Silica aerogel (SA) particle was synthesized and characterized. The effects of silica content in silicic acid solution and molar ratio of trimethyl chlorosilane (TMCS)/pore water on silica aerogel physical characteristics such as surface area, pore volume, apparent density, and porosity were investigated. We observed that when the silica content increased from 4 to 7% of weight (wt%), the silica aerogel surface area increased from 628.5 m 2 /g to 914.4 m 2 /g and thereafter (>9%). When the molar ratio of TMCS/pore water increased from 0.1–0.4, the silica aerogel’s surface area increased from 816.8 m 2 /g to 924.1 m 2 /g. The highest silica aerogel surface area of 924.1 m 2 /g and porosity of 96.4% were achieved with a silica content in silicic acid of 7.011 wt% and TMCS/pore water of 0.4. Finally, silicon aerogel particles applied to water-based paint to improve the thermal insulation was about 1.2 °C with surrounding ambient temperature of 45 °C.

中文翻译：

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二氧化硅气凝胶颗粒的合成及其在保温涂料中的应用

合成并表征了二氧化硅气凝胶（SA）颗粒。研究了硅酸溶液中的二氧化硅含量和三甲基氯硅烷 (TMCS)/孔隙水的摩尔比对二氧化硅气凝胶物理特性如表面积、孔体积、表观密度和孔隙率的影响。我们观察到，当二氧化硅含量从重量（wt%）的 4% 增加到 7% 时，二氧化硅气凝胶表面积从 628.5 m 2 /g 增加到 914.4 m 2 /g，此后（> 9%）。当TMCS/孔隙水的摩尔比从0.1-0.4增加时，二氧化硅气凝胶的表面积从816.8 m 2 /g增加到924.1 m 2 /g。最高的二氧化硅气凝胶表面积为 924.1 m 2 /g，孔隙率为 96.4%，硅酸中的二氧化硅含量为 7.011 wt%，TMCS/孔隙水为 0.4。最后，