膜科学与技术

聚乙烯醇/海藻酸钙复合膜的制备及耐水性能研究

作者：李巧慧王文广张晨赵浩如孙海翔

单位：中国石油大学（华东）理学院材料物理与化学系，青岛 266580

关键词：聚乙烯醇；海藻酸钠；交联改性；耐水性能

出版年,卷(期):页码： 2018,38(3):63-67

摘要：

以聚乙烯醇、海藻酸钠为主要原料，CaCl2为交联剂，制备了聚乙烯醇/海藻酸钙复合膜。以溶胀度为主要指标，分析了聚乙烯醇的含量与交联剂浓度对复合膜耐水性能的影响，并对聚乙烯醇/海藻酸钙复合膜的微观形貌进行了表征。研究结果表明：当聚乙烯醇的含量为60 wt%，交联剂浓度为2 wt%时，体系的交联效果改善显著，复合膜具有较高的耐水性、亲水性与保水率；扫描电镜与原子力显微镜结果显示聚乙烯醇和海藻酸钙之间有良好的相容性，复合膜的表面粗糙度提高。该研究将为聚乙烯醇/海藻酸钙复合膜的实际应用提供一定的理论基础。

Polyvinyl alcohol/alginate composite membrane was prepared by using CaCl2 as crosslinking agent. With the swelling degree as the main evaluation index, the influences of polyvinyl alcohol content and crosslinking agent concentration on the water resistance of the composite membrane was analyzed. The micromorphology of the composite membrane was characterized by SEM and AFM. The results indicated that the cross-linking effect of the composite membrane was improved remarkably when the content of polyvinyl alcohol was 60 wt% and the concentration of crosslinking agent was 2wt %, In this condition, the composite membrane had optimum water resistance, hydrophilicity and water retention rate. The SEM and AFM showed that there were good compatibility between polyvinyl alcohol and calcium alginate and improved surface roughness of the composite membrane after crosslinking. This research will provide a certain theoretical basis for the practical application of polyvinyl alcohol/calcium alginate composite membrane.

李巧慧（1997-），女，山东省青岛市人，本科生，主要从事高分子膜材料分离研究。*通讯作者，E-mail：sunhaixiang@upc.edu.cn

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