Method for preparing antibacterial composite material with nano silver particles evenly dispersed in polymeric matrix

A technology of nano-silver particles and composite materials, which is applied in the field of preparation of nano-silver/polymer composite materials, can solve the problems of complex preparation process, strong agglomeration of nano-silver particles, and inability to uniformly disperse silver particles, and achieves a simple and wide-ranging preparation process. spectrum bactericidal effect

Inactive Publication Date: 2009-09-30
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The shortcomings of the above technologies are: (1) the preparation process is more complicated; (2) the extremely strong agglomeration of nano-silver particles leads to the fact that the silver particles cannot be evenly dispersed in the polymer with nanometer size
[0008] Regarding the preparation of a microemulsion con

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Dissolve sodium lauryl sulfate in the styrene / methyl methacrylate monomer that has been mixed uniformly at a volume ratio of 1:1 to prepare a mixed monomer solution with a mass concentration of sodium lauryl sulfate of 130 g / L ,stand-by.

[0030] Take 20 mL of the above mixed monomer solution, add 1.5 mL of silver nitrate aqueous solution with a concentration of 0.1 mol / L, and 4 mL of isopropanol, and stir for 30 minutes to obtain a clear and transparent microemulsion containing silver nitrate.

[0031] Another 10 mL of the mixed monomer solution was added with 1.5 mL of trisodium citrate aqueous solution with a concentration of 0.3 mol / L and 3 mL of isopropanol, and stirred for 30 minutes to obtain a clear and transparent microemulsion containing trisodium citrate.

[0032] Then, at a constant temperature of 30° C. under stirring conditions, the above-mentioned trisodium citrate microemulsion was slowly dropped into the silver nitrate microemulsion for 0.5 h, and the sti...

Embodiment 2

[0038] Dissolve sodium lauryl sulfate in the styrene / methyl methacrylate monomer that has been mixed uniformly at a volume ratio of 1:1 to prepare a mixed monomer solution with a mass concentration of sodium lauryl sulfate of 150 g / L ,stand-by.

[0039] Take 20 mL of the above mixed monomer solution, add 1.5 mL of silver nitrate aqueous solution with a concentration of 0.2 mol / L, and 4 mL of isopropanol, and stir for 30 minutes to obtain a clear and transparent microemulsion containing silver nitrate.

[0040] Another 10 mL of the mixed monomer solution was added with 1.5 mL of trisodium citrate aqueous solution with a concentration of 0.4 mol / L, 3 mL of isopropanol, and stirred for 30 minutes to obtain a clear and transparent microemulsion containing trisodium citrate.

[0041] At a constant temperature of 30° C. under stirring conditions, slowly drop the above-mentioned trisodium citrate microemulsion into the silver nitrate microemulsion for 1.0 h, and continue stirring for...

Embodiment 3

[0046] Dissolve sodium lauryl sulfate in the styrene / methyl methacrylate monomer that has been mixed uniformly at a volume ratio of 1:1 to prepare a mixed monomer solution with a mass concentration of sodium lauryl sulfate of 130 g / L ,stand-by.

[0047] Take 20 mL of the above mixed monomer solution, add 1.5 mL of silver nitrate aqueous solution with a concentration of 0.1 mol / L, and 4 mL of isopropanol, and stir for 30 minutes to obtain a clear and transparent microemulsion containing silver nitrate.

[0048] Take another 10 mL of the above mixed monomer solution, add 1.5 mL of trisodium citrate aqueous solution with a concentration of 0.2 mol / L, and 3 mL of isopropanol, and stir for 30 minutes to obtain a clear and transparent microemulsion containing trisodium citrate.

[0049] At a constant temperature of 45° C. under stirring conditions, the above-mentioned trisodium citrate microemulsion was slowly dropped into the silver nitrate microemulsion for 0.5 h, and the stirring...

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Abstract

The invention discloses a method for preparing an antibacterial composite material with nano-silver particles evenly dispersed in a polymeric matrix, which belongs to technique for preparing antibacterial nano composite materials and comprises the following steps: preparing styrene/methyl methacrylate hybrid monomers, a sodium dodecyl sulfate hybrid monomer solution, a silver nitrate aqueous solution and a trisodium citrate aqueous solution; mixing the silver nitrate aqueous solution and the trisodium citrate aqueous solution with the sodium dodecyl sulfate hybrid monomer solution according to a volume ratio to obtain a micro-emulsion containing silver nitrate and a micro-emulsion containing trisodium citrate; stirring and mixing the two micro-emulsions to obtain a stable micro-emulsion having hybrid monomers of continuous phases and containing the nano-silver particles; and then dispersing the emulsions in distilled water to prepare a common emulsion, introducing nitrogen for deoxidization, adding an initiator to perform emulsion polymerization reaction, using sodium chloride to perform emulsion-breaking and separation on the product, fully washing the product with deionized water, and soaking the product in ethanol, and drying the product to constant weight so as to obtain the antimicrobial nano-silver/poly(styrene-methyl methacrylate) composite material. The method has simple preparation processes and can make the nano-silver particles evenly dispersed in the polymer matrix, and the prepared composite material has broad-spectrum bactericidal property, and has high fatality rate to Escherichia coli, bacillus subtilis, staphylococcus aureus and pseudomonas aeruginosa in 24 hours.

Description

technical field [0001] The invention belongs to the technical field of preparation of antibacterial nano composite materials, in particular to a preparation method of nano silver / poly(styrene-methyl methacrylate) composite materials in which antibacterial nano silver particles are uniformly dispersed in a polymer matrix. Background technique [0002] Silver ions and nano-silver particles, as inorganic antibacterial agents, have a good inhibitory effect on fungi and bacteria, and have many advantages such as high efficiency, long-lasting and broad-spectrum, but their chemical properties are active, and they are easily transformed into brown silver oxide, which affects the antibacterial performance. Combining nano-silver particles with polymers can prepare antibacterial polymer materials, which can not only retain the main properties of silver particles and polymer matrix, but also obtain functions that the original components do not have through the composite effect. [0003...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F220/18C08F2/44C08K3/08
Inventor 罗青枝王德松安静李雪艳李敏娜
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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