Nano silver loaded graphene silver kettle and preparation method thereof

Abstract

The invention relates to the field of graphene composite materials, and discloses a nano silver loaded graphene silver kettle and a preparation method thereof. The preparation method of the nano silver loaded graphene silver kettle comprises the steps that a graphene / silver composite material is adopted as the raw material, a billet made from the graphene / silver composite material is obtained after pretreatment, and the nano silver loaded graphene silver kettle is obtained through manual preparation and mold preparation. Accordingly, on the condition that the performance of the silver kettle is not affected, for the silver kettle prepared through the graphene / silver composite material, the material performance is greatly improved, the Vickers hardness is increased to 100-115 from 25, and the thermal conductivity is increased to 1,000-1,500 Wm<-1>K<-1> from 420 Wm<-1>K<-1>; in addition, the nano silver load is high, the antibacterial effect is better, by means of increasing of the Vickers hardness, the problem that 99.9% silver is soft and difficult to machine is solved, the service life is prolonged, and deformation is not prone to occur; compared with a traditional silver kettle,by means of increasing of the thermal conductivity, the water boiling speed is higher, the boiling point is higher, and the silver kettle is more suitable for tea making.

Description

technical field [0001] The invention relates to the field of graphene composite materials, more specifically, to a graphene silver pot loaded with nano-silver and a preparation method thereof. Background technique [0002] In the prior art, there have been some reports on the application of graphene in antibacterial aspects. Germany "Micro" (Small, 20, 20, 2253 pages) has reported a method for synthesizing silver / graphene composites, the method utilizes oxidized graphene oxide to reduce silver nitrate under the alkaline condition of potassium hydroxide to prepare For the silver-graphene composite, potassium hydroxide is required in this method, which not only increases the complexity of the process, but also the product prepared under alkaline conditions will also affect the safety of the product in biological applications. China's "Nano Research" (Nano Research, 2010, Volume 3, page 339) reported a preparation method of a silver / graphene mixture, which used sodium borohydr...

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Problems solved by technology

But the silver particles in the silver / graphene mixture prepared by this method are unevenly dispersed, and its complete antibacterial concentration is as high as 50 μg / ml;

[0003] In summary, the silver / graphene composite material prepared by the method disclosed in the prior art mainly has the following problems: 1. The process is complicated, and there are many preparations in the early stage, and some raw materials that affect biological safety are used, such as potassium hydroxide , hydrazine hydrate or sodium borohydride, etc.; 2. The composite material has fewer functions, lacks further modification treatment, the reduction reaction is insufficient, and the silver particle loading is not high; affect its antibacterial properties

[0005] However, silver pots also have some defects. First, silver itself is a precious metal and is a non-renewable resource. Second, the existing silver pots are all made of thousand-foot silver, which is affected by physical properties and is not easy to machine. If it is processed by hand, the price is high and the output is low. Moreover, the welded joints are easy to crack; during use, because the silver pot is soft, scratches will appear in the light one, and deformation will occur in the heavy one, which seriously affects the service life of the silver pot

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