Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing monodisperse silicon dioxide nanoparticle sol for paint

A technology of silicon dioxide and nano silicon dioxide, applied in chemical instruments and methods, coatings, inorganic chemistry, etc., can solve the problems of complex process, large particle size dispersion size of nanoparticles, affecting dispersion effect, etc. The effect of uniform distribution, improved dispersion and convenient application

Inactive Publication Date: 2014-08-06
CHERY AUTOMOBILE CO LTD
View PDF1 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the current existing technology: it is difficult to disperse to the nanometer level and ensure a uniform dispersion effect by using the nano-powder mechanical dispersion preparation technology, and this preparation technology cannot inhibit the re-agglomeration of the dispersed particles at all; The method of redispersing silica sol into the coating, but the process is complicated and consumes a lot of energy
However, the particle size dispersion scale of the nanoparticles obtained by the existing sol-gel method for preparing nano-silica is too large, which affects the dispersion effect after mixing with the coating system.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The present embodiment provides a kind of preparation method of monodisperse nano silica sol for coating, comprises the following steps:

[0020] Add 5.5ml of tetraethyl orthosilicate and 2ml of distilled water into 80ml of ethanol, and ultrasonically disperse to obtain a mixed solution. Dissolve 4.5ml of 25wt% saturated ammonia solution in 20ml of ethanol, and add it to the above at a constant speed of 3ml / min. In the mixed solution, keep the reaction temperature at 23~30°C during the reaction, and keep ultrasonicating during the reaction process, the ultrasonic frequency is 28KHz; the reaction time is 3 hours, and the nano The silica sol with a particle content of about 2.5wt% has a particle size of 2~20nm.

[0021] Dissolve 2.5 g of silica sol in 2.5 g of ethanol, add 0.25 g of nonionic surfactant polyoxyethylene alkylphenol ether, and stir evenly to obtain a monodisperse nano-silica sol.

[0022] Modified acrylic polyurethane varnish with monodisperse nano-silica ...

Embodiment 2

[0024] The present embodiment provides a preparation method of monodisperse nano silica gel for coating, comprising the following steps:

[0025] Add 7.5ml of tetraethyl orthosilicate and 4ml of distilled water to 70ml of acetone and mix, ultrasonically disperse to obtain a mixed solution, dissolve 6.5ml of 25wt% saturated ammonia solution in 20ml of acetone, and add it to the above mixing solution at a constant speed of 3ml / min solution, keep the reaction temperature at 23~30°C during the reaction process, and ultrasonic frequency is 28KHz during the reaction process; the reaction time is 3 hours, and the nano The silica sol with a particle content of about 4.7wt% has a particle size of 2-20nm.

[0026] Dissolve 2.5 g of silica sol in 2.5 g of acetone, add 0.25 g of nonionic surfactant polyoxypropylene glycerol ether and stir evenly to obtain a transparent monodisperse nano-silica sol.

[0027] Modified varnish with monodisperse nano-silica sol, according to the specific co...

Embodiment 3

[0029] The present embodiment provides a preparation method of monodisperse nano silica gel for coating, comprising the following steps:

[0030] Add 5.5ml of tetraethyl orthosilicate and 20ml of distilled water to 55ml of ethanol, mix them, and ultrasonically disperse to obtain a mixed solution. Dissolve 4ml, 25wt% saturated ammonia solution in 20ml of ethanol, and add it to the above mixed solution at a constant speed of 3ml / min During the process, the reaction temperature was kept at 23~30°C, and the ultrasonic frequency was 28KHz during the reaction process; the reaction time was 3 hours, and the nano Silica sol with a content of about 2.08wt% and a particle size of 2-20nm.

[0031] Dissolve 2.5 g of silica sol in 2.5 g of ethanol, add 0.25 g of nonionic surfactant polyoxypropylene glycerol ether and stir evenly to obtain a transparent monodisperse nano-silica sol.

[0032] Modified water-based wood lacquer with monodisperse nano-silica sol, according to the specific com...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing a monodisperse silicon dioxide nanoparticle sol for paint, which comprises the following steps: with tetraethyl orthosilicate as a precursor, preparing the mixture of a nanometer silicon dioxide sol and a surfactant by an ultrasonic means, and with the mixture of the nanometer silicon dioxide sol and the surfactant as a primary component, obtaining a nanometer silicon dioxid organic sol and a hydrosol, which have a uniform dispersion particle size and a small dispersion size. The monodisperse silicon dioxide nanoparticle sol is colorless and transparent, extends a new application scope for the paint and improves the dispersion of nano particles in the paint, thereby improving the performance and the quality of the paint.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to the field of preparation and application of monodisperse nano-silica sol for coatings. Background technique [0002] Inorganic nanoparticles have special optical, electrical, and surface active properties. Among them, nano-silica particles have the characteristics of small particles and large specific surface area, and are widely used in the field of coatings due to their superior hydrophilicity, stability, reinforcement, thickening, thixotropy and extinction. However, due to the small particle size and large specific surface area and surface tension of inorganic nanoparticles, they are easily adsorbed and agglomerated to form aggregates and agglomerates. Therefore, improving the dispersion of silica nanoparticles in coatings is particularly important for silica-modified coatings. It is necessary to control the re-aggregation mode and state of nanoparticles to avoid self-a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01B33/145C09D7/12
Inventor 洪丽熊建民陈大华
Owner CHERY AUTOMOBILE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com