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Thermal insulation and hydrophobization of wood impregnated with silica aerogel powder
Journal of Wood Science ( IF 2.9 ) Pub Date : 2020-11-23 , DOI: 10.1186/s10086-020-01927-7
Hong Chen , Yutian Zhang , Tuhua Zhong , Zhihui Wu , Xianxu Zhan , Jiaoyou Ye

The aim of the study was to develop a simple and cost-effective method to improve thermal insulation and hydrophobicity of wood. Herein, we attempted to use commercially available silica aerogel powders suspended in ethanol to treat the wood by a simple vacuum impregnation process. The effects of particle size (20 µm and 40 nm) of silica aerogels and the number of impregnation cycles (1, 3, and 5 cycles) were examined on the thermal conductivity and the surface hydrophobicity. The results showed that the thermal conductivity of silica aerogel-impregnated wood decreased by approximately 38%. The water contact angle of the impregnated wood increased up to the maximum values 153° with a comparison with 80° of the untreated wood, indicating effective hydrophobization after silica aerogel impregnation. The tensile properties of the impregnated wood were found slightly improved. The results indicate that the impregnation of silica aerogel powders in wood can be a facile and efficient approach to prepare wood with thermal insulation and hydrophobicity, which may hold great promise to be employed in manufacturing wood-based materials used in interior decoration and buildings.

中文翻译:

二氧化硅气凝胶粉浸渍木材的隔热和疏水化

该研究的目的是开发一种简单且具有成本效益的方法来改善木材的隔热性和疏水性。在本文中,我们尝试使用悬浮在乙醇中的市售二氧化硅气凝胶粉末通过简单的真空浸渍工艺来处理木材。研究了二氧化硅气凝胶的粒径(20 µm和40 nm)和浸渍循环次数(1、3和5个循环)对导热率和表面疏水性的影响。结果表明,二氧化硅气凝胶浸渍的木材的热导率降低了约38%。与未处理的木材的80°相比,浸渍的木材的水接触角增加到最大值153°,表明在二氧化硅气凝胶浸渍后有效的疏水化作用。发现浸渍木材的拉伸性能略有改善。结果表明,将二氧化硅气凝胶粉末浸渍在木材中可以是一种制备具有隔热和疏水性的木材的简便有效的方法,这对于在制造用于室内装饰和建筑的木质材料中具有广阔的前景。
更新日期:2020-11-23
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