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Preparation method for discoloration tolerant antibacterial material of silver-loaded titanium phosphate

A technology of silver-loaded phosphoric acid and antibacterial materials, applied in metal material coating process, liquid chemical plating, coating and other directions, can solve problems such as affecting the use effect.

Inactive Publication Date: 2005-11-30
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its discoloration during use, it affects its actual use effect

Method used

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  • Preparation method for discoloration tolerant antibacterial material of silver-loaded titanium phosphate
  • Preparation method for discoloration tolerant antibacterial material of silver-loaded titanium phosphate
  • Preparation method for discoloration tolerant antibacterial material of silver-loaded titanium phosphate

Examples

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Effect test

example 1

[0014] Example 1. Dissolve 2.5 g of titanium sulfate and 0.061 g of urea in water, add 10 g of sodium titanium phosphate block, put it in a 50°C water bath, and stir the solution for 6 hours. After drying the coated sodium titanium phosphate block, heat and keep it at 600°C for 1h in the atmosphere, and then exchange it with 1.0% silver nitrate solution at 20°C for 0.5h. 1%. The silver-loaded sodium titanium phosphate block was heated and kept at 600° C. for 6 hours in the atmosphere. Expose the block under direct sunlight for 48 hours, and measure it with a SBD-1 digital whiteness meter. The whiteness of the block is 89%. The antibacterial performance of the sodium titanium phosphate block is tested by the oscillation method. The antibacterial rate can be Reach 99%.

example 2

[0015] Example 2. Dissolve 1.83 g of titanyl sulfate and 0.061 g of urea in water, add 10 g of titanium calcium phosphate blocks, put in a 70°C water bath, and stir the solution for 3 hours. After drying the coated titanium calcium phosphate block, heat and keep it at 500°C for 4h in the atmosphere, then use 4.0% silver nitrate solution at 50°C for silver ion exchange, after 0.5h exchange the amount of silver loaded up to 3%. The silver-loaded calcium titanium phosphate block was heated and kept at 800° C. for 0.5 h under atmospheric atmosphere. This block is exposed to the sun for 48h under direct sunlight, measured according to the same method as in Example 1, the whiteness of the block is 90%, and the antibacterial performance of the calcium titanium phosphate block is tested by the oscillation method, and its antibacterial rate can reach 99%.

example 3

[0016] Example 3. Dissolve 2.5 g of titanium sulfate and 0.305 g of urea in water and mix well, add 10 g of lithium titanium phosphate block, put in a 90°C water bath, and stir the solution for 6 hours. After drying the coated lithium titanium phosphate block, heat it at 700°C for 1h in the atmosphere, and then exchange it with 20% silver nitrate solution at 30°C for 0.5h. 10%. The silver-loaded lithium titanium phosphate block was heated and kept at 1000° C. for 6 hours in the atmosphere. The block was exposed to the sun for 48 hours under direct sunlight, measured according to the same method as Example 1, the whiteness of the block was 90%, and the antibacterial performance of the lithium titanium phosphate block was tested by the oscillation method, and the antibacterial rate could reach 99%.

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Abstract

The invention belongs to the field of antimicrobial material. It aims at improving the liable color change of silver-carried phosphoric titanate. It contains the following steps: using titanic sulfate or titanoxy sulfate as raw material, and mixing urea as adjuvant to prepare solution, the mass ratio of titanic sulfate to urea being 40: 1- 40: 5, titanoxy sulfate to urea being 30: 1- 30: 5; adding block or powder of phosphoric titanate into the solution, heating by water-bath of temperature of 50-90 Deg. C and stirring for 3-6 hours to deposit titanium-contained substance film on the surface of phosphoric titanate; annealing in the air and the temperature of 500-700 Deg. C by 1-4 hours; exchanging silver ion in silver nitrate water solution of a mass ratio concentration of 1-20% in 20-50 Deg. C by 0.5-4 hours to prepare silver-carried phosphoric titanate material, carrying silver mass being 1-10% by mass, annealing the silver-carried phosphoric titanate complex in 600-1000 Deg. C by 0.5-6 hours. The whiteness can amount to over 89%, antibiosis ratio to 99%, it keeping the fine exterior of material, applying extensively to preparing antimicrobial material in plastic, coating, timber and so on.

Description

technical field [0001] The invention discloses a preparation method of anti-discoloration silver-loaded titanium phosphate antibacterial material, which belongs to the technical field of antibacterial materials. Background technique [0002] Antibacterial materials are new materials that have been developed rapidly in the past 10 years, mainly composed of carrier materials and antibacterial components. The carrier material plays the role of dispersing antibacterial components, and the antibacterial components are dispersed in the carrier to play an antibacterial effect. Due to its good antibacterial properties, silver is the most widely used antibacterial component in antibacterial materials. It is often ionically combined into various materials to make silver-containing antibacterial materials. However, due to the active chemical properties of silver ions, antibacterial materials often change color due to the reduction of silver ions to light during use. Therefore, the pr...

Claims

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Application Information

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IPC IPC(8): C23C18/16
Inventor 严建华张彩英
Owner BEIJING UNIV OF TECH
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