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Slow-release long-acting antibacterial nanomaterial, and preparation method and application method thereof

A nanometer antibacterial material and a sustained-release technology, applied in the field of sustained-release long-acting nanometer antibacterial materials and their preparation, can solve the problems of random uncontrollability, poor long-term stability of antibacterial properties, discoloration, etc., and achieve stable and controllable release speed, Good long-term stability and enhanced antibacterial effect

Active Publication Date: 2019-01-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The present invention aims to solve the above-mentioned inorganic antibacterial agent dispersed unevenly in the carrier, the antibacterial ion release speed is too fast and random uncontrollable, the sustainable release time of sustained release is short, the long-term stability of antibacterial performance is poor, and the carrier and antibacterial ion are not compatible. Synergistic antibacterial effect, discoloration after long-term use and other problems, provide a slow-release long-acting nano-antibacterial material and its preparation and application method

Method used

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preparation example Construction

[0016] The preparation method of described antibacterial material, comprises the following steps:

[0017] 1) Synthesis of silver ion-doped bismuth tungstate nanoparticles by one-step hydrothermal method: mix 1-5mmol sodium oleate with 0.1-2mmol Bi(NO 3 ) 3 ·5H 2 O was added to deionized water, stirred for 0.2-2 hours, and then 0.01-0.2mmol AgNO 3 Added to the above mixture, magnetically stirred for 0.5-2 hours, and then 0.1-2mmol Na 2 WO 4 2H 2 O was added to the above solution, and magnetically stirred for 0.5-2 hours, and then the obtained mixed solution was added into a polytetrafluoroethylene reaction tank, and heated in water at 160-220° C. for 18-32 hours. Cool to room temperature, wash the obtained precipitate with n-hexane and ethanol for 3-6 times, and dry at 50-80° C. for 5-10 hours to obtain a silver ion-doped bismuth tungstate nanoparticle.

[0018] 2) Preparation of nano antibacterial material: the silver ion-doped bismuth tungstate nanoparticles prepared i...

Embodiment 1

[0023] 2.2mmol sodium oleate and 0.4mmol Bi(NO 3 ) 3 ·5H 2 O was added to 40ml deionized water, stirred for 0.3 hours, and then 0.01mmol AgNO 3 Added to the above mixture, stirred for 30 minutes, and then 0.4mmol Na 2 WO 4 2H 2 O was added to the above solution, stirred magnetically for 2 hours, and then the obtained mixed solution was added into a 50ml polytetrafluoroethylene reaction tank, and heated at 180°C for 18 hours. After cooling to room temperature, the obtained precipitate was washed three times with n-hexane and ethanol, and dried at 60°C for 5 hours to obtain a silver ion-doped bismuth tungstate nanoparticle.

[0024] The prepared silver ion-doped bismuth tungstate nanoparticles were mixed uniformly by mechanical ball milling for 2 hours with a mass fraction of 10% and a mass fraction of 90% water glass powder (the molar ratio of silicon oxide to sodium oxide was 0.8:1), Obtain nano antibacterial materials.

Embodiment 2

[0026] 4.4mmol sodium oleate and 0.8mmol Bi(NO 3 ) 3 ·5H 2 O was added to 40ml deionized water, stirred for 0.4 hours, and then 0.01mmol AgNO 3 Added to the above mixture, stirred for 1 hour, and then 0.8mmol Na 2 WO 4 2H 2 O was added to the above solution, stirred by magnetic force for 1 hour, and then the obtained mixed solution was added into a 50ml polytetrafluoroethylene reaction tank, and heated at 200°C for 24 hours. After cooling to room temperature, the obtained precipitate was washed 6 times with n-hexane and ethanol, dried at 70°C for 8 hours, and the powder obtained after drying was silver ion-doped bismuth tungstate nanoparticles.

[0027]The prepared silver ion-doped bismuth tungstate nanoparticles were mixed by mechanical ball milling for 1 hour with a mass fraction of 40% and a mass fraction of 60% water glass powder (the molar ratio of silicon oxide to sodium oxide was 1:1), and uniformly mixed. Obtain nano antibacterial materials.

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Abstract

The invention discloses a slow-release long-acting antibacterial nanomaterial, and a preparation method and an application method thereof. The preparation method comprises the following steps: synthesizing silver ion-doped bismuth tungstate nanoparticles by a one-step hydrothermal technology, and carrying out ball-milling blending on the silver ion-doped bismuth tungstate nanoparticles and water glass to obtain the slow-release long-acting antibacterial nanomaterial. Silver ions in the antibacterial nanomaterial are uniformly and stably dispersed in bismuth tungstate lattices, and are gradually released during use, and the strong redox ability of the electron-hole pairs of the bismuth tungstate and the silver ions generate a synergistic antibacterial effect. The slow-release long-acting antibacterial nanomaterial has good heat resistance, and achieves slow-release, long-acting, broad-spectrum and stable antibacterial, sterilizing and anti-mildew functions through high-temperature processing, heat treatment sintering or solidification treatment after being mixed with polymers, metals, glass, ceramics, coatings, paints and other different materials.

Description

technical field [0001] The invention relates to the technical field of antibacterial materials, in particular to a slow-release long-acting nano antibacterial material and a preparation method thereof. Background technique [0002] With the improvement of people's quality of modern life, people pay more and more attention to air quality and living environment, especially the indoor air quality and living environment in which they live. This includes household items such as indoor walls, glass, and sofas. They are extremely easy to absorb harmful particles such as dust, bacteria, and viruses. If such particles accumulate for a long time, they will endanger people's health. How to suppress or kill harmful particles such as bacteria and viruses on walls, glass, sofas and other household items has become an important issue related to life and health. [0003] Commonly used antibacterial materials can be classified into organic, inorganic and natural. Traditional organic antiba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00C01B33/32B82Y30/00B82Y40/00A01N25/08A01N59/16A01P3/00A01P1/00
CPCA01N25/08A01N59/16B82Y30/00B82Y40/00C01B33/32C01G41/006C01P2004/64
Inventor 储成林张昕于红光薛烽
Owner SOUTHEAST UNIV
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