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Preparation method of high-dispersibility silicon dioxide micro-powder

A technology of silica and high dispersion, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of powder agglomeration and uneven particle size

Inactive Publication Date: 2018-09-14
FOSHAN GAOMING DISTRICT ZHUAHE NEW MATERIAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a highly dispersible silicon dioxide micropowder, aiming at the problems of serious powder agglomeration and non-uniform particle size in the preparation process of the current common silica powder preparation method. The preparation method of silicon micropowder

Method used

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Embodiment Construction

[0020] According to the mass ratio of 100:1, mix pig blood and sodium citrate into a horizontal centrifuge, centrifuge at a speed of 4000-4500r / min at 2-4°C for 10-15min, separate and obtain the lower precipitate, and use The mass fraction is 0.7% sodium chloride solution to wash the sediment to obtain the pig blood sediment; the pig blood sediment and the hydrochloric acid with the mass fraction of 15% are mixed in a volume ratio of 20:1 and put into an ultrasonic oscillator to 25-30kHz frequency ultrasonic oscillation reaction for 1-2 hours to obtain the reaction liquid, then adjust the pH to 7.5-8.0 with ammonia water with a mass fraction of 30%, continue to stir the reaction for 3-5 hours, filter and separate the filter residue to obtain the filtrate; combine the filtrate and 1,3-Propyl sultone is mixed in a mass ratio of 2:1 and put into a flask with a stirrer, then move the flask into an oil bath, heat up to 90-100°C, start the stirrer to Stir the etherification reaction...

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Abstract

The invention relates to the technical field of preparation of silicon micro-powder and particularly relates to a preparation method of high-dispersibility silicon dioxide micro-powder. The preparation method comprises the following steps: firstly, taking animal blood as a raw material, and performing enzymolysis and heating to remove impure protein to obtain biomass extract rich in heme iron; reducing the heme iron to ferrous ions with hydrochloric acid to obtain protein reaction liquid rich in ferrous ions; then, precipitating parts of ferrous ions with ammonium hydroxide, performing etherification reaction with hydroxyl in the reaction liquid through an etherifying agent, and introducing a propyl sulfonate group into the reaction liquid to obtain home-made functional liquid; and addingthe home-made functional liquid to the reaction liquid of sodium silicate and hydrochloric acid to finally obtain the high-dispersibility silicon dioxide micro-powder. The prepared silicon dioxide micro-powder has excellent dispersibility, is not easy to agglomerate, is uniform in particle size and has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of silica powder preparation, in particular to a preparation method of highly dispersible silica micropowder. Background technique [0002] As one of the powder materials with the highest production output in the world, silica micropowder has been widely used in the fields of electronics, rubber, coatings and resin composite materials due to its non-toxic, tasteless, pollution-free, low density and high specific surface properties. a wide range of applications. [0003] Since Stober et al. synthesized monodisperse silica with tetraethyl orthosilicate (TEOS) as the silicon source and ammonia water as the catalyst in the alcohol-water system, many scholars have carried out in-depth research on its preparation method and reaction mechanism, and proposed Reaction mechanisms such as single-molecule superposition growth, surface reaction-controlled growth, and diffusion-controlled growth. The silicon dioxide pre...

Claims

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Application Information

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IPC IPC(8): C01B33/193B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B33/193C01P2004/64
Inventor 胡次兵张晶
Owner FOSHAN GAOMING DISTRICT ZHUAHE NEW MATERIAL TECH CO LTD
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