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High-oil-absorption whitening hexagonal boron nitride porous microsphere for cosmetics

A technology of hexagonal boron nitride and porous microspheres, which is applied in the direction of cosmetics, cosmetic preparations, nitrogen compounds, etc., can solve the problems of low oil absorption and application limitations, and achieve large oil absorption, convenient post-treatment and purification, and excellent preparation process and device simple effect

Active Publication Date: 2022-03-04
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a hexagonal boron nitride porous microsphere and a preparation method thereof, the purpose of which is to solve the problem of low oil absorption caused by the non-porous structure of the existing hexagonal boron nitride, and its application in the field of cosmetics is limited The problem

Method used

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  • High-oil-absorption whitening hexagonal boron nitride porous microsphere for cosmetics
  • High-oil-absorption whitening hexagonal boron nitride porous microsphere for cosmetics
  • High-oil-absorption whitening hexagonal boron nitride porous microsphere for cosmetics

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of hexagonal boron nitride porous microspheres, comprising the steps of:

[0028] Add 0.02 mol of boric acid, 0.015 mol of 2-methylimidazole and 0.07 mol of sodium chloride into a beaker containing 130 mL of deionized water, heat and stir, the heater temperature is set to 90°C, and the stirring rate is 450 r / min, After obtaining a completely clear and transparent solution, stop heating and stirring, and then spray dry the obtained clear and transparent solution through a spray dryer, set the air inlet temperature to 180°C, and the feed flow rate to 800mL / min to prepare a white precursor powder;

[0029] Weigh 4g of the obtained white precursor powder, lay it flat on a rectangular corundum porcelain boat, and pass ammonia gas into a tube furnace for high-temperature reaction. The heating rate is 10°C / min, the reaction temperature is 1000°C, and the reaction time is 3h. Cool naturally after reaction, obtain the hexagonal boron nitride microsphere pow...

Embodiment 2、3、4

[0035] Change the amount of 2-methylimidazole in Example 1 to 0.02mol, 0.005mol, and 0.0025mol, and the other operations are the same as in Example 1.

Embodiment 5

[0037] Change the high-temperature reaction temperature into 1200° C. in Example 1, and other operations are the same as in Example 1.

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Abstract

The invention belongs to the technical field of functional material preparation, and particularly relates to a hexagonal boron nitride porous microsphere and a preparation method thereof. The preparation method comprises the following steps: adding water into boric acid, 2-methylimidazole and a template agent, fully dissolving, and drying to obtain uniform precursor powder; carrying out high-temperature reaction on the precursor powder in an ammonia gas atmosphere to obtain hexagonal boron nitride powder filled with a template agent; and immersing the hexagonal boron nitride powder into water to dissolve the template agent, washing, filtering and drying to obtain the hexagonal boron nitride porous microspheres. The method is simple in process and equipment, the average particle size value of the prepared hexagonal boron nitride porous microsphere powder ranges from 1 micrometer to 6 micrometers, and the hexagonal boron nitride porous microsphere powder is high in purity, whiteness, porosity and oil absorption amount and suitable for being used as an oil-controlling and whitening additive of cosmetics.

Description

technical field [0001] The invention relates to the field of functional materials, in particular to a hexagonal boron nitride porous microsphere and a preparation method thereof. Background technique [0002] Powder raw materials are widely used in cosmetics, such as skin care, base makeup, sunscreen, etc., to cover blemishes, brighten, absorb, and improve skin feel. There are many classification methods for powder raw materials, which can be roughly divided into colored powder, white powder, body powder and pearlescent powder. Colored powder is used to adjust the color tone, and white powder has the functions of covering, whitening and blocking ultraviolet rays. , There are many types of body powders, the main function is to adjust the spreadability, skin-adherence, gloss, texture, formability and usability of the product. Pearlescent powder can improve the gloss and texture of the product. Instant whitening is carried out through the traditional powder film covering techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/064A61K8/19A61K8/02A61Q19/00
CPCC01B21/064A61K8/19A61K8/0279A61Q19/00A61K2800/10C01P2004/61C01P2004/32C01P2006/16C01P2006/19C01P2006/60C01P2006/80
Inventor 翁群红成圆猛王淑英
Owner HUNAN UNIV
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