The present study reports on the preparation of novel nanofibre membranes from the thermoplastic polymer polyvinylidene fluoride coated with chitosan to enhance membrane properties such as hydrophilicity, mechanical properties, water flux and salt rejection. Initially, a supporting layer was produced from polyvinylidene fluoride using phase inversion methods, followed by being coated with chitosan using either electrospinning or immersion methods. Two types of fabricated membranes with different coating methods were characterized and tested for physical and chemical performance using field-emission scanning electron microscopy, tensile tests, permeation tests (water flux and salt rejection) and contact angle measurements. It was found that the support membrane (polyvinylidene fluoride) produced by the phase inversion method that was coated with chitosan using electrospinning showed better performance, with a salt rejection up to 70% for MgSO4, a decreased the contact angle (52°) and improved the elongation at the breaking point (~82%).

中文翻译：

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改进新型热塑性聚合物/壳聚糖纳米纤维膜的脱盐率、亲水性和机械性能

本研究报告了从涂有壳聚糖的热塑性聚合物聚偏二氟乙烯制备新型纳米纤维膜，以提高膜性能，如亲水性、机械性能、水通量和盐截留率。最初，使用转相方法由聚偏二氟乙烯制备支撑层，然后使用静电纺丝或浸渍方法涂覆壳聚糖。使用场发射扫描电子显微镜、拉伸试验、渗透试验（水通量和盐截留率）和接触角测量对两种具有不同涂层方法的制造膜进行表征和物理和化学性能测试。