Heat Conduction and Antibacterial Hexagonal Boron Nitride/Polypropylene Nanocomposite Fibrous Membranes for Face Masks with Long-Time Wearing Performance
| Autor: | Meng-Ying Jiang, Hu Guo, Qian Zou, Si-Wei Xiong, Pan Zhang, Li-Sheng Cui, Li-Ye Chen, Ze-Gang Wang, Jing-Gang Gai, Pei-Gen Fu |
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| Rok vydání: | 2020 |
| Předmět: |
Polypropylene
Nanocomposite Materials science 010504 meteorology & atmospheric sciences Nanoparticle 010501 environmental sciences Thermal conduction 01 natural sciences Face masks chemistry.chemical_compound Membrane chemistry General Materials Science Fiber Composite material Antibacterial activity 0105 earth and related environmental sciences |
| Zdroj: | ACS Applied Materials & Interfaces |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | Wearing surgical masks is one of the best protective measures to protect humans from viral invasion during the 2019 coronavirus (COVID-19) outbreak. However, wearing surgical masks for extended periods will cause uncomfortable sweltering sense to users and are easy to breed bacteria. Here, we reported a novel fibrous membrane with outstanding comfortability and antibacterial activity prepared by PP ultrafine fiber nonwovens and antibacterial functionalized h-BN nanoparticles (QAC/h-BN). The thermal conductivity of commercial PP nonwovens was only 0.13 W m-1 K-1, but that of the QAC/h-BN/PP nanocomposite fibrous membranes can reach 0.88 W m-1 K-1, an enhancement of 706.5% than commercial PP nonwovens. The surface temperature of commercial PP surgical masks was 31.8 °C when the wearing time was 60 min. In contrast, QAC/h-BN/PP surgical masks can reach 33.6 °C at the same tested time, exhibiting stronger heat dissipation than commercial PP surgical masks. Besides, the antibacterial rates of QAC/h-BN/PP nanocomposite fibrous membranes were 99.3% for E. coli and 96.1% for S. aureus, and their antibacterial mechanism was based on "contact killing" without the release of unfavorable biocides. We think that the QAC/h-BN/PP nanocomposite fibrous membranes could provide better protection to people. |
| Databáze: | OpenAIRE |
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