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Delay-released inorganic nano antiseptic with high whiteness and its prepn

An inorganic nano, slow-release technology, applied in the fields of botanical equipment and methods, biocides, animal repellents, etc., can solve the problems of difficult to maintain antibacterial properties, poor antibacterial stability, easy to darken color, etc., and achieve tight bonding. , long-term antibacterial ability, the effect of maintaining antibacterial ability

Inactive Publication Date: 2003-03-19
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of existing inorganic antibacterial agents such as poor whiteness, easy darkening of color, poor antibacterial stability, and difficulty in maintaining long-term stable antibacterial properties, and provide a high-whiteness, slow-release type with long-term antibacterial ability. Inorganic nano antibacterial agent and preparation method thereof

Method used

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  • Delay-released inorganic nano antiseptic with high whiteness and its prepn
  • Delay-released inorganic nano antiseptic with high whiteness and its prepn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Accurately weigh 1.58g (NH 4 ) 2 HPO 4 , dissolved in deionized water, placed in a 1000ml beaker, adjusted to pH 12.0 with ammonia water, and the final solution volume was 300ml; this was reaction solution 1.

[0028] (2) Accurately weigh 4.72g Ca(NO 3 ) 2 .4H 2 O, and 0.12g AgNO 3 , dissolved in 50ml of water. This is reaction solution 2.

[0029] (3) Slowly add the reaction solution 2 dropwise to the reaction solution 1 in a water bath at 99°C with constant stirring, stir for 0.5 hours, keep the temperature for 4 hours, and age for 24 hours.

[0030] (4) Rinse the precipitate with water until the filtrate is neutral and there is no Ag in the filtrate + until.

[0031] (5) Dry the precipitate at 105°C. After grinding, it is calcined at 1200°C for 2 hours, and the obtained powder is ground to obtain inorganic

[0032] Antibacterial agents.

[0033] The prepared inorganic antibacterial agent is Ca loaded with silver ions 10 (PO 4 ) 6 (OH) 2 , antib...

Embodiment 2

[0035] (1) Accurately weigh 1.58g (NH 4 ) 2 HPO 4 , dissolved in deionized water, placed in a 1000ml beaker, adjusted to pH 12.0 with ammonia water, and the final solution volume was 300ml; this was reaction solution 1.

[0036] (2) Accurately weigh 4.72g Ca(NO 3 ) 2 .4H 2 O, 0.16gCu(NO 3 ) 2 and 0.16gZn(NO 3 ) 2 , dissolved in 50ml of water and stirred evenly. This is reaction solution 2.

[0037] (3) Slowly add the reaction solution 2 dropwise to the reaction solution 1 in a water bath at 99°C with constant stirring, stir for 0.5 hours, keep the temperature for 4 hours, and age for 24 hours.

[0038] (4) Rinse the precipitate with water until the filtrate is neutral and there is no Cu in the filtrate 2+ and Zn 2+ until.

[0039] (5) Dry the precipitate at 105°C. After grinding, it is calcined at 1000°C for 2 hours, and the obtained powder is ground to obtain an inorganic antibacterial agent.

[0040] The prepared inorganic antibacterial agent is Ca loaded with...

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Abstract

The antiseptic has nano level hydroxyapatite as carrier and added antiseptic metal salt accounting for 1-8 wt%. The crystal is granular and the antiseptic metal ions enter to the crystal lattice of hydroxyapatite. The preparation process includes the steps of dropping calcium nitrate solution into phosphate solution of pH value of 11-12 for reaction to produce hydroxyapatite, washing with water and deposition, stoving, crushing, high-temperature calcination, superfine crushing, etc. The product has high whiteness, fine grain size and delay released antiseptic effect. It may be used as the functional additive for fiber product, plastic, white household appliance, antiseptic building material, water treating agent, ship protecting agent, etc.

Description

technical field [0001] The invention relates to a high-whiteness, slow-release inorganic nano-antibacterial agent and a preparation method thereof. Background technique [0002] As an important topic closely related to human health, the research and application of antibacterial technology has been paid more and more attention by relevant government departments, scientific research institutions and business circles. Inorganic antibacterial agents have broad application prospects in the processing fields of fibers, plastics, ceramics, coatings and other products because of their safety, heat resistance, durability and persistence. [0003] However, there are still many problems to be solved urgently in the research and application of inorganic antibacterial agents: first, Ag + It is the inorganic antibacterial ion with the strongest antibacterial ability, and the application of silver-based inorganic antibacterial agents is the most extensive. But Ag + Not stable enough, it...

Claims

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Application Information

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IPC IPC(8): A01N59/26
Inventor 袁鹏何宏平
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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