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Inorganic anti-bacterium mildewproof additive, preparation method and application thereof

An inorganic antibacterial and additive technology, applied in the fields of botanical equipment and methods, fungicides, applications, etc., can solve the problems of application field limitation, easy oxidative discoloration, product discoloration, etc. discoloration effect

Inactive Publication Date: 2009-08-26
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the montmorillonite or vermiculite powder containing silver ions is severely hardened after drying. When it is added to a matrix such as plastics, it has poor binding ability with the matrix and poor dispersion, which will greatly affect the performance of the product. The ion is not stable enough, and it is easy to separate out in large quantities, so that the antibacterial effect of the product is not good; in "New Plastic Material Process Formula" (volume 1), Beijing: China Light Industry Press, 2000
The author Deng Shunyang pointed out that after the precipitation of silver ions, it is easy to oxidize and discolor, which will cause serious discoloration of plastics and other products, and the application field is greatly limited. Therefore, current research is devoted to improving the discoloration of antibacterial agents.
At the same time, the binding ability of antibacterial additives to substrates such as plastics needs to be further improved.

Method used

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  • Inorganic anti-bacterium mildewproof additive, preparation method and application thereof
  • Inorganic anti-bacterium mildewproof additive, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Take 10kg of montmorillonite with a particle size of 200 mesh, add 25kg of water and stir evenly together with 2kg of NaCl to make a suspension slurry, and react for 12 hours at 40°C under stirring conditions;

[0035] (2) After centrifugation or filtration and dehydration, wash with water for 3 to 5 times to remove Cl ions in the montmorillonite, add 90kg of water and stir evenly to make a suspension slurry, and add 0.5kg of AgNO 3 , reacted at 40°C for 3 hours under stirring conditions;

[0036] (3) After centrifugation or filtration dehydration, wash with water 3 to 5 times to remove Ag ions on the surface of montmorillonite, add 40kg of water and stir evenly to make a suspension slurry, add 1kg of dodecyltrimethylammonium bromide , reacted at 60°C for 12 hours under stirring conditions;

[0037] (4) After centrifugation or filtration and dehydration, wash 3 to 5 times, place the obtained montmorillonite in a vacuum oven at 80°C to dry out the moisture, and the ...

Embodiment 2

[0041] (1) Weigh 10kg of vermiculite with a particle size of 200 mesh, together with 3kg of NaNO 3 , add 40kg of water and stir evenly to make a suspension slurry, and react at 60°C for 16 hours under stirring conditions;

[0042] (2) After centrifugation or filtration dehydration, wash with water for 3 to 5 times to remove Cl ions in the vermiculite, add 70kg of water and stir evenly to make a suspension slurry, add 1kg of AgNO 3 , reacted at 60°C for 4 hours under stirring conditions;

[0043] (3) After centrifugation or filtration dehydration, wash with water 3 to 5 times to remove Ag ions on the surface of the vermiculite, add 25kg of water and stir evenly to make a suspension slurry, add 4kg of tetradecyltrimethylammonium chloride, React at 70°C for 16 hours under stirring conditions;

[0044] (4) After centrifugation or filtration and dehydration, wash 3 to 5 times, place the obtained vermiculite in a vacuum oven at a temperature of 80°C to dry off the water, and the r...

Embodiment 3

[0048] (1) Weighing 10kg of montmorillonite with a particle size of 200, together with 4kg of Na 2 CO 3 , add 70kg of water and stir evenly to make a suspension slurry, and react at 80°C for 20 hours under stirring conditions;

[0049] (2) After centrifugation or filtration dehydration, wash with water 3 to 5 times to remove the Cl ions in the montmorillonite, add 40kg of water and stir evenly to make a suspension slurry, add 1.2kg of AgNO 3 , reacted at 70°C for 5 hours under stirring conditions;

[0050] (3) After centrifugation or filtration and dehydration, wash with water 3 to 5 times to remove Ag ions on the surface of montmorillonite, add 90kg of water and stir evenly to make a suspension slurry, add 8kg of cetyltrimethylammonium bromide , reacted at 80°C for 20 hours under stirring conditions;

[0051] (4) After centrifugation or filtration and dehydration, wash 3 to 5 times, put the obtained montmorillonite in a vacuum oven at a temperature of 80 ° C to dry out the...

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Abstract

The invention discloses an inorganic anti-bacterium mildewproof additive, a preparation method and application thereof. The additive is mineral powder containing Ag element and long chain alkyl ammonium salts, and is characterized in that the mineral powder is turface or vermiculite power, and, by weight percentage, comprises 1.5 to 7.0 percent of the Ag element in the mineral powder, and 5 to 30 percent of the long chain alkyl ammonium salts in the mineral powder. The preparation method comprises the following steps: carrying out sodium treatment on the mineral powder; adsorbing Ag ions among laminations of the mineral powder; introducing the long chain alkyl ammonium salts into the laminations of the mineral power carrying Ag; carrying out organic intercalation treatment on the turface or the vermiculite carrying Ag by amphipathy performance of the long chain alkyl ammonium salts. Compared with inorganic antibacterial agents carrying Ag independently and supported by the long chain alkyl ammonium salt columns independently, when the turface or the vermiculite powder with anti-bacterium function is applied to plastic and other base materials, the product can not be easily discolored, has long-term inhabitation on bacteria and fungus, greatly reduces cost, and widening the application field.

Description

Technical field: [0001] The invention relates to an antibacterial and antimildew additive, in particular to an inorganic antibacterial and antimildew additive used in products such as fibers, plastics, paints and coatings, as well as its preparation method and application. Background technique: [0002] Layered silicate minerals such as montmorillonite or vermiculite have a 2:1 structural unit layer in the crystal structure. The layered structure can expand when heated, and has strong adsorption and cation exchange capabilities. By introducing silver ions into the interlayers of montmorillonite or vermiculite through cation exchange reaction, the montmorillonite or vermiculite with antibacterial effect on bacteria and mold can be obtained. The inorganic antibacterial agent has the advantages of broad antibacterial spectrum, high safety, and no volatilization, so it can be widely used in products such as fibers, plastics, paints, and coatings. [0003] However, the montmoril...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N61/00A01N59/16A01N33/12A01P3/00C08K13/02
Inventor 朱诚身何素芹陈志坤刘文涛吴刘锁
Owner ZHENGZHOU UNIV
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