Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, P. R. China.
College of Aerospace Engineering, Chongqing University, Chongqing 400044, P. R. China.
ACS Appl Mater Interfaces. 2023 Jun 14;15(23):28491-28502. doi: 10.1021/acsami.3c03250. Epub 2023 May 31.
The accuracy of data collected by optical instruments can be greatly impacted by radar band electromagnetic waves (EM) and scattered visible light. Traditional electromagnetic-wave-absorbing (EMA) materials face challenges in effectively attenuating electromagnetic waves within the visible light spectrum. To address this issue, a structural engineering-based assembly strategy was developed to construct PVDF/TiCNT@PPyNF composites with multiple heterogeneous interfaces, inspired by snake scales. And through the self-doping of N elements and the coating process, the material finally exhibits excellent microwave and visible light absorption properties. This approach generates multiple polarization losses of electromagnetic waves, enabling the material to exhibit excellent electromagnetic wave absorption performance. Specifically, the PVDF/TiCNT@PPyNF composite, containing 5 wt % TiCNT@PPyNFs, demonstrates exceptional microwave absorption performance, with a minimum reflection loss of -65.5 dB and an effective absorption bandwidth of up to 6.95 GHz. Additionally, the composite coating exhibits 97.4% visible light absorption performance, providing a promising solution to the challenges of protecting against complex electromagnetic environments.
光学仪器采集的数据准确性会受到雷达波段电磁波（EM）和散射可见光的极大影响。传统的吸波（EMA）材料在有效衰减可见光范围内的电磁波方面面临挑战。为了解决这个问题，受蛇鳞启发，采用基于结构工程的组装策略，构建了具有多个异质界面的 PVDF/TiCNT@PPyNF 复合材料。通过 N 元素的自掺杂和涂层工艺，该材料最终表现出优异的微波和可见光吸收性能。这种方法产生了多次电磁波的极化损耗，使材料表现出优异的电磁波吸收性能。具体来说，含有 5wt%TiCNT@PPyNFs 的 PVDF/TiCNT@PPyNF 复合材料展现出卓越的微波吸收性能，最小反射损耗为-65.5dB，有效吸收带宽高达 6.95GHz。此外，复合涂层表现出 97.4%的可见光吸收性能，为应对复杂电磁环境的保护挑战提供了有前景的解决方案。
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