Modification of porous poly(ether sulfone) membranes by low‐temperature CO2‐plasma treatment
Modification of porous poly(ether sulfone) membranes by low‐temperature CO2‐plasma treatment
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DOI：
10.1002/polb.10308
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发表时间：
2002-11
期刊：
影响因子：
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通讯作者：
D. Wavhal;E. R. Fisher
中科院分区：
文献类型：
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作者：
D. Wavhal;E. R. Fisher
A general method of modifying the entire cross section of porous poly(ether sulfone) membranes with a low-temperature CO 2 -plasma treatment is reported. Both surfaces of the membranes are highly hydrophilic, with a water drop on the surface disappearing in less than 1 s, even 6 months after plasma treatment. This high hydrophilicity of both membrane surfaces results from the incorporation of hydrophilic functionalities, as evidenced by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The incorporation of these hydrophilic functionalities takes place primarily during plasma treatment, with some incorporation of atmospheric oxygen and nitrogen immediately upon exposure to air. Scanning electron microscopy shows that the membrane surface is covered by a thin, white layer that is likely the result of etching and redeposition of sputtered surface fragments. An increase in the water bubble point and glass-transition temperature is also observed for CO 2 -plasmatreated membranes.
