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High-specific-surface-area silver-loaded titanium dioxide composite antibacterial material and preparation method thereof

A compound antibacterial and high specific surface technology, applied in titanium dioxide, titanium oxide/hydroxide, medical science, etc., can solve the problems of high production cost, complex synthesis process, low specific surface area, etc., and achieve convenient operation and simple preparation process , broad-spectrum antibacterial effect

Active Publication Date: 2015-08-19
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] What the present invention will solve is Ag / TiO 2 The synthesis process is complicated, the production cost is high, and the generated Ag / TiO 2 Defects such as low specific surface area, thus providing a high specific surface area of ​​Ag / TiO 2 Composite antibacterial material and preparation method thereof

Method used

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  • High-specific-surface-area silver-loaded titanium dioxide composite antibacterial material and preparation method thereof
  • High-specific-surface-area silver-loaded titanium dioxide composite antibacterial material and preparation method thereof
  • High-specific-surface-area silver-loaded titanium dioxide composite antibacterial material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] This embodiment is used to prepare TiO 2 Powder.

[0036] Dissolve the titanium source in distilled water 1 to obtain a titanium source aqueous solution; dissolve the pore-forming agent in distilled water 2 to obtain a pore-forming agent solution; mix the titanium source aqueous solution and pore-forming agent aqueous solution with a dispersant and a precipitating agent, stir for 10 minutes, and then In an oscillating water bath, react at 90r / min and 80°C for 4h, cool to room temperature, and filter with suction to obtain a crude product of antibacterial material; the crude product of antibacterial material is then washed with distilled water to remove precipitant, dispersant, pore-forming agent and Impurities, until the filtrate with BaCl 2 No precipitation was detected, and dried at 80°C for 4 hours to obtain TiO 2 Powder material sample A1.

[0037] The mass ratio of titanium source, distilled water 1, pore-forming agent, distilled water 2, dispersant and precipit...

Embodiment 2～4

[0039] A high specific surface Ag / TiO 2 The preparation method of composite antibacterial material comprises the following steps:

[0040] The reaction process is completed under dark conditions: dissolving the titanium source in distilled water 1 to obtain a titanium source aqueous solution, dissolving the silver source in distilled water 2 to obtain a silver source aqueous solution, dissolving the pore-forming agent in distilled water 3 to obtain a pore-forming agent aqueous solution; Titanium source aqueous solution, silver source aqueous solution, pore-forming agent aqueous solution, dispersant and precipitant are mixed and stirred for 20 minutes, then reacted in a shaking water bath for 5 hours at 100r / min and 90°C, cooled to room temperature and suction filtered to obtain a composite The crude product of antibacterial material; the crude product of composite antibacterial material is washed with distilled water to remove precipitant, dispersant, pore-forming agent and im...

Embodiment 5

[0054] This embodiment is used to illustrate the antibacterial performance of the composite antibacterial coating material provided by the present invention.

[0055] Adopt bacteriostatic zone test, according to "disinfection technical specification" (2002 version) 2.1.8.2 bacteriostatic zone test and Clinical Laboratory Standards Association (ClinicalandLaboratoryStandardsInstitute, CLSI) regulations utilize bacteriostatic agent to dissolve continuously to form different concentration gradients through agar diffusion, with show its antibacterial effect. This method is the TiO of embodiment 1 2 Powder A1 and Ag / TiO in Examples 2-4 2 Composite antibacterial materials A2-A4 were respectively dissolved in water and then adsorbed on filter paper with a diameter of 6 mm. Put the filter paper on an agar plate with a bacterial concentration of 38.5 CFU / mL, and after incubating at a constant temperature of 37°C for 18 hours, measure the diameter of the inhibition zone. The antibact...

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Abstract

The invention provides a high-specific-surface-area silver-loaded titanium dioxide composite antibacterial material and a preparation method thereof and belongs to the technical field of antibacterial materials. The high-specific-surface silver-loaded titanium dioxide composite antibacterial material is synthesized by taking a titanium source, a silver source and a precipitant as reactants and adding a dispersant and a pore-forming agent through a homogeneous precipitation method. The composite antibacterial material is formed by compounding metal Ag and TiO2; the TiO2 with an anatase structure has a spherical shape and the grain diameter is 2-5 microns; the metal Ag is uniformly distributed on the surface of the TiO2; after the metal Ag particles are added, the grain diameter of Ag / TiO2 composite powder is 2-5 microns. The preparation method has a simple preparation process and good repeatability; the used pore-forming agent can be removed along the proceeding of the reaction and subsequence product treatment, and an extra treatment step of removing the pore-forming agent is not needed, so that the operation is convenient. The antibacterial material has the high specific surface area of 354.06m<2> / g-363.28m<2> / g; the contact area between the material and bacteria is large and the antibacterial efficiency can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of antibacterial materials, and in particular relates to a high specific surface silver-loaded titanium dioxide composite antibacterial material and a preparation method thereof. Background technique [0002] The struggle between human beings and bacteria has never stopped from beginning to end. From the anti-corrosion technology of ancient people two thousand years ago to the current anti-bacterial materials, with the advancement of science and technology and the improvement of human understanding, anti-bacterial methods have been continuously improved. In addition, with the enhancement of people's health awareness, the demand for antibacterial materials and antibacterial products is also increasing rapidly. [0003] The core component of antibacterial materials is antibacterial agent. According to the difference of effective antibacterial ingredients in materials, antibacterial materials are divided into ...

Claims

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Application Information

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IPC IPC(8): A61L27/30A61L27/54A61L27/50C01G23/053
Inventor 罗云纲翁升欣赵旭刘国民关岳锋
Owner JILIN UNIV
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