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发明公开
CN109331667A 一种芳香聚酰胺复合膜的表面改性方法 有权 许可

一种芳香聚酰胺复合膜的表面改性方法
摘要：
一种芳香聚酰胺复合膜的表面改性方法，属于功能高分子材料领域。按照在室温下，将表面含有酰氯基团的新生芳香聚酰胺复合膜浸渍在聚氨酯预聚物溶液中，静置0.1～1小时；将经过聚氨酯预聚物溶液浸渍的新生芳香聚酰胺复合膜置于温度为25～80℃的烘箱中，干燥0.5～15小时，得表面接枝聚乙二醇链、酰氯基团、季铵阳离子和水杨醛功基团的芳香聚酰胺复合膜；将上述表面接枝聚乙二醇链、酰氯基团、季铵阳离子和水杨醛功能基团的芳香聚酰胺复合膜使用去离子水洗涤至中性，制得表面接枝聚乙二醇链、羧基阴离子、季铵阳离子和水杨醛功能基团的芳香聚酰胺复合膜。本发明聚芳香酰胺复合膜的表面具有超亲水性，抗污耐氯性能高，海水淡化运行性能稳定持久等特点。
摘要（英）：

The invention discloses a surface modification method of an aromatic polyamides thin film composite membrane (APA-TFC membrane), and belongs to the field of functional polymer materials. The surface modification method comprises the following steps: immersing a fresh APA-TFC membrane having an acyl chloride group on the surface in a polyurethane prepolymer solution at room temperature and standingfor 0.1-1 hour; placing the fresh APA-TFC membrane immersed with the polyurethane prepolymer solution in an oven of 25-80 DEG C, and drying for 0.5-15 hours to obtain the APA-TFC membrane having thesurface grafted with a polyethylene glycol chain, an acyl chloride group, quaternary ammonium cations and a salicylaldehyde functional group; washing the APA-TFC membrane having the surface grafted with the polyethylene glycol chain, the acyl chloride group, the quaternary ammonium cations and the salicylaldehyde functional group with deionized water to be neutral to obtain the APA-TFC membrane having the surface grafted with the polyethylene glycol chain, carboxyl anions, the quaternary ammonium cations and the salicylaldehyde functional group. The APA-TFC membrane provided by the invention has the characteristics of superhigh surface hydrophilicity, high surface stain resistance and chlorine resistance, stable and long-lasting seawater desalination operating performance and the like.

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