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    • 1. 发明公开
    • Process for producing aerogel
    • 维尔法赫尔·赫斯特伦
    • EP0849220A1
    • 1998-06-24
    • EP97120526.5
    • 1997-11-22
    • MATSUSHITA ELECTRIC WORKS, LTD.
    • Sonoda, KenjiYokogawa, HiroshiYokohama, MasaruTsubaki, Kenji
    • C01B33/158
    • C01B33/1585
    • There is provided a process for producing an aerogel which comprises lowering a pH of a water glass solution to obtain a sol, gelling the sol to obtain a hydrogel, replacing water in the gel with an organic solvent, reacting the gel with a hydrophobilizing agent having hydrophobic groups as well as functional groups reactive with silanol groups in liquid phase, followed by supercritically drying; or hydrophobilizing and supercritically drying the resultant gel at the same time. Preferably, the hydrogel is prepared by ion exchanging alkali metals in the water glass solution using an ion exchange resin to obtain a sol which is subjected to suspension polymerization.
    • 提供了一种制备气凝胶的方法,其包括降低水玻璃溶液的pH以获得溶胶,胶凝溶胶以获得水凝胶,用有机溶剂代替凝胶中的水,使凝胶与疏水化剂反应,所述疏水化剂具有 疏水基团以及与液相中的硅烷醇基反应的官能团,然后进行超临界干燥; 或同时疏水化和超临界干燥所得凝胶。 优选地,水凝胶通过使用离子交换树脂在水玻璃溶液中离子交换碱金属来制备,以获得进行悬浮聚合的溶胶。