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A kind of compound antibacterial coating material, preparation method and application thereof

A composite antibacterial and coating technology, applied in the field of surface antibacterial, can solve the problems of limited application prospects and insufficient antibacterial performance of polymers, and achieve the effects of simple preparation method, significant synergistic antibacterial effect, and excellent antibacterial performance.

Active Publication Date: 2018-09-07
CHENGDU BOYAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the antibacterial performance of the polymer obtained by this method is not high enough, and the practical application prospect is limited

Method used

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  • A kind of compound antibacterial coating material, preparation method and application thereof
  • A kind of compound antibacterial coating material, preparation method and application thereof
  • A kind of compound antibacterial coating material, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] In the single-necked flask, 10g of chitosan with molecular weight of 10000 was dissolved in the aqueous solution of 30ml pH5.0, after fully dissolving, adding (III) molecular weight was 2000 Polyethylene Glycol 3g, and reacted under room temperature for 48 hours. After the reaction, the reaction solution was concentrated and freeze-dried, then fully washed with ethanol, and dried to obtain polyethylene glycol-grafted chitosan with a grafting rate of 2.4%, which was defined as PEG-g-CS 2.4％ .

Embodiment 2

[0043] In the single-necked flask, 10g of chitosan with a molecular weight of 10000 was dissolved in the aqueous solution of 30ml pH5.0. After fully dissolving, add 3g of polyethylene glycol with a molecular weight of 1000 in the formula (III), and reacted for 48 hours at room temperature. After the reaction, the reaction solution was concentrated and freeze-dried, then fully washed with ethanol, and dried to obtain a polyethylene glycol-grafted chitosan with a grafting rate of 4.5%, which was defined as PEG-g-CS 4.5％ .

Embodiment 3

[0045] In the single-necked flask, 10g of chitosan with a molecular weight of 10000 was dissolved in the aqueous solution of 30ml pH5.0, after fully dissolving, adding 3g of polyethylene glycol with a molecular weight of 12000 in the formula (III), reacted for 48 hours at room temperature. After the reaction finished, the reaction solution was concentrated and freeze-dried, then fully washed with ethanol, and dried to obtain the chitosan grafted with polyethylene glycol with a grafting rate of 0.4%, which was defined as PEG-g-CS 0.4％ .

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Abstract

The invention provides a preparation method of a composite antibacterial coating substance. The method includes: placing chitosan grafted by modified polyethylene glycol and nano silver particles modified by gallic acid into an aqueous solution, and evenly mixing to obtain the composite antibacterial coating substance, wherein after the mixing, the concentration of the chitosan grafted by the modified polyethylene glycol is not lower than 1.2mg / ml, and the concentration of the nano silver particles modified by the gallic acid is not lower than 0.12mg / ml; the grafting rate of the chitosan grafted by the modified polyethylene glycol is not higher than 20%; the molecular weight of the modified polyethylene glycol in the chitosan grafted by the modified polyethylene glycol is 1000-20000, and the molecular weight of the chitosan is 5000-500000. The invention further provides the composite antibacterial coating substance prepared by the method and application of the composite antibacterial coating substance. The composite antibacterial coating substance prepared by the method is excellent in antibacterial performance. The preparation method is simple and low in cost. The composite antibacterial coating substance is suitable for various surface antibacterial application.

Description

technical field [0001] The invention belongs to the field of surface antibacterial, and in particular relates to a composite antibacterial coating material, a preparation method and an application thereof. Background technique [0002] Fungal microorganisms form biofilms by adhering, multiplying and proliferating on the surface of objects. The formation of biofilm will pose a threat to human health. For example, biofilms on clothing and footwear are not only detrimental to the quality of the items, they are more likely to cause skin diseases in susceptible populations. To solve this problem, efforts have been made to endow surfaces with antibacterial functions that can inhibit bacterial reproduction and biofilm formation. For an ideal antibacterial surface, it should have three functions at the same time: (1) firstly, it can resist the adhesion of bacteria on the surface; (2) it can effectively kill the adhered bacteria; (3) the killed bacteria Corpses can be removed from...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D187/00C09D5/14C08G81/00C14C11/00
CPCC08G81/00C08K3/08C08K9/04C08K2003/0806C08K2201/011C09D5/14C09D187/00C14C11/003
Inventor 刘公岩王海波
Owner CHENGDU BOYAN TECH CO LTD
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