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    • 3. 发明公开
    • METHOD FOR PRODUCING SILICA AEROGEL
    • VERFAHREN ZUR HERSTELLUNG冯二氧化硅飞机
    • EP3127863A1
    • 2017-02-08
    • EP15774433.5
    • 2015-01-13
    • Panasonic Intellectual Property Management Co., Ltd.
    • KUGIMIYA, KazumaYAMADA, TakumasaANDO, Hideyuki
    • C01B33/16
    • C01B33/1585C01B33/155C01B33/16
    • A method for producing silica aerogel according to the present invention includes: a solation step of generating a sol by adding monoalkyltrialkoxysilane to an acidic aqueous solution containing silicic acid; and a gelation step of generating a wet gel by gelating the sol. Moreover, the production method includes a drying step of removing a solvent, which is contained in the wet gel, from the wet gel by drying the wet gel at less than a critical temperature of the solvent and at less than a critical pressure of the solvent. Then, the monoalkyltrialkoxysilane is added to the acidic aqueous solution so that an amount of silicon in the monoalkyltrialkoxysilane becomes 1 mol part or more with respect to 1 mol part of an amount of silicon in the acidic aqueous solution containing the silicic acid.
    • 根据本发明的二氧化硅气凝胶的制造方法包括:通过在含有硅酸的酸性水溶液中添加单烷基三烷氧基硅烷生成溶胶的固溶工序; 以及通过凝胶化溶胶产生湿凝胶的凝胶化步骤。 此外,制备方法包括干燥步骤,其通过在低于溶剂的临界温度下和在低于溶剂的临界压力下干燥湿凝胶从湿凝胶中除去湿凝胶中所含的溶剂 。 然后,将单烷基三烷氧基硅烷加入到酸性水溶液中,使得单烷基三烷氧基硅烷中的硅量相对于含有硅酸的酸性水溶液中的1mol的硅量为1mol以上。
    • 6. 发明公开
    • PROCESS FOR PRODUCING SILICA AEROGEL
    • 生产硅胶AIRGEL的方法
    • EP3147261A1
    • 2017-03-29
    • EP15796189.7
    • 2015-03-30
    • Panasonic Intellectual Property Management Co., Ltd.
    • KUGIMIYA, KazumaYAMADA, TakumasaANDO, Hideyuki
    • C01B33/16C01B33/158
    • C01B33/1585C01B33/155C01B33/163
    • A method for producing a silica aerogel includes a gelation step of adding a monoalkyltrialkoxysilane to an acidic aqueous solution containing a surfactant to prepare a sol, and then gelating the sol to prepare a wet gel. The method further includes a separation step of immersing the wet gel in a solvent mixture of a first solvent and a second solvent immiscible with the first solvent to move the surfactant contained in the wet gel to a phase of the second solvent while moving the wet gel to a phase of the first solvent. The first solvent has an E T N value of 0.5 or less, and the second solvent has an E T N value between those of the first solvent and water. The method further includes a drying step of drying the wet gel having moved to the phase of the first solvent in the separation step at a temperature lower than a critical temperature of the first solvent under a pressure lower than a critical pressure of the first solvent to remove the first solvent from the wet gel.
    • 作为二氧化硅气凝胶的制造方法,可举出在含有表面活性剂的酸性水溶液中添加单烷基三烷氧基硅烷来制备溶胶,然后使该溶胶凝胶化而制备湿凝胶的凝胶化工序。 该方法还包括分离步骤,将湿凝胶浸入第一溶剂和不与第一溶剂混溶的第二溶剂的溶剂混合物中,以将包含在湿凝胶中的表面活性剂移动到第二溶剂的相中,同时将湿凝胶 到第一溶剂的一个相。 第一溶剂具有0.5或更小的ETN值,第二溶剂具有介于第一溶剂和水之间的ETN值。 该方法还包括干燥步骤,该干燥步骤在低于第一溶剂的临界温度的温度下,在低于第一溶剂的临界压力的压力下,将已经移动至分离步骤中的第一溶剂的相的湿凝胶干燥至 从湿凝胶中除去第一溶剂。