A kind of microbead and its preparation method and application

A technology of microbeads and spheres, which is applied in the field of microbeads and its preparation, can solve the problems of discomfort, skin irritation, and restrictions on the wide application of polylactic acid microbeads, and achieve the effects of skin comfort, less irritation and good application prospects

Active Publication Date: 2019-03-08
CHANGCHUN SINOBIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microbeads provided by the prior art control the degree of scrubbing during the cleaning process by selecting polylactic acid microbeads of different particle sizes, which has better efficacy, but because the microbeads are prepared by grinding and pulverizing, they are not Regular-shaped polylactic acid microbeads, the sharp edges of the microbeads will cause skin irritation or discomfort, thus limiting the wide application of this polylactic acid microbeads

Method used

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  • A kind of microbead and its preparation method and application
  • A kind of microbead and its preparation method and application
  • A kind of microbead and its preparation method and application

Examples

Experimental program
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preparation example Construction

[0047] The present invention provides a method for preparing microbeads described in the above technical solution, comprising:

[0048] The raw material including biodegradable polymer is prepared into spherical microbeads by adopting emulsion solvent evaporation method, membrane emulsification method, spray drying method or polymerization method.

[0049] In the present invention, the type and source of the biodegradable polymer are consistent with the type and source of the biodegradable polymer described in the above technical solution, and will not be repeated here.

[0050] In the present invention, the method for preparing the biodegradable polymer into spherical microbeads may be an emulsion solvent evaporation method, a membrane emulsification method, a spray drying method or a polymerization method. In an embodiment of the present invention, the process of the emulsion solvent volatilization method is to volatilize the solvent in the emulsion of the biodegradable poly...

Embodiment 1

[0071] 1.25 mL of 5% NH 4 HCO 3 The solution was added to 4 mL of chloroform solution of polylactic acid with a mass concentration of 6.25% for emulsification to obtain a primary emulsion;

[0072] The primary emulsion was poured into 150 mL of an aqueous solution of polyvinyl alcohol with a mass concentration of 0.1%, and stirred at room temperature at a speed of 400 rpm for 4 hours to obtain polylactic acid spherical microbeads with a porous structure.

[0073] The polylactic acid spherical microbeads prepared in Example 1 of the present invention and their cross-sections were tested by scanning electron microscopy, and the test results were as follows: figure 1 and figure 2 as shown, figure 1 Scanning electron microscope picture of polylactic acid spherical microbeads prepared in Example 1 of the present invention, figure 2 The scanning electron microscope picture of the polylactic acid spherical microbead section that is prepared in Example 1 of the present invention...

Embodiment 2

[0077] 1.25 mL of 10% NH 4 HCO 3 The solution is added into 4 mL of chloroform solution of polylactic acid and cellulose copolymer with a mass concentration of 6.25% for emulsification to obtain a primary emulsion; the preparation method of the copolymer of polylactic acid and cellulose is: using stannous octoate as a catalyst , by grafting polylactic acid on cellulose by ring-opening polymerization of lactide to prepare a copolymer of polylactic acid and cellulose.

[0078] The primary emulsion was poured into 150 mL of polyvinyl alcohol aqueous solution with a mass concentration of 0.1%, and stirred at room temperature at a speed of 400 rpm for 4 hours to obtain copolymer spherical microbeads of polylactic acid and cellulose with a hollow structure.

[0079] The copolymer spherical microbead of polylactic acid and cellulose prepared in Example 2 of the present invention and its section were subjected to scanning electron microscopy tests, and the test results were as follow...

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Abstract

The invention provides microbeads. The microbeads are prepared from raw materials comprising biodegradable polymers and are spherical microbeads. The invention provides a preparing method of the microbeads in the technical scheme. The preparing method includes the step that the raw materials comprising the biodegradable polymers are prepared into the spherical microbeads with an emulsion-solvent evaporation method or a membrane emulsification method or a spray drying method or a polymerization method. Compared with the prior art, the microbeads are the degradable spherical microbeads, and are large in specific surface area, soft in texture, small in skin irritation and high in skin comfort. By means of the preparing method of the microbeads, the size, the size distribution, the microstructure and the feature of the microbeads can be controlled, functional substances can be led into the interiors or the surfaces of the microbeads in the microbead preparing process, and the prepared microbeads meet different application requirements accordingly. The invention further provides an application of the microbeads to preparing of cleaning care products and cosmetics.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a microbead and its preparation method and application. Background technique [0002] Plastic microbeads are commonly used additives in cleaning care products and cosmetic formulations, but plastic microbeads will pollute the environment along with sewage discharge in the environment. Environmental protection organizations have conducted research on the impact of polymer microbeads on the lake environment. As a result, microbeads are easily eaten by aquatic organisms. Under the enrichment effect of the food chain, the ecological balance of the entire natural water body will be destroyed. In order to avoid the pollution of plastic microbeads to the environment, some companies have developed substitutes for plastic microbeads using natural products as raw materials. For example, Rahn Company launched the FOSSIL PEELING POEDER product, which uses fossilized diatom cells to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08J9/00C08L67/04C08L89/00C08L69/00C08L5/08C08L5/02C08L5/04C08L3/02C08L1/28C08G18/48C08G18/42C08G79/02A61K8/85A61Q19/10
CPCA61K8/85A61K2800/412A61Q19/10C08G18/4018C08G18/42C08G18/48C08G79/025C08J3/12C08J3/122C08J9/00C08J2301/28C08J2303/02C08J2305/02C08J2305/04C08J2305/08C08J2367/04C08J2369/00C08J2389/00
Inventor 石旭东崔立国孙海庄秀丽陈学思
Owner CHANGCHUN SINOBIOMATERIALS
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