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首页> 外文期刊>Journal of Applied Polymer Science >Surface functionalization of poly(vinylidene fluoride) membrane by radiation-induced emulsion polymerization of hydroxyethyl acrylates in an aqueous medium
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Surface functionalization of poly(vinylidene fluoride) membrane by radiation-induced emulsion polymerization of hydroxyethyl acrylates in an aqueous medium

机译：聚（偏二氟乙烯）膜通过辐射诱导乳液聚合水性介质羟乙基丙烯酸酯的表面官能化

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摘要

Decades ago, surface modification of poly(vinylidene fluoride) (PVDF) membrane became an essential subject. The change is mainly to enhance the hydrophilicity properties of the membrane in order to increase the adsorption capacity, thus making as a novel adsorbent. This study aims to used radiation-induced polymerization and compares the final properties of PVDF grafted hydroxyethyl acrylates (HEA) prepare by two different approaches. The PVDF-grafted-HEA has achieved either direct polymerization or emulsion polymerization. Tween-20 has been used as a surfactant in emulsion polymerization. The final PVDF-grafted poly-HEA was analyzed using several different instruments to observe the changes in terms of morphological structure, topography properties, thermal stability, mechanical strength, and hydrophilicity. Significant differences were seen in morphology and contact angles properties. By emulsion polymerization, poly-HEA grafted in the shape of micelles compare to by direct polymerization shown a thin homogenous layer. Thus, the surface roughness of PVDF by emulsion is higher lead to higher contact angles. Even though both approaches demonstrate significant changes in the physicochemical properties of the PVDF membrane, it is revealed that radiation-induced direct polymerization approaches could achieve a hydrophilic PVDF-grafted HEA.
机译：几十年前，聚偏氟乙烯（PVDF）膜的表面改性成为一个重要课题。这种变化主要是为了提高膜的亲水性，从而增加吸附容量，从而使其成为一种新型吸附剂。本研究旨在使用辐射引发聚合，并比较两种不同方法制备的PVDF接枝丙烯酸羟乙基酯（HEA）的最终性能。PVDF接枝HEA可实现直接聚合或乳液聚合。吐温-20已被用作乳液聚合中的表面活性剂。最后的PVDF接枝聚HEA使用几种不同的仪器进行分析，以观察形态结构、形貌性能、热稳定性、机械强度和亲水性方面的变化。在形貌和接触角特性方面存在显著差异。通过乳液聚合，与直接聚合相比，以胶束形式接枝的聚HEA显示出薄的均相层。因此，乳液法PVDF的表面粗糙度越高，接触角越大。尽管这两种方法都表明PVDF膜的物理化学性质发生了显著变化，但研究表明，辐射诱导直接聚合方法可以实现亲水性PVDF接枝HEA。

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