A kind of liquid silver-graphene oxide complex and its preparation method and application

A technology of graphene and graphene, which is applied in the field of preparation of graphene oxide/silver/modified titanium dioxide composites, can solve the problems of reducing the antibacterial performance of materials, achieve high antibacterial performance and prolong the effect of release time

Inactive Publication Date: 2016-02-03
JINHU JINLING NEW MATERIAL SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in the existing antibacterial materials, silver ions are easy to quickly enter the ion state from the chemically bound state and leave the composite material system, thereby reducing the antibacterial performance of the material.

Method used

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  • A kind of liquid silver-graphene oxide complex and its preparation method and application
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  • A kind of liquid silver-graphene oxide complex and its preparation method and application

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Embodiment 1

[0021] Using flake graphite as raw material, prepare graphene oxide by Hummer method: first weigh 0.5g flake graphite, 0.25g KNO 3 , placed in a 500mL three-neck flask, add 12mL concentrated H 2 SO 4 , and magnetically stirred for 30 min in an ice-bath environment. Then slowly add 1.5g KMnO 4 , stirred at 35°C for 24h, then slowly added 150mLH 2 O, stirred for 12h. Then move the three-necked flask into an oil bath, and react at 98°C for 24h. After cooling to room temperature, wash with suction, wash with HCl first, then wash with H 2 O was washed to neutral to prepare graphene oxide.

[0022] (1) Using the graphene oxide prepared above, prepare 10 mL of a graphene oxide suspension with a concentration of 2.5 mg / mL and ultrasonically obtain a clear graphene oxide hydrosol, then add KOH solid at a final concentration of 0.10 g / mL and in React in a water bath environment at 60°C for 2.5 hours, then add concentrated hydrochloric acid (37% solute mass fraction) to adjust the...

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Abstract

The invention belongs to the field of preparation of antibacterial materials and in particular relates to a preparation method and application of an oxidized graphene / silver / modified titanium dioxide complex. The preparation method comprises the following steps: by taking crystalline flake graphite as a raw material, preparing oxidized graphene by a Hummer method, and preparing an oxidized graphene solution; and mixing the solution with nanometer titania on the surface of which polyacrylate is grafted and a silver salt, boiling the mixture, and performing ultrafiltration tube elution, thus obtaining the composite slow release antibacterial material. The antibacterial material and a thermoplastic resin can be subjected to blending extrusion and film blowing to prepare plastic with a long-lasting continuous high-efficiency antibacterial effect.

Description

technical field [0001] The invention belongs to the field of preparation of antibacterial materials, in particular to a preparation method and application of a graphene oxide / silver / modified titanium dioxide composite. Background technique [0002] There are many kinds of microorganisms, including prokaryotic microorganisms (such as bacteria), eukaryotic microorganisms (such as fungi, algae and protozoa) and cell-free organisms (such as viruses). They are small in size but closely related to human life, production and survival. Involving health, food, medicine, industry and agriculture, environmental protection and many other fields. Among them, the infection of pathogenic microorganisms, especially bacteria, has brought great harm to the breeding industry and human health, and caused huge economic losses. Therefore, the research and practical application of antibacterial aspects have always been widely concerned. Antimicrobial agents in the traditional sense include antib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/16A01P1/00C08F292/00C08L23/06C08K9/04C08K9/02C08K3/22C08K3/04C08K3/08C09C1/36C09C3/10
Inventor 赵晓燕纪俊玲金长春唐鹏飞汪媛
Owner JINHU JINLING NEW MATERIAL SCI & TECH
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