Large-scale synthesis of fluorine-free carbonyl iron-organic silicon hydrophobic absorbers with long term corrosion protection property  

作　　者：Wei Tian Jinyao Li Yifan Liu Longjiang Deng Yang Guo Xian Jian 

机构地区：[1]National Engineering Researching Centre of Electromagnetic Radiation Control Materials,Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of Education,State Key Laboratory of Electronic Thin Films and Integrated Devices,School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China [2]The Yangtze Delta Region Institute(Huzhou)&School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Huzhou 313001,China [3]School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,China [4]School of Electrical and Information Engineering,Panzhihua University,Panzhihua 617000,China

出　　处：《Nano Research》2022年第10期9479-9491,共13页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51972045 and 5197021414);the Fundamental Research Funds for the Chinese Central Universities,China(No.ZYGX2019J025);Sichuan Science and Technology Program(Nos.2020JDRC0015 and 2020JDRC0045);the Natural Science Foundation of Sichuan(No.2022NSFSC0347);Sichuan Science and Technology Innovation Talent Project(No.2021JDRC0021).

摘　　要：Environmentally-friendly magnetic metallic absorbers with high-performing antioxidant property,thermal stability,and anticorrosion capability have attracted great attention in real-world applications.A surface modification technology of magnetic metallic absorbers with dense and inert materials has been an effective strategy to solve the aforesaid problem.Herein,fluorinefree core–shell carbonyl iron-organic silicon absorbers(CI@SiO_(2)/1,1,1,3,3,3-hexamethyl disilazane(HMDS))were fabricated via a facile one-pot synthesis using tetraethyl orthosilicate(TEOS)and HMDS as the precursor of protective layer(SiO_(2)/HMDS),and CI@SiO_(2)/HMDS hybrid reveals its long-term corrosion resistance and excellent microwave absorption performance with a minimum reflection loss value of−44.3 dB and an effective absorption bandwidth of 5.3 GHz at a thin thickness of 2.0 mm after immersion in 5.0 wt.%NaCl acidic solutions for 2,160 h.Meanwhile,CI@SiO_(2)/HMDS hybrid can still achieve the maximum radar cross-sectional(RCS)reduction values about 16.5 dB·m^(2) at the detectionθof 0°.The exceptional microwave absorption performance and structural stability are largely due to the extraordinary wave-transparent property and shielding ability against corrosive medium of SiO_(2)/HMDS hydrophobic protective layer with a contact angle of 132.5°.The research paves the way for the large-scale and batch production of high-performance magnetic metallic absorbers and increases their survivability and reliability in the harsh environments.

关 键 词：microwave absorption long-term corrosion resistance carbonyl iron(CI)@SiO_(2)/1 1 1 3 3 3-hexamethyl disilazane(HMDS)hybrid CORE-SHELL radar cross-sectional simulation 

分 类 号：TB383[一般工业技术—材料科学与工程]