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The antibacterial performance of positively charged and chitosan dipped air filter media

机译：带正电荷和壳聚糖浸渍空气过滤介质的抗菌性能

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摘要

The bacteria and fungi captured on heat insulating materials or air filter media in the ventilation system in civil flights may reentrant into the indoor air which poses a threat to passengers' health. The E. coli and B. subtilis bacteria survival rates on the heat insulating blankets typically used as padding materials inside the aircraft walls under the mimicked environmental condition were studied. Then the antibacterial performance of positively charged electret and chitosan modified filter media which can be used in the ventilation systems against E. coli bacteria was investigated. Our results showed that the E. coli survival rate deceased to less than 0.2% and that of the B. subtilis decreased to less than 2.1% of the control samples on the hydrophilic and hydrophobic blankets under the mimic conditions after one flight cycle. The survival rate of E. coli on the positively charged electret filter media decreased to less than 30% compared to the uncharged filter media after six hours due to the disruption of their metabolic balance by the positive charges on the fibers surface. Moreover, the E. coli survival rate on the pure nylon, nylon/chitosan and chitosan dipped nylon-6 nanofibmus filter media decreased to 8.4%, 7.1% and 2.8% after 120 min, respectively. This study sheds light on fabrication of the eco-friendly antibacterial filter materials for the ventilation systems.
机译：在民用航班通风系统中，在隔热材料或空气过滤介质上捕获的细菌和真菌可能会重入室内空气，这对乘客健康构成威胁。研究了在模仿环境条件下通常用作飞机壁内的填充材料的绝热毯上的大肠杆菌和B.枯草芽孢杆菌生存速率。然后研究了可带正电荷的驻极体和壳聚糖改性过滤介质的抗菌性能，其可用于对E. Coli细菌的通风系统中使用。我们的研究结果表明，在一个飞行循环后，大肠杆菌存活率低至低于0.2％，B.枯草芽孢杆菌在亲水性和疏水毯上的对照样品的少于2.1％。与在六小时后的不带电的过滤介质相比，与纤维表面上的正电荷发生在六小时后，与六小时后的无充电的过滤介质相比，大肠杆菌的存活率降低至小于30％。此外，在120分钟后，纯尼龙，尼龙/壳聚糖和壳聚糖和壳聚糖浸渍尼龙-6纳米纤维过滤介质的大肠杆菌存活率分别降至8.4％，7.1％和2.8％。本研究揭示了对通风系统的生态辅助抗菌过滤材料的制造。

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  • 来源
    《Building and Environment》 |2020年第8期|107020.1-107020.10|共10页
  • 作者

    Sun Zhaoxia; Yue Yang; He Weidong; Jiang Fuze; Lin Chao-Hsin; Pui David Y. H.; Liang Yun; Wang Jing;

  • 作者单位

    South China Univ Technol Sch Light Ind & Engn Guangzhou 510640 Peoples R China|Swiss Fed Inst Technol Inst Environm Engn CH-8093 Zurich Switzerland|Empa Adv Analyt Technol Uberlandstr 129 CH-8600 Dubendorf Switzerland;

    Swiss Fed Inst Technol Inst Environm Engn CH-8093 Zurich Switzerland|Empa Adv Analyt Technol Uberlandstr 129 CH-8600 Dubendorf Switzerland;

    Swiss Fed Inst Technol Inst Environm Engn CH-8093 Zurich Switzerland|Empa Adv Analyt Technol Uberlandstr 129 CH-8600 Dubendorf Switzerland|Northeastern Univ Sch Resources & Civil Engn Shenyang 110819 Peoples R China;

    Swiss Fed Inst Technol Inst Environm Engn CH-8093 Zurich Switzerland|Empa Adv Analyt Technol Uberlandstr 129 CH-8600 Dubendorf Switzerland;

    Boeing Commercial Airplanes Environm Control Syst Seattle WA 98124 USA;

    Univ Minnesota Dept Mech Engn Particle Technol Lab Minneapolis MN 55414 USA;

    South China Univ Technol Sch Light Ind & Engn Guangzhou 510640 Peoples R China;

    Swiss Fed Inst Technol Inst Environm Engn CH-8093 Zurich Switzerland|Empa Adv Analyt Technol Uberlandstr 129 CH-8600 Dubendorf Switzerland;

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  • 正文语种 eng
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  • 关键词

    Antimicrobial; Filter media; Survival rate; Positive charges; Chitosan dipping;

    机译：抗微生物;过滤介质;生存率;正负;壳聚糖浸渍;

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