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Silver phosphate antibacterial modified titanium dioxide composite particle and its preparation method and use

A technology of titanium dioxide and composite particles, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve problems such as difficulty in exerting antibacterial effect, affecting the appearance state and mechanical properties of products, and poor compatibility

Inactive Publication Date: 2005-11-23
中山市华铿喷涂有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the compatibility between the two is poor, it will lead to uneven distribution of antibacterial materials in the product, or even agglomeration, making it difficult to play an antibacterial effect, and will affect the apparent state and mechanical properties of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] TiO 2 The particles are stirred and dispersed into the aqueous solution with a concentration of 10% by weight. After the temperature was raised to 85°C, an aqueous solution of sodium silicate was slowly added dropwise to the mixed solution to make the TiO 2 - The initial molar ratio of sodium silicate is 5:1, and the dropwise addition time is 20 minutes. Use sulfuric acid to adjust the pH of the mixed solution to 9.5, and age for 2 hours under stirring to obtain a white turbid solution, which is settled, washed, separated, and dried to obtain TiO coated with silica. 2 Composite particles. Then this silica-coated TiO 2 The composite particles were stirred and dispersed into the aqueous solution, and the disodium hydrogen phosphate aqueous solution was slowly added to make the TiO 2 - The initial molar ratio of disodium hydrogen phosphate: 1:0.05. Then slowly add the silver-ammonia complex solution dropwise, so that the initial molar ratio of disodium hydrogen phosph...

Embodiment 2

[0060] TiO 2 The particles are stirred and dispersed into the aqueous solution with a concentration of 20% by weight. After the temperature was raised to 70°C, an aqueous solution of aluminum sulfate was slowly added dropwise to the mixed solution to make the TiO 2 - The initial molar ratio of aluminum sulfate is 5:1. Use sodium hydroxide to adjust the pH of the mixed solution to 7.0, and age for 4 hours under stirring to obtain a white turbid solution, which is settled, washed, separated, and dried to obtain TiO coated with alumina. 2 Composite particles. Then this alumina-coated TiO 2 The composite particles are stirred and dispersed into the aqueous solution, and the weight percent concentration is 20%. Slowly add disodium hydrogen phosphate aqueous solution to make TiO 2 - The initial molar ratio of disodium hydrogen phosphate is 1:0.06. Then slowly add the silver-ammonia complex solution dropwise, so that the initial molar ratio of disodium hydrogen phosphate-silver...

Embodiment 3

[0062] TiO 2 The particles are stirred and dispersed into the aqueous solution, and the weight percent concentration is 15%. After the temperature was raised to 85°C, an aqueous solution of sodium silicate was slowly added dropwise to the mixed solution to make the TiO 2 - The initial molar ratio of sodium silicate is 6:1, and the dropwise addition time is 25 minutes. Use hydrochloric acid to adjust the pH of the mixed solution to 9.5, and age for 2.5 hours under stirring to obtain a white turbid solution, which is settled, washed, separated, and dried to obtain TiO2 coated with silica. 2 Composite particles. Stir it and disperse it into the aqueous solution, the weight percent concentration is 25%. After the temperature was raised to 70°C, an aqueous solution of aluminum sulfate was slowly added dropwise to the mixed solution to make the TiO 2 - The initial molar ratio of aluminum sulfate is 1:0.04. Use sodium hydroxide to adjust the pH of the mixed solution to 7, and ag...

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Abstract

An antibacterial composite TiO2 particle modified by silver phosphate for paint, ceramics, rubber, etc. is prepared from nanometre-class or submicron-class TiO2 particle as kernel through coating SiO2 layer, alumina layer, or SiO2-alumina layer, and coating silver phosphate layer. Its advantages are high purity dispersity and sure antibacterial action.

Description

technical field [0001] The invention belongs to the field of inorganic nano-modified functional materials and applications thereof, in particular to silver phosphate antibacterial modified titanium dioxide composite particles and its preparation method and application. Background technique [0002] With the rapid development of industry and the improvement of people's living standards, the requirement to improve the living environment of human beings is becoming increasingly urgent, and antibacterial materials are an important part of environmentally friendly materials. Since the 1980s, developed countries such as the United States and Japan have begun to use antibacterial materials in large quantities in hospitals, housing, public places, and daily necessities. [0003] Titanium dioxide is an important inorganic chemical raw material, which is widely used in coatings, inks, plastics, rubber, papermaking, chemical fibers, ceramics, enamel and many oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/36C09C3/06
Inventor 唐芳琼谢永培孟宪伟
Owner 中山市华铿喷涂有限公司
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