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首页> 外国专利> METHOD FOR PRODUCING POROUS SILICA BASED PARTICLES AND POROUS SILICA BASED PARTICLES PRODUCED BY USING THE METHOD

METHOD FOR PRODUCING POROUS SILICA BASED PARTICLES AND POROUS SILICA BASED PARTICLES PRODUCED BY USING THE METHOD

机译：制备多孔二氧化硅基颗粒的方法和使用该方法制备的多孔二氧化硅基颗粒

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摘要

Provided is a method of producing porous silica-based particles with the relatively larger average diameter of 1 micron or more and also having a low particle density. The method comprises the steps of (a) preparing two-layer separated liquid consisting of an organic silicon compound layer and a water layer, then adding an organic solvent, an alkali, and a surfactant into the water layer while agitating at least the water layer so that the organic silicon compound layer and the water layer are not completely mixed with each other, further hydrolyzing and/or partial hydrolyzing the organic silicon compound in the mixed aqueous solution to prepare silica-based particle precursors, (b) adding sodium aluminate into the mixed aqueous solution containing the silica-based particle precursors and then preparing silica-based particles having pores, cavities or voids inside the particles, and (c) washing and drying the silica-based particles. Thus obtained particles are useful for various applications such as microcapsules, adsorbents, catalysts, low refractive film, low dielectric film and low reflectivity film.
机译：提供了一种生产具有1μm或更大的相对较大的平均直径并且还具有低颗粒密度的多孔二氧化硅基颗粒的方法。该方法包括以下步骤：（a）制备由有机硅化合物层和水层组成的两层分离的液体，然后在至少搅拌水层的同时向水层中添加有机溶剂，碱和表面活性剂。为了使有机硅化合物层和水层不完全彼此混合，在混合的水溶液中进一步水解和/或部分水解有机硅化合物以制备二氧化硅基颗粒前体，（b）将铝酸钠加入混合含有二氧化硅基颗粒前体的水溶液，然后制备在颗粒内部具有孔，腔或空隙的二氧化硅基颗粒，以及（c）洗涤和干燥二氧化硅基颗粒。如此获得的颗粒可用于各种应用，例如微胶囊，吸附剂，催化剂，低折射膜，低介电膜和低反射率膜。

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