Study on self-healing and corrosion resistance behaviors of functionalized carbon dot-intercalated graphene-based waterborne epoxy coating

作     者：Yuwei Ye Hao Chen Yangjun Zou Haichao Zhao Yuwei Ye;Hao Chen;Yangjun Zou;Haichao Zhao

作者机构：Faculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China Ningbo Institute of Materials Technology&EngineeringChinese Academy of SaencesNingbo 315201China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第67卷第8期

页      面：226-236页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the Scientific Research Foundation of Jiangxi University of Science and Technology(No.205200100421) the Jiangxi Provincial Department of Education(No.GJJ190469) Postdoctoral fund of Jiangxi Province(2019KY29) the Research and Development Project of Ganzhou the Science and Technology Innovation Talents Program of Ganzhou the Program of Qingjiang Excellent Young Talents(Jiangxi University of Science and Technology)。 

主　　题：Functionalized carbon dots Corrosion Graphene Self-healing 

摘      要：Functionalized carbon dots(CDs)obtained from citric acid derivative were selected as intercalatorto modify graphene and then dispersed into epoxy matrix to prepare CDs modified graphene/epoxy(CDs-G/EP)coatings.Meanwhile,their microstructure,self-healing and corro sion resistance behaviors were analyzed deeply.Structural characterizations indicated the formation ofπ-πinteraction between functionalized carbon dots and graphene.By observation,the dispersion and interface compatibility of graphene were greatly enhanced by CDs.The change rules of electrochemistry results implied that the addition of 0.5 wt.%CDs-G in EP coating(CDs-G0.5%/EP)demonstrated a superior protective property on steel,which was attributed to the physical barrier of highly dispersed graphene and the self-healing ability of CDs.After 50 days immersion,the oxygen permeability coefficient and water absorption of CDs-G0.5%/EP coating were only 4.27×10^(-13)cm^(3)cm cm^(-2)s^(-1)Pa^(-1) and 4.4%,respectively.