Preparation method of antibacterial sepiolite powder

A technology of sepiolite and antibacterial powder, which is applied in the fields of botanical equipment and methods, chemicals for biological control, animal repellants, etc., can solve the problems of poor performance, inability to effectively control distribution, and insufficient whiteness of antibacterial materials. and other problems to achieve the effect of reducing prices, ensuring broad-spectrum antibacterial properties, and overcoming poor heat resistance

Active Publication Date: 2016-06-08
XIANGTAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the high industrial cost and poor performance of antibacterial powder carriers in the prior art, the insufficient whiteness of antibacterial materials, and the inability to effectively control the size, shape, and distribution of metal particles that are loaded, the present invention provides a sepiolite antibacterial powder preparation method

Method used

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  • Preparation method of antibacterial sepiolite powder

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Effect test

Embodiment 1

[0024] A preparation method of sepiolite antibacterial powder, comprising the steps of:

[0025] (1) Activation of sepiolite: add hydrochloric acid with a concentration of 0.75mol / L to sepiolite at a solid-to-liquid ratio of 1:15 for activation, and dry at 105°C for 12 hours to obtain activated sepiolite. BET characterization shows that the specific surface area of ​​activated sepiolite is 194m 2 / g, pore diameter 49nm, pore volume 20cm 3 / g.

[0026] (2) Dissolve 1.332g of AOT in 40ml of cyclohexane, stir it at low speed to dissolve, divide it into A and B evenly, add 0.27ml, 0.06mol / L silver nitrate solution to A, add 0.27ml, 0.4mol to B / L hydrazine hydrate solution, after 40 minutes, the micellar solution A was added dropwise in the micellar solution B, and stirred at high speed for 1 hour to obtain the nano-silver micellar solution.

[0027] (3) Add the activated sepiolite in step (1) to the nano-silver micellar solution in step (2), stir thoroughly for 36 hours to ful...

Embodiment 2

[0032] A preparation method of sepiolite antibacterial powder, comprising the steps of:

[0033] (1) Sepiolite activation: Add sulfuric acid with a concentration of 0.5mol / L to the sepiolite according to the solid-to-liquid ratio of 1:10 for activation, and dry at 105°C for 12 hours to obtain activated sepiolite. BET characterization shows that the specific surface area of ​​activated sepiolite is 204m 2 / g, pore diameter 50nm, pore volume 22cm 3 / g.

[0034] (2) Dissolve 1.776g of AOT in 40ml of cyclohexane, stir at a low speed to dissolve it, divide it into A and B evenly, add 0.27ml, 0.05mol / L silver nitrate solution to A, add 0.27ml, 0.4mol to B / L hydrazine hydrate solution, after 30 minutes, the micellar solution A was added dropwise in the micellar solution B, and stirred at high speed for 2 hours to obtain the nano-silver micellar solution.

[0035] (3) Add the activated sepiolite in step (1) to the nano-silver micellar solution in step (2), stir thoroughly for 36 h...

Embodiment 3

[0040] A preparation method of sepiolite antibacterial powder, comprising the steps of:

[0041] (1) Sepiolite activation: add hydrochloric acid with a concentration of 1mol / L to the sepiolite at a solid-to-liquid ratio of 1:20 for activation, and dry at 105°C for 12 hours to obtain activated sepiolite. BET characterization shows that the specific surface area of ​​activated sepiolite is 180m 2 / g, pore diameter 49nm, pore volume 23cm 3 / g.

[0042] (2) Dissolve 0.888g CTAB in 40ml of n-octane, stir it at low speed to dissolve, and divide it into A and B evenly, add 0.27ml, 0.05mol / L silver citrate solution to A, add 0.27ml, 0.4 mol / L sodium borohydride solution, after 30 minutes, micellar solution A was added dropwise into micellar solution B, and stirred at high speed for 2 hours to obtain nano-silver micellar solution.

[0043] (3) Add the activated sepiolite in step (1) to the nano-silver micellar solution in step (2), stir thoroughly for 36 hours to fully combine the t...

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Abstract

The invention discloses a preparation method of antibacterial sepiolite powder. The preparation method comprises the steps of sepiolite acid activation, preparation of a nano-silver micellar solution, absorption of nano-silver particles in the nano-silver micellar solution through sepiolite and the like. According to the preparation method, a surface active agent emulsion is adopted to produce a 'nano-pool' through self-assembly, a polymer monomer serving as an oil phase and a silver ion water solution and a reducing agent water solution serving water phases are mixed to form a nano-silver reversed-micelle micro-emulsion, and the sizes of the nano-silver particles can be controlled by controlling the size of the 'nano-pool'. In addition, the nano-silver particles in modified sepiolite adsorption sol are utilized, the prepared antibacterial powder overcomes the shortcomings of poor heat resistance, likely hydrolysis, volatility and high toxicity and has the safety and the heat resistance of inorganic antibacterial powder, and the price of an antibacterial agent is reduced. Furthermore, the antibacterial broad spectrum activity is ensured, and accordingly the preparation method can be widely applied to the fields of building materials, medical facilities, medical apparatuses and instruments, daily supplies and the like.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a preparation method of sepiolite antibacterial powder. Background technique [0002] With the development of society and the improvement of people's living standards, a healthy living environment has increasingly become the goal pursued by human beings. Therefore, it is of great significance to inhibit the growth and reproduction of harmful microorganisms and reduce diseases through antibacterial agents. [0003] At present, the methods for preparing antibacterial agents are mainly adsorption method, chemical precipitation method, ion exchange method, sol-gel method, microemulsion method, etc. Compared with organic antibacterial agents, inorganic antibacterial agents have better high temperature resistance, safety and longer service life. Therefore, it is of great significance to study inorganic antibacterial agents, and the selection of inorganic carriers and the improveme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N25/08A01P1/00
CPCA01N25/08A01N59/16
Inventor 刘平乐吴生焘郝芳熊绍峰罗和安
Owner XIANGTAN UNIV
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