摘要
空气中的悬浮病原体已经对人类的健康造成了严重威胁,因此亟需开发具有抗菌活性的空气过滤器。在本文中,以壳聚糖(CS)和单宁酸(TA)为原料,使用冷冻干燥技术使其改变F5中效过滤膜的形态,制备出CS-TA纳米气凝胶空气过滤膜。本文研究了CS-TA膜的微观结构、抗菌性能及对悬浮菌的过滤性能。结果表明,CS-TA膜由不规则的多孔结构组成,并且平均孔径为3.39 nm。该过滤膜对T4噬菌体、黏质沙雷氏菌和大肠杆菌的抗菌效果可达95%以上。并且在20℃至30℃、相对湿度(RH) 25%至75%环境中,CS-TA膜对T4噬菌体的过滤效率比对照膜平均提升了47.99%,对黏质沙雷氏菌的过滤效率比对照膜提升了40.83%。制备出的CS-TA膜对细菌及病毒均具有良好的抗菌效果和截留作用,可应用于室内空气净化过滤除菌。该过滤膜制备方法绿色环保,制备成本低且制备方法简单,在医疗卫生、室内环境的空气净化方面具有广泛的应用前景。
Suspended pathogens in the air pose a significant threat to human health,emphasizing the need for effective antibacterial air filters.This study utilizes chitosan(CS)and tannic acid(TA)as raw materials to develop a CS-TA nanogel air filter via freeze-drying technology,which modifies the morphology of an F5 medium-efficiency filtration membrane.The microstructure,antibacterial properties,and filtration performance against suspended bacteria were investigated.The CS-TA membrane features an irregular porous structure with an average pore size of 3.39 nm.It exhibits more than 95%antibacterial efficacy against T4 bacteriophage,Serratia marcescens,and Escherichia coli.In environments ranging from 20℃to 30℃and relative humidity(RH)25%to 75%,its filtration efficiency for T4 bacteriophage increases by 47.99%,compared to the control membrane,while for Serratia marces-cens,it improves by 40.83%.The CS-TA membrane demonstrates excellent antibacterial effects and retention capa-bilities against bacteria and viruses.This method is environmentally friendly,cost-effective,and simple,making it a promising solution for indoor air purification.
作者
刘志坚
施洁
姚广鹏
林超凡
虞苗
何峻州
LIU Zhijian;SHI Jie;YAO Guangpeng;LIN Chaofan;YU Miao;HE Junzhou(Department of Power Engineering,North China Electric Power University,Baoding 071003,China)
出处
《复合材料学报》
北大核心
2025年第11期6589-6598,共10页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(52208107)
河北省自然科学基金(E2024502012)
中央高校基本科研业务费专项资金(2024MS146)。
关键词
壳聚糖
单宁酸
天然抗菌
空气过滤膜
气凝胶
chitosan
tannic acid
natural antibacterial
air filtration membrane
aerogel
