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Nano-silica sol with novel structure

A nano-silica and nano-titanium dioxide technology, applied in the field of nano-silica sol, can solve the problems of uncontrollable particle size, unclear interface between particles, uncontrollable shape, etc., and achieve low cost, high mechanical strength, The effect of less impurities

Active Publication Date: 2017-05-10
湖北银河彩印包装有限公司
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  • Abstract
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Problems solved by technology

[0006] The purpose of the present invention is to provide a nano-silica sol body with a novel structure to improve the existing silica sol mainly existing in high impurity content, low concentration of silica, poor stability under acidic or neutral conditions, short service life, There are shortcomings such as variegated colors and few varieties
And solve the existing technical problems such as uncontrollable size and shape of silica sol particles, unclear interface between particles, etc.

Method used

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Embodiment Construction

[0016] The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

[0017] figure 1 It is a schematic diagram of the structure of nano-silica sol with a new structure, which is composed of figure 1 It can be seen that the shape of the material is spherical, including a three-layer composite capsule structure, wherein the innermost layer is a nano-titanium dioxide core 2, and the titanium dioxide core 2 is wrapped with a sodium metaaluminate capsule wall 3, and the diameter of the sodium metaaluminate capsule wall is 50- 100nm. The outermost layer of the capsule wall 3 coated with sodium metaaluminate is the capsule wall 1 composed of nano-silica sol, the diameter of the nano-silica particle is 20-24nm, and the diameter of the capsule wall 1 is 100-150nm. A plurality of nanoscale micropores 5 are arranged on the wall 1 of the nano silicon dioxide soluble capsule.

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Abstract

The invention discloses nano-silica sol with a novel structure for overcoming the defects existing in the existing silica sol such as high impurity content, low silica concentration, low stability in acidic or neutral conditions, short service cycle, presence of mixed colors, few varieties and the like. The technical problems that the size and morphology of the existing silica sol particles cannot be controlled, the interface among the particles is not clear and the like are solved. The nano-silica sol disclosed by the invention has the characteristics of low cost, heat resistance, solution resistance, barrier property, high mechanical strength, low impurity content, high silica concentration, high stability under acidic or neutral conditions, single color, long service cycle and the like.

Description

technical field [0001] The invention relates to a new material, in particular to a nano-silica sol with a new structure. Background technique [0002] Silica sol is a dispersion of silicon dioxide in water or other organic solvents, widely used in precision casting, refractory materials, coatings, textiles, precision polishing and other fields. Domestic silica sol production technologies mainly include ion exchange method and silica powder hydrolysis method. [0003] The production process of the silicon powder hydrolysis method is mainly to add water to the reaction kettle, add a basic catalyst, and after heating to a suitable temperature, add silicon powder, so that the silicon powder is hydrolyzed under alkali catalysis to generate silicic acid and polymerize into carbon dioxide. For silicon particles, the reaction lasts for a certain period of time. After the silicon powder basically reacts completely, the temperature of the reaction mixture is lowered, and finally filt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/14B82Y30/00
CPCC01B33/14C01P2004/64C01P2006/16
Inventor 郭翠芳
Owner 湖北银河彩印包装有限公司
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