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首页> 外文期刊>Applied Surface Science >Improving the hydrophilicity of poly(vinylidene fluoride) porous membranes by electron beam initiated surface grafting of AA/SSS binary monomers
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Improving the hydrophilicity of poly(vinylidene fluoride) porous membranes by electron beam initiated surface grafting of AA/SSS binary monomers

机译：通过电子束引发的AA / SSS二元单体表面接枝提高聚偏二氟乙烯多孔膜的亲水性

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Poly(vinylidene fluoride) (PVDF) membranes were pre-irradiated by electron beam in vacuum, and then the hydrophilic sulfonate groups were introduced by the single step grafting method with binary monomer solution of acrylic acid (AA) and sodium 4-styrenesulfonate (SSS). The effect of binary monomer ratio and pH of reaction solution on the degree of grafting was investigated. The surface chemical change was characterized by Fourier transform infrared attenuated total reflection spectroscopy (FT-IR-ATR) and X-ray photoelectron spectroscopy (XPS). Morphological changes on the membrane surface were characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The surface hydrophilicity of the modified membrane was characterized through water contact angle measurement. It was found that the water contact angle of the membrane surface decreased significantly when compared with the original one, indicating the improvement of the surface hydrophilicity.
机译：用真空电子束对聚偏二氟乙烯（PVDF）膜进行预辐照，然后用丙烯酸（AA）和4-苯乙烯磺酸钠（SSS）的二元单体溶液通过一步接枝法引入亲水性磺酸盐基团。 ）。研究了二元单体配比和反应溶液pH值对接枝度的影响。表面化学变化通过傅立叶变换红外衰减全反射光谱仪（FT-IR-ATR）和X射线光电子能谱仪（XPS）表征。膜表面的形态变化通过扫描电子显微镜（SEM）和原子力显微镜（AFM）表征。通过水接触角测量来表征改性膜的表面亲水性。发现与原始膜相比，膜表面的水接触角显着降低，表明表面亲水性得到改善。

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