文献类型：期刊文献

英文题名：Multi-Hierarchically Constructing Durable and Flame Retardant CNF/MXene/PDMS Composite Aerogels for Superhigh Electromagnetic Shielding Performance and Ultralow Thermal Conductivity

作者：Shi, Yongqian Zhu, Yanjun Liu, Shan Fu, Libi Chen, Juntian Liu, Jiawen Tang, Longcheng Gao, Jiefeng Song, Pingan

第一作者：Shi, Yongqian

通信作者：Shi, YQ[1];Fu, LB[2];Song, PG[3]

机构：[1]Fuzhou Univ, Coll Environm & Safety Engn, 2 Xueyuan Rd, Fuzhou 350116, Peoples R China;[2]Guizhou Inst Technol, Coll Mat & Energy Engn, Guiyang 550003, Peoples R China;[3]Fuzhou Univ, Coll Civil Engn, 2 Xueyuan Rd, Fuzhou 350116, Peoples R China;[4]Hangzhou Normal Univ, Minist Educ, Key Lab Organosilicon Chem & Mat Technol, Coll Mat Chem & Chem Engn, Hangzhou 311121, Peoples R China;[5]Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Peoples R China;[6]Univ Southern Queensland, Sch Agr & Environm Sci, Springfield, Qld 4300, Australia

第一机构：Fuzhou Univ, Coll Environm & Safety Engn, 2 Xueyuan Rd, Fuzhou 350116, Peoples R China

通信机构：corresponding author), Fuzhou Univ, Coll Environm & Safety Engn, 2 Xueyuan Rd, Fuzhou 350116, Peoples R China;corresponding author), Fuzhou Univ, Coll Civil Engn, 2 Xueyuan Rd, Fuzhou 350116, Peoples R China;corresponding author), Univ Southern Queensland, Sch Agr & Environm Sci, Springfield, Qld 4300, Australia.

年份：2025

外文期刊名：SMALL

收录：;Scopus(收录号：2-s2.0-105002300418);WOS:【SCI-EXPANDED(收录号:WOS:001462675300001)】；

基金：This work was funded by the National Natural Science Foundation of China (Grant No. 52173070). The authors thank Dr. Ai Na, Dr. Liangjun Xu, and Dr. Zhixin Chen of Fujian College Association Instrumental Analysis Center for assisting analysis of Raman spectra, FTIR spectra, and SEM images, respectively.

语种：英文

外文关键词：electromagnetic interference shielding; flame retardancy; mechanical durability; multihierarchical structure; thermal insulation

摘要：There is a significant increase in the demand for lightweight and compressible electromagnetic interference (EMI) shielding materials in various fields. Though MXene aerogels hold immense potential as EMI shielding materials, several shortcomings including poor water resistance, low mechanical robustness, easy oxidation, and high cost limits of their wide application. This work reported a novel strategy involving the co-assembly of MXene and cellulose nanofibers (CNF) through directional freezing and freeze-drying, followed by the capsulation-concreting of a thin layer of flame-retardant polydimethylsiloxane (PDMS) onto the aerogel, to multi-hierarchically construct a series of high-performance CNF/MXene/PDMS composite aerogels. The lightweight CNF/MXene/PDMS/MPP-Zr@PDA composite aerogel achieved ultrahigh EMI shielding effectiveness of 96.8 dB (X-band) and utilization efficiency of 1713.27 dB g g-1. Furthermore, the PDMS coating effectively imparted excellent compressibility and durability to the 3D scaffold, resulting in a compressive strength of 17.01 kPa for the composite aerogel, representing 199.5% increase compared to CNF aerogel. Additionally, the composite aerogel exhibited outstanding flame-retardant properties (54.6% reduction in heat release rate), ultralow thermal conductivity of 0.0530 W m-1 K-1 and excellent hydrophobicity. Therefore, the durable and flame-retardant CNF/MXene/PDMS composite aerogels hold promising applications in EMI protection, thermal management, smart fire detection, and other specific fields.