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題名 | Cyclonic Plasma Activation on Microporous Poly(vinylidene Fluoride) Membranes for Improving Surface Hydrophilicity= |
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作者 | Juang, Ruey-shin; Huang, Chun; Jheng, Hsu-yi; Li, Chun; Wu, Li-yu; Chang, Yi-jan; |
期刊 | Journal of the Taiwan Institute of Chemical Engineers |
出版日期 | 20150900 |
卷期 | 54 2015.09[民104.09] |
頁次 | 頁76-82 |
分類號 | 361.4 |
語文 | eng |
關鍵詞 | Surface hydrophilicity; Microporous PVDF membrane; Cyclonic plasma; Microfiltration flux; |
英文摘要 | To improve microfiltration (MF) flux, microporous poly(vinylidenefluoride) (PVDF) membranes were modified by cyclonic atmospheric-pressure plasma (CAPP). The surface hydrophilicity change of a PVDF membrane was monitored based on static contact angle measurements. The PVDF membrane surface became highly hydrophilic when exposed to CAPP for only 30 s. A significant increase in the surface energy of PVDF membranes attributable to the CASING (crosslinking via activated species of inert gases) effect was observed. Optical emission spectroscopy (OES) was used to determine various chemical species of CAPP processing. X-ray photoelectron spectroscopy (XPS) and confocal laser scanning microscopy (CLSM) were employed to characterize the chemical and morphological changes on the treated PVDF membrane surface. The XPS analysis showed considerably higher surface concentrations of oxygen functional groups on the CAPP-functionalized PVDF membrane surface compared to the untreated one. The membrane surface hydrophilicity was increased by plasma treatment, leading to an increase in filtration flux. The present results show that CAPP is an efficient tool that can be used to enhance the surface hydrophilicity of PVDF membranes. |
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