Method for preparing anti-ultraviolet nano zinc oxide composite powder

A technology of nano-zinc oxide powder and nano-zinc oxide, applied in the direction of dyeing organosilicon compound treatment, fibrous filler, etc., can solve the problems of limiting the scope of use, limiting the application effect of zinc oxide, high cost, reducing photocatalytic activity, excellent Long-term stability, prevention of premature aging

Inactive Publication Date: 2007-08-29
SHANGHAI UNIV +1
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] U.S. Patent No. 5,486,631 discloses a method for organosilicon-poly-nano-zinc oxide, which obtains a stable, lipophilic composite powder. However, the method uses a single substance to coat the composite powder. Strong, which limits its scope of use, and the process is also more complicated
[0006] Chinese patent CN1398923, which discloses a modified ultrafine zinc oxide and its preparation method, wherein the modified ultrafine zinc oxide is added in the process of distilling ammonia produced by the alkaline method or after the zinc oxide is produced. Modified ultrafine zinc oxide can be obtained by using a new polymer dispersant, or a coupling agent with an amphoteric structure, but it is coated with a single substance, which limits the actual application effect of zinc oxide
[0007] Chinese patent CN1260366, the patent reported the use of ultrasonic microemulsion method to prepare nano-zinc oxide ultraviolet shielding material, which is made by modifying the surface of nano-zinc oxide doped with magnesium oxide and coated with non-ionic surfactant. Emulsion method, high cost, difficult to mass-produce
But it is difficult to disperse evenly in lipophilic matrix
[0010] Chinese patent CN1659223A discloses a preparation method of zinc oxide fine particle powder coated with silicon dioxide containing surface Zengshui, wherein the average primary particle size of the powder is 5-120nm, and the particle size range is too wide, so it is difficult to determine the optimal particle size during use. particle size; in addition, organic solvents such as tetramethoxy and tetraethoxysilane are used to produce silicic acid, which is costly and easy to pollute
[0011] Most of the above-mentioned methods are costly and difficult to promote in large-scale industrialization; most of these methods are coated with a single substance, which cannot satisfy the stability and compatibility of nano-zinc oxide with the oily matrix of cosmetics, paints, paints, fibers, films and other materials.

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

[0022] Add 2g of polyethylene glycol dispersant and 150g of zinc oxide with a particle size of 10-20nm in 850ml of deionized water, stir at a high speed at room temperature and disperse to make a slurry; for 30 minutes. Then put the above slurry in a 2000ml beaker, add 250ml of sodium silicate solution with a concentration of 1mol / L, stir evenly, and heat up to 60°C; then slowly add dilute sulfuric acid with a concentration of 10% to adjust the concentration of the solution. The pH value was 10, and the temperature was maintained at 60° C. for 1 hour. Then add 15g of simethicone oil, stir at a high speed, and keep a constant temperature at 60°C for 30 minutes under stirring; the speed of the mixer is 5000rpm; then wash, and wash with deionized water until there is no SO 4 2- Ions exist; after drying at 120°C for 12 hours, they are pulverized to finally obtain nano-zinc oxide composite powder.

[0023] The above powder was made into a 0.02% solution, ultrasonically dispersed...

Embodiment 2

[0025] Add 2g of triethanolammonium dispersant and 200g of zinc oxide with a particle size of 20 to 30nm in 1000ml of deionized water, stir at a high speed at room temperature and disperse to make a slurry; the speed of the high-speed mixer is 5000rpm, and the stirring and dispersing time is 1 hour. Then put the above slurry in a 2000ml beaker, add 300ml of sodium silicate solution with a concentration of 1mol / L, stir evenly, and heat up to 60°C; then slowly add dilute sulfuric acid with a concentration of 10% to adjust the concentration of the solution. The pH value was 10, and the temperature was maintained at 60° C. for 1 hour. Then add 15g of simethicone oil, stir at a high speed, and keep a constant temperature at 60°C for 1 hour under stirring; the speed of the mixer is 5000rpm; then wash, and wash with deionized water until there is no SO 4 2- Ions exist; after drying at 120°C for 24 hours, they are pulverized to finally obtain nano-zinc oxide composite powder.

[00...

Embodiment 3

[0028] Add 5g of polyvinyl alcohol dispersant and 200g of zinc oxide with a particle size of 20 to 40nm in 1000ml of deionized water, stir at a high speed at room temperature and disperse to make a slurry; the speed of the high-speed mixer is 5000rpm, and the stirring and dispersing time is 40 minutes. Then put the above slurry in a 2000ml beaker, add 300ml of potassium silicate solution with a concentration of 0.5ml / L, stir evenly, and heat up to 80°C; then slowly add dilute sulfuric acid with a concentration of 15% dropwise to adjust the solution The pH value was 9.0, and the temperature was maintained at 80°C for 1.5 hours. Then add 40g of simethicone, stir at a high speed, and keep a constant temperature at 80°C for 1 hour under stirring; the speed of the mixer is 3000rpm; then wash, and wash with deionized water until there is no SO 4 2- Ions exist; after drying at 120°C for 12 hours, they are pulverized to finally obtain nano-zinc oxide composite powder.

[0029] The ...

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
particle diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention relates to a manufacture method for an anti-ultraviolet nanometer zinc oxide compound powder. It includes the following steps: mixing nanometer zinc oxide powder with dispersing agent, and deionized water; using silicate as raw material, by controlling the pH value of reacting liquid, taking silicon dioxide surface modification; taking organic modification to the surface, after washing and drying, the nanometer zinc oxide compound powder would be gained. The invention has the advantages of simple technology, low cost, strong repeatability, etc. It has bright application prospect.

Description

technical field [0001] The invention relates to a preparation method of an anti-ultraviolet nano-zinc oxide composite powder, which belongs to the technical field of preparation technology of an anti-ultraviolet inorganic-organic composite powder material. Background technique [0002] As we all know, nano-zinc oxide, titanium dioxide, and red iron oxide can all be used as inorganic compounds for ultraviolet shielding agents; especially nano-zinc oxide, because it is white in itself, simple in coloring, and has strong ability to absorb ultraviolet rays, it is effective against UVA, UB and UVC. Shielding effect, and thus widely used. In addition, nano-zinc oxide is also an excellent anti-aging agent to significantly improve the aging resistance of coatings, paints, fibers, and films. It is a potential anti-ultraviolet aging agent. [0003] However, the nano-zinc oxide particles have high surface energy, are in a thermodynamically unstable state, and are prone to agglomeratio...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/12C09C1/04
Inventor 施利毅马书蕊冯欣张大为张剑平
Owner SHANGHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap