文献类型：期刊文献

英文题名：NiCo2O4/Hollow Mesoporous Carbon Nanosphere Hybrids Enabling Super-Hydrophobicity, Thermal Insulation, and Highly Efficient Microwave Absorption

作者：Ma, Wenjun[1];He, Peng[1];Zhou, Yukang[1];Xie, Chao[1];Chen, Yi[2];Liu, Xiaoyun[1];Lin, Shaoliang[1];Zuo, Peiyuan[1];Zhuang, Qixin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Adv Polymer Mat Shanghai, Shanghai 200237, Peoples R China;[2]Shanghai Spaceflight Precis Machinery Inst, Shanghai 201108, Peoples R China

年份：2023

卷号：19

期号：49

外文期刊名：SMALL

收录：;EI(收录号：20233414604449);WOS:【SCI-EXPANDED(收录号:WOS:001052170200001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 52073091 and 22171086), Shanghai Rising-Star Program (Program No. 21QA1403900), Shanghai Pujiang Program (Program No. 22PJ1402500), and the Natural Science Foundation of Shanghai (Grant No. 20ZR1414600).

语种：英文

外文关键词：hollow mesoporous carbon nanospheres; microwave absorption; NiCo2O4; super-hydrophobic property; thermal insulation

摘要：The combination of 2D magnetic nanosheets and mesoporous carbon with unique interfaces shows considerable prospects for microwave absorption (MA). However, traditional assembly procedures make it impossible to accurately manage the assembly of magnetic nanosheets in carbon matrices. Herein, a reverse strategy for preparing complex magnetic nanosheet cores inside carbon-based yolk-shell structures is developed. This innovative approach focuses on controlling the initial crystallite formation sites in a hydrothermal reaction as well as the inflow and in situ growth behavior of 2D NiCo-layered double hydroxide precursors based on the capillary force induced by hollow mesoporous carbon nanospheres. Accordingly, the as-prepared YS-CNC-2 absorber exhibits remarkable MA performances, with an optimal reflection loss as low as -60.30 dB at 2.5 mm and an effective absorption bandwidth of 5.20 GHz at 2.0 mm. The loss of electromagnetic waves (EMW) depends on natural resonance loss, dipole polarization relaxation, and multiple scattering behavior. On top of that, the functionalized super-hydrophobic MA coating is produced in spraying and curing processes utilizing YS-CNC-2 nanoparticles and fumed silica additives in the polydimethylsiloxane matrix. The excellent thermal insulation, self-cleaning capability, and durability in diverse solutions of the coating promise potential applications for military equipment in moist situations.