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聚电解质复合物-聚乙烯醇基抗菌全热交换膜的制备与性能

作者：李文丽¹，²，王维¹，²，刘胜凯¹，邵瑞琪¹，²，石海婷¹，王芝绅¹，²，刘梁森¹，徐志伟¹，²

单位： 1. 天津工业大学纺织科学与工程学院先进纺织复合材料教育部重点实验室，天津 300387； 2. 天津工业大学绍兴柯桥研究院，绍兴 312030

关键词：全热交换膜；聚电解质复合物；季铵盐；藻酸盐；水蒸气透过率；气体阻隔性

DOI号： 10.16159/j.cnki.issn1007-8924.2025.02.010

分类号： TQ028; TB324

出版年,卷(期):页码： 2025,45(2):83-91

摘要：

聚电解质复合物是具有相反电荷的聚电解质所构成的高度亲水的高分子合成材料，是制备亲水性薄膜的理想材料，已被用于水处理领域。本文以聚乙烯薄膜为基材，将季铵盐和藻酸盐引入铸膜液中形成聚电解质复合物，最后将其涂于聚乙烯膜基材一面，制备了负载聚电解质复合物的全热交换膜。对全热交换膜的结构、形貌进行了表征，探究了聚电解质复合物对全热交换膜的热稳定性、水蒸气透过率和气体阻隔性能的影响。结果表明，与季铵盐-聚乙烯醇基复合膜和藻酸盐-聚乙烯醇基复合膜相比，季铵盐-藻酸盐-聚乙烯醇基聚电解质复合物全热交换膜的综合性能最优，最大热分解温度高达281.3 ℃，水蒸气透过率高达2 758.4 g/(m2·d)，气体阻隔性高达1.15×108 m2·m3·Pa，并且抗菌效果显著，聚电解质复合物的引入，协同提高了全热交换膜的水蒸气透过率和气体阻隔性，为全热交换领域提供了一种高效的全热交换膜。

Polyelectrolyte complex is a highly hydrophilic synthetic polymer composed of polyelectrolytes with opposite charges. It is an ideal material for the preparation of hydrophilic films, and has been used in the field of water treatment. However, there is relatively lack of research on polyelectrolyte complexes in the field of total heat exchange membranes. In this paper, polyelectrolyte complex was formed by introducing quaternary ammonium salt, alginate and poluvinyl alcohol into the casting film solution, and then coated into a porous polyethylene substrate membrane to prepare the total heat exchange membrane. The structure and morphology of the total heat exchange membrane were characterized. The influence of polyelectrolyte complex on the thermal stability, water vapor permeability and gas barrier properties of the total heat exchange membrane was investigated. The results showed that compared with the quaternary ammonium alkali-polyvinyl alcohol-based composite membrane and alginate-polyvinyl alcohol-based composite membrane, the overall performance of the quaternary ammonium alkali-polyvinyl alcohol-based polyelectrolyte composite membrane was the superior, the maximum thermal decomposition temperature was 281.3 ℃, and the water vapor transmission rate was 2 758.4 g/(m2·d);the gas barrier property is as high as 1.15×108 m2·m3·Pa, and the antibacterial effect is significant. The introduction of polyelectrolyte complex enhanced the water vapor permeability and retained gas barrier property at the same time. providing an efficient total heat exchange membrane for the field of total heat exchange.

基金项目：

国家自然科学基金青年基金项目(12205218)

作者简介：

李文丽（2000-），女，河南新乡人，硕士研究生，研究方向为全热交换膜

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