Method for preparing shell-loaded nano-silver composite antibacterial material with assistance of microwaves

A composite antibacterial and microwave-assisted technology, which is applied in the field of microwave-assisted synthesis of shell-loaded nano-silver composite antibacterial materials, can solve the problems of long reaction time, large synthetic particles and easy agglomeration, and achieve excellent antibacterial activity.

Inactive Publication Date: 2015-04-22
THIRD INST OF OCEANOGRAPHY STATE OCEANIC ADMINISTATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method for microwave-assisted synthesis of shell-loaded nano-silver composite antibacterial materials, which solves the problems of large synthetic particles, easy agglomeration and long reaction time in the prior art

Method used

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  • Method for preparing shell-loaded nano-silver composite antibacterial material with assistance of microwaves
  • Method for preparing shell-loaded nano-silver composite antibacterial material with assistance of microwaves

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preparation example Construction

[0018] The invention provides a preparation method for microwave-assisted synthesis of shell-loaded nano-silver composite antibacterial material, which is specifically implemented according to the following steps:

[0019] Step 1. Pretreatment of shell powder, 200-400 mesh shell powder in 0.1-0.6mol / L sodium hydroxide, sodium carbonate or potassium hydroxide alkaline solution, 15-40KHz ultrasonic treatment for 10-50min, washing with water and drying at 80-120°C to obtain pretreated shell powder;

[0020] Step 2. Add the pretreated shell powder to 0.05-0.2mol / L silver nitrate solution, and add 0-5% of the weight of the shell powder to prepare a mixed solution. The additives are polyvinylpyrrolidone, glycerin, and ethylene glycol , sodium citrate, sodium borohydride, polyacrylamide, starch, sodium carboxymethylcellulose, β-cyclodextrin, polyphthalate and polypropyleneimine, mixed solution React in a microwave synthesis instrument at 50-100°C for 50-60min, wash with deionized wa...

Embodiment 1

[0028] A preparation method for microwave-assisted synthesis of shell-loaded nano-silver composite antibacterial materials, specifically implemented according to the following steps: 200% of shell powder is treated in 0.1mol / L sodium hydroxide alkaline solution for 10min under the action of 15KHz ultrasound, washed with water and Dry at 120°C to obtain pretreated shell powder; add the pretreated shell powder to a 0.05mol / L silver nitrate solution, and add an additive accounting for 5% of the shell powder weight to prepare a mixed solution. The additive is β-cyclodextrin, The mixed solution was reacted in a microwave synthesis instrument at 100°C for 60 minutes. After the reaction was completed, it was washed three times with deionized water, filtered and dried at 65°C for 10 hours to obtain a shell-loaded nano-silver composite antibacterial material.

Embodiment 2

[0030] A preparation method for microwave-assisted synthesis of shell-loaded nano-silver composite antibacterial materials, specifically implemented according to the following steps: 400-mesh shell powder is treated in 0.6mol / L sodium carbonate alkaline solution for 50 minutes under the action of 40KHz ultrasound, washed with water and dried for 80 minutes. ℃ drying to obtain the pre-treated shell powder; add the pre-treated shell powder to 0.2mol / L silver nitrate solution, react in a microwave synthesis instrument at 50°C for 50min, wash with deionized water three times after the reaction is completed, and pump Filter and dry at 55°C for 15 hours to obtain the shell-loaded nano-silver composite antibacterial material.

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Abstract

The invention discloses a method for preparing a shell-loaded nano-silver composite antibacterial material with the assistance of microwaves. The method comprises the steps that shell powder is pretreated; the shell powder is added to a silver nitrate solution, an additive is added to prepare a mixed solution, the mixed solution reacts in the microwave synthesis instrument, after the reaction is completed, deionized water washing is conducted, suction filtration and drying are conducted, and then the shell-loaded nano-silver composite antibacterial material can be obtained. By the adoption of the method for preparing the shell-loaded nano-silver composite antibacterial material with the assistance of the microwaves, shells are pretreated through an ultrasonic technique, impurities in a porous structure of the shells are removed, and the surfaces of the shells are activated. The method for preparing the shell-loaded nano-silver composite antibacterial material with the assistance of the microwaves has the advantages of shortening reaction time, improving productivity, preparing the material which is small in particle size, narrow and even in particle size distribution and high in purity, improving the physical-chemical properties of the material and the like; the reaction temperature is lowered, the reaction time is shortened, and the defect that by the adoption of a traditional method, a synthesized material is large in particle and prone to clustering is overcome; the antibacterial performance of the composite material is improved; the technology is simple, resource utilization of the wasted shells is achieved, waste materials are recycled, and cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method for microwave-assisted synthesis of shell-loaded nano-silver composite antibacterial materials. Background technique [0002] Silver-based nanocomposite antibacterial agents have attracted much attention due to their advantages such as long-lasting antibacterial, broad-spectrum, high temperature resistance, no drug resistance, not easy to decompose, safe and hygienic, and high efficiency. Traditionally, methods such as hydrothermal synthesis, chemical reduction, solvothermal, hydrothermal synthesis, and sol-gel methods have been used. However, these techniques usually use strong acids, and the chemical reduction takes hours or even days, and the steps are cumbersome. At the same time, these methods often cannot control the particle size and shape well, and consume a lot of materials and heat energy, which is not economical and environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 刘源森林凌唐旭徐长安罗耀发林小燕
Owner THIRD INST OF OCEANOGRAPHY STATE OCEANIC ADMINISTATION
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