纳米TiO_2改性聚醋酸乙烯酯—丙烯酸丁酯乳液的制备及其在高寒沙地固沙中的应用性能 Ⅰ纳米TiO_2改性聚醋酸乙烯酯—丙烯酸丁酯乳液的制备和表征  

Preparation and application properties of nano-TiO_2 modified polyvinyl acetate-butyl acrylate emulsion for sand-fixing at high altitude and low-temperature deserts Ⅰ Preparation and identification of nano-TiO_2 modified P(VAc/BA) emulsion

作　　者：张枝健 丁克毅[1] 陈华林 张瑜[1] 刘军[1] ZHANG Zhi-jian;DING Ke-yi;CHEN Hua-lin;ZHANG Yu;LIU Jun(School of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu 610041, P. R. C.)

机构地区：[1]西南民族大学化学与环境保护工程学院,四川成都610041

出　　处：《西南民族大学学报（自然科学版）》2018年第3期263-273,共11页Journal of Southwest Minzu University(Natural Science Edition)

基　　金："十三五"国家重点研发计划(2016YFC0500900)子课题"有机生物化学治沙材料研发及其应用"(2016YFC0500904);高分子材料工程国家重点实验室开放课题(sklpme2016-4-24)

摘　　要：用于高寒沙地的高分子固沙乳液需要有良好的抗冻融性和耐紫外老化性能.以醋酸乙烯酯和丙烯酸丁酯为主要原料,采用乳液聚合法合成聚醋酸乙烯酯—丙烯酸丁酯的共聚物P(VAc/BA)乳液,再以纳米Ti O2为抗紫外添加剂,制备得到改性的P(VAc/BA)固沙乳液.首先通过对不同工艺条件下合成的P(VAc/BA)乳液的主要物理性能参数,即粘度、粒径及粒径分布、玻璃化转变温度、固含量、冻融稳定性等的测试,来优化P(VAc/BA)乳液的合成路线,得到稳定的合成工艺;再通过对不同改性条件下得到的乳液进行粒径分析、紫外光谱分析、抗老化测试,得到最优的纳米Ti O2改性工艺.对目标产品的测试结果表明,这是一种水溶性好、粘度适中、冻融稳定性好、抗紫外老化、适宜于在川西北高寒沙地使用的固沙材料.Sand-fixing polymer emulsion applied at high altitude and low-temperature deserts needs good freeze-thaw stability and resistance to ultraviolet aging. A novel sand-fixing polymer emulsion named P（VAc/BA） ,with vinyl acetate and butyl acrylate as raw materials, and nano-TiO2 as ultraviolet resistant additives, was prepared. First, by analyzing the parameters of the emulsion, such as viscosity, particle diameter, particle size distribution, glass transition temperature, solid content and freeze-thaw stability, the synthetic route of P（VAc/BA） emulsion was optimized and a stable synthesis process was determined. Second, the modification process with nano-TiO2 was determined through particle size analysis, ultraviolet spectral analysis, anti-aging experiment. The detail investigation for the target product indicated that nano-TiO2 modified P（VAc/BA） emulsion was a good sandfixing polymer material for high altitude and low-temperature deserts, which possesses a good water solubility, excellent freezethaw stability, satisfactory resistance to ultraviolet aging, and suitable viscosity.

关 键 词：纳米TIO2 P(VAc/BA)乳液 高寒沙地 固沙 耐冻融 抗紫外 

分 类 号：O63[理学—高分子化学] TQ317[理学—化学]