A nano-core-shell composite material for cosmetics and its preparation method

A composite material and nano-core-shell technology, which is applied in the field of nano-core-shell composite materials and preparation, can solve the problems of reduced use effect, uneven distribution, skin whitening, etc., and achieve uneven dispersion, effective composite materials, and solutions The effect of dry skin

Inactive Publication Date: 2011-12-14
陈家轲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, usually the inorganic oxide particles are relatively large, and they also refract and scatter visible light, resulting in unnatural whitening when applied to the skin. At the same time, it is easy to cause uneven distribution after application, and the feeling is too rough, resulting in a decline in the use effect.

Method used

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  • A nano-core-shell composite material for cosmetics and its preparation method
  • A nano-core-shell composite material for cosmetics and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 1g of nano-zinc oxide powder with a particle size of 50nm into a 100ml beaker, then add 0.4mol / L titanium tetrachloride solution into 50ml, heat up to 75°C, control the speed at 500rpm, and stir for 30min. Stirring was stopped, and the obtained mixed solution was filtered, washed with deionized water, dried in a vacuum oven, and placed in a muffle furnace for sintering at 500°C for 30 minutes. The thickness of the obtained nano zinc oxide core is about 50nm, and the thickness of the titanium dioxide shell is about 10nm.

Embodiment 2

[0017] Add 1g of nano-zinc oxide powder with a particle size of 50nm into a 100ml beaker, then add 0.8mol / L titanium tetrachloride solution into 50ml, heat up to 75°C, control the speed at 500rpm, and stir for 30min. Stirring was stopped, and the obtained mixed solution was filtered, washed with deionized water, dried in a vacuum oven, and placed in a muffle furnace for sintering at 500°C for 30 minutes. The thickness of the obtained nanometer zinc oxide core is about 50nm, and the thickness of the titanium dioxide shell is about 15nm.

Embodiment 3

[0019] Add 1g of nano-zinc oxide powder with a particle size of 50nm into a 100ml beaker, then add 0.4mol / L titanium tetrachloride solution into 50ml, heat up to 85°C, control the speed at 500rpm, and stir for 60min. Stirring was stopped, and the obtained mixed solution was filtered, washed with deionized water, dried in a vacuum oven, and placed in a muffle furnace for sintering at 500°C for 30 minutes. The thickness of the obtained nano zinc oxide core is about 50nm, and the thickness of the titanium dioxide shell is about 20nm.

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Abstract

The invention discloses a nano-sized core-shell composite material used for sunscreen cosmetics and a preparation method thereof, belonging to the field of skin-care cosmetic chemicals. The composite material is composed of titanium oxide and zinc oxide, wherein zinc oxide serves as a core and titanium oxide serves as a shell. Based on the integration of characteristics of the two compounds, the composite material has both sun-screening and moisturizing functions. Cosmetics made from the nano-sized core-shell composite material are better in sun-screening and moisturizing functions and dispersibility. In the invention, by designing a titanium oxide/zinc oxide nano-sized core-shell composite material, on the one hand, the ultraviolet absorption capacity is improved, and a more efficient anti-ultraviolet sunscreen composite material is provided; and on the other hand, by preparing ultra-fine nano-sized core-shell materials, the problem that an inorganic sun-screening agent does not disperse uniformly as well as the problem that zinc oxide can dry out the skin during use are solved.

Description

technical field [0001] The invention relates to a nano core-shell structure composite material used in cosmetics and a preparation method thereof, belonging to the technical field of beauty and skin care cosmetic chemicals. Background technique [0002] Ultraviolet rays are the general term for radiation with wavelengths from 10nm to 400nm in the electromagnetic spectrum. When ultraviolet rays strongly act on the skin, photodermatitis can occur, and erythema, itching, blisters, edema, etc. appear on the skin; severe cases can also cause skin cancer. According to the wavelength division, the ultraviolet rays in the sun can be divided into the following three types: long-wave ultraviolet rays with a wavelength of 320-400nm, called A-type ultraviolet rays (UVA), which can cause direct pigmentation and cause skin tanning, premature aging of the skin, Wrinkles, causing skin sagging, wrinkles, freckles and age spots, and even skin cancer when over-irradiated; medium-wave ultraviol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/29A61K8/27A61Q17/04
Inventor 陈家轲
Owner 陈家轲
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