A kind of titanium dioxide/seaweed polysaccharide composite nanoparticle and its preparation method and application

A technology of composite nanoparticles and seaweed polysaccharide, applied in cosmetic preparations, cosmetics, pharmaceutical formulations, etc., can solve the problems of strong photochemical catalytic activity, poor weather resistance, easy aggregation, etc. Good results

Active Publication Date: 2019-10-25
广东名臣日化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies such as easy aggregation, poor weather resistance, and strong photochemical catalytic activity of nano-titanium dioxide in actual use, the purpose of the present invention is to provide a preparation method of titanium dioxide / seaweed polysaccharide composite nanoparticles

Method used

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  • A kind of titanium dioxide/seaweed polysaccharide composite nanoparticle and its preparation method and application
  • A kind of titanium dioxide/seaweed polysaccharide composite nanoparticle and its preparation method and application
  • A kind of titanium dioxide/seaweed polysaccharide composite nanoparticle and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of titanium dioxide / seaweed polysaccharide composite nanoparticles, comprising the following steps:

[0040] 1) Take 25 parts by weight of sodium alginate, add 3000 parts by weight of water, heat up to 80°C, and stir to completely dissolve the sodium alginate;

[0041] 2) Add 15 parts by weight of nano-titanium dioxide into 100 parts by weight of ethanol to prepare a suspension with a concentration of 15% by weight, then add the above-mentioned sodium alginate solution, mix well, and use 10% citric acid aqueous solution Adjust the pH of the mixture to 4.2, then irradiate with ultraviolet light, stir and react for 2 hours, and control the reaction temperature at 50°C;

[0042] 3) After the reaction is completed, the liquid is filtered off, and the solid is dried at 90° C. for 4 hours to obtain titanium dioxide / seaweed polysaccharide composite nanoparticles.

Embodiment 2

[0044] A preparation method of titanium dioxide / seaweed polysaccharide composite nanoparticles, comprising the following steps:

[0045] 1) Take 20 parts by weight of agar, add 2500 parts by weight of water, heat up to 80°C, and stir to completely dissolve the agar;

[0046] 2) Add 30 parts by weight of nano-titanium dioxide into 200 parts by weight of ethanol to prepare a suspension with a concentration of 15% by weight, then add the above-mentioned agar solution, mix well, and use 2% hydrochloric acid aqueous solution to dissolve the mixed solution The pH of the solution was adjusted to 5.1, and then irradiated with an ultraviolet lamp, stirred and reacted for 3 hours, and the reaction temperature was controlled at 60°C;

[0047] 3) After the reaction is completed, the liquid is filtered off, and the solid is dried at 90° C. for 4 hours to obtain titanium dioxide / seaweed polysaccharide composite nanoparticles.

Embodiment 3

[0049] A preparation method of titanium dioxide / seaweed polysaccharide composite nanoparticles, comprising the following steps:

[0050] 1) Take 15 parts by weight of sodium alginate, add 3500 parts by weight of water, heat up to 80°C, and stir to completely dissolve the sodium alginate;

[0051] 2) Add 40 parts by weight of nano-titanium dioxide into 250 parts by weight of ethanol to prepare a suspension with a concentration of 20% by weight, then add the above-mentioned sodium alginate solution, mix well, and use 20% aqueous acetic acid to dissolve The pH of the mixture was adjusted to 5.5, and then irradiated with an ultraviolet lamp, stirred and reacted for 2.5 hours, and the reaction temperature was controlled at 60°C;

[0052] 3) After the reaction is completed, the liquid is filtered off, and the solid is dried at 90° C. for 4 hours to obtain titanium dioxide / seaweed polysaccharide composite nanoparticles.

[0053] Effect application test example

[0054] Using the ...

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Abstract

The invention discloses titanium dioxide / algal polysaccharide composite nanometer particles and a preparation method and application thereof. The method comprises: dissolving algal polysaccharide in water, adding a nanometer titanium dioxide ethanol suspension, performing uniform mixing, adjusting the pH of the system to be in arrange of 2-7, performing a reaction through ultraviolet lamp irradiation, and after the reaction is over, performing thick liquid separation and drying to obtain titanium dioxide / algal polysaccharide composite nanometer particles. The nanometer particles are low in manufacture cost, the size distribution of nanometer particles is centralized, and the dispersion performance of particles is good. Compatibility between the nanometer particles and an oil phase is improved, so that the nanometer particles can be applied to cosmetics, especially sun-screening products, and can obviously improve the ultraviolet-resistance of the products. Algal polysaccharide in the nanometer particles and nanometer titanium dioxide with photochemical catalytic activity undergo a high-activity free radical reaction. The damage of free radicals to the skin is prevented, and the defect that nanometer titanium dioxide is taken as a sun-screening agent itself is overcome, and the product performance is improved.

Description

technical field [0001] The invention belongs to the technical field of composite nanoparticles, and in particular relates to a titanium dioxide / seaweed polysaccharide composite nanoparticle and its preparation method and application. Background technique [0002] In recent decades, with the destruction of the atmospheric ozone layer, the amount of ultraviolet rays in sunlight reaching the earth's surface has increased rapidly. As people's awareness of the dangers of excessive ultraviolet radiation is deepening, the use of sunscreen and skin care products is also increasing. Among all kinds of sunscreens, the inorganic sunscreen-nano-titanium dioxide has good ultraviolet light absorption and scattering effect. Compared with organic sunscreens, it has the advantages of high safety, good stability, high transparency, and low irritation, and has been widely used. . [0003] However, due to the small particle size (1-100nm) of nano-titanium dioxide, it is in a thermodynamically...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/73A61K8/29A61K8/02A61Q19/00A61Q17/04
Inventor 曾育聪李莉陈漫丽黄慕芸黄劲松
Owner 广东名臣日化有限公司
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