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A kind of preparation method of nano silver/cellulose composite antibacterial material

A composite antibacterial and cellulose technology, applied in the field of antibacterial materials, can solve the problems of toxic cost of external reducing agent, reduction of antibacterial performance by nano-silver, complicated preparation steps, etc., and achieve the effect of easy industrialization, not easy to self-aggregate, and simple process

Active Publication Date: 2022-03-08
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In general, there are problems such as toxic and high cost of external reducing agent, high cost of raw materials, long reaction time, complicated preparation steps, self-aggregation of nano-silver will reduce antibacterial performance, etc.
Therefore, it is a great challenge to synthesize nanosilver-cellulose composites with excellent antibacterial properties in a green, efficient and low-cost method.

Method used

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  • A kind of preparation method of nano silver/cellulose composite antibacterial material
  • A kind of preparation method of nano silver/cellulose composite antibacterial material

Examples

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Effect test

Embodiment 1

[0027] A preparation method of nano silver / cellulose composite antibacterial material, comprising the following steps:

[0028] Step one, at -12 ℃, cellulose is dissolved in the mixed solution of sodium hydroxide and urea, and preparation mass percentage is the cellulose solution of 3wt%, and the mixed solution of sodium hydroxide and urea comprises the following mass percentages: Hydroxide Sodium 7wt%, urea 12t%, the rest is water;

[0029] Step 2, adding silver nitrate solution to the cellulose solution obtained in step 1, the mass ratio of silver nitrate and cellulose is 0.01:1, and put into the microwave reactor quickly after stirring;

[0030] Step 3, setting the temperature of the microwave reactor to 50°C and the time to 20 minutes;

[0031] Step 4: Rinse the nano silver / cellulose composite obtained in step 3 with hot water at a temperature of 65° C. until the washing solution is neutral, to obtain a nano silver / cellulose composite material.

[0032] figure 1 It is a...

Embodiment 2

[0053] A preparation method of nano silver / cellulose composite antibacterial material, comprising the following steps:

[0054] Step 1, dissolving cellulose in a mixed solution of sodium hydroxide and urea at -12°C, preparing a cellulose solution with a mass percentage of 0.5 wt%, and a mixed solution of sodium hydroxide and urea comprising the following mass percentages: hydrogen Sodium oxide 7wt%, urea 12wt%, the rest is water;

[0055] Step 2, adding silver nitrate solution to the cellulose solution obtained in step 1, the mass ratio of silver nitrate and cellulose is 0.01:1, and put into the microwave reactor quickly after stirring;

[0056] Step 3, setting the temperature of the microwave reactor to 40°C and the time to 20 minutes;

[0057] Step 4, the nano-silver / cellulose composite obtained in step 3 is washed with hot water at 50° C. until the washing solution is neutral to obtain a nano-silver / cellulose composite material. The diameter of the obtained silver nanopart...

Embodiment 3

[0059] A preparation method of nano silver / cellulose composite antibacterial material, comprising the following steps:

[0060] Step one, at -12 ℃, cellulose is dissolved in the mixed solution of sodium hydroxide and urea, and preparation mass percentage is the cellulose solution of 4wt%, and the mixed solution of sodium hydroxide and urea comprises the following mass percentage material: Hydroxide Sodium 7wt%, urea 12wt%, the rest is water;

[0061] Step 2, adding silver nitrate solution to the cellulose solution obtained in step 1, the mass ratio of silver nitrate to cellulose is 0.05:1, and put into the microwave reactor quickly after stirring;

[0062] Step 3, setting the temperature of the microwave reactor to 80°C and the time to 60 minutes;

[0063] Step 4, the nano-silver / cellulose composite obtained in step 3 is rinsed with hot water at 80° C. until the washing solution is neutral to obtain a nano-silver / cellulose composite material. The diameter of the obtained silv...

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Abstract

The invention discloses a preparation method of a nano-silver / cellulose composite antibacterial material, which comprises the following steps: step 1, dissolving cellulose in a mixed solution of sodium hydroxide and urea to prepare a cellulose solution; step 2, preparing a cellulose solution to step 1 Add silver nitrate solution to the obtained cellulose solution, stir it evenly and quickly put it into the microwave reactor; step 3, set the temperature of the microwave reactor to 40-80°C, and the time is 20-60min; step 4, obtain the The nano-silver / cellulose composite is washed with hot water until the washing liquid is neutral to obtain the nano-silver / cellulose composite. The present invention reduces silver ions to silver nanoparticles through the oxidation reaction of hydroxyl groups on the surface of cellulose to obtain nano-silver / cellulose composite materials without adding additional reducing agents to avoid environmental pollution; high efficiency and energy saving, excellent antibacterial performance, simple process, and low cost of raw materials The cost is low, the reaction time is short, and it is convenient for industrial promotion.

Description

technical field [0001] The invention relates to a preparation method of an antibacterial material, in particular to a preparation method of a nano silver / cellulose composite antibacterial material. Background technique [0002] Silver nanoparticles play a leading role in the preparation and research of antibacterial materials at present. Compared with organic antibacterial agents and natural antibacterial agents, silver nanoparticles have the advantages of high antibacterial activity, heat resistance, durability and safety. Silver nanoparticles have excellent inhibitory properties against various microorganisms, and at the same time, they will not be metabolized by bacteria, nor will they cause microorganisms to develop drug resistance, so they show a sustained antibacterial effect. However, due to the self-aggregation of silver nanoparticles, the specific surface area will be reduced, and the probability of contact between silver nanoparticles and the surface of microorgani...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08K3/08A01N59/16A01P1/00B22F9/24B82Y40/00
CPCC08K3/08A01N59/16B22F9/24B82Y40/00C08K2201/011C08K2003/0806C08L1/02
Inventor 张东阳杨佳昕姚晓慧陈涛赵卫国张笑綦胡润泽
Owner JIANGSU UNIV OF SCI & TECH
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