Organically modified silica sol and preparation method thereof

A silica and organosilicon technology, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve problems such as non-aqueous systems that cannot be directly applied
CN103991876AActive Publication Date: 2014-08-20SHANGHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI UNIV
Publication Date
2014-08-20

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Abstract

The invention relates to an organically modified silica sol and a preparation method thereof. The preparation method comprises the steps: under stirring, adding organic silicon into an organic solvent to obtain a mixed solution A, wherein the molar ratio of organic silicon to the organic solvent is 1:7-12; under stirring, adding a silane coupling agent, POSS or a hyperbranched polymer, deionized water and a catalyst into the organic solvent, to obtain a mixed solution B, wherein the molar ratio of the modification agent (the hyperbranched polymer, the silane coupling agent or POSS), deionized water, the organic solvent and the catalyst is 1-10:45-55:150-170:0.01-1; under stirring, slowly dropwise adding the mixed solution A into the mixed solution B, transferring the mixed solution into a beaker, sealing a mouth with a parafilm, pricking a plurality of small holes on the parafilm, storing at the room temperature for 1-15 days, and thus obtaining the modified organic silicon sol. The organically modified silica sol and the preparation method thereof have the advantages of simple production process and lower manufacturing cost, the used solvent is the organic solvent, and the field of silica sol application is expanded.
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Description

technical field

[0001] The invention mainly relates to the preparation of silica sol modified by hyperbranched polymer, POSS or silane coupling agent in an organic system. Using this method, the uniform dispersion of nano-silica rigid particles in an organic solvent system can be realized in situ. Background technique

[0002] As a new type of material, nanomaterials will become the leading industry in the 21st century. Nano-silica sol is a colloid formed by the uniform diffusion of silica colloidal particles in a solvent. It is one of the most important colloidal materials in the sol-gel process and is widely used. Used in industries such as electronics, biology, rubber, coatings and ceramics. In recent years, nano-dioxide sol has also been applied in the field of medicine, such as toothpaste and drug delivery system. However, due to the small particle size, large specific surface area and high surface energy of nano-silica particles, nano-materials are easy to aggl...

Claims

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