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 

机构地区：[1]Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China [2]Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Saences,Ningbo 315201,China

出　　处：《Journal of Materials Science & Technology》2021年第8期226-236,共11页材料科学技术（英文版）

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)。

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 of"π-π"interaction 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.

关 键 词：Functionalized carbon dots Corrosion GRAPHENE SELF-HEALING 

分 类 号：TQ630.1[化学工程—精细化工]