Check patentability & draft patents in minutes with Patsnap Eureka AI!

Surface modification method of nano ZnO and application of nano ZnO in sunscreen cosmetics

A technology for surface modification and cosmetics, applied in the field of surface modification of nanomaterials, can solve problems such as prolonging the service life of sunscreen cosmetics, and achieve the effect of improving application performance and expanding application scope.

Active Publication Date: 2022-04-05
广州柏为科技有限公司
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the existing problems in the background technology, the present invention provides a surface modification method of nano-ZnO and its application in sunscreen cosmetics, that is, a modified nano-ZnO with a core-shell structure is prepared by a one-step method, aiming to solve Two problems: on the one hand, it solves the problem of photostability and chemical stability of nano-ZnO in the use of sunscreen cosmetics, and prolongs the service life of sunscreen cosmetics; on the other hand, it broadens the full-band ultraviolet shielding performance of nano-ZnO

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surface modification method of nano ZnO and application of nano ZnO in sunscreen cosmetics
  • Surface modification method of nano ZnO and application of nano ZnO in sunscreen cosmetics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. At room temperature, while stirring, disperse 1.0 kg of nano ZnO in 10.0 kg of deionized water, then add 0.54 kg of zinc nitrate and 0.1443 kg of sodium borate; continue to stir for 30 minutes, and finally add 0.15 kg of guar to the system The gel was swelled for 45 minutes, the stirring was stopped, and it was allowed to stand stably for 8 hours to obtain a nano ZnO / zinc borate / guar gum composite gel;

[0022] 2. Freeze-dry the nano-ZnO / zinc borate / guar gum composite gel prepared in step 1 at a temperature of -5°C for 7 hours to obtain a modified nano-particle with a core-shell structure. ZnO.

Embodiment 2

[0024] 1. At room temperature, while stirring, 4.0 kg of nano-ZnO was uniformly dispersed in 10.0 kg of deionized water, and then 0.52 kg of zinc chloride and 0.1924 kg of sodium borate were added; continue to stir for 60 minutes, and finally add 0.2 kg of melon to the system Guar gum swelled for 90 minutes, stopped stirring, and allowed to stand stably for 4 hours, and a kind of nanometer ZnO / zinc borate / guar gum composite gel was obtained;

[0025] 2. Freeze-dry the nano-ZnO / zinc borate / guar gum composite gel prepared in step 1 at a temperature of -35°C for 3 hours to obtain a modified nano-particle with a core-shell structure. ZnO.

Embodiment 3

[0027] 1. At room temperature, while stirring, disperse 2.5 kg of nano-ZnO evenly in 10.0 kg of deionized water, then add 0.88 kg of zinc acetate and 0.2405 kg of sodium borate; continue stirring for 45 minutes, and finally add 0.25 kg of guar to the system The gel was swelled for 70 minutes, the stirring was stopped, and it was allowed to stand stably for 6 hours to obtain a nano-ZnO / zinc borate / guar gum composite gel;

[0028] 2. Freeze-dry the nano-ZnO / zinc borate / guar gum composite gel prepared in step 1 at a temperature of -20°C for 5 hours to obtain a modified nano-particle with a core-shell structure. ZnO.

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

No PUM Login to View More

Abstract

The invention relates to the technical field of surface modification of nano materials, in particular to a surface modification method for synergistically enhancing ultraviolet shielding and light stability of nano ZnO and application of the surface modification method in sunscreen cosmetics. The surface modification comprises the following steps: (1) preparing nano ZnO / zinc borate / guar gum composite gel; and (2) preparing the modified nano ZnO with the core-shell structure. The preparation method has the beneficial effects that sodium borate is added in the functional modification process of nano ZnO, and the preparation method has the advantages that (1) on the surface of nano ZnO, sodium borate reacts with soluble zinc salt to generate zinc borate with a medium-wave ultraviolet (UVB) shielding function, so that a full-wave-band ultraviolet shielding (UVA and UVB) composite material is obtained; the application range is expanded; and (2) excessive sodium borate can be used as a cross-linking agent, so that guar gum is subjected to chemical cross-linking reaction, a microcapsule structure is formed to wrap the surface of the nano ZnO / zinc borate compound, and a core-shell structure is formed.

Description

technical field [0001] The invention relates to the technical field of surface modification of nanometer materials, in particular to a surface modification method for synergistically enhancing the ultraviolet shielding and light stability of nano ZnO and its application in sunscreen cosmetics. Background technique [0002] Nano-zinc oxide (ZnO) is a physical sunscreen agent that can effectively shield long-wave ultraviolet (UVA) in sunlight, and has been widely used in the field of sunscreen cosmetics. However, on the one hand, there is Zn in the use of nano-ZnO 2+ Dissolution problems lead to flocculation of cosmetic emulsions; on the other hand, nano-ZnO has strong photoactivity, and light generates active oxygen radicals, which can easily cause the degradation of organic matter in cosmetic formulations, leading to problems such as demulsification and deterioration of the formulation, affecting its application performance . For this reason, the method of inorganic or org...

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): C09C1/04C09C3/06C09C3/10A61K8/27A61Q17/04
Inventor 刘攀攀
Owner 广州柏为科技有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com