Modified titanium dioxide particles, preparation method thereof and skin care product

A technology of titanium dioxide and skin care products, applied in the field of skin care products, can solve the problems of oxidative damage, little effect, and difficult to disperse, and achieve the effects of resisting damage, good absorption, and strong ultraviolet absorption.

Active Publication Date: 2021-09-28
HUNAN YUJIA COSMETICS MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these inorganic metal nanoparticles have strong photocatalytic properties, leading to oxidative damage, and also have the problem of not being easy to disperse, and traditional physical sunscreens are ineffective in defending against high-energy visible light in the blue light band, heavy metals, and anti-oxidation. little effect
Existing technology still needs to be improved

Method used

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  • Modified titanium dioxide particles, preparation method thereof and skin care product
  • Modified titanium dioxide particles, preparation method thereof and skin care product
  • Modified titanium dioxide particles, preparation method thereof and skin care product

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preparation example Construction

[0052] One embodiment of the present invention provides a method for preparing modified titanium dioxide particles, which includes the following steps S10-20.

[0053] Prepare titanium dioxide particle dispersion and dopamine hydrochloride solution respectively;

[0054] Mixing the titanium dioxide particle dispersion and dopamine hydrochloride solution, carrying out polymerization reaction under light-proof and alkaline conditions, to obtain modified titanium dioxide particles;

[0055] The conditions of the polymerization reaction are: react at 0°C to 25°C for 12h to 72h;

[0056] The mass ratio of the titanium dioxide particles in the titanium dioxide particle dispersion to the polydopamine hydrochloride in the dopamine hydrochloride solution is 1:(1-5).

[0057] Mix the titanium dioxide particle dispersion and dopamine hydrochloride solution, and initiate the polymerization reaction under alkaline and light-proof conditions. The dopamine self-polymerizes on the surface of...

Embodiment 1

[0086] 1) Weigh 20 mg of titanium dioxide particles into a beaker, add 40 mL of water and 20 mL of ethanol, ultrasonically disperse for 10 min, and obtain a titanium dioxide particle dispersion solution under magnetic stirring at room temperature. Weigh 20 mg of dopamine hydrochloride, add 5 mL of water to dissolve, and obtain a dopamine hydrochloride solution. Add the dopamine solution to the dispersion of titanium dioxide particles and mix, and add 1mL of concentrated ammonia water to initiate polymerization. After the polymerization reaction at 25°C and dark conditions for 12 hours, centrifuge, filter, wash, and dry to obtain modified titanium dioxide particles, which are recorded as modified titanium dioxide particles. Titanium dioxide particles a.

[0087] 2) Step 1) was repeated, and the polymerization reaction was carried out for 24 hours and 72 hours respectively to obtain modified titanium dioxide particles b and modified titanium dioxide particles c.

[0088] 3) Par...

Embodiment 2

[0093]1) Weigh 20 mg of titanium dioxide particles into a beaker, add 40 mL of water and 20 mL of ethanol, ultrasonically disperse for 10 min, and obtain a titanium dioxide particle dispersion solution under magnetic stirring at room temperature. Weigh 20 mg of dopamine hydrochloride, add 5 mL of water to dissolve, and obtain a dopamine hydrochloride solution. Add the dopamine solution to the dispersion of titanium dioxide particles and mix, and add 1mL of concentrated ammonia water to initiate polymerization. After the polymerization reaction at 25°C and dark conditions for 12 hours, centrifuge, filter, wash, and dry to obtain modified titanium dioxide particles, which are recorded as modified titanium dioxide particles. Sexual titanium dioxide particles d.

[0094] 2) Repeat step 1) to react 100 mg and 200 mg of titanium dioxide particles respectively to obtain modified titanium dioxide particles e and modified titanium dioxide particles f.

[0095] 3) Particle size measure...

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Abstract

The invention relates to modified titanium dioxide particles, a preparation method thereof and a skin care product. The modified titanium dioxide particles comprise a core layer and a shell layer wrapping the core layer, wherein the core layer is made of titanium dioxide as a core, and the shell layer is a polydopamine layer; the particle size of the modified titanium dioxide particles is 200-700nm. In the modified titanium dioxide particles, the polydopamine layer wraps the titanium dioxide, and free radicals generated by the influence of external environments such as illumination can be eliminated, so that the modified titanium dioxide particles have antioxidant performance; meanwhile, the modified titanium dioxide particles have good biocompatibility and water dispersibility and efficient light absorption capacity, have very strong ultraviolet absorption capacity, and also have a better absorption effect on high-energy visible light at 400-500nm; and the modified titanium dioxide particles can also chelate heavy metal ions, so that the damage of the heavy metal ions to the skin can be resisted.

Description

technical field [0001] The invention relates to the technical field of skin care products, in particular to a modified titanium dioxide particle, a preparation method thereof, and a skin care product. Background technique [0002] As the most important barrier of the human body, the skin plays multiple protective roles. Long-term exposure of human skin to sunlight can lead to photoaging, sunburn and other damage. Among them, the causes of damage include the ultraviolet and blue light bands in sunlight, heavy metal elements carried in the living environment, etc., all of which can trigger the accumulation of free radicals inside the skin, leading to skin aging or DNA damage; , its skin penetration ability is stronger, it can reach the dermis layer, and trigger oxidative stress reaction, thus causing skin aging, allergies and other problems. [0003] In traditional technology, chemical and physical methods are mainly used to isolate sunlight. Chemical methods mainly prevent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/29C01G23/047A61Q17/00A61Q17/04A61Q19/00A61Q19/08
CPCA61K8/29A61Q17/04A61Q19/08A61Q19/00A61Q17/00C01G23/08A61K2800/413C01P2004/62C01P2004/01C01P2002/80
Inventor 戴跃锋何广文颜少慰马晓瑜聂思怡
Owner HUNAN YUJIA COSMETICS MFG CO LTD
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