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Quaternary ammonium salt antibacterial composite silicone rubber and synthesis method thereof

A technology of compounding silicone rubber and a synthesis method, which is applied in the directions of paints, coatings, antifouling/underwater coatings containing biocides, etc. Excellent antibacterial ability, ensure antibacterial ability, improve the effect of poor mechanical properties

Active Publication Date: 2022-05-10
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional antibacterial agents based on natural or low-molecular-weight compounds have many limitations, such as easy drug resistance, volatility, and environmental pollution and toxicity to the human body caused by the spread of killing bacteria.

Method used

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  • Quaternary ammonium salt antibacterial composite silicone rubber and synthesis method thereof
  • Quaternary ammonium salt antibacterial composite silicone rubber and synthesis method thereof
  • Quaternary ammonium salt antibacterial composite silicone rubber and synthesis method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Methylated branched polyethyleneimine (1 g), cetyl chloroacetate (3.9352 g, 0.0123 mol) and toluene (5 ml) were added and stirred at 50° C. for 24 hours. After the reaction is finished, the solvent is removed to obtain a long-chain alkyl modified methylated branched polyethyleneimine.

[0030] A certain amount of the resulting modified methylated branched polyethyleneimine (2.25g) was dissolved in 3-glycidyloxypropyltrimethoxysilane (3g), and polydimethylsiloxane ( 10 g) was stirred at 50 °C for 24 h. Dioctyltin dilaurate (0.06 g) was then added and stirred for 5 minutes. The prepared mixture was coated on the substrate and cured at room temperature for 7 days to obtain the silicone rubber with antibacterial properties.

Embodiment 2

[0032] Methylated branched polyethyleneimine (1 g), cetyl chloroacetate (1.6865 g, 0.0053 mol) and xylene (5 ml) were added and stirred at 120° C. for 1 hour. After the reaction is finished, the solvent is removed to obtain a long-chain alkyl modified methylated branched polyethyleneimine.

[0033] A certain amount of the resulting modified methylated branched polyethyleneimine (1.2g) was dissolved in 3-glycidyloxypropyltrimethoxysilane (3g), and polydimethylsiloxane ( 10 g) was stirred at 120 °C for 1 h. Dioctyltin dilaurate (0.06 g) was then added and stirred for 5 minutes. The prepared mixture was coated on the substrate and cured at room temperature for 7 days to obtain the silicone rubber with antibacterial properties.

Embodiment 3

[0035] Add methylated branched polyethyleneimine (1 g), cetyl chloroacetate (2.8109 g, 0.0088 mol) and N, N-dimethylformamide (5 ml), and stir at 60 ° C for 24 hours . After the reaction is finished, the solvent is removed to obtain a long-chain alkyl modified methylated branched polyethyleneimine.

[0036] A certain amount of the resulting modified methylated branched polyethyleneimine (1.75g) was dissolved in 3-glycidyloxypropyltrimethoxysilane (3g), and polydimethylsiloxane ( 10 g) was stirred at 60 °C for 12 h. Dioctyltin dilaurate (0.06 g) was then added and stirred for 5 minutes. The prepared mixture was coated on the substrate and cured at room temperature for 7 days to obtain the silicone rubber with antibacterial properties.

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Abstract

The synthetic method comprises the following steps: adding methylated branched polyethyleneimine, long-chain halogenated hydrocarbon and a solvent, and stirring for 1 to 24 hours at the temperature of 50 to 120 DEG C; after the reaction is finished, removing the solvent to obtain long-chain alkyl modified methylated branched polyethyleneimine; dissolving the long-chain alkyl modified methylated branched polyethyleneimine in a compatibilization cross-linking agent, adding polydimethylsiloxane, and stirring for 1-24 hours at the temperature of 50-120 DEG C; then adding a catalyst, and stirring for 3-5 minutes; and coating a substrate with the prepared mixture, and curing at room temperature for 1 hour to 7 days to obtain the quaternary ammonium salt antibacterial composite silicone rubber. The antibacterial silicone rubber obtained by the invention has better antibacterial ability, and has the advantages of excellent chemical stability, non-volatility, long-term activity and the like compared with a traditional micromolecular antibacterial material.

Description

technical field [0001] The invention relates to the field of antibacterial materials, in particular to a quaternary ammonium salt antibacterial composite silicone rubber and a synthesis method thereof. Background technique [0002] Microorganisms have long been a threat to human health and social development. Every year, countless people, animals and plants die from infectious diseases caused by bacteria, viruses and fungi. Conventional antibacterial agents based on natural or low molecular weight compounds have many limitations, such as easy drug resistance, volatility, and environmental pollution and toxicity to the human body caused by the proliferation of killing bacteria. [0003] Antibacterial polymers prepared based on the antibacterial theory of quaternary ammonium salts have strong antibacterial properties. Generally, quaternary ammonium salts are composed of two parts, a hydrophilic part (ammonium cation) and a hydrophobic part (hydrophobic alkyl chains of differe...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D179/02C09D5/14C09D7/63C08G73/02
CPCC09D183/04C09D5/14C09D7/63C08G73/0226C08G73/022C08G2150/00C08L79/02C08K5/5435Y02A50/30
Inventor 韩金仇涛磊毛超一官羽陈权钟明强
Owner ZHEJIANG UNIV OF TECH
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