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首页> 外文期刊>Journal of Applied Polymer Science >Effects of different porous fillers on interfacial properties of poly (vinyl alcohol) hybrid films
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Effects of different porous fillers on interfacial properties of poly (vinyl alcohol) hybrid films

机译：不同多孔填料对聚（乙烯醇）杂交膜界面性质的影响

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摘要

Poly(vinyl alcohol) (PVA)-based hybrids have demonstrated broad liquid separation applications but separation performances are constrained by the compatibility between fillers and polymer, and thus it is essential to study the interfacial properties of these hybrids. In this work, PVA hybrids with four different porous fillers have been fabricated and characterized with Fourier transform infrared, X-ray diffraction, Scanning electron microscope, swelling and contact angle tests. Swelling results show that PVA has a degree of swelling (DS) of 79% in water but the swelling is compressed after adding fillers and the DS for PVA hybrids has decreased by 19%, 17%, 15%, and 9% for 30 wt% loading of ZIF-8, UiO-66, H beta and ZSM-5, respectively. For methanol and its 10 wt% aqueous solution, similar swelling results are obtained due to mutual interactions among the filler, polymer and test liquids. Based on water and glycerol contact angle results, the surface energy of PVA is estimated to be 40.56 Nm(-1) and it drops to 27.39 Nm(-1) after adding less hydrophilic ZIF-8 or rise to 48.56 Nm(-1) after introducing more hydrophilic ZSM-5. The high-film hydrophilicity and then large surface energy have rendered methanol/water sorption selectivity of PVA hybrids decrease to some extent or vice versa.
机译：基于聚乙烯醇（PVA）的杂化物已显示出广泛的液体分离应用，但分离性能受到填料和聚合物之间相容性的限制，因此有必要研究这些杂化物的界面性质。在这项工作中，制备了四种不同多孔填料的PVA杂化物，并通过傅里叶变换红外、X射线衍射、扫描电子显微镜、溶胀和接触角测试对其进行了表征。溶胀结果表明，PVA在水中的溶胀度（DS）为79%，但在添加填料后溶胀被压缩，当ZIF-8、UiO-66、Hβ和ZSM-5的负载量为30 wt%时，PVA杂化物的溶胀度分别降低了19%、17%、15%和9%。对于甲醇及其10 wt%水溶液，由于填料、聚合物和试验液体之间的相互作用，可获得类似的溶胀结果。根据水和甘油接触角的结果，PVA的表面能估计为40.56 Nm（-1），在加入少量亲水性ZIF-8后，其表面能下降至27.39 Nm（-1），或在引入更多亲水性ZSM-5后，其表面能上升至48.56 Nm（-1）。薄膜的高亲水性和较大的表面能使PVA杂化物的甲醇/水吸附选择性有所降低，反之亦然。

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