光固化水性聚氨酯有机硅改性丙烯酸酯的制备  

Preparation of Photocurable Waterborne Polyurethane Modified by Organosilicon Acrylate

作　　者：张定仑 刘瑾 沈云[1] 李真 覃忠琼 ZHANG Ding-lun;LIU Jin;SHEN Yun;LI Zhen;QIN Zhong-qiong(School of Materials Science and Chemical Engineering,Anhui Jianzhu University,Hefei 230601,China;Anhui Key Laboratory of Advanced Building Materials,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]安徽建筑大学材料与化学工程学院,合肥230601 [2]安徽建筑大学安徽省先进建筑材料重点实验室,合肥230601

出　　处：《合肥学院学报（综合版）》2021年第5期73-78,共6页Journal of Hefei University：Comprehensive ED

基　　金：安徽建筑大学自然科学研究项目“水性功能高分子材料的结构设计、合成与应用研究”(JY2021-C-050);安徽省先进建筑材料国际联合研究中心主任项目“PEG定形相变阻燃拒污建筑节能材料制备及其性能”(No.JZCL015ZZ)资助。

摘　　要：采用自乳化法制备乙烯基硅氧烷改性的可光固化水性聚氨酯丙烯酸酯复合乳液(WPUASi),在引入有机硅氧烷改善胶膜表面性能的同时,交联点数量的增加可提高乳液的光固化速率。将有机硅改性的乳液及胶膜进行透射电镜(TEM)、水接触角(CA)、粒度分布及Zeta电位分析等测试。结果表明,水性聚氨酯有机硅改性丙烯酸酯乳液的粒径从168.3nm减小到114.9nm,乳液可稳定储存6个月以上。乙烯基硅氧烷含量为10%时固化膜的水接触角为83.2°、吸水率为7.42%,耐水性优良。The photocurable waterborne polyurethane acrylate composite emulsion(WPUASi)modified by vinyl siloxane was prepared by self-emulsification method.The photocurable rate of WPUASi was increased with the addition of organosiloxane to improve the surface properties of the film and the number of crosslinking points increased.The silicone modified emulsion and film were tested by transmission electron microscopy(TEM),water contact angle(CA),particle size distribution and Zeta potential analysis.The results show that the particle size of silicone modified waterborne polyurethane acrylate emulsion decreases from 168.3nm to 114.9nm,and the emulsion can be stably stored for more than 6 months.When the content of vinyl siloxane is 10%,the water contact angle of the cured film is 83.2°,the water uptake rate is 7.42%,and the water resistance is excellent.

关 键 词：光固化 水性聚氨酯丙烯酸酯 乙烯基硅氧烷 核壳结构 

分 类 号：TQ322[化学工程—合成树脂塑料工业]