Abstract

The main application of silica aerogel is as an insulating material. However, basic forms of silica aerogel have limited application. Silica aerogel can be embedded in fibrous materials to achieve a mechanically reinforced and continuous form. This aerogel blanket can be easily used in many applications. In this study, a silica aerogel blanket has been fabricated through sol–gel process. Aerogel precursors undergo the synthesis steps within the fibreglass matric. The thermal conductivity of the fabricated aerogel blanket was 0.021–0.077 W m⁻¹ K⁻¹ over 20–600°C. The blankets were hydrophobic with a contact angle of 138°. The linear length shrinkage and linear width shrinkage were obtained at 0.12 and 0.22%, respectively. Values of compressive resistance of blankets were 149, 549 and 1700 kPa for 30, 50 and 70% deformation, respectively. The results of hot surface performance, flexibility or rigidity, maximum exothermic temperature rise, and resistance to vibration analyses confirm the excellent thermal and mechanical performance of the fabricated aerogel blankets.

中文翻译：

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优良隔热材料二氧化硅气凝胶毡的制备及表征

摘要

二氧化硅气凝胶的主要应用是作为绝缘材料。然而，二氧化硅气凝胶的基本形式的应用有限。二氧化硅气凝胶可以嵌入纤维材料中以实现机械增强和连续的形式。这种气凝胶毯可轻松用于许多应用。在这项研究中，通过溶胶-凝胶工艺制造了二氧化硅气凝胶毯。气凝胶前体在玻璃纤维基质内经历合成步骤。所制造的气凝胶毯的导热系数在20-600°C范围内为0.021-0.077 W m ^-1 K ^-1。毯子是疏水性的，接触角为 138°。线长度收缩率和线宽度收缩率分别为0.12%和0.22%。对于30%、50%和70%变形，毯子的抗压阻力值分别为149、549和1700 kPa。热表面性能、柔性或刚性、最大放热温升和抗振动分析的结果证实了所制造的气凝胶毯具有优异的热性能和机械性能。