Modification of Polyvinylidene Fluoride (PVDF) Membrane by Polymer Blending with Phase Inversion Method

Jurnal Rekayasa Kimia & Lingkungan Pub Date : 2023-11-24 DOI:10.23955/rkl.v18i2.26974

U. Fathanah, Muhfadzalah - Muhfadzalah, Sri - Aprilia, S. Muchtar, M. Yusuf

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Abstract

One of the simplest approaches to improve membrane performance is to increase the hydrophilicity of the membrane. This article describes the manufacture of activated polyvinylidene fluoride (PVDF) based membranes using PVP and chitosan as organic additives, with the specific aim of increasing the hydrophilicity of the membranes. Variations of dope solution were made by adding 1% by weight of PVP and 1, 2, and 3% by weight of chitosan into three different PVDF polymer solutions. The effect of additives on the membrane was obtained by evaluating chemical functional groups by ATR-FTIR, morphological changes by SEM, and filtration performance. SEM images show that the presence of additives changes the morphological structure of the membrane. This change also had a significant impact on the membrane performance, as evidenced by the increased permeability of the pure water solution and the removal of dissolved humic acid. Overall, modified PVDF membranes with 1% by weight of PVP and 1, 2, and 3% by weight of chitosan resulted in much better permeability than unmodified PVDF membranes due to their excellent hydrophilicity.

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用相反转法混合聚合物改性聚偏二氟乙烯（PVDF）膜

提高膜性能的最简单方法之一是增加膜的亲水性。本文介绍了使用 PVP 和壳聚糖作为有机添加剂制造活化聚偏二氟乙烯（PVDF）膜的情况，其具体目的是增加膜的亲水性。我们在三种不同的 PVDF 聚合物溶液中分别加入了 1%（重量）的 PVP 和 1%、2% 和 3%（重量）的壳聚糖，从而改变了掺杂溶液。通过 ATR-FTIR 评估化学官能团、扫描电镜观察形态变化和过滤性能，得出添加剂对膜的影响。扫描电镜图像显示，添加剂的存在改变了膜的形态结构。这种变化也对膜的性能产生了重大影响，纯水溶液渗透性的提高和对溶解腐植酸的去除就是证明。总体而言，含有 1%（重量）PVP 和 1%、2% 和 3%（重量）壳聚糖的改性 PVDF 膜由于具有出色的亲水性，其渗透性比未改性的 PVDF 膜好得多。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Jurnal Rekayasa Kimia & Lingkungan

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