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A kind of silicon dioxide with high dispersion stability and its preparation method and application

A silica and stability technology, applied in the direction of silica, silica, coating, etc., can solve the problems of limited application of water-based coatings, poor dispersion, fast settling speed, etc., to achieve easy purchase, low price, simple process Effect

Active Publication Date: 2019-04-05
江西宝弘纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a silica with high dispersion stability and its preparation method and application, which solves the problem that silica products in the prior art have poor dispersibility in water environment, and the sedimentation speed is fast, which limits its use in water-based coatings application problem

Method used

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  • A kind of silicon dioxide with high dispersion stability and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0033] Add 50g of silicon dioxide into the reactor, then add 0.5g (solid content) microcrystalline cellulose, add 500ml of deionized water and stir well, add 0.1mm diameter zirconium balls into the evenly stirred emulsion, and use 5000r / min The sanding time is 1 hour, and the liquid after sanding is spray-dried under the condition of 100r / min stirring, and the temperature is 200°C. The product is made into a solution of a certain concentration, and after standing for 1 day, turn over 20 results such as figure 1 shown.

Embodiment 2

[0035] Add 30g of silicon dioxide to the reactor, then add 1.0g (solid content) microcrystalline cellulose, add 500ml of deionized water and stir well, add 0.7mm diameter zirconium balls into the evenly stirred emulsion, and use 5000r / min The sanding speed is sanded, and the sanding time is 30min. The sanded liquid is spray-dried under the condition of 100r / min stirring, and the temperature is 150°C. The product is made into a solution of a certain concentration. results such as figure 1 shown.

Embodiment 3

[0037] Add 45g of silicon dioxide into the reactor, then add 0.5g (solid content) microcrystalline cellulose, add 500ml of deionized water and stir well, add 0.1mm diameter zirconium balls into the evenly stirred emulsion, use 5000r / min The sanding speed is sanded, and the sanding time is 50min. The liquid after sanding is spray-dried under the condition of 100r / min stirring, and the temperature is 180°C. The product is made into a solution of a certain concentration. results such as figure 1 shown.

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Abstract

The invention discloses a surface modification method of silicon dioxide with high dispersion stability. A preparation method of the silicon dioxide comprises steps as follows: a certain proportion of microcrystalline cellulose is added to an aqueous solution of silicon dioxide, the aqueous solution is subjected to high-speed sanding, and modified silicon dioxide matting powder is obtained through spray drying. Microcrystalline cellulose is added to the aqueous solution of silicon dioxide, high-speed sanding is performed, on one hand, particle sizes of silicon dioxide and microcrystalline cellulose are reduced, on the other hand, silicon dioxide and microcrystalline cellulose are well composited, so that silicon dioxide is well dispersed in the aqueous solution system, and the original pore structure of silicon dioxide can be kept unchanged in the final spray drying process.

Description

technical field [0001] The invention relates to a silicon dioxide and its preparation method and application, in particular to a silicon dioxide with high dispersion stability and its preparation method and application. Background technique [0002] Gas-phase method and precipitation method are currently important methods for producing nano-silica in China. The product prepared by gas-phase method has high purity, high dispersion, fine spherical particles, and few surface hydroxyl groups, so it has excellent reinforcing properties. However, the raw materials used are expensive, the equipment requirements are high, and the technology is complicated, which limits the application and promotion. [0003] The precipitation method has become the main method for producing nano-silica in China because of lower requirements on raw materials and equipment than the gas phase method. However, in terms of the current manufacturing process, there are still many process steps, the reaction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18C09D7/61
CPCC01B33/18C09D7/62
Inventor 徐前进刘坤吉
Owner 江西宝弘纳米科技有限公司