Structural regulation of hollow spherical TiO2 by varying titanium source amount and their thermal insulation property
Structural regulation of hollow spherical TiO2 by varying titanium source amount and their thermal insulation property
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DOI：
10.1016/j.colsurfa.2017.10.019
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发表时间：
2018-01-20
影响因子：
5.2
通讯作者：
Ma, Jian Zhong
中科院分区：
文献类型：
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作者：
Bao, Yan;Kang, Qiao Ling;Ma, Jian Zhong
以丁醇钛(TBT)为钛源，无水乙醇为溶剂，采用无模板溶剂热法成功制备了空心球形二氧化钛。通过调节TBT用量，有效地控制了空心球形二氧化钛的空腔尺寸、壁厚和球径等结构参数。随着TBT加入量的增加，空心球形二氧化钛的球径增大，壁厚增加，空腔结构先膨胀后逐渐塌陷。中空球形二氧化钛由于其中空的结构和固有的性质，具有较高的光反射率和较低的导热系数，表现出优异的隔热性能。中空球形二氧化钛的结构参数对提高其隔热性能起着重要作用。此外，中空球形二氧化钛作为填料可以显著提高聚丙烯酸酯薄膜的隔热性能、紫外线屏蔽性能和力学性能。
Hollow spherical TiO2 were successfully fabricated through a template-free solvothermal route using TBT (titanium(IV)butoxide) as the titanium source and absolute ethanol as the solvent. The structural parameters like cavity size, wall thickness and overall sphere diameter of hollow spherical TiO2 were effectively controlled through tuning TBT amount. By increasing the amount of TBT, the overall sphere diameter and wall thickness of the hollow spherical TiO2 increased, the cavity structure first expanded and then gradually collapsed with the TBT increasing. Hollow spherical TiO2 possessed high light reflection and low thermal conductivity due to its hollow structure and the inherent properties, showing distinguished thermal insulation property. The structural parameters of hollow spherical TiO2 played an important role for improving of thermal insulation property. Moreover, hollow spherical TiO2 as fillers can significantly enhance the thermal insulation, UV-shielding and mechanical preformance of polyacrylate film.