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Water-insoluble nano-silver antibiotic composition and preparation thereof, master batch containing the composition and preparation thereof

A nano-silver antibacterial and water-insoluble technology, which is applied in the field of antibacterial masterbatch and its preparation, and water-insoluble nano-silver antibacterial composition, which can solve the problems of increasing the amount of silver particles, adverse effects on performance, and inability to be fully dispersed.

Inactive Publication Date: 2012-01-25
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These nano-silver will produce hard agglomerations in actual use, cannot be fully dispersed, and often exceed the nanometer level, such larger particles will have adverse effects on the performance of some products such as films or fiber products
Of course, the increase of silver particles will also lead to the increase of dosage

Method used

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  • Water-insoluble nano-silver antibiotic composition and preparation thereof, master batch containing the composition and preparation thereof
  • Water-insoluble nano-silver antibiotic composition and preparation thereof, master batch containing the composition and preparation thereof
  • Water-insoluble nano-silver antibiotic composition and preparation thereof, master batch containing the composition and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Preparation of nano silver composition:

[0105] Add 20 kilograms of bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite and 30 kilograms of N,N'-ethylene bisstearamide into the kneader, and start heating to 150°C to reduce The agent is completely melted. Add 3 kg of dispersant magnesium oleate and 12 kg of behenic acid, and stir for 10-40 minutes until the dispersant dissolves. Keep 150°C constant, add 17 kg of dioctyl phosphate monosilver, 18 kg of silver laurate, and keep stirring to dissolve the silver salt and simultaneously reduce it to form nano-silver. Then take out the material, cool to room temperature, and crush it into 1-5mm irregular particles with a plastic crusher for later use.

[0106] Preparation of PE antibacterial masterbatch:

[0107] Get 10 kilograms of the above-prepared nano-silver composition, carrier resin---190 kilograms of film-grade low-density polyethylene, and the two are put into a mixer and mixed evenly. It is co-melted extruded...

Embodiment 2

[0109] Preparation of nano silver composition:

[0110] Add 20 kg of reducing agents stearamidopropyl dimethyl tertiary amine and 20 kg of behenyl dimethyl tertiary amine into the kneader, and start heating to 140° C. to completely melt the two reducing agents. Add 7 kg of dispersant calcium linoleate and 7 kg of sebacic acid, and stir for 10-40 minutes until the dispersant dissolves. At 150° C., add 3.5 kg of silver phosphate, and keep stirring to reduce to form silver nanoparticles. Add 12 kg of filler nano-titanium dioxide and 30.5 kg of white carbon black at 150°C, and stir until fully dispersed. Then take out the material, cool to room temperature, and crush it into 1-5mm irregular particles with a plastic crusher for later use.

[0111] Preparation of polyvinyl chloride antibacterial masterbatch:

[0112] Get 40 kilograms of nano-silver composition prepared above, carrier resin---160 kilograms of soft polyvinyl chloride (through plasticizing and stabilizing in advance...

Embodiment 3

[0114] Preparation of nano silver composition:

[0115] Add reducing agent N in the kneader, 60 kilograms of N'-ethylene bis-stearamides, begin to be heated to 140 ℃, make N, N'-ethylene bis-stearamides melt completely. Add 5 kilograms of dispersant stearic acid and 3 kilograms of calcium stearate, stir until dissolving. Keep 140 ℃ constant, add 8 kilograms of silver stearate, and continue to stir, make silver stearate dissolve, reduce simultaneously and form nano-silver. Add 5 kg of filler nano-titanium dioxide at 140°C and stir until fully dispersed. Add 19 kg of shaping resin---low-density polyethylene (melt index MI between 30-50), raise the temperature to 165° C. and stir and knead until all the components are fused uniformly. Then take out the material, cool to room temperature, and crush it into 1-5mm irregular particles with a plastic crusher for later use.

[0116] Preparation of PE antibacterial masterbatch:

[0117] Get 46 kilograms of nano-silver composition pr...

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Abstract

The invention relates to a water insoluble nano silver antibacterial compound. According to weight percentage, the water insoluble nano silver antibacterial compound comprises 1 to 90 percent of water-insoluble reducer; 0.1 to 50 percent of dispersant; 1 to 20 percent of silver compound; and 0 to 70 percent of inorganic power fittings as well as 0 to 80 percent of thermoplastic forming resin. Theinvention also relates to a nano silver antibacterial master batch which comprises the water insoluble nano silver antibacterial compound and preparation methods of the water insoluble nano silver antibacterial compound and the nano silver antibacterial master batch. The nano silver antibacterial compound and the nano silver antibacterial master batch adopt the water-insoluble components which play the roles of the reducer, a solvent, the dispersant and a compatibilizer simultaneously; the nano silver compound suitable to the antibacterial master batch is formed by thermal reducing and then the antibacterial master batch is further prepared. The preparation technique of the nano silver antibacterial master batch is simple; and the obtained plastic product has excellent antibacterial performances.

Description

【Technical field】 [0001] The invention relates to the field of functional resins, in particular to a water-insoluble nano-silver antibacterial composition, a preparation method of the composition, an antibacterial masterbatch containing the composition and a preparation method thereof. 【Background technique】 [0002] In addition to the struggle for survival resources, human beings are fighting various diseases caused by pathogenic bacteria every moment. Throughout every stage of human development, the continuous improvement of human quality of life and longevity is based on the continuous improvement and deepening of human cognition of pathogenic microorganisms and prevention and control measures. Austrian physician Semmelweis pointed out that bacteria are the cause of puerperal fever in 1861. Due to his discovery, the maternal mortality rate caused by puerperal fever dropped from 18% to 2-1%. Tuberculosis, also known as tuberculosis and "white plague", has existed since th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L101/00C08K13/06C08K9/04C08J3/20C08J3/22
Inventor 代大庆张慧茹李荣先陈建军杨建
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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