High-viscosity silica sol and preparation method thereof

A technology of silica sol and high viscosity, applied in the field of nanomaterials, can solve the problems of heavy metal pollution, high cost of metal modifiers, low viscosity of silica sol, etc., and achieve the effect of increasing repulsion and low cost

Inactive Publication Date: 2017-01-25
强新正品(苏州)环保材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic modifiers are mainly silane coupling agents, but silane coupling agents will undergo severe hydrolysis and condensation reactions in water, resulting in gel formation; metal modifiers are commonly used aluminum, tin, zinc and lead, but met

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing high-viscosity silica sol, comprising the following steps:

[0023] S01, configure the humic acid solution, and then adjust the acid-base to make the pH to 6;

[0024] S02, adding the humic acid solution obtained in S01 dropwise into the silica sol solution and stirring to form a humic acid / silica sol mixed system;

[0025] S03, after filtering the humic acid / silica sol mixed system obtained in S02, washing with absolute ethanol, and finally re-adding the filtered mixture into the hydroxyethyl cellulose solution to disperse to obtain a high-viscosity silica sol.

[0026] The concentration of the silica sol solution is 30wt%.

[0027] The humic acid is extracted from soil organic matter or water body organic matter.

[0028] The acid for the acid-base adjustment includes dilute hydrochloric acid or dilute nitric acid, and the base for the acid-base adjustment includes sodium hydroxide.

[0029] The concentration of the humic acid is 1000mg / L.

...

Embodiment 2

[0036] A method for preparing high-viscosity silica sol, comprising the following steps:

[0037] S01, configure the humic acid solution, and then adjust the acid-base to make the pH 8;

[0038] S02, adding the humic acid solution obtained in S01 dropwise into the silica sol solution and stirring to form a humic acid / silica sol mixed system;

[0039] S03, after filtering the humic acid / silica sol mixed system obtained in S02, washing with absolute ethanol, and finally re-adding the filtered mixture into the hydroxyethyl cellulose solution to disperse to obtain a high-viscosity silica sol.

[0040] The concentration of the silica sol solution is 40wt%.

[0041] The humic acid is extracted from soil organic matter or water body organic matter.

[0042] The acid for the acid-base adjustment includes dilute hydrochloric acid or dilute nitric acid, and the base for the acid-base adjustment includes sodium hydroxide.

[0043] The concentration of the humic acid is 2000mg / L.

[0...

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PUM

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Abstract

The invention discloses a preparation method of a high-viscosity silica sol. The method comprises the following steps: S01. preparing a humic acid solution, and regulating the pH value to 6-8 with an acid or alkali; S02. dropwisely adding the humic acid solution obtained in the S01 into the silica sol solution, and stirring and mixing to form a humic acid/silica sol mixed system; and S03. filtering the humic acid/silica sol mixed system obtained in the S02, washing with anhydrous ethanol, and finally, dispersing the filtered mixture into a hydroxyethyl cellulose solution to obtain the high-viscosity silica sol. The viscosity of the silica sol is greatly enhanced; the SiO2 particles are uniformly dispersed in the polymer emulsion; and the product has the characteristics of cost saving and environment friendliness.

Description

technical field [0001] The invention relates to a high-viscosity silica sol and a preparation method thereof, belonging to the technical field of nanometer materials. Background technique [0002] Silica sol is a dispersion of nano-scale silica particles in water or solvents. It has the characteristics of large specific surface area, high temperature resistance, and oxidation resistance. It is an ideal polymer emulsion enhancer. [0003] strong material. Due to the nano-SiO in silica sol 2 There are a large number of hydroxyl groups on the surface of the particles, which need to be hydrophobically modified to make SiO 2 The particles can be uniformly dispersed in the polymer emulsion. So far, the main modifiers mainly include organic modifiers and metal modifiers. Organic modifiers are mainly silane coupling agents, but silane coupling agents will undergo severe hydrolysis and condensation reactions in water, resulting in gel formation; metal modifiers are commonly used ...

Claims

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Application Information

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IPC IPC(8): C08L1/28C08L99/00C08K3/36
CPCC08L1/284C08K2201/011C08L99/00C08K3/36
Inventor 闫森源
Owner 强新正品(苏州)环保材料科技有限公司
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