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Organic-inorganic montmorillonite composite antibacterial material and preparation method thereof

A technology of compound antibacterial and montmorillonite, applied in the field of antibacterial materials, can solve the problem that Gram-positive bacteria and negative bacteria cannot show good resistance and other problems

Pending Publication Date: 2022-03-25
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, antibacterial materials mainly use montmorillonite as a carrier, but the existing antibacterial materials cannot show good resistance to Gram-positive bacteria and negative bacteria at the same time

Method used

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  • Organic-inorganic montmorillonite composite antibacterial material and preparation method thereof
  • Organic-inorganic montmorillonite composite antibacterial material and preparation method thereof
  • Organic-inorganic montmorillonite composite antibacterial material and preparation method thereof

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preparation example Construction

[0020] The invention provides a kind of preparation method of organic-inorganic montmorillonite composite antibacterial material, comprising the following steps:

[0021] (1) activating after mixing the montmorillonite concentrate with water and an acidic solution, to obtain acid leaching montmorillonite;

[0022] (2) the acid-leached montmorillonite obtained in the step (1) is mixed with water to obtain a montmorillonite dispersion;

[0023] (3) The montmorillonite dispersion liquid obtained in the step (2) is mixed with cetylpyridine and copper chloride and then loaded to obtain an organic-inorganic montmorillonite composite antibacterial material.

[0024] In the invention, the montmorillonite concentrate is mixed with water and an acidic solution, and then activated to obtain the acid-leached montmorillonite. The present invention carries out activation treatment to montmorillonite, makes montmorillonite undergo acidification reaction in acidic solution, makes silicon, ir...

Embodiment 1

[0058] The preparation method of organic-inorganic montmorillonite composite antibacterial material is composed of the following steps:

[0059] (1) Mix 5g of montmorillonite concentrate (montmorillonite content greater than 90%) with 250mL of distilled water to obtain a slurry; wherein, the mass ratio of montmorillonite concentrate to distilled water is 1:50;

[0060] (2) Mix the pulp obtained in the step (1) with 0.1mol / L hydrochloric acid solution, activate it at 95°C for 5h, filter it, wash it with distilled water until the pH of the washing solution is 7, and dry it at 60°C to obtain Acid leaching montmorillonite; wherein, the volume ratio of pulp to hydrochloric acid solution is 5:1;

[0061] (3) 2g acid-leached montmorillonite obtained in said step (2) is mixed with 100mL distilled water under ultrasonic stirring conditions to obtain a montmorillonite dispersion; wherein the mass ratio of acid-leached montmorillonite to distilled water is 1: 50, the stirring speed duri...

Embodiment 2

[0064] The preparation method of organic-inorganic montmorillonite composite antibacterial material is composed of the following steps:

[0065] (1) Mix 5g of montmorillonite concentrate (montmorillonite content greater than 90%) with 250mL of distilled water to obtain a slurry; wherein, the mass ratio of montmorillonite concentrate to distilled water is 1:50;

[0066] (2) Mix the pulp obtained in the step (1) with 0.2mol / L hydrochloric acid solution, activate it at 95°C for 5h, filter it, wash it with distilled water until the pH of the washing solution is 7, and dry it at 60°C to obtain Acid leaching montmorillonite; wherein, the volume ratio of pulp to hydrochloric acid solution is 5:1;

[0067] (3) 2g acid-leached montmorillonite obtained in said step (2) is mixed with 100mL distilled water under ultrasonic stirring conditions to obtain a montmorillonite dispersion; wherein the mass ratio of acid-leached montmorillonite to distilled water is 1: 50, the stirring speed duri...

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Abstract

The invention provides a preparation method of an organic-inorganic montmorillonite composite antibacterial material, which comprises the following steps: mixing montmorillonite concentrate with water and an acidic solution, and activating to obtain acid-leached montmorillonite; mixing the acid-leached montmorillonite with water to obtain a montmorillonite dispersion liquid; and mixing the montmorillonite dispersion liquid with cetylpyridine and copper chloride, and carrying out loading to obtain the organic-inorganic montmorillonite composite antibacterial material. According to the invention, the acid-leached montmorillonite is taken as a carrier, and the structure and layer charge of the montmorillonite are changed through acid leaching treatment, so that the antibacterial property of the material is effectively improved; the acid-leached montmorillonite is mixed with water, so that the acid-leached montmorillonite can be uniformly dispersed in a solution, and the subsequent loading of an organic antibacterial agent cetylpyridine and an inorganic antibacterial agent copper chloride is facilitated, so that the broad-spectrum performance of the antibacterial material is realized, and the antibacterial material can simultaneously show good resistance to gram-positive bacteria and gram-negative bacteria.

Description

technical field [0001] The invention belongs to the technical field of antibacterial materials, and in particular relates to an organic-inorganic montmorillonite composite antibacterial material and a preparation method thereof. Background technique [0002] Antibacterial agents with bactericidal and antibacterial functions are considered to be effective substitutes for antibiotics. They can produce antibacterial active components to achieve antibacterial effects and are not easy to make bacteria resistant. Compared with traditional physical and chemical antibacterial methods The antibacterial method of using antibacterial agents also has the characteristics of strong applicability, small irritation, mild effect, and is not easy to cause allergic reactions. When used, it is usually necessary to load antibacterial agents on the carrier to improve its dispersibility, stability, performance and safety. [0003] At present, antibacterial materials mainly use montmorillonite as ...

Claims

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Application Information

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IPC IPC(8): A01N59/20A01N43/40A01N25/08A01P1/00A61K31/4425A61K33/34A61K47/02A61P31/04
CPCA01N59/20A01N43/40A01N25/08A61K31/4425A61K33/34A61K47/02A61P31/04A61K2300/00
Inventor 孙志明郑水林李盛平张晓雨
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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