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Environment-friendly silver-loaded antibacterial agent based on plant waste powder and preparation method of environment-friendly silver-loaded antibacterial agent

A technology of plant waste and antibacterial agent, which is applied in the field of environment-friendly silver-loaded antibacterial agent and its preparation, can solve the problems of weak interaction between nano-silver and substrate, high risk of environmental pollution, complex process and reagents, etc. The effect of low cost and uniform load

Active Publication Date: 2020-11-24
石家庄元鼎新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of high cost, easy agglomeration and easy dissolution of silver ions in the current nano-silver antibacterial agent, it also overcomes the weak interaction between nano-silver and the substrate, complex process and reagents in the existing preparation technology of silver-loaded antibacterial agent (especially the need for additional reducing agent) , Substrate preparation is complicated and the risk of environmental pollution is high, the present invention provides a silver-loaded antibacterial agent based on plant waste powder and its preparation method

Method used

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  • Environment-friendly silver-loaded antibacterial agent based on plant waste powder and preparation method of environment-friendly silver-loaded antibacterial agent
  • Environment-friendly silver-loaded antibacterial agent based on plant waste powder and preparation method of environment-friendly silver-loaded antibacterial agent
  • Environment-friendly silver-loaded antibacterial agent based on plant waste powder and preparation method of environment-friendly silver-loaded antibacterial agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Plant waste (bamboo wood) was pulverized and ground into powder to obtain 200-mesh plant waste powder. In parts by weight, 27 parts of silver nitrate were dissolved in water, followed by adding 63 parts of plant waste powder (bamboo wood powder) and 10 parts of γ-aminopropyltriethoxysilane, and after uniform stirring, absorb in the dark for 100 minutes. Then place it in a 90°C oven and dry it for 24h to obtain a silver-loaded antibacterial agent based on plant waste powder, as shown in the scanning electron micrograph figure 1 As shown in b, the EDS spectrum is as figure 2 As shown, the XRD pattern is as image 3 shown. The results show that the nano-silver is uniformly dispersed on the plant waste powder, the average particle size of the nano-silver is about 14.0nm, and the interface between the nano-silver and the substrate is fuzzy, and the interaction between the two is strong. The antibacterial rates of the prepared silver-loaded antibacterial agent against Esc...

Embodiment 2

[0036] The plant waste (coconut husk) was pulverized and ground into powder to obtain a 100-mesh plant waste powder. In parts by weight, dissolve 5 parts of silver acetate in water, add 90 parts of plant waste powder (coconut shell powder) and 5 parts of γ-glycidyl ether oxypropyltrimethoxysilane in turn, stir evenly and avoid light for adsorption 10 min, and then placed in an oven at 60° C. for 36 h to obtain a silver-loaded antibacterial agent based on plant waste powder, whose scanning electron microscope pattern, EDS pattern and XRD pattern are similar to those of Example 1.

[0037] After testing, the nano-silver is uniformly dispersed on the plant waste powder, and the average particle size of the nano-silver is about 16.8nm. The antibacterial rates of the prepared silver-loaded antibacterial agent against Escherichia coli and Staphylococcus aureus were 97% and 94% respectively (the antibacterial performance test standard is GB / T 21510-2008).

Embodiment 3

[0039] The plant waste (wheat straw) was pulverized and ground into powder to obtain a 40-mesh plant waste powder. In parts by weight, 37 parts of silver nitrate and 3 parts of silver acetate were dissolved in water, followed by adding 59 parts of plant waste powder (wheat straw powder) and 1 part of γ-methacryloxypropyltrimethoxysilane , after uniform stirring, absorb in the dark for 200min, and then place it in a 120°C oven and dry for 10h to obtain a silver-loaded antibacterial agent based on plant waste powder. The scanning electron microscope, EDS and XRD patterns are similar to those in Example 1.

[0040] After testing, the nano-silver is uniformly dispersed on the plant waste powder, and the average particle diameter of the nano-silver is about 18.3nm. The antibacterial rate of the obtained antibacterial agent against Escherichia coli and Staphylococcus aureus is 100% (the antibacterial performance test standard is GB / T21510-2008).

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Abstract

The invention relates to an environment-friendly silver-loaded antibacterial agent based on plant waste powder and a preparation method of the environment-friendly silver-loaded antibacterial agent. The preparation method comprises the following steps of adding the plant waste powder, silver salt and a silane coupling agent according to a certain ratio, performing uniform mixing, and controlling the reaction temperature and time to obtain the environment-friendly silver-loaded antibacterial agent. Silver ions are uniformly adsorbed under the action of porous structures by utilizing reducing groups and the porous structures which are rich in plant wastes, nano-silver grows through in-situ reduction under the action of the reducing groups, and meanwhile, the nano-silver is uniformly anchoredinside and on the surfaces of plant tissues by virtue of the porous structures, so that preparation of the silver-loaded antibacterial agent is realized in one step in a drying process of the plant waste powder. The preparation method solves the problems of high cost, easy agglomeration, easy dissolution of silver ions and weak interaction with a high polymer material for the nano-silver; the plant waste powder is taken as a substrate, is environment-friendly, easy to obtain and low in cost, and conforms to the concept of sustainable development; the preparation process is simple; and extra use of special equipment and reagent, especially a reducing agent is avoided.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic nanomaterials, in particular to an antibacterial agent and a preparation method thereof, in particular to an environment-friendly silver-loaded antibacterial agent based on plant waste powder and a preparation method thereof. Background technique [0002] With the improvement of people's health and safety awareness and needs, materials with antibacterial function have attracted more and more attention. Giving a material antimicrobial properties can in some ways increase its durability and extend its lifespan. In addition, the high-efficiency antibacterial performance can also meet the functional requirements of health and harmlessness, and broaden the application fields of materials. Therefore, the development of antibacterial agents has become a new industry. There are many kinds of antibacterial agents, which can be divided into two categories: inorganic antibacterial agents a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/12C08K3/08C08K9/06C08L101/00
CPCC08K9/12C08K3/08C08K9/06C08L101/00C08K2003/0806C08K2201/011
Inventor 王昱程戚嵘嵘钱雪峰宰建陶罗超
Owner 石家庄元鼎新材料有限公司
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