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Graphene-based silver composite and graphene-based silver multifunctional water-based paint

A graphene-based, composite material technology, applied in fire-resistant coatings, coatings, etc., can solve the problems of large particle size, uneven distribution, inability to meet the use requirements of water-based coatings, etc., achieve low production costs, improve flame retardant effect, The effect of excellent electromagnetic shielding performance

Active Publication Date: 2017-11-03
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] One of the purposes of the present invention is to provide a graphene-based silver composite material to solve the problem that the existing graphene-based silver composite material has a large particle size, uneven distribution, and cannot meet the requirements for the use of water-based coatings.

Method used

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  • Graphene-based silver composite and graphene-based silver multifunctional water-based paint
  • Graphene-based silver composite and graphene-based silver multifunctional water-based paint
  • Graphene-based silver composite and graphene-based silver multifunctional water-based paint

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Embodiment 1

[0028] Embodiment 1: Preparation of graphene-based silver composite material.

[0029] 0.08g of silver nitrate was dissolved in 1.5mL of water to obtain an aqueous solution of silver nitrate, and the aqueous solution of silver nitrate was added dropwise to 0.5g of graphene oxide, and freeze-dried for 12h to obtain a silver nitrate / graphene oxide mixture. / graphene oxide mixture is placed in a tube furnace, and the temperature of the furnace is raised from room temperature to 300°C at a rate of 10°C / min. After the silver nitrate / graphene oxide mixture explodes into powder, it is introduced Pure N 2 , and adjust the furnace temperature to 200° C., and keep it warm for 60 minutes to obtain a graphene-based silver composite material.

[0030] Gained material is carried out transmission electron microscope analysis and X-ray energy spectrum analysis, obtained result is as follows Figure 1~6 shown by Figure 1~5 It can be seen that nano-silver (with a particle size of 2~20nm) is...

Embodiment 2

[0032] Embodiment 2: the preparation of graphene-based silver composite material.

[0033] Dissolve 0.025g of silver nitrate in 1.5mL of water to obtain an aqueous solution of silver nitrate, add the aqueous solution of silver nitrate dropwise to 0.5g of graphene oxide, and freeze-dry for 12 hours to obtain a mixture of silver nitrate / graphene oxide. The graphene oxide mixture was placed in a tube furnace, and the furnace temperature was raised from room temperature to 250°C at a rate of 10°C / min. After the silver nitrate / graphene oxide mixture exploded into powder, pure N 2 , and adjust the furnace temperature to 200° C., and keep it warm for 60 minutes to obtain a graphene-based silver composite material. Since the loading amount of silver is less than 10% of the mass of graphene oxide, the distribution of Ag particles on graphene is sparse, not dense and the particle size distribution range of nano-silver is wide.

Embodiment 3

[0034] Embodiment 3: the preparation of graphene-based silver composite material.

[0035] Dissolve 0.20g of silver nitrate in 1.5mL of water to obtain an aqueous solution of silver nitrate, add the aqueous solution of silver nitrate dropwise to 0.5g of graphene oxide, and freeze-dry for 12 hours to obtain a mixture of silver nitrate / graphene oxide. The graphene oxide mixture was placed in a tube furnace, and the furnace temperature was raised from room temperature to 250°C at a rate of 10°C / min. After the silver nitrate / graphene oxide mixture exploded into powder, pure N 2 , and adjust the furnace temperature to 200° C., and keep it warm for 60 minutes to obtain a graphene-based silver composite material. Since the loading of silver is greater than 20% of the mass of graphene oxide, the Ag particles partially agglomerate on the graphene, and the particle diameter ranges from 1 to 100 nm.

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Abstract

The invention provides a graphene-based silver composite and graphene-based silver multifunctional water-based paint. The graphene-based silver composite is prepared by the following steps of: dissolving silver salt in water to form a silver salt aqueous solution, dropwise adding the silver salt aqueous solution into graphite oxide in a constant speed, performing freeze-drying to form a silver salt / graphite oxide mixture, loading the silver salt / graphite oxide mixture in a dry quartz tube, putting the quartz tube in a tube furnace, rising the temperature of the furnace to 250-300 DEG C at a rate of 10-15 DEG C / min, supplying pure nitrogen, adjusting the temperature to 200 DEG C, and holding the temperature for 60min. The graphene-based silver composite which is adjustable in morphology, particle size and dispersion is prepared; silver is uniformly dispersed in the graphene in a form of nanoparticles (2-20nm); the problems of a large particle size, nonuniform distribution and low loading of silver particles are solved; and when the composite is used for the water-based paint, the flame retardancy, electromagnetic shielding, thermostability and mechanical properties of the paint can be improved.

Description

technical field [0001] The invention relates to a graphene-based composite material and a water-based paint added with the composite material, in particular to a graphene-based silver composite material and a graphene-based silver multifunctional water-based paint. Background technique [0002] In recent years, with the improvement of environmental protection requirements, water-based coatings with low VOC emissions have gradually become the main direction of coating development. In 2016, the output of water-based coatings in my country was 18.9978 million tons, with an output value of 435.449 billion yuan. It is estimated that the demand for water-based coatings in 2022 will be More than 30 million tons, the market prospect is huge. With the development of electronic information technology and the popularization of electronic products, electromagnetic radiation, electromagnetic pollution and electromagnetic interference widely exist, causing great harm to the environment and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/14C09D7/12C09D5/18C08K13/02C08K3/04C08K3/08C08K3/32C08K5/053C08K5/3492
CPCC08K3/04C08K3/08C08K3/32C08K5/053C08K5/34922C08K13/02C08K2003/0806C08K2003/323C08L2201/02C08L2201/08C09D5/18C09D133/14
Inventor 徐建中董阳霍莉高勇军申奇谢吉星
Owner HEBEI UNIVERSITY
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