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Antibacterial nano-silver composite polyurethane material and preparation method thereof

A composite polyurethane and nano-silver technology, which is applied in the field of food antibacterial packaging, can solve the problems of harmfulness to the human body, poor thermal stability, and poor durability, and achieve the effects of saving raw materials, facilitating operation, and simplifying operations

Inactive Publication Date: 2010-06-30
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of antibacterial agent has poor thermal stability (can only be used below 300 ° C), is easy to decompose, has poor persistence, and is usually more toxic, and is harmful to the human body if used for a long time; the advantage of inorganic antibacterial agents is that they have low toxicity, Heat resistance, durability, persistence, broad antibacterial spectrum, etc., are the most suitable antibacterial agents for daily products such as fibers, plastics, and building materials

Method used

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  • Antibacterial nano-silver composite polyurethane material and preparation method thereof
  • Antibacterial nano-silver composite polyurethane material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: add 22mL concentration and be the N of 11% polyurethane in the there-necked flask, N-dimethylformamide-tetrahydrofuran (volume ratio is 4: 1) solution, slowly add 0.5% silver nitrate (relative to In polyurethane) N,N-dimethylformamide solution 4mL. Stir at room temperature for 0.5-1 hour. Gradually raise the temperature to 70°C, and continue to stir for 16 hours, and a golden yellow silver sol is seen to be formed. After the reaction solution is cooled, let it stand for 24 hours, bottle it and seal it or spin it into fibers. Wherein the silver nanoparticles have an average diameter of 10-100nm. ( figure 1 (UV-Vis absorption diagram)

Embodiment 2

[0023] Example 2: Take 20 mL of polyurethane N, N-dimethylformamide solution with a concentration of 8%, slowly add 0.5% silver nitrate (relative to polyurethane) N, N-dimethylformamide solution 3 mL under stirring. Stir at room temperature for 0.5-1 hour. Gradually raise the temperature to 60°C, and continue to stir for 16 hours, and a golden yellow silver sol is seen to be formed. After the reaction solution is cooled, let it stand for 24 hours, bottle it and seal it or spin it into fibers. Wherein the silver nanoparticles have an average diameter of 10-100nm.

example 3

[0024] Example 3: Take 21.75 mL of 5% polyurethane N,N-dimethylformamide solution, slowly add 0.05% silver nitrate (relative to polyurethane) N,N-dimethylformamide solution 1 mL under stirring. Stir at room temperature for 0.5-1 hour. Gradually raise the temperature to 60°C, and continue to stir for 16 hours, and a golden yellow silver sol is seen to be formed. After the reaction solution is cooled, let it stand for 24 hours, bottle it and seal it or spin it into fibers. Wherein the silver nanoparticles have an average diameter of 10-100nm. ( figure 2 for transmission electron microscope)

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Abstract

The invention discloses an antibacterial nano-silver composite polyurethane material and a preparation method thereof. The silver salt solutions with different concentrations are slowly added in polyurethane stock solutions with different concentrations at the normal temperature, then stirred for 0.5-1 hour to gradually rise to the preset temperature, and then continuously stirred for 2-16 hours until full reaction, so as to obtain golden yellow nano-silver polyurethane solution; the reaction liquid stands after being cooled to obtain the antibacterial nano-silver composite polyurethane material, and then the antibacterial nano-silver composite polyurethane material is bottled in a sealed manner and can be used for spinning or film making; in the provided antibacterial nano-silver composite polyurethane material, the nano-sliver is regularly spherical, the grain size distribution is narrow, the dispersion is uniform, and the weight percent is 0.01 percent to 5.0 percent; and other reducing agents are not required to be added under the nonaqueous solution, the silver ions can be reduced into silver nanoparticles, therefore, the operation is simple, and the antibacterial nano-silver composite polyurethane material and the preparation method thereof are suitable for popularization and application.

Description

(1) Technical field: [0001] The invention relates to an antibacterial nano-silver composite polyurethane material and a preparation method thereof, which is an antibacterial composite material that can be further spun into nano-silver composite polyurethane fiber and prepared nano-silver composite polyurethane film, and belongs to the field of medical materials and textile materials , food antibacterial packaging and other technical fields. (two) background technology: [0002] Polyurethane is increasingly favored by the market for its advantages such as wide range of softness and hardness adjustable, low temperature resistance, solvent resistance, and high elasticity. It has been widely used in light industry, home appliances, textiles, and medical and health fields. However, in the actual application and storage process of polyurethane materials, bacteria are very easy to grow and reproduce under suitable temperature and humidity conditions, which seriously threatens human...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L75/06C08L75/08C08K7/18C08K3/08D01F6/70D01F1/10
Inventor 曲荣君高静静马千里孙昌梅王春华张盈
Owner LUDONG UNIVERSITY
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