东北大学学报(自然科学版) ›› 2024, Vol. 45 ›› Issue (2): 270-275.DOI: 10.12068/j.issn.1005-3026.2024.02.015

• 资源与土木工程 • 上一篇    

基于壳聚糖的复合抑菌空气滤料制备与评估

柳静献, 赵琪   

  1. 东北大学 资源与土木工程学院,辽宁 沈阳 110819
  • 收稿日期:2022-10-07 出版日期:2024-02-15 发布日期:2024-05-14
  • 作者简介:柳静献(1966-),男,河北元氏人,东北大学教授,博士生导师.
  • 基金资助:
    国家“十三五”重点研发计划项目(2017YFC0211801);国家自然科学基金资助项目(52174215);辽宁省“兴辽英才计划”项目(XLYC2002091);辽宁省揭榜挂帅科技攻关专项(2021JH1/10400023);浙江省重点研发计划项目(2020C03089);工信部绿色制造项目(2018LSLN001)

Fabrication and Evaluation of Chitosan-based Composite Antibacterial Air Filter

Jing-xian LIU, Qi ZHAO   

  1. School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China. Corresponding author: LIU Jing-xian,E-mail: liujingxian@mail. neu. edu. cn
  • Received:2022-10-07 Online:2024-02-15 Published:2024-05-14

摘要:

由于新冠疫情的暴发,人们对于室内空气质量有了更高的要求.探索既能过滤细微颗粒物,还能抑制和消杀微生物细菌、防止二次污染的过滤材料具有重要意义.以质量分数为1%的聚四氟乙烯(PTFE)乳液配制出不同壳聚糖质量浓度的浸渍液,利用直接浸渍后处理工艺制备出壳聚糖/涤纶/聚四氟乙烯复合抑菌空气滤料.利用大肠杆菌为实验菌落验证其抑菌性能,并对其织物特性、捕集效率及压差特性进行了研究.结果表明,壳聚糖质量浓度为12.5 mg/mL时复合滤料初始阻力最小,对PM2.5粒子捕集效率达到93.88%,品质因子为0.020 13,分别比原始滤料提高19.56%,0.004 4,且对大肠杆菌的抑菌率为84.12%.综上所述,壳聚糖质量浓度为12.5 mg/mL,PTFE乳液质量分数为1%的浸渍液制备的壳聚糖/涤纶/聚四氟乙烯复合抑菌空气滤料兼具良好的过滤能力与抑菌效果.

关键词: 壳聚糖, 复合抑菌空气滤料, 抑菌, 捕集效率, 过滤性能

Abstract:

With the outbreak of COVID-19, there is a growing demand for improved indoor air quality. It is of great significance to explore filter materials that can not only filter fine particulate matter, but also inhibit and disinfect microbial bacteria and prevent secondary pollution. Chitosan impregnation solutions with different concentrations were prepared with 1% mass fraction of polytetrafluoroethylene (PTFE) emulsion, and chitosan/polyester/polytetrafluoroethylene composite antibacterial air filter was designed and fabricated by direct impregnation post-processing. Escherichia coli was used as the experimental colony to verify its bacteriostatic properties, and its fabric characteristics, collection efficiency and pressure drop characteristics were studied. The results showed that the initial pressure drop of the composite air filter was the lowest when the chitosan concentration was 12.5 mg/mL, the collection efficiency for PM2.5 was 93.88%, the quality factor was 0.020 13, which was 19.56% and 0.004 4 higher than that of the raw air filter, and the bacteriostatic rate of E. coli was 84.12%. In conclusion, chitosan/polyester/polytetrafluoroethylene composite antibacterial air filter prepared with chitosan concentration of 12.5 mg/mL and PTFE emulsion concentration of 1% impregnation solution has both good filtration capacity and antibacterial effect.

Key words: chitosan, composite antibacterial air filter medias, antibacterial, collection efficiency, filtration properties

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