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  

Synthesis of casein-based TiO_2 hybrid emulsion and its self-cleaning property

作　　者：徐群娜[1,2] 张帆[1,2] 马建中[1,2] 郭从盛[3] 陈滔[1] 

机构地区：[1]陕西科技大学资源与环境学院,西安710021 [2]陕西农产品加工技术研究院,西安710021 [3]陕西理工学院材料科学与工程学院,陕西汉中723001

出　　处：《功能材料》2015年第21期21069-21075,21080,共8页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21176149);陕西省自然科学基金资助项目(2014JQ2052);陕西省教育厅资助项目(14JK1087);陕西科技大学科研团队资助项目(TD12-03);陕西科技大学博士科研启动基金资助项目(BJ13-25)

摘　　要：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(TiO2)制备了可应用于皮革涂饰的酪素基纳米TiO2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TiO2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TiO2杂化乳液的乳胶粒及涂层自清洁性能的形成机理。Casein-based TiO2 hybrid emulsion for coatings with self-cleaning property has been fabricated through double in-situ emulsion polymerization using caprolactam,acrylate and nano titanium dioxide.Structure,morphology of the obtained latex and its film were characterized by TEM,AFM and SEM,while the selfcleaning property was measured by ultraviolet light.In this research,stability of the hybrid emulsion is the biggest technical challenge due to the easy hydrolysis of TBOT.So,a series of casein-based TiO2 hybrid emulsion by TBOT were prepared.The results showed that stability of emulsion was desirable.The particles with coreshell structure have uniform distribution and the formed coatings were endowed with obvious self-cleaning property when TBOT was 2%.More importantly,formation mechanism of resultant particles and its self-cleaning property were proposed accordingly.

关 键 词：酪素 自清洁 纳米二氧化钛(TiO2) 杂化乳液 

分 类 号：TQ314.1[化学工程—高聚物工业] TS544[轻工技术与工程—皮革化学与工程]