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Preparation method of stable sepiolite antibacterial powder

A technology of sepiolite and antibacterial powder is applied in the fields of botanical equipment and methods, fungicides, preservation of human or animal body, etc. The effect of prolonging the service life and maintaining the antibacterial effect

Inactive Publication Date: 2017-05-17
XIANGTAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although their preparation process is relatively simple, in the actual environment such as acid, alkali or organic, the antibacterial components are easily decomposed or released earlier, which shortens their service life, which is not conducive to application in building materials, medical facilities and medical equipment, Daily necessities and other fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Sepiolite activation: At 75°C, activate the sepiolite with 0.75mol / L hydrochloric acid for 10 hours at a solid-to-liquid ratio of 1:15, wash and filter until neutral, and add 0.05 mol / L sodium dodecylbenzenesulfonate (SDBS), soaked at 30°C for 18 hours, filtered with suction and washed 3 times with absolute ethanol, dried, and ground for later use to obtain activated sepiolite;

[0025] (2) Add the activated sepiolite obtained in step (1) to 0.1mol / L AgNO 3 solution, stirred at room temperature for 36 hours to fully combine the two, filtered, washed with distilled water until no Ag ions existed, dried, and ground for later use;

[0026] (3) Take the antibacterial powder obtained in step (2) and add it to the aqueous solution of ethyl orthosilicate and acetic acid at a solid-to-liquid ratio of 1:15, wherein the molar ratio of water, ethyl orthosilicate and acetic acid is 0.833: 0.005:0.009, react at room temperature for 90 minutes, filter, wash and dry to obtain the...

Embodiment 2

[0033] (1) Sepiolite activation: at 65°C, activate the sepiolite with 1mol / L nitric acid for 10 hours at a solid-to-liquid ratio of 1:15, wash and filter until neutral, add 0.02mol at a solid-to-liquid ratio of 1:25 / L sodium dodecylbenzenesulfonate (SDBS), impregnated at 30°C for 20 hours, filtered with suction and washed 3 times with absolute ethanol, dried, ground for later use, and activated sepiolite was obtained;

[0034] (2) Add the activated sepiolite obtained in step (1) to 0.09mol / L chitosan solution respectively, stir at room temperature for 24 hours, fully combine the two, filter, dry, and grind for later use;

[0035] (3) Add the antibacterial powder obtained in step (2) to the aqueous solution of sodium silicate and hydrochloric acid at a solid-to-liquid ratio of 1:15, wherein the molar ratio of water, sodium silicate and hydrochloric acid is 0.733:0.010:0.011, React at room temperature for 90 minutes, filter, wash, and dry to obtain the product.

[0036] (4) Ta...

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Abstract

The invention discloses a preparation method of stable sepiolite antibacterial powder. The preparation method comprises the following steps: activating of sepiolite, antibacterial treatment of the sepiolite, silica coating and the like. According to the preparation method disclosed by the invention, acid and a surfactant are respectively adopted for modifying the sepiolite, so that the specific surface area of an antibacterial material can be increased, and the adsorption quantity of a carrier on silver ions, chitosan and the like is further increased; simple physical adsorption is changed into chemical adsorption, so that release of silver is slowed down, and the long-time antibacterial effect is kept; after the modified sepiolite is utilized for adsorbing nano silver and the chitosan, drying treatment and milling are carried out, antibacterial powder is dispersed into a water solution or an organic solvent, silicon compounds and catalysts are added for carrying out coating reaction, the stability of the obtained antibacterial powder is remarkably increased, and not only can antibacterial broad spectrum be still ensured under severe environment of acid, base, organism, strong ultraviolet radiation and the like, but also the release of antibacterial active components can be slowed down by coating one layer of SiO2, so that the service life of the stable sepiolite antibacterial powder is prolonged.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a method for preparing a stable sepiolite antibacterial powder. Background technique [0002] Today, with the rapid development of science and technology, how to better control and eliminate the growth and reproduction of harmful microorganisms, and how to more effectively carry out antibacterial, sterilizing, disinfection and disease prevention have become a problem closely related to human health and life. It can be foreseen that the R&D and production of efficient and long-term stable antibacterial products will surely serve the development of my country's national economy, contribute to the improvement of people's quality of life, and play a very positive role in improving my country's economic and social benefits. [0003] At present, compared with organic antibacterial agents, inorganic antibacterial agents have better high temperature resistance, safety and non-toxicity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N43/16A01N25/08A01P1/00A01P3/00
CPCA01N59/16A01N25/08A01N43/16A01N2300/00
Inventor 刘平乐吴生焘郝芳熊伟熊绍锋
Owner XIANGTAN UNIV
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