酪素基纳米 TiO 2杂化乳液的制备及其涂层自清洁性能研究

摘要

Casein-based TiO 2 hybrid emulsion for coatings with self-cleaning property has been fabricated through double in-situ emulsion polymerization using caprolactam,acrylate and nano titanium dioxide.Struc-ture,morphology of the obtained latex and its film were characterized by TEM,AFM and SEM,while the self-cleaning property was measured by ultraviolet light.In this research,stability of the hybrid emulsion is the big-gest technical challenge due to the easy hydrolysis of TBOT.So,a series of casein-based TiO 2 hybrid emulsion by TBOT were prepared.The results showed that stability of emulsion was desirable.The particles with core-shell structure have uniform distribution and the formed coatings were endowed with obvious self-cleaning prop-erty when TBOT was 2%.More importantly,formation mechanism of resultant particles and its self-cleaning property were proposed accordingly.%以酪素为基材，采用双原位法向其中引入己内酰胺、丙烯酸酯和纳米二氧化钛(TiO 2)制备了可应用于皮革涂饰的酪素基纳米 TiO 2杂化乳液。并采用TEM、AFM、SEM 以及紫外光催化分别对乳胶粒的结构、形貌和涂层自清洁特性进行了测试与表征。控制好前驱体的水解速率，获得稳定的酪素基纳米 TiO 2杂化乳液是本研究的技术挑战。实验主要考察了钛酸丁酯用量对乳液稳定性的影响。结果表明，当钛酸丁酯用量为2％时，杂化乳液稳定。涂层具有较为明显的自清洁性能。最后，探讨了酪素基纳米 TiO 2杂化乳液的乳胶粒及涂层自清洁性能的形成机理。