自乳化全氟烷基阳离子聚丙烯酸酯乳液的制备及涂膜性能  

Preparation and film properties of self-emulsified perfluoroalkyl cationic polyacrylate emulsion

作　　者：李培枝[1] 刘晨迪 赵会芳[2] 杨晓武[1] 

机构地区：[1]陕西科技大学化学与化工学院,陕西西安710021 [2]浙江科技学院轻工学院,浙江杭州310023

出　　处：《陕西科技大学学报（自然科学版）》2015年第6期99-103,共5页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(51373091);陕西科技大学博士科研启动基金项目(BJ12-08);陕西科技大学学科人才培养计划项目(XSGP201212)

摘　　要：采用两步转相聚合法,以全氟烷基乙基丙烯酸辛酯(FEA)为功能单体,制备了自乳化全氟烷基阳离子聚丙烯酸酯乳液.通过红外光谱(FT-IR)和核磁共振F谱(19 F-NMR)对聚合物的结构进行了表征,测量了涂膜的接触角并计算表面自由能,用X射线光电子能谱(XPS)检测分析了元素梯度分布情况,并考察了该涂膜的耐热性和耐老化性能.结果表明,含氟烷基链段有明显的表面富集现象,全氟单体的加入有效地降低了涂膜的表面自由能.同时,热处理温度对涂膜表面能有较大影响,当FEA用量为38%时,涂膜的表面自由能可降至12.08mJ/m2.并且,涂膜具有较好的耐热性和耐老化性能.The self‐emulsified perfluoroalkyl cationic polyacrylate emulsion was prepared u‐sing perfluoroalkyl ethyl acrylate （FEA） as functional monomer by two‐step turn phase pol‐ymerization .The structure of the polymer was characterized by FT‐IR and 19 F‐NMR .And the contact angle of the membrane was measured and surface energy was calculated ,the gra‐dient distribution of elements was examined X‐ray photoelectron spectroscopy （XPS ） ,then the heat resistance and aging resistance were also investigated .The results showed that per‐fluoroalkyl chains had significant enrichment to the surface ,the surface free energy was ef‐fectively reduced with the introduction of perfluoro monomer .At the same time ,heat treat‐ment temperature also had a greater impact of the surface free energy .When the dosage of FEA was 38% ,the surface free energy was reduced to 12 .08 mJ/m2 ,and the films were pro‐vided with excellent heat and aging resistance properties .

关 键 词：聚丙烯酸酯 自乳化 全氟烷基 涂膜 表面性能 

分 类 号：TQ317.4[化学工程—高聚物工业]