基于乙烯基磷酸的核壳乳液功能防腐涂层制备

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中图分类号：063 文献标志码：A

Preparation of Core-Shell Emulsion Functional Anticorrosive Coating Based on Vinyl Phosphonic Acid

SUN Jiangang， HE Haochen， CAO Hongliang （SchoolofMaterialsScienceandEngineering，EastChinaUniversityofScienceandTechnologyhanghai237，hina）

Abstract：Aluminum and its alloys have a wide range of applications because of their excelent properties.However， aluminum corrodes during actual use.Therefore，protecting aluminum is usuallyachieved through coatings.Due to environmental protection requirements，the researchof water-based coatings is becoming more and more important.This paper reportedthe preparationof functional latex particles containing phosphonic acid with core-shellstructure using styrene （St） and n -butyl acrylate （BA）as copolymers and vinyl phosphonic acid （VPA）as the functional monomer.The core-shell structure was accomplished through seed emulsion polymerization，using poly（St-co-BA）as the seed and poly（St-co-BA-coVPA）as theshell.Thecore-shellemulsions exhibitedasolidcontent （mass fractionofsolid particles inthe emulsionproduct） of approximately 30% ，uniform particle distribution， and a well-defined core-shel structure.The coatings exhibited a thermal decomposition temperature above 380∘C .The corrosion potential of the coating reached 1.74V ， the corrosion current density decreased，and thecorrosionresistance wasexcellnt，which proved theexcellent corrosionresistance of aluminum.In electrochemical impedance spectroscopytests，this functional coatinghadahigh impedance，whichalso provedthatthis coating could greatly slow down the corrosion rate.

Key words： seed emulsion polymerization;vinyl phosphanic acid;core-shellstructure;aluminum anticorosive coating; water-based coating

铝及其合金因高比强度、良好延展性、易加工及低成本等优势，在航空航天[I、船舶海运[2]以及建筑材料[3]等领域有着广泛应用。（剩余16115字）