posted on 2021-12-21, 18:42authored byHao Wang, Yuying Ma, Ju Qiu, Jing Wang, Hao Zhang, Yongxin Li, Ce Wang
With
the development of modern infrared detection systems, military
targets are more easily exposed, leading to the increasing risk of
high-value targets being detected. Thus, stealth materials are highly
desired to protect these targets. Additionally, stealth materials
should expand their application scenarios to meet the growing performance
requirements of military equipment. In this work, a polyacrylonitrile
(PAN)/Al–ZnO/Ag nanofiber composite (PAN/ZAO/Ag) with three
functions including infrared protection, antibacterial property, and
self-cleaning was prepared by electrospinning, solvothermal, and electroless
plating processes. The Schottky junction was formed due to the direct
contact between ZAO nanosheets and Ag nanoparticles, leading the materials
to possess the characteristic of plasmon resonance absorption of near-infrared
light. In the thermal infrared imaging band of 8–14 μm,
the infrared emissivity of the fiber was as low as 0.39, effectively
blocking the target’s thermal radiation. The composite membranes
also achieved self-cleaning effect and synergistic antibacterial effect,
with the maximum contact angle of 131.5° for water and 100%
of antibacterial rate. In summary, this study provided a possibility
for multifunctional infrared protective clothing materials to deal
with the complex battlefield environment.