Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Silicon dioxide aerogel composite material and preparation method thereof
The invention discloses a silicon dioxide aerogel composite material and a preparation method thereof, and relates to the field of materials. The preparation method comprises the following steps: putting micron-sized silicon dioxide aerogel, nano-sized fumed silica and grinding balls into a ball milling tank, performing ball milling for 3-10 min under the conditions that the autorotation speed ofthe ball milling tank is 40-100 r/min and the revolution speed is 40-100 r/min, and performing compression molding. The preparation method is simple, and convenient to operate; and meanwhile, part ofgaps, with the sizes far larger than the mesoporous range (2-50 nm), in the surface of the micron-sized silicon dioxide aerogel are blocked by the fumed silica nanoparticles, and stacking gaps among silicon dioxide aerogel powder particles are also filled with the fumed silica nanoparticles, so compared with traditional silicon dioxide aerogel powder or composite felt materials, the composite material of the invention has pore distribution more concentrated in the mesoporous range (2-50 nm), effectively inhibits convective heat transfer of gas in the material and reduces the heat conductivitycoefficient.
一种二氧化硅气凝胶复合材料及其制备方法，涉及材料领域。制备方法包括：将微米级二氧化硅气凝胶、纳米级气相法二氧化硅与研磨球放置于球磨罐内，在球磨罐的自转转速为40‑100r/min、公转转速为40‑100r/min的条件下球磨3‑10min，压制成型；不仅制备方法简单，便于操作，同时使微米级二氧化硅气凝胶的表面上尺寸远超出介孔范围(2‑50nm)的部分空隙由气相法二氧化硅纳米颗粒封堵、二氧化硅气凝胶粉体颗粒之间的堆积间隙也由气相法二氧化硅纳米颗粒填充，与传统二氧化硅气凝胶粉体或复合毡材相比，具有更集中于介孔范围(2‑50nm)的孔隙分布，同时有效抑制材料内气体对流传热，降低导热系数。
Silicon dioxide aerogel composite material and preparation method thereof
The invention discloses a silicon dioxide aerogel composite material and a preparation method thereof, and relates to the field of materials. The preparation method comprises the following steps: putting micron-sized silicon dioxide aerogel, nano-sized fumed silica and grinding balls into a ball milling tank, performing ball milling for 3-10 min under the conditions that the autorotation speed ofthe ball milling tank is 40-100 r/min and the revolution speed is 40-100 r/min, and performing compression molding. The preparation method is simple, and convenient to operate; and meanwhile, part ofgaps, with the sizes far larger than the mesoporous range (2-50 nm), in the surface of the micron-sized silicon dioxide aerogel are blocked by the fumed silica nanoparticles, and stacking gaps among silicon dioxide aerogel powder particles are also filled with the fumed silica nanoparticles, so compared with traditional silicon dioxide aerogel powder or composite felt materials, the composite material of the invention has pore distribution more concentrated in the mesoporous range (2-50 nm), effectively inhibits convective heat transfer of gas in the material and reduces the heat conductivitycoefficient.
一种二氧化硅气凝胶复合材料及其制备方法，涉及材料领域。制备方法包括：将微米级二氧化硅气凝胶、纳米级气相法二氧化硅与研磨球放置于球磨罐内，在球磨罐的自转转速为40‑100r/min、公转转速为40‑100r/min的条件下球磨3‑10min，压制成型；不仅制备方法简单，便于操作，同时使微米级二氧化硅气凝胶的表面上尺寸远超出介孔范围(2‑50nm)的部分空隙由气相法二氧化硅纳米颗粒封堵、二氧化硅气凝胶粉体颗粒之间的堆积间隙也由气相法二氧化硅纳米颗粒填充，与传统二氧化硅气凝胶粉体或复合毡材相比，具有更集中于介孔范围(2‑50nm)的孔隙分布，同时有效抑制材料内气体对流传热，降低导热系数。
Silicon dioxide aerogel composite material and preparation method thereof
一种二氧化硅气凝胶复合材料及其制备方法
WEI LILAI (Autor:in) / CHEN DEDONG (Autor:in) / DU LINHAI (Autor:in)
01.12.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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