A Self-Strengthening Epidermis-Like Smart Coating Enabled by Dynamic Iron Sequestration
作者机构：Key Laboratory of Microsystems and Micronanostructures ManufacturingHarbin Institute of TechnologyHarbin 150080 State Key Laboratory of Inorganic Synthesis and Preparative ChemistryJilin UniversityChangchun 130012
出 版 物：《CCS Chemistry》 (中国化学会会刊（英文）)
年 卷 期：2021年第3卷第11期
页 面：2655-2668页
学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：M.Y.thanks the National Natural Science Foundation of China(grant no.22071075)for financial support S.H.Feng thanks the National Natural Science Foundation of China(grant nos.21831003 and 91959201)for financial support
主 题：biomimetics self-strengthening selfhealing smart coating epidermis-like
摘 要：Living organisms rely on materials sequestration from the environment to strengthen their *** constant activity provides necessary supplies for critical biological functions,which is difficult by man-made structures due to the lack of a dynamic sequestration *** this study,it is shown that an epidermis-like smart coating can respond to changes in salinity to allow a spontaneous and progressive strengthening when supported by steel as a sustained iron *** self-strengthening is enabled by reaction-coupled diffusion,which makes possible the dynamic sequestration of iron from the in situ rusted steel,partially mimicking the iron accumulation process in a *** emergence of iron-phenolic coordination bonds continuously improves modulus,hardness,and adhesion,achieving a strengthening efficiency comparable to mussel ***,the bilayer design ensures long-term self-healing performance even during strengthening and a mechanically robust anticorrosion coating with an autonomic protection mechanism and gradually enhanced barrier properties during prolonged *** results provide a new venue for the design of stimuli-responsive smart materials characteristic of an open biological system and may serve as the basis for creating highly intelligent devices with sophisticated functionality.
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