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The preparation method of antibacterial type sma emulsion

A technology of emulsion and solution, which is applied in the field of polymer materials and nanomaterials, can solve the problems of producing bacteria, achieve the effect of improving antibacterial property and prolonging the service life

Active Publication Date: 2021-06-15
海南三帝制药有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a kind of preparation method of bacteriostatic SMA emulsion in order to overcome the defect that emulsions such as cosmetics in the prior art produce bacterial species after a long time, and the bacteriostatic SMA emulsion that this method makes is expected to be used as cosmetics Additive use of emulsion

Method used

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  • The preparation method of antibacterial type sma emulsion
  • The preparation method of antibacterial type sma emulsion
  • The preparation method of antibacterial type sma emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Weigh 0.5g of macromolecule SMA (Mn=100000), dissolve it in 10ml of organic solvent DMF, stir vigorously, and slowly add ultrapure water dropwise at the same time, when blue opalescence appears, slowly add this solution dropwise In 100ml ultrapure water, and vigorously stirred to obtain SMA nano colloidal particles. (2) Take 10ml of the above-mentioned SMA nano colloidal particle solution, add dropwise 0.2mol / L AgNO3 solution 15μL, wrap it in tin foil to avoid light, and stir for 3 hours under the action of magnetic stirring to fully mix the colloidal particle and silver nitrate, then place Expose under ultraviolet light for 5 minutes to prepare a silver-loaded nano colloidal particle (nano SMA-Ag) solution. (3) Take 3 mL of the silver-loaded nano-colloid particle solution obtained in step (2), add 3 mL of white oil, emulsify with a high-speed disperser at a speed of 5000 r / min, and homogenize for 2 minutes to obtain an antibacterial emulsion.

Embodiment 2

[0016] After diluting the silver-loaded nanocolloid particle (nano SMA-Ag) solution prepared in step 2 in Example 1, remove dust with a 0.45 μm filter, drop one drop onto the copper grid, dry at room temperature for 1 day, and observe the morphology with TEM , the result is as figure 1 shown. The results show that the particle size of nano-Ag is about 8-16nm (due to the contrast problem between Ag and SMA colloidal particles, the SMA colloidal particles in TEM are not clear), and it can be seen from the TEM image that nano-Ag can be well dispersed in SMA colloidal particles On or around the surface, this is because the SMA polymer contains a large number of carbonyl groups that can complex with nano-Ag.

Embodiment 3

[0018] The silver-loaded nano colloid particle solution in embodiment 1 adds white oil emulsification and the photo is as follows figure 2 shown. It can be seen that it has good emulsifying performance and the emulsion properties are relatively stable.

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Abstract

The invention discloses a preparation method of an antibacterial SMA emulsion. SMA is used as a polymer matrix, AgNO3 is added, nano-silver is reduced by means of ultraviolet light, and the complexation between the carbonyl on the anhydride ring of SMA and silver is carried out, so that the The nano-silver with antibacterial properties is stably loaded on the SMA colloidal particles, and the oil phase liquid is further added to emulsify to obtain an antibacterial emulsion. This emulsion is expected to be used in cosmetics to prolong its service life.

Description

technical field [0001] The invention belongs to the field of polymer materials and nanometer materials, and in particular relates to a preparation method of antibacterial SMA emulsion. Background technique [0002] The current cosmetics generally have a short shelf life. This is because after a long time, some bacteria will be produced in the cosmetic emulsion, which will cause the cosmetic emulsion to deteriorate. When used on the face, the bacteria will irritate the skin and cause skin allergies. [0003] SMA (Styrene-Maleic Anhydride Copolymer) is a polymer material, its structure contains hydrophilic maleic anhydride units and hydrophobic styrene units, it can be used as a polymer surfactant, good dispersion Agents, compatibilizers, etc., which can form nano-colloid particles in a certain solvent to stabilize the emulsion. [0004] The typical characteristic of nano-silver is antibacterial. The bactericidal mechanism of silver is different from that of chemically synthe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/81A61K8/19A61K8/06A61Q19/00
CPCA61K8/06A61K8/19A61K8/8117A61K2800/10A61K2800/524A61K2800/58A61K2800/81A61Q19/00
Inventor 葛瑞娟
Owner 海南三帝制药有限公司
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