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A kind of preparation method and application of antibacterial hydrophobic inorganic-organic hybrid antibacterial agent

A technology of organic hybridization and antibacterial agent, applied in the field of antibacterial materials, can solve the problems of unsatisfactory antibacterial effect of bacteria and mold, achieve excellent antibacterial and mold performance, good surface hydrophobicity, and improve the effect of antibacterial performance

Active Publication Date: 2020-08-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Garcia–SalinasS, NV Harohall and others have studied the antibacterial properties of natural antibacterial agents such as essential oils and cinnamaldehyde. The results show that they all have relatively good antibacterial properties, but their antibacterial effects on bacteria and molds are not satisfactory and need to be further improved.

Method used

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  • A kind of preparation method and application of antibacterial hydrophobic inorganic-organic hybrid antibacterial agent
  • A kind of preparation method and application of antibacterial hydrophobic inorganic-organic hybrid antibacterial agent

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Inorganic-organic hybrid antibacterial agent: (1) Dissolve 3-aminopropyltrimethoxysilane in 150mL of ethanol and water in an aqueous ethanol solution with a volume ratio of 1:9, add nano-titanium dioxide, ultrasonically disperse for 30min, stir for 2h, and After filtering and washing, dry at 60°C for 24 hours to obtain coupled titanium dioxide; wherein the ratio of 3-aminopropyltrimethoxysilane and nano-titanium dioxide to the total mass of the two is 0.5wt%: 99.5wt% (2) Dissolve coupled titanium dioxide in 150 mL of ethanol, add cinnamaldehyde, stir for 4 hours, filter and wash, then dry at 60°C for 24 hours to obtain cinnamaldehyde-titanium dioxide hybrid antibacterial agent; wherein the coupling The ratio of the percentages of titanium dioxide and cinnamaldehyde to the total mass of the two is 95wt%: 5wt%.

Embodiment 2

[0039] Inorganic-organic hybrid antibacterial agent: (1) Dissolve 3-aminopropyltriethoxysilane in 150mL ethanol and water ethanol aqueous solution with a volume ratio of 5:5, add nano titanium dioxide, ultrasonically disperse for 30min, stir for 2h, After filtering and washing, dry at 60°C for 24 hours to obtain coupled titanium dioxide; wherein the ratio of 3-aminopropyltriethoxysilane and nano-titanium dioxide to the total mass of the two is 5wt%: 95wt% (2) dissolving 93wt% coupled titanium dioxide in 150mL ethanol, adding 7wt% citral, stirring for 4h, filtering and washing, drying at 60°C for 24h to obtain citral-titanium dioxide hybrid antibacterial agent; The ratio of the percentages of the coupled titanium dioxide and citral to the total mass of the two is 93wt%: 7wt%.

Embodiment 3

[0043] Inorganic-organic hybrid antibacterial agent: (1) Dissolve 3-aminopropylmethyldiethoxysilane in 150mL ethanol and water ethanol aqueous solution with a volume ratio of 7:3, add nano titanium dioxide, ultrasonically disperse for 30min, stir 2h, after filtering and washing, dry at 60°C for 24h to obtain coupled titanium dioxide; wherein the ratio of 3-aminopropylmethyldiethoxysilane and nano-titanium dioxide to the total mass of the two is 7wt %: 93wt%; (2) Dissolve 93wt% coupled titanium dioxide in 150mL ethanol, add 7wt% citral, stir for 4h, filter, wash, and dry at 60°C for 24h to obtain an inorganic-organic hybrid antibacterial agent ; Wherein the ratio of the percentage of coupled titanium dioxide and citral to the total mass of the two is 93wt%: 7wt%.

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Abstract

The invention relates a preparation method of an inorganic-organic hybrid antibacterial agent with antibacterial and hydrophobic functions and application of the antibacterial agent in a polymer material matrix. The antibacterial agent overcomes the problem in the prior art that the antibacterial performance of a natural antibacterial agent cannot completely meet the demands of users when being used alone. Specifically, the antibacterial agent adopts an amino-containing coupling agent as a bridge, and antibacterial inorganic nanoparticles such as titanium dioxide and zinc oxide are coated withantibacterial aldehydes such as organic citral and cinnamaldehyde to form the inorganic-organic hybrid antibacterial agent. The inorganic-organic hybrid antibacterial agent can be widely applied to polymer materials such as PP and ABS and achieve an antibacterial and hydrophobic effect; the antibacterial rate of the antibacterial agent for gram-negative bacteria such as escherichia coli can reach99.9%, the antibacterial rate of the antibacterial agent for gram-positive bacteria such as staphylococcus aureus can reach 99.9%, the antibacterial rate of the antibacterial agent for aspergillus niger and other molds can reach 0 grade, and the contact angle between the material surface and water can reach 120 degrees. Meanwhile, the antibacterial polymer material maintains the great mechanicalproperty.

Description

technical field [0001] The invention relates to the field of antibacterial materials, in particular to a preparation method and application of an antibacterial hydrophobic inorganic-organic hybrid antibacterial agent with both hydrophobic and antibacterial functions. Background technique [0002] Microorganisms exist in all aspects of people's lives, and a large part of them are pathogenic microorganisms, which pose a greater threat to human health. However, with the development of society, people pay more and more attention to health, and put forward higher requirements for the antibacterial properties of daily necessities, hygiene products, medical products and other products that they come into contact with in life. Therefore, the research and development of antimicrobial agents have attracted more and more attention. [0003] Due to the advantages of low price, light weight and corrosion resistance, polymer materials are more and more widely used in medical supplies and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/06C08K3/22C08K5/07C08L23/12C08L55/02
CPCC08K3/22C08K5/07C08K9/06C08K2003/2241C08K2201/011C08L23/12C08L55/02
Inventor 施燕琴王旭杨蝶霜马彪鲁淞彦陈思马猛何荟文
Owner ZHEJIANG UNIV OF TECH
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