含吡啶硫酮锌自抛光防污涂料服役过程防污机理分析  

Analysis of the Antifouling Mechanism of Self⁃Polishing Antifouling Coatings Containing Zinc Pyrithione during Service

作　　者：张凯 王效军 桂泰江[1] 朱永强 王寒冰 齐建涛[2] ZHANG Kai;WANG Xiaojun;GUI Taijiang;ZHU Yongqiang;WANG Hanbing;QI Jiantao(State Key Laboratory of Marine Coatings,Marine Chemical Research Institute Co.,Ltd.,Qingdao 266071,China;College of New Energy,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]海洋化工研究院有限公司海洋涂料国家重点实验室,山东青岛266071 [2]中国石油大学(华东)新能源学院,山东青岛266580

出　　处：《材料保护》2023年第12期19-24,35,共7页Materials Protection

基　　金：NSFC-山东联合基金(U2006219);国防基础科研计划项目(JCKY2021513B001);海洋涂料国家重点实验室开放课题;中国石油大学(华东)大学生创新训练项目(202207057)资助。

摘　　要：为了探究含吡啶硫酮锌自抛光防污涂料(ZPT⁃SPC)在服役过程中的成分、pH值以及防污剂吡啶硫酮锌(ZPT)浓度变化,以明确ZPT⁃SPC服役过程的防污机理,通过SEM/EDS分析了涂料抛光前后截面微观形貌及成分的变化;通过开路电位⁃pH实验测量涂料划痕微观电位⁃pH信息的变化;通过拉曼光谱探究服役过程涂料表面ZPT成分及含量的变化。SEM/EDS结果表明,抛光后表面变得更加致密,Zn元素含量下降。需要注意的是,Zn含量远大于Cu含量即ZPT含量远大于Cu_(2)O含量。开路电位⁃pH测量结果表明ZPT⁃SPC划痕界面pH值总体呈现先降低后升高的趋势,并最终趋近于原始的pH值。拉曼光谱表明ZPT向外界进行了缓慢扩散使得内部的浓度减小,并在防污涂料内部发生了ZPT转移使成分更为均匀分布,该过程可通过防污剂浓度⁃颜色灰度关联模型宏观表征。In order to explore the composition,pH and concentration changes of the antifouling agent zinc pyrithione(ZPT)during the service process of zinc pyrithione⁃containing self⁃polishing antifouling coating(ZPT⁃SPC),and clarify the antifouling mechanism of ZPT⁃SPC during service,SEM/EDS were employed to explore the changes in cross⁃sectional micromorphology and composition of coatings before and after polishing.Moreover,the open circuit potential⁃pH experiment was used to measure the changes in the micro⁃potential⁃pH information of paint scratches.The changes in ZPT composition and content on the paint surface during service were explored through Raman spectroscopy.SEM/EDS results showed that the surface became denser,and the Zn element content decreased after polishing.Notably,the Zn content was much greater than the Cu content,which indicated that he ZPT content was much greater than the Cu2 O content.In addition,the open circuit potential⁃pH measurement results showed that the pH value of the ZPT⁃SPC scratch interface generally exhibited a trend of first decreasing and then increasing,and eventually approached the original pH value.Raman results showed that the ZPT slowly diffused to the outside,which re⁃duced the internal concentration,and the ZPT component transfer occurred inside the antifouling coating,resulting in a more uniform distribu⁃tion of components.Furthermore,this process could be characterized macroscopically by antifouling agent concentration⁃color gray correlation model.

关 键 词：自抛光防污涂料 吡啶硫酮锌 SEM/EDS 电位⁃pH 拉曼光谱 

分 类 号：TQ630.1[化学工程—精细化工]