高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (12): 2328-2336.doi: 10.7503/cjcu20170258

• 高分子化学 • 上一篇    下一篇

中空TiO2微球的制备及对聚丙烯酸酯薄膜性能的影响

鲍艳1,2(), 高敏1,2, 董雨菲1, 康巧玲1, 高智鹏1, 吴国栋1, 李妍1   

  1. 1. 陕西科技大学轻工科学与工程学院, 西安 710021
    2. 轻化工程国家级实验教学示范中心, 西安 710021
  • 收稿日期:2017-04-24 出版日期:2017-12-10 发布日期:2017-10-17
  • 作者简介:联系人简介: 鲍艳, 女, 博士, 教授, 主要从事纳米复合材料的研究. E-mail: baoyan0611@126.com
  • 基金资助:
    国家重点研发计划(批准号: 2017YFB0308602)、 陕西省大学生创新创业训练计划项目(批准号: 1330)和陕西科技大学科研创新团队项目(批准号: TD12-03)资助

Fabrication of Hollow TiO2 Spheres and Effect on Properties of Polyacrylate Film

BAO Yan1,2,*(), GAO Min1,2, DONG Yufei1, KANG Qiaoling1, GAO Zhipeng1, WU Guodong1, LI Yan1   

  1. 1. College of Bioresources Chemical and Materials Engineering, Xi’an 710021, China
    2. National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science and Technology, Xi’an 710021, China
  • Received:2017-04-24 Online:2017-12-10 Published:2017-10-17
  • Contact: BAO Yan E-mail:baoyan0611@126.com

摘要:

采用阳离子聚苯乙烯微球作为模板, 钛酸四丁酯为钛源, 氨水为催化剂, 制备了中空TiO2微球. 采用X射线衍射、 扫描电镜及比表面测定仪对其形貌和结构进行了表征, 并考察了模板粒径、 钛源用量以及催化剂用量对中空TiO2微球形貌的影响. 通过物理共混法将其引入至聚丙烯酸酯乳液中并成膜, 研究了复合薄膜的保温性能、 抗紫外性能及力学性能. 结果表明, 锐钛矿相中空TiO2微球模板粒径、 钛源用量以及催化剂用量影响中空TiO2微球的空心尺寸、 壁厚及壳层致密性. 中空TiO2微球可显著提升聚丙烯酸酯薄膜的保温性能、 抗紫外性能和力学性能. 采用不同粒径的模板制备的中空TiO2微球对复合薄膜的各项性能均有影响, 其中模板粒径为140 nm时复合薄膜性能最优, 光反射率提升63%, 导热系数降低27%, 且在波长小于360 nm范围内, 紫外透过率几乎为0, 抗张强度增加100%, 断裂伸长率提升62%.

关键词: 中空TiO2微球, 聚丙烯酸酯, 保温性能, 抗紫外性能, 力学性能

Abstract:

Hollow TiO2 spheres were prepared using cationic polystyrene microspheres as templates, tetrabutyl titanate as titanium source and ammonia as catalyst. The morphology and structure were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Brunauer-Emmett-Teller analysis. The influence of template size, titanium source and catalyst dosage on the morphology of hollow TiO2 spheres were studied. Then, the hollow TiO2 spheres were introduced into polyacrylate emulsion by physical blending method. The thermal insulation, UV-shielding and mechanical performance of composite films were investigated. As a result, the anatase phase hollow TiO2 spheres were obtained. The hollow size, thickness and compactness of the shell of hollow TiO2 spheres were influenced by the template size, titanium source and catalyst dosage. Hollow TiO2 spheres as filler can enhance the thermal insulation, UV-shielding and mechanical performance of polyacrylate film, significantly. At the same time, it was proved that the hollow TiO2 spheres prepared with different size templates have effects on the performance of the composite films. In which, the properties of the composite film containing the hollow TiO2 spheres prepared with template of 140 nm was optimal. The reflectivity was improved about 62.2%, the thermal conductivity was decreased by 17.71%, and the ultraviolet transmittance was almost zero under 390 nm wavelength.

Key words: Hollow TiO2 sphere, Polyacrylate, Thermal insulation property, Anti-ultraviolet property, Mechanical property

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