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Preparation and properties of polyelectrolyte complex-polyvinyl alcohol-based
antibacterial total heat exchange membrane

Authors： LI Wenli1,2, WANG Wei1,2, LIU Shengkai1, SHAO Ruiqi1,2, SHI Haiting1, WANG Zhishen1,2, LIU Liangsen1, XU Zhiwei1,2

Units： 1. Key Laboratory of Advanced Textile Composites, Ministry of Education, College of Textile Science and Engineering, Tiangong University, Tianjin 300387, China; 2. Shaoxing Keqiao Research Institute, Tiangong University, Shaoxing 312030, China

KeyWords： full heat exchange membrane; polyelectrolyte complex; quaternary ammonium salt; alginate; water vapor transmittance; gas barrier property

ClassificationCode：TQ028; TB324

year,volume(issue):pagination： 2025,45(2):83-91

Abstract：

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.

Funds：

国家自然科学基金青年基金项目(12205218)

AuthorIntro：

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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