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1、阳离子无皂含氟丙烯酸酯的合成与表面性能汪海伟,袁荞龙,吴树森(华东理工大学材料科学与工程学院,上海200237)摘要:在合成甲基丙烯酸全氟辛酰氧基乙酯(FA)基础上,用半连续法制备了无皂阳离子含氟丙烯酸酯乳液。当乳液的粒径在100～200nm、ζ电位大于40mV时,乳液较稳定。阳离子亲水单体甲基丙烯酰氧乙基三甲基氯化铵(DMC)在含氟丙烯酸酯中质量分数为0.10～0.18、固含量小于20%时乳液的稳定性好,且随DMC含量的增加稳定性提高;含氟丙烯酸酯乳胶膜的附着力与耐磨性好,乳胶膜的透湿率随DMC的增加而增加。随热处理温度的提高,膜表面自由能下降;经160℃热处理
2、后膜发生了交联,表面自由能为18mN/m,与聚四氟乙烯(PTFE)的表面能相近,DMC含量对膜表面自由能影响不大。XPS分析也表明膜表面氟含量随热处理温度的提高而增加。关键词:含氟丙烯酸酯单体;阳离子单体;无皂乳液聚合;稳定性;表面性能中图分类号:O631文献标识码:A文章编号:100829357(2007)0220184209PreparationandSurfacePropertyofCationicEmulsifier2FreeFluorinatedPolyacrylatesWANGHai2wei,YUANQiao2long,WUShu2sen(School
3、ofMaterialsScienceandEngineering,EastChinaUniversityofScienceandTechnology,Shanghai200237,China)Abstract:Perfluorooctylacyloxyethylmethacrylatewassynthesizedandusedincopolymerizationwithacrylates.Thecationicemulsifier2freeemulsionswasproducedbysemicontinuingfeed.Thecationicemulsionwas
4、stablewhentheparticlesizewasintherangeof1002200nmindiameter,andtheZetapotentialoftheemulsionwasmorethan40mV.Meanwhile,theemulsionwasalsosteadywhenthesolidcontentwaslessthan20%andthecontentofhydrophilicmonomer,methacrylacy2loxyethyltrimethylammoniumchloride(DMC),incopolymerwasin10%～18%
5、,andthestabilityoftheemulsionwasincreasedwiththeadditionofDMC.Thefluorinatedpolyacrylatesfilmwasofgoodadhesionandabrasion2resistant,andthewatervaportransferrateofthefilmwasincreasedwiththeDMCcontentincreasing.Theheatprocessofthefluorinatedpolyacrylatesfilmwaseffec2tivetoimprovethesurf
6、acepropertyofthefilm.Thesurfacefreeenergyofthefluorinatedpolyacry2latesfilmwasdeclinedwithincreaseofthepostheatedtemperature.Thesurfacefreeenergyofthefilmpostheatedat160°C,abovecuringtemperature,was18mN/m.ThisresultissimilartothatofthesurfacefreeenergyofPTFE.Furthermore,thewaterandoil
7、2repellentofthefilmwasnotinfluencedbythevariationofthehydrophilicmonomercontent.XPSanalysiselucidatedthatthe收稿日期:2006207204作者简介:汪海伟(19802),男,安徽省安庆人,硕士,主要研究方向:水生含氟丙烯酸酯。通讯联系人:袁荞龙,E2mail:qlyuan@ecust.edu.cn·185·第2期汪海伟,等:阳离子无皂含氟丙烯酸酯的合成与表面性能fluorinecontentofthefilmsurfaceincreasedwithenhan
8、cemen
