Preparation method of carbon nitride/nanometer zinc oxide ultraviolet shielding agent close to skin color

A nano-zinc oxide, ultraviolet shielding agent technology, applied in skin care preparations, chemical instruments and methods, zinc oxide/zinc hydroxide and other directions, can solve the problems of paleness and unnaturalness, easy precipitation of pigments, affecting performance, etc. To achieve the effect of simple preparation process, simple post-processing and large output

Inactive Publication Date: 2019-09-17
SHANGQIU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure nano-ZnO often has an unsatisfactory full-ultraviolet shielding effect and is white. It will make people's skin look pale and unnatural when used in cosmetics. The initial solution is to mix it with other organic pigments or inorganic pigments. Not only is the operation troublesome, but also the pigment is easy to precipitate, which affects its performance

Method used

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  • Preparation method of carbon nitride/nanometer zinc oxide ultraviolet shielding agent close to skin color
  • Preparation method of carbon nitride/nanometer zinc oxide ultraviolet shielding agent close to skin color

Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of the near skin color carbon nitride / nano-zinc oxide ultraviolet shielding agent of the present embodiment, the steps are as follows:

[0023] (1) Dissolve melamine and thiourea in deionized water at a ratio of 1:0.1 (molar ratio), stir evenly, transfer the above solution to a reaction kettle at 180°C for 12 hours, cool to room temperature and filter, and filter the obtained The cake was calcined at 520°C for 3 hours to obtain carbon nitride;

[0024] (2) Fully grind the carbon nitride and zinc chloride obtained above (the mass ratio of carbon nitride to zinc chloride is 5%) in an agate mortar, put the ground powder in a crucible, and heat at 350°C Calcining at low temperature for 2 hours, you can get nano carbon nitride / zinc oxide UV shielding agent with close skin color.

Embodiment 2

[0026] The preparation method of the near skin color carbon nitride / nano-zinc oxide ultraviolet shielding agent of the present embodiment, the steps are as follows:

[0027] (1) Dissolve melamine and thiourea in deionized water at a ratio of 1:3 (molar ratio), stir evenly, transfer the above solution to a reaction kettle at 180°C for 12 hours, cool to room temperature and filter, and filter the obtained The cake was calcined at 520°C for 3 hours to obtain carbon nitride;

[0028] (2) Fully grind the carbon nitride and zinc chloride obtained above (the mass ratio of carbon nitride to zinc chloride is 25%) in an agate mortar, put the ground powder in a crucible, and heat at 400°C Calcining at low temperature for 2 hours, the carbon nitride / nanometer zinc oxide ultraviolet shielding agent with close skin color can be obtained.

Embodiment 3

[0030] The preparation method of the near skin color carbon nitride / nano-zinc oxide ultraviolet shielding agent of the present embodiment, the steps are as follows:

[0031] (1) Dissolve melamine and thiourea in deionized water at a ratio of 1:6 (molar ratio), stir evenly, transfer the above solution to a reaction kettle at 180°C for 12 hours, cool to room temperature and filter, and filter the obtained The cake was calcined at 520°C for 3 hours to obtain carbon nitride;

[0032] (2) Fully grind the carbon nitride and zinc chloride obtained above (the mass ratio of carbon nitride to zinc chloride is 50%) in an agate mortar, put the ground powder in a crucible, and heat at 500°C Calcining at low temperature for 2 hours, the carbon nitride / nanometer zinc oxide ultraviolet shielding agent with close skin color can be obtained.

[0033] As a comparison (relative to Example 1), without adding carbon nitride, fully grind zinc chloride in an agate mortar, place the ground powder in ...

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Abstract

The invention discloses a preparation method of a carbon nitride / nanometer zinc oxide ultraviolet shielding agent close to the skin color. The preparation method is characterized by comprising the following steps: (1) dissolving melamine and thiourea into deionized water according to a certain proportion, carrying out uniform stirring, transferring the solution into a reaction kettle to carry out a reaction at 180 DEG C for 12 h, carrying out cooling to the room temperature, then, carrying out filtration, and calcining the obtained filter cake at 520 DEG C for 3 h to obtain carbon nitride; and (2) sufficiently and uniformly grinding carbon nitride and a certain quantity of zinc chloride in an agate mortar, placing the ground powder into a crucible, and carrying out calcination at a certain temperature for 2 h to obtain the carbon nitride / nanometer zinc oxide ultraviolet shielding agent close to the skin color. The carbon nitride / nanometer zinc oxide ultraviolet shielding agent prepared by adopting the method has the advantages that the preparation process is simple, rapid and easy to operate and a product is high in yield, simple in aftertreatment, controllable in shape, size and composition, nontoxic, antibacterial and closer to the skin color, and particularly, the carbon nitride / nanometer zinc oxide ultraviolet shielding agent has a relatively good application prospect in the field of cosmetics.

Description

technical field [0001] The invention belongs to the technical field of preparation of ultraviolet shielding agents, and in particular relates to a preparation method of a carbon nitride / nanometer zinc oxide ultraviolet shielding agent. Background technique [0002] Ultraviolet (UV) radiation ranges from 100 to 400nm in the solar radiation spectrum, and its energy only accounts for 8% of the total solar radiation. According to the biological effects of different wavelengths of ultraviolet rays, it can be divided into three parts: ultraviolet A segment (UVA), with a wavelength of 320~400nm, accounting for about 6% of the total solar radiation. This part of the biological effect is weak, mainly pigmentation. . Ultraviolet B segment (UVB), with a wavelength of 290~320nm, accounts for about 1.5% of the total solar radiation. This segment has a greater impact on the human body. Its main function is anti-rickets and erythema, which is the cause of skin cancer, cataracts, and immun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02C01B21/082B82Y30/00A61K8/27A61K8/19A61Q17/04
CPCA61K8/19A61K8/27A61Q17/04B82Y30/00C01B21/0605C01G9/02C01P2004/80C01P2006/90
Inventor 孙家书田梦格彭世界郭婷婷张向飞邵梅玲翟滨
Owner SHANGQIU NORMAL UNIVERSITY
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