Synthesis of window glazing coated with silica aerogel films via ambient drying
Synthesis of window glazing coated with silica aerogel films via ambient drying
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DOI：
10.1016/s0022-3093(03)00027-9
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发表时间：
2003-06-01
影响因子：
3.5
通讯作者：
Hyun, SH
中科院分区：
文献类型：
--
作者：
Kim, GS;Hyun, SH
为了合成涂有二氧化硅气凝胶膜的窗户玻璃，开发了一种环境干燥工艺（1atm, 270℃）。气凝胶膜可以通过在玻璃载玻片上浸渍/旋涂二氧化硅溶胶获得湿凝胶膜的方法来制造。干燥前将湿凝胶中的异丙醇溶剂与正庚烷交换，使干燥收缩最小化。的厚度。二氧化硅薄膜的折射率和孔隙率分别为0.16 ~ 10 μ m、1.08 ~ 1.09 μ m和80 ~ 84%。在气凝胶厚度为100 μ m （0.016 W/(mK)）时，窗户玻璃的最佳导热系数为0.2 W/(mK)。(C) 2003 Elsevier Science B.V.版权所有
An ambient drying process (1 atm, 270 degreesC) has been developed in order to synthesize window glazing coated with silica aerogel films. The aerogel film could be manufactured by this process of wet gel films obtained via a dip-/spin-coating of the silica sol on a glass slide. Before drying, the isoproponol solvent in wet gels was exchanged with n-heptane to minimize the drying shrinkage. The thickness. refractive index, and porosity of silica films were 0.16-10 mum, 1.08-1.09, and 80-84%, respectively. The transmittance of window glazing was over 90% and we could predict that the optimal thermal conductivity (0.2 W/(m K)) of the window glazing would be obtained at the aerogel thickness of 100 mum (0.016 W/(mK)). (C) 2003 Elsevier Science B.V. All rights reserved.