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Cation water-based nano silicon dioxide and preparation method and application thereof

A technology of nano-silica and cations, which is applied in the treatment of dyed low-molecular organic compounds, dyed organosilicon compounds, and fibrous fillers. It can solve problems affecting the stability and uniformity of dispersions, and achieve high stability, Effect of improving surface properties and high uniformity

Inactive Publication Date: 2010-12-15
NANTONG NAWEI DIGITAL MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the surface of nano-silica has a large number of hydroxyl groups, which absorbs water and has a high specific surface energy, which is prone to agglomeration or flocculation, which affects the stability and uniformity of the dispersion.

Method used

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  • Cation water-based nano silicon dioxide and preparation method and application thereof
  • Cation water-based nano silicon dioxide and preparation method and application thereof
  • Cation water-based nano silicon dioxide and preparation method and application thereof

Examples

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Embodiment 1

[0031] 1) Add 230 parts by weight of water in an open reactor at 5-40°C, then add 6 parts by weight of octadecyldimethylbenzyl ammonium chloride and 3 parts by weight of concentrated hydrochloric acid with a mass concentration of 37%, and stir 5 minutes to dissolve;

[0032] 2) Add 60 parts by weight of nano-silica micropowder with a particle size of 10-100 nm into the reactor, and stir at a high speed of 4000 r / min for 5 minutes to obtain a low-viscosity translucent solution;

[0033] 3) While stirring at high speed in step 2), add 6 parts by weight of aminosilane coupling agent dropwise into the reactor for 10 minutes;

[0034] 4) Adjust the pH value of the solution to 3-4 and continue to stir the solution for 10 minutes to obtain a translucent cationic water-based nano-silica (i.e. nano-silica dispersion), which can be placed at room temperature for more than 6 months without condensation glue.

[0035] The aminosilane coupling agent is 3-aminopropyltrimethoxysilane (or 3...

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Abstract

The invention discloses cation water-based nano silicon dioxide and preparation method and application thereof. When in preparation, water, octadecyl dimethyl benzyl ammonium chloride and concentrated hydrochloric acid are added into a reactor to be stirred and dissolved; nano silicon dioxide micro powder is added into the reactor, stirring is carried out, so as to obtain low viscosity semi-transparent solution, and aminosilane coupling agent is dropwise added into the reactor while stirring; the pH value of the solution is regulated to 3-4, and the solution is continuously stirred, so as to obtain semi-transparent cation water-based nano silicon dioxide. The invention provides a cation surfactant and an aminosilane coupling agent into water phase, the surface characteristic of nano silicon dioxide and rheological property of dispersion are effectively improved, a nano silicon dioxide water-based dispersion with low viscosity, high stability and high uniformity is obtained, and further a high light waterproof coating slurry can be prepared.

Description

Technical field: [0001] The invention relates to a nano-silica surface cationic modification product, a preparation method and an application. Background technique: [0002] Nanomaterials refer to materials with at least one dimension in the nanometer scale (1-100nm) in three-dimensional space. It is a new generation of materials composed of nanoparticles whose size is between atoms, molecules and macroscopic systems. The corresponding development of nanomaterials and nanotechnology is recognized as the most promising scientific research field in the 21st century. Nano-silica, also known as "ultrafine white carbon black", has the characteristics of small particle size, large specific surface area, high chemical purity, and good dispersion performance. At the same time, it has excellent stability, reinforcement, thickening and touch. Denaturation can improve the inherent physical and chemical properties of other materials or products. It is the "industrial monosodium glutama...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/12C09C3/08C09D7/12C09D129/04C09D5/00
Inventor 陆建辉姜剑华王玉丰
Owner NANTONG NAWEI DIGITAL MATERIAL TECH
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