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Ｓｉ Ｏ２ 气凝胶是一种新型轻质纳米多孔泡沫材料， 本文以正硅酸乙酯（ Ｔ Ｅ Ｏ Ｓ） 为原料， 以乙醇为溶剂， 以 Ｈ Ｆ 为催化剂用溶胶凝胶法快速制备出了 Ｓｉ Ｏ２ 气凝胶 Ｈ Ｆ的加入大大加速了溶胶凝胶反应速度， 使凝胶时间减少至几分钟甚至更短； 同时使凝胶温度降低至室温 Ｂ Ｅ Ｔ 及 Ｔ Ｅ Ｍ 测试结果表明所制备的 Ｓｉ Ｏ２ 气凝胶具有大比表面积（６７３８ｍ ２ｇ － １） 、纳米多孔结构（ 骨架颗粒为几纳米，孔洞尺寸为５ ～３０ｎｍ）
Si O2 airgel is a new type of lightweight nanoporous foam material. In this paper, tetraethyl orthosilicate (T E O S) as raw material, ethanol as solvent, H F as a catalyst for rapid preparation by sol-gel method The addition of Si O2 airgel ½ H F greatly accelerates the sol-gel reaction, reducing the gel time to a few minutes or less, while reducing the gel temperature to room temperature Β B E T and T E M The test results show that the prepared Si O2 airgel has a large specific surface area (673 8m 2 g - 1), a nano - porous structure (skeleton particles of several nanometers, pore size of 5 ~ 30nm)