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Nano silver-chitosan-modified polybenzenesulfonamide antibacterial coating and preparation method thereof

A chitosan-modified, polybenzenesulfonamide technology, applied in coatings, polyester coatings, antifouling/underwater coatings, etc., can solve the problem of poor thermal and chemical stability of organic antibacterial agents, reduce It can improve the chemical stability and thermal stability, change the fluidity and permeability, and improve the antibacterial effect.

Active Publication Date: 2019-11-26
安徽省优亲科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the invention provides a nano-silver-chitosan modified polyphenylsulfonamide antibacterial coating and its preparation method, which solves the problem that nano-silver is easy to agglomerate to form silver particles, and reduces the size of nano-silver. The specific surface area of ​​silver reduces the problem of the contact area between nano-silver and fungi, and at the same time solves the problem of poor thermal and chemical stability of organic antibacterial agents, which makes organic antibacterial agents easy to be thermally decomposed in the actual application process, or The problem of being oxidized by oxygen in the air

Method used

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  • Nano silver-chitosan-modified polybenzenesulfonamide antibacterial coating and preparation method thereof
  • Nano silver-chitosan-modified polybenzenesulfonamide antibacterial coating and preparation method thereof

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preparation example Construction

[0027] In order to achieve the above object, the present invention provides the following technical solutions: a nano-silver-chitosan modified polyphenylsulfonamide antibacterial coating and a preparation method thereof, comprising the following formula raw materials in parts by weight: 30-35 parts 2 , 6-di-carboxybenzenesulfonyl chloride, 32-38 parts of ammonium nitrate, 0.5-1.5 parts of catalyst, 3-6 parts of sodium hydroxide, 0.4-1 part of concentrated sulfuric acid, 0.1-0.5 parts of initiator, 10-30 parts of shell Polysaccharide, 3.5-6 parts of nano silver, 0.5-2 parts of dispersant. The preparation method includes the following experimental drugs: absolute anhydrous dimethyl sulfoxide, ethyl acetate, distilled water, ethylene glycol, dilute hydrochloric acid, and the structural formula of 2,6-di-carboxybenzenesulfonyl chloride is Its mass fraction is ≥96.5%, NH in ammonium nitrate 4 NO 3 The mass fraction is ≥94.2%, and the catalyst is palladium acetate (COO - ) 2 PD...

Embodiment 1

[0033] (1) Preparation of 2,6-bis-carboxybenzenesulfonamide: feed N into a dry 1000mL three-necked bottle 2 Remove the air, add 400mL of absolute anhydrous dimethyl sulfoxide, then weigh 30 parts of 2,6-di-carboxybenzenesulfonyl chloride and 32 parts of ammonium nitrate in sequence, stir well, then slowly add 3 parts of sodium hydroxide and 0.5 parts of catalyst, put the three-necked flask in a water bath and heat it to 60°C, and 2 The reaction was stirred at a constant speed in the atmosphere for 24 hours. The reaction was observed by TLC thin-layer chromatography. After the reaction was complete, the solution in the three-necked flask was transferred to a 2000mL separatory funnel, and 500mL distilled water and 800mL ethyl acetate were added for extraction. Ethyl ester organic layer, and then add 500mL distilled water to extract twice, will obtain the ethyl acetate organic layer and remove ethyl acetate by rotary evaporator reduced-pressure distillation, then carry out thin-l...

Embodiment 2

[0038] (1) Preparation of 2,6-bis-carboxybenzenesulfonamide: feed N into a dry 1000mL three-necked bottle 2 Remove the air, add 400mL of absolute anhydrous dimethyl sulfoxide, then weigh 31 parts of 2,6-di-carboxybenzenesulfonyl chloride and 33 parts of ammonium nitrate in sequence, stir well, then slowly add 4 parts of sodium hydroxide and 0.8 parts of catalyst, the three-necked flask was placed in a water bath and heated to 60°C, and 2 The reaction was stirred at a constant speed in the atmosphere for 24 hours. The reaction was observed by TLC thin-layer chromatography. After the reaction was complete, the solution in the three-necked flask was transferred to a 2000mL separatory funnel, and 500mL distilled water and 800mL ethyl acetate were added for extraction. Ethyl ester organic layer, and then add 500mL distilled water to extract twice, will obtain the ethyl acetate organic layer and remove ethyl acetate by rotary evaporator reduced-pressure distillation, then carry out ...

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Abstract

The invention relates to the technical field of antibacterial coatings, and discloses a nano silver-chitosan-modified polybenzenesulfonamide antibacterial coating and a preparation method thereof. Theformula of the nano silver-chitosan-modified polybenzenesulfonamide antibacterial coating includes the following materials: 2,6-di-carboxybenzenesulfonyl chloride, ammonium nitrate, a catalyst, sodium hydroxide, concentrated sulfuric acid, an initiator, chitosan, nano silver and a dispersant. According to the nano silver-chitosan-modified polybenzenesulfonamide antibacterial coating and the preparation method thereof, sulfonyl imide groups in the polycarboxybenzenesulfonamide has strong reducing properties so that the antibacterial coating has good antibacterial properties, and since esterification is performed between a large number of active -OH groups which are contained in chitosan and carboxyl groups in polycarboxybenzenesulfonamide so as to form electron-withdrawing ester groups with high chemical energy; and through the electronic effect of the electron-withdrawing ester groups, the electron cloud density of the sulfonyl groups is reduced, the chemical energy of the sulfonyl groups is enhanced, and the chemical stability and thermal stability of the polycarboxybenzenesulfonamide are improved, so that the antibacterial coating has no easy oxidation by oxygen in the air or noeasy light degradation.

Description

technical field [0001] The invention relates to the technical field of antibacterial coatings, in particular to a nano-silver-chitosan modified polybenzenesulfonamide antibacterial coating and a preparation method thereof. Background technique [0002] Antibacterial coatings are coatings with antibacterial effects called antibacterial coatings. The main feature of architectural anti-mildew coatings is that such coatings have excellent anti-mildew performance. As human beings pay more attention to their own health, the living environment we live in is becoming more and more The more attention has been paid to antibacterial coatings can be directly coated on various materials. At present, there are three main categories of antibacterial agents for coatings: natural antibacterial agents, organic antibacterial agents and inorganic antibacterial agents. Inorganic antibacterial agents, especially nano-silver, have antibacterial properties far greater than traditional silver ion ba...

Claims

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Application Information

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IPC IPC(8): C09D167/02C09D5/14C08G63/688
CPCC08G63/6886C08K2003/0806C08K2201/011C09D5/14C09D167/02C08K3/08
Inventor 王欢
Owner 安徽省优亲科技发展有限公司
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