P-doped cellulose nanofiber derived carbon aerogel with efficient thermal insulation and electromagnetic wave absorption performances

被引：8

作者：

Mao, Yunshan ^{[1
]}

Sheng, Yuhao ^{[1
]}

Gao, Yutong ^{[1
]}

Yang, Jing ^{[1
]}

Liu, Jian ^{[1
]}

Tam, Kam Chiu ^{[2
]}

Fu, Shaohai ^{[1
]}

Chen, Weihong ^{[3
]}

Tang, Chunxia ^{[1
]}

机构：

[1] Jiangnan Univ, Coll Text Sci & Engn, 1800 Lihu Ave, Wuxi 214122, Jiangsu, Peoples R China

[2] Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, 200 Univ Ave, Waterloo, ON N2L 3G1, Canada

[3] Jiangsu Phoenix Art Mat Technol Co Ltd, 2 Huayuan Rd, Wuxi, Jiangsu, Peoples R China

来源：

CARBON | 2024年 / 228卷

基金：

中国国家自然科学基金;

关键词：

Cellulose nanofiber; Carbon aerogel; P-doped; Electromagnetic wave absorption; Multi-scenario application;

D O I：

10.1016/j.carbon.2024.119412

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Developing eco-friendly electromagnetic wave (EMW) absorption materials with simultaneous compression-resistant resilience, thermal insulation properties, and stability in complex environments is a formidable challenge. Inspired by the honeycomb structures, we utilized the concepts of directional freezing and carbonization to fabricated versatile P-doped hydrophilic carbon aerogel (CPA) for more demanding and complex applications. The numerous boundary-type defects generated by graphene nanosheets (GNs) and multi-walled carbon nanotubes (MWCNTs) on the surfaces of the honeycomb structure served as polarization centers, resulting in an effective absorption bandwidth (EAB) spanning from the C band to the Ku band (4-18 GHz, 1.0-4.0 mm) yielding a minimum reflection loss (RL, -72.02 dB) for CPA-800. The radar cross section (RCS) values of CPA-800 were below -15 dBm2 within the range of -90 degrees < theta < 90 degrees, possessing a strong radar wave attenuation capability for potential application in both air and underwater conditions. The thermal insulation performance of CPA-800 reduced the sample temperature from 300 degrees C to 63 degrees C, and possessed outstanding structural stability during prolonged and intense flame exposure. This work represents a novel multifunctional platform for EMW absorption, thermal insulation, and resilience materials in various harsh environments.

引用

页数：13

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