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Graphene oxide-butyronitrile latex composite foam material and preparation method thereof

A technology of syntactic foam and nitrile rubber, which is applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of affecting the electrical conductivity of composite materials, strong van der Waals force between GO sheets, unfavorable dispersion, etc., and achieve a good solvent. Adsorption capacity, rich pore structure, improving the effect of agglomeration and uneven dispersion

Active Publication Date: 2022-05-13
TAIYUAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of practical application, it is found that the van der Waals force between GO sheets is strong and easy to stack, which is not conducive to its dispersion in the polymer, and the agglomeration in the polymer will lead to the formation of defect points, which will affect the electrical conductivity of the composite material.

Method used

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  • Graphene oxide-butyronitrile latex composite foam material and preparation method thereof
  • Graphene oxide-butyronitrile latex composite foam material and preparation method thereof
  • Graphene oxide-butyronitrile latex composite foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1.1 Preparation of PVP modified GO dispersion:

[0049]Prepare an aqueous solution of GO with a concentration of 9 mg / mL, ultrasonically disperse it for 3 hours, and then process it in a high-speed centrifuge at 20,000 r / min for 10 minutes to remove unpeeled and unevenly dispersed GO sheets to prepare an aqueous dispersion of GO;

[0050] According to the mass ratio of PVP to GO of 1:1, PVP was put into the aqueous dispersion of GO, and ultrasonic dispersion was continued for 5 h to obtain a stable and uniform dispersion of PVP-modified GO.

[0051] 1.2 Preparation of GO-NBR mixed dispersion:

[0052] Put the dispersion of PVP modified GO in NBR latex, and mix it uniformly with 700r / min magnetic stirring at room temperature for 1h to make a mixed dispersion of GO and NBR. The mass ratio of GO to NBR is 20mg:80mg. Add 28wt% ammonia water dropwise to the solution to adjust the pH value of the solution to 10. At this time, both the GO solution and the NBR latex are negati...

Embodiment 2

[0058] The difference between this embodiment and embodiment 1 is:

[0059] In step 1.1, the aqueous solution concentration of the GO of configuration is 9mg / mL, and in the mixed dispersion liquid of GO and NBR made in step 1.2, the mass ratio of GO and NBR is 30mg:70mg; In step 1.4, composite foam matrix material The heating temperature is 170° C., and the heating time is 170 minutes.

Embodiment 3

[0061] The difference between this embodiment and embodiment 1 is:

[0062] In step 1.2, the aqueous solution concentration of the GO of configuration is 9mg / mL, and in the mixed dispersion liquid of GO and NBR of making, the mass ratio of GO and NBR is 40mg:60mg; In step 1.4, the heating temperature of composite foam matrix material is 200°C, heating time is 120min.

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Abstract

The invention discloses a graphene oxide-butyronitrile latex composite foam material and a preparation method thereof, and belongs to the technical field of composite material preparation, and the preparation method comprises the following steps: (1) uniformly mixing a graphene oxide dispersion liquid and butyronitrile latex to prepare a mixed dispersion liquid, and adjusting the pH value of the mixed dispersion liquid; (2) freezing the mixed dispersion liquid and then performing vacuum freeze drying to obtain a composite foam matrix material; and (3) heating and crosslinking the composite foam matrix material to prepare the graphene oxide-butyronitrile latex composite foam material. The graphene oxide and the butyronitrile latex are fully dispersed and mixed by controlling the electrostatic interaction between the graphene oxide and the butyronitrile latex, so that the phenomenon of uneven agglomeration and dispersion of the graphene oxide is improved; by controlling the concentration and freezing temperature of the graphene oxide solution, the sizes and structures of the cells are regulated and controlled; by controlling the heating temperature and the heating time, the graphene oxide is decomposed at high temperature to release free radicals to initiate high-temperature self-vulcanization crosslinking of the butyronitrile latex, and it is guaranteed that the composite foam has high compression strength.

Description

technical field [0001] The invention relates to a graphene oxide-nitrile latex composite foam material and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] In actual product applications, nanoscale graphene two-dimensional sheet materials usually need to form macroscopic bulk materials, and it is difficult for macroscopic bulk materials to fully exhibit the excellent intrinsic properties of two-dimensional sheet materials, mainly because two-dimensional sheet materials The stacking of Π-Π is easy to occur between the material surface and the surface, resulting in the loss of specific surface area, the increase of contact thermal resistance and electrical resistance, etc. The three-dimensional foam structure prepared by the self-assembly of graphene two-dimensional sheet materials can combine the unique intrinsic characteristics of graphene two-dimensional sheet materials with the porous structure of three-di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L9/04C08K9/04C08K3/04C01B32/198
CPCC08J9/286C08J9/009C01B32/198C08J2309/04
Inventor 王林艳张涛郝明正崔海波王龙梁玉蓉
Owner TAIYUAN INST OF TECH
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