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首页> 外文期刊>Journal of Applied Polymer Science >Improvement of filtration performance of polyvinyl chloride/cellulose acetate blend membrane via acid hydrolysis
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Improvement of filtration performance of polyvinyl chloride/cellulose acetate blend membrane via acid hydrolysis

机译：通过酸水解改善聚氯乙烯/纤维素共混膜的过滤性能

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摘要

Based on the hydrophilicity and biodegradability of cellulose acetate (CA), polyvinyl chloride (PVC)/CA blend membrane was prepared by solution comixing and phase transformation method. Then the CA in the blend membrane was partially hydrolyzed under acidic conditions to improve the hydrophilicity of the blend membrane, so as to improve the filtration performance of the PVC/CA blend membrane. The properties of the membranes were systematically characterized by Fourier transform infrared spectroscopy, differential scanning calorimeter, and scanning electron microscopy (SEM). The porosity, water contact angle, pure water flux (PWF), protein retention rate, and mechanical properties of the membrane were measured, and the effect of hydrolysis on the filtration performance of the blend membrane was analyzed. The results showed that the hydrophilicity and porosity of the blend membrane increased, the PWF and protein rejection rate enhanced after acid catalyzed hydrolysis, while the mechanical properties of PVC membrane were maintained. This simple preparation method endows PVC/CA blend membrane with desirable filtration performance, and also helps to overcome the disadvantages of poor hydrophilicity and easy pollution of pure PVC membrane.
机译：基于醋酸纤维素（CA）的亲水性和生物降解性，采用溶液混合和相变法制备了聚氯乙烯（PVC）/CA共混膜。然后在酸性条件下对共混膜中的钙进行部分水解，以提高共混膜的亲水性，从而改善PVC/CA共混膜的过滤性能。通过傅立叶变换红外光谱、差示扫描量热仪和扫描电子显微镜（SEM）对膜的性能进行了系统表征。测定了膜的孔隙率、水接触角、纯水通量（PWF）、蛋白质保留率和机械性能，并分析了水解对共混膜过滤性能的影响。结果表明，酸催化水解后，共混膜的亲水性和孔隙率增加，PWF和蛋白质截留率提高，而PVC膜的力学性能保持不变。这种简单的制备方法使PVC/CA共混膜具有良好的过滤性能，也有助于克服纯PVC膜亲水性差、易污染的缺点。

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