超宽光谱伪装涂层来自金属片粉末
Siqi Fu1, Zudian Liang2, Xing Qian3
1State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
ACS applied materials & interfaces
|May 20, 2024
概括
一种新的超宽频谱伪装材料使用碳纳米管在多孔和片上,可在可见光中提供低反射,在红外线中提供低发射率,并为增强的军事应用提供高微波吸收.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 军事科学 军事科学
背景情况:
- 先进的多光谱探测器需要超宽光谱的伪装材料,用于军事和国家安全.
- 现有的伪装技术面临挑战,因为不同频段的频谱要求相互矛盾.
- 复杂的多谱探测器正在不断进步,增加了对有效伪装解决方案的需求.
研究的目的:
- 展示一种与可见,红外和微波波段兼容的新型超宽频谱伪装材料.
- 通过实现同时实现低反射率,低发射率和高微波吸收,解决当前伪装材料的局限性.
- 开发一种材料,在多光谱操纵,电磁信号处理和热管理方面具有潜在的应用.
主要方法:
- 复合材料的制造:碳纳米管在多孔的阳极/片粉上被吸附 (CNTs@PAA/AFP).
- 生物灵感设计利用多孔来实现低可见反射和片粉来实现低红外辐射.
- 将碳纳米管加载到多孔体上,以增强微波吸收.
主要成果:
- CNTs@PAA/AFP材料在可见光谱 (400-800 nm) 中表现出全向的低反射率 (平均R=0.29) 和高灰度 (72%).
- 它在红外大气窗口中显示出低发射率 (ε3-5μm = 0.15, ε8-14μm = 0.18),红外锁定范围降低了高达59.6%.
- 在S-Ku频段 (2-12 GHz) 实现了高微波吸收 (最小RL = -42.46 dB) 和有效吸收带宽 (EAB = 7.43 GHz).
结论:
- 开发的CNTs@PAA/AFP材料有效地在可见,红外和微波频率上提供超宽频谱伪装.
- 与现有技术相比,生物启发的结构设计和材料组成在伪装性能方面取得了显著的改进.
- 这项研究为开发用于国防的先进材料和其他需要多光谱控制的应用提供了有前途的方法.
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