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Preparation method of nanometer zinc oxide/cation polysaccharide hybridized nano-particles

A technology of nano-zinc oxide and cationic polysaccharides, which is applied in the direction of cosmetic preparations, skin care preparations, cosmetics, etc., can solve the problems of easy penetration into the skin, low skin permeability, poor dispersion, etc., and achieve simple and convenient preparation process, shielding Effect of UV radiation, good biocompatibility

Active Publication Date: 2019-01-29
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the problems of poor dispersion, high photocatalytic activity, and easy penetration into the skin of nano-zinc oxide in the above-mentioned prior art, the present invention explores the modification method of nano-zinc oxide, through cationic polysaccharide / L-cysteine / A nano-zinc oxide / cationic polysaccharide hybrid nanoparticle is prepared from a mixed solution of nano-zinc oxide precursor. The resulting nano-zinc oxide / cationic polysaccharide hybrid nanoparticle has good dispersibility, low photocatalytic activity and low skin permeability. A hybrid nano-sunscreen particle with sunscreen and antioxidant functions

Method used

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  • Preparation method of nanometer zinc oxide/cation polysaccharide hybridized nano-particles

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Embodiment 1

[0054] Preparation of nano-zinc oxide / quaternized chitosan hybrid nanoparticles: the preparation concentration is 3mg mL -1 0.5wt% quaternized chitosan (QAC) aqueous solution 20mL, 3mg mL -1 L-cysteine ​​aqueous solution 20mL, mix the two in equal volume, and then add the nano-zinc oxide precursor to make the concentration 2mg mL -1 , stirred at room temperature for 24 hours to make it evenly mixed, and finally adjusted the pH of the solution to 7 with 0.5M NaOH. (QAC / L-Cys / ZnO-2).

Embodiment 2

[0056] Preparation of nano-zinc oxide / quaternized chitosan hybrid nanoparticles: the preparation concentration is 3mg mL -1 0.5wt% QAC aqueous solution 20mL, 3mg mL -1 L-cysteine ​​aqueous solution 20mL, mix the two in equal volume, then add the nano-zinc oxide precursor to make the concentration 4mg mL -1 , stirred at room temperature for 24 hours to make it evenly mixed, and finally adjusted the pH of the solution to 7 with 0.5M NaOH. (QAC / L-Cys / ZnO-4).

Embodiment 3

[0058] Preparation of nano-zinc oxide / quaternized chitosan hybrid nanoparticles: the preparation concentration is 3mg mL -1 0.5wt% QAC aqueous solution 20mL, 3mg mL -1 L-cysteine ​​aqueous solution 20mL, mix the two in equal volume, and then add the nano-zinc oxide precursor to make the concentration 6mg mL -1 , stirred at room temperature for 24 hours to make it evenly mixed, and finally adjusted the pH of the solution to 7 with 0.5M NaOH. (QAC / L-Cys / ZnO-6).

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Abstract

The invention discloses nanometer zinc oxide / cation polysaccharide hybridized nano-particles and a preparation method of the nanometer zinc oxide / cation polysaccharide hybridized nano-particles, and belongs to the technical field of composite nano-particles. The nanometer zinc oxide / cation polysaccharide hybridized nano-particles are prepared through a cation polysaccharide / sulfydryl-containing amino acid / nanometer zinc oxide precursor mixed solution, the preparation method is simple, and the cost is relatively low. Compared with the existing particle materials, the hybridized nano-particles provided by the invention have the advantages of good dispersibility and good light stability, and relatively low photocatalytic activity, and in addition, the hybridized nano-particles also have goodoxidation resistance and emulsifying properties, and can be applied to sun-screening skin care products and other anti-ultraviolet materials.

Description

technical field [0001] The invention relates to a nanometer zinc oxide / cationic polysaccharide hybrid nanoparticle and a preparation method thereof, belonging to the field of composite nanoparticle. Background technique [0002] Inorganic sunscreen is a physical sunscreen that acts as a sunscreen by reflecting, refracting, and scattering ultraviolet rays. When its particle size is 1-100nm, it is called an inorganic nano-sunscreen. Compared with ordinary inorganic sunscreens, inorganic nano-sunscreens have smaller particle size and larger specific surface area, which can not only absorb ultraviolet rays, but also reflect ultraviolet rays, and have a stronger ability to block ultraviolet rays. However, due to its small particle size and large specific surface area, it is easy to agglomerate, has high photocatalytic activity, and easily penetrates the skin, causing potential harm to people's health. In order to solve the problems of its easy aggregation, high photocatalytic ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/73A61K8/44A61K8/27A61K8/02A61Q17/04
CPCA61K8/025A61K8/27A61K8/447A61K8/731A61K8/735A61K8/736A61K8/737A61Q17/04
Inventor 朱叶魏玮李小杰冉海燕刘晓亚
Owner JIANGNAN UNIV
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