A novel active-passive protection strategy endows carbonyl iron with excellent intelligent anti-corrosion and microwave absorption dual functional characteristics  

作　　者：Wei Tian Quanyuan Feng Linbo Zhang Yinfan Liu Xian Jian Longjiang Deng 

机构地区：[1]Institute of Microelectronics,School of Information Science and Technology,Southwest Jiaotong University,Chengdu 611756,China [2]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 [3]School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,China [4]The Yangtze Delta Region Institute(Huzhou)&School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Huzhou 313001,China

出　　处：《Nano Research》2025年第1期487-500,共14页纳米研究（英文版）

基　　金：supported by the Joint Funds of the National Natural Science Foundation of China(No.52021001);the Open Foundation of National Engineering Research Center of Electromagnetic Radiation Control Materials(No.KPKFJJ2024004-1);Important Project of the National Natural Science Foundation of China(No.62090012);Technological Achievements Transformation Projects of Central Universities and Institutes in Sichuan(No.2022ZHCG0114);Major Science and Technology Projects in Sichuan Province(No.2023ZDZX0016);the National Natural Science Foundation of China(No.52372103).

摘　　要：Carbonyl iron absorbers(CI)face significant challenges in practical applications,such as corrosion,interface bonding failure,detachment,and high maintenance costs.Herein,we have developed intelligent self-healing technology based on proactive/passive mechanisms via in situ synthesis of self-healing factors(polydopamine/benzotriazole(PDA/BTA))and physical barrier layers(SiO_(2)/1,1,1,3,3,3-hexamethyl disilazane,SiO_(2)/HMDS)to enhance corrosion resistance,while also being compatible with efficient microwave absorption characteristics.The unique multiscale structure gives full play to the utilization of the roles of each functional layer,including the intelligent self-healing features of PDA/BTA,physical shielding and spatial confinement characteristics of SiO_(2)/HMDS,and magnetic-dielectric synergistic mechanism resulted from the good impedance matching characteristics,the conduction loss,the interfacial polarization loss and natural resonance.The asfabricated composites achieved an exceptional minimum reflection loss value of-55.4 dB at 10.7 GHz and the effective absorption band of 7.6 GHz.Moreover,it still exhibits obvious self-healing and corrosion resistance characteristics after 360 h corrosion treatment,ascribed to the self-healing mechanism of PDA/BTA and the blocking intervention effect of SiO_(2)/HMDS.This work is considered to pave the way for the synthesis of high-performance magnetic absorbers,especially in enhancing their intelligent self-healing ability in corrosive environments.

关 键 词：microwave absorption intelligent self-healing technology carbonyl iron multiscale structure magneticdielectric synergistic mechanism 

分 类 号：TB33[一般工业技术—材料科学与工程]