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Silver-loading modified montmorillonite antibacterial agent, preparation method and application thereof

A technology of montmorillonite and antibacterial agent, which is applied in the field of silver-loaded modified montmorillonite antibacterial agent and its preparation, can solve the problems of unsuitable modified montmorillonite antibacterial materials, achieve good application and promotion prospects, and be easy to control , the effect of little damage to the comprehensive mechanical properties

Inactive Publication Date: 2015-07-01
GUANGDONG PHARMA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in view of the toxicity of mercaptans, it is not suitable for modifying montmorillonite to prepare safe antibacterial materials

Method used

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  • Silver-loading modified montmorillonite antibacterial agent, preparation method and application thereof
  • Silver-loading modified montmorillonite antibacterial agent, preparation method and application thereof
  • Silver-loading modified montmorillonite antibacterial agent, preparation method and application thereof

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preparation example Construction

[0037] The preparation method of the silver-loaded modified montmorillonite antibacterial agent of the present invention is: under acidic conditions, the montmorillonite is modified by using sulfur-containing amino acids to obtain the modified montmorillonite, and then the silver salt solution is passed through the ions under microwave irradiation. The silver ions are loaded on the modified montmorillonite by exchange, and the silver ions are converted into nano-silver by ultraviolet irradiation to obtain the silver-loaded modified montmorillonite antibacterial agent. Specifically include the following steps:

[0038] (1) Using sulfur-containing amino acids to modify montmorillonite to obtain modified montmorillonite;

[0039] (2) Prepare silver salt aqueous solution, add modified montmorillonite, and disperse evenly;

[0040] (3) After microwave-assisted reaction for 2 to 10 minutes, wash, dry, and grind to obtain the precursor;

[0041] (4) The precursor is irradiated with...

Embodiment 1

[0054] (1) Preparation of modified montmorillonite

[0055] Take 1g of sodium montmorillonite (Na-MMT) and disperse it in 100ml of deionized water, stir at 60°C for 1 hour to obtain a suspension of montmorillonite; in another beaker, add 1.9g of sulfur-containing amino acid and 100ml of deionized Add 0.1 mol / L of HCl at 60°C to adjust the pH to 1.8 to obtain an aqueous solution of sulfur-containing amino acids; add the aqueous solution of sulfur-containing amino acids to the montmorillonite suspension, and stir for 1 hour at 60°C. Cool to room temperature, wash and filter until the filtrate is washed with 0.1mol / L AgNO 3 No white precipitate was detected; finally, the product was placed in an oven, heated and dried at 70°C to constant weight, and the obtained solid was ground into fine powder to obtain modified montmorillonite (AA-MMT).

[0056] (2) Preparation of silver-loaded modified montmorillonite antibacterial agent

[0057] Add AA-MMT to 10ml of 0.2 mol / L silver nitra...

Embodiment 2

[0067] (1) Preparation of modified montmorillonite

[0068] Get 2g of calcium-based montmorillonite and disperse it in 100ml deionized water to obtain a montmorillonite suspension; in another beaker, add 0.5g of cystine and 100ml of deionized water, and adjust the pH value to 1.2 to obtain Cystine aqueous solution: add cystine aqueous solution to montmorillonite suspension, heat up to 70°C, stir and react for 1 hour, then cool to room temperature, wash and filter until the filtrate is washed with AgNO 3 No white precipitate was detected; finally, the product was dried to constant weight and ground into fine powder to obtain modified montmorillonite.

[0069] (2) Preparation of silver-loaded modified montmorillonite antibacterial agent

[0070] Add the modified montmorillonite to 20ml of 0.2 mol / L silver nitrate aqueous solution, raise the temperature to 60°C, stir to disperse evenly, then place it in a microwave generator, react for 10 minutes at a power of 400W, cool, wash a...

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Abstract

The invention discloses a silver-loaded modified montmorillonite antibacterial agent, a preparation method and an application thereof. The antibacterial agent uses sulfur-containing amino acid-modified montmorillonite as the carrier for loading silver ions. Firstly, the sulfur-containing amino acid is used to modify the montmorillonite, and then the silver ions are loaded between the modified montmorillonite layers through ion exchange. Silver ions are transformed into nano-silver by means of ultraviolet radiation, and a silver-loaded modified montmorillonite antibacterial agent is obtained. The silver-loaded modified montmorillonite antibacterial agent of the present invention has good antibacterial performance, and can be mixed into plastics, coatings, adhesives, ceramic materials and products thereof, so that it has excellent antibacterial function.

Description

technical field [0001] The invention belongs to the technical field of antibacterial materials, in particular to a silver-loaded modified montmorillonite antibacterial agent and its preparation method and application. Background technique [0002] In daily life, people will inevitably come into contact with various bacteria such as mold, Escherichia coli, and Staphylococcus aureus, and incidents of human death due to infectious diseases caused by bacteria also occur frequently. Therefore, it is of great practical significance to inhibit the growth and reproduction of harmful microorganisms and reduce diseases by using antibacterial materials. Silver-based antibacterial agents are based on the fact that on the one hand, they can chelate or adsorb with molecules such as proteins and enzymes, hindering the normal metabolism of bacteria; The oxidation reaction of organic matter causes the phosphodiester bond between the bases in the DNA chain to break, destroys the DNA replicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/16A01P1/00C08L23/12C08K3/08C08K9/04C08K3/34
Inventor 李田林偶连鲁智远何柳镅王晓声
Owner GUANGDONG PHARMA UNIV
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