, Tianjin, 300160, China

    Qing-lin Huang, Chang-fa Xiao & Xiao-yu Hu

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  1. Qing-lin Huang
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  2. Chang-fa Xiao
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  3. Xiao-yu Hu
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Correspondence to Chang-fa Xiao.

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Huang, Ql., Xiao, Cf. & Hu, Xy. A novel method to prepare hydrophobic poly(tetrafluoroethylene) membrane, and its properties. J Mater Sci 45, 6569–6573 (2010). https://doi.org/10.1007/s10853-010-4475-7

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  • DOI: https://doi.org/10.1007/s10853-010-4475-7

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