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A kind of porous copper powder carrier-loaded silver-based antibacterial material and preparation method thereof

A carrier-loaded, antibacterial material technology, applied in the field of antibacterial materials, can solve the problems of easy collapse and shrinkage of the structure, unsuitable for industrialization, and limited antibacterial effect, etc., to achieve pore structure that is not easy to collapse, strong controllability of size, and source of raw materials broad effect

Active Publication Date: 2021-06-29
CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The pore size of the existing commercially available porous copper powder is limited, and the physical loading method is difficult to load antibacterial particles in the pores, which affects the loading effect, and the price of ultrafine powder raw materials is high and uneconomical
The structure of some existing products is easy to collapse and shrink, which cannot meet the requirements of loading antibacterial particles, cannot realize the effective loading of antibacterial materials, and loses its practicability; some carriers themselves do not have antibacterial properties, which limits the antibacterial effect. Suitable for industrialization; some products prepare porous copper powder by mechanically mixing copper powder and aluminum powder and dealloying with alkaline solution
However, the addition of grinding aids will affect the purity of copper powder, and dealloying in alkaline solution will easily corrode copper powder, so it is not suitable for use as an antibacterial material carrier

Method used

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  • A kind of porous copper powder carrier-loaded silver-based antibacterial material and preparation method thereof
  • A kind of porous copper powder carrier-loaded silver-based antibacterial material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 1) Filter 500ml of sugarcane juice with a 180-mesh filter cloth, control the pH to 3 with dilute hydrochloric acid; hydrolyze at 40°C for 3 hours, at a voltage of 10V, and a current density of 0.04A / cm 2 Remove impurities in the electrolytic cell for 8 hours, dilute and control the vitamin C content to 0.01 μg / 100g (measured by a fluorescence spectrophotometer), then filter through a microfiltration ceramic membrane with a membrane pore size of 50nm for 20 hours, dissolve in 1000ml methanol and stir evenly to obtain a mixed solution A ;

[0067] 2) Add 400 g of 0.1 mol / L copper salt solution, add 8 g of PVP, stir evenly, heat to 50 ° C, and adjust the pH to 9 with ammonia water to obtain the mixed solution B;

[0068] 3) Add diethylene glycol monomethyl ether to mixed solution A and mixed solution B under a 650W ultrasonic field, according to the volume ratio of mixed solution A, mixed solution B and diethylene glycol monomethyl ether 3.2:5.8:0.8 Mix and stir for 1 min...

Embodiment 2

[0074] 1) Filter 500ml of sugarcane juice with a 200-mesh filter cloth, control the pH to 4 with dilute hydrochloric acid; hydrolyze at 45°C for 2.5 hours, at a voltage of 11V, and a current density of 0.05A / cm 2 Remove impurities in the electrolytic cell for 7 hours, dilute and control the vitamin C content to 0.5 μg / 100g (measured by a fluorescence spectrophotometer), then filter through a microfiltration ceramic membrane with a membrane pore size of 50nm for 22 hours, dissolve in 1000ml methanol and stir evenly to obtain a mixed solution A ;

[0075] 2) Add 450 g of 0.07 mol / L copper salt solution, add 11 g of PVP, stir evenly, heat to 55°C, adjust the pH to 8 with ammonia water to obtain the mixed solution B;

[0076] 3) Add diethylene glycol monomethyl ether to mixed solution A and mixed solution B under a 700W ultrasonic field, according to the volume ratio of mixed solution A, mixed solution B and diethylene glycol monomethyl ether 3:6:1 Mix and stir for 1 minute to ob...

Embodiment 3

[0082] 1) Filter 500ml of sugarcane juice with a 220-mesh filter cloth, control the pH to 5 with dilute hydrochloric acid; hydrolyze at 55°C for 2 hours, at a voltage of 12V, and a current density of 0.06A / cm 2 Remove impurities in the electrolytic cell for 6 hours, dilute and control the vitamin C content to 1 μg / 100g (measured by a fluorescence spectrophotometer), then filter through a microfiltration ceramic membrane with a membrane pore size of 50nm for 24 hours, dissolve in 1000ml methanol and stir evenly to obtain a mixed solution A;

[0083] 2) Add 500 g of 0.05 mol / L copper salt solution, add 14 g of PVP, stir evenly, heat to 60°C, adjust pH to 8 with ammonia water to obtain mixed solution B;

[0084] 3) Add diethylene glycol monomethyl ether to mixed solution A and mixed solution B under an 850W ultrasonic field, according to the volume ratio of mixed solution A, mixed solution B and diethylene glycol monomethyl ether 2.8:6.2:1.2 Mix and stir for 1 minute to obtain 80...

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Abstract

The invention discloses a silver-based antibacterial material loaded on a porous copper powder carrier and a preparation method thereof, belonging to the technical field of the antibacterial material field. Including hydrolyzing sugarcane juice and dissolving in methanol to obtain mixed solution A; mixing copper salt solution and dispersant, heating, and adjusting pH to obtain mixed solution B; mixing solutions A and B for ultrasonic treatment, adding porogen to obtain mixed solution C ; Pour into the reactor for heat treatment, cool to room temperature, centrifuge and wash, and dry the porous carrier precursor; heat and keep the porous carrier precursor, and then continue to feed ammonia gas until it cools to room temperature, and the porous copper is obtained after washing and drying Powder carrier; further processed silver-based antibacterial material loaded with porous material. The invention uses biological source sugarcane juice to prepare ultra-fine porous copper powder as a carrier, and loads silver nanoparticles to prepare an antibacterial material. The material efficiently retains antibacterial and long-acting properties, and the preparation process is simple, the reaction is mild, and the equipment investment is small, which is beneficial to industrialization.

Description

technical field [0001] The invention relates to the technical field of antibacterial materials, in particular to a silver-based antibacterial material loaded on a porous copper powder carrier and a preparation method thereof. Background technique [0002] With the development of social science and technology, people's longing for a healthy life has made national health and safety awareness get great attention. The existence of microorganisms inevitably affects people's daily life. The harm of harmful bacteria is very huge. The number of people who die due to harmful microbial infections in the world is as many as tens of millions every year, which has a great impact on people's lives. Inorganic antibacterial agents such as metal ions and simple metals, due to the bactericidal properties of the metal itself, can cause the death of bacterial cells and thus have an antibacterial effect. Loading bactericidal metals on porous carriers to exert long-term bactericidal effect is a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/20A01N59/16A01N25/30A01P1/00
CPCA01N25/30A01N59/16A01N59/20
Inventor 王立惠李硕卢宗柳张小文
Owner CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD
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