Graphene heat conduction master batch for elastomer material and preparation method

An elastomer material, graphene technology, applied in the field of preparation of thermally conductive masterbatches, can solve problems such as the inability to fully utilize the thermal conductivity of graphene, and the difficulty of dispersing graphene, achieve excellent self-lubricating properties, solve agglomeration, good fluidity and Compatibility effect

Inactive Publication Date: 2018-11-02
CHENDU NEW KELI CHEM SCI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] According to the above, the graphene used for thermally conductive fillers in the existing scheme has a very high specific surface area, which causes its agglomeration to be very serious, and there are defects that are difficult to disperse when exfoliated from graphite into graphene, such as directly using graphene In polymer matrixes such as rubber, plastics, coatings, etc., it is easy to reunite, and this agglomeration is an irreversible agglomeration because it occurs between atoms, so that it cannot fully exert the excellent thermal conductivity of graphene sheets. The present invention proposes A graphene thermally conductive masterbatch and preparation method for elastomer materials are proposed, which can effectively solve the above technical problems

Method used

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  • Graphene heat conduction master batch for elastomer material and preparation method

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Effect test

Embodiment 1

[0026] (1) First disperse the expanded graphite in the polyethylene solution containing perfluoroalkyl ethyl methacrylate monomer, irradiate with ultraviolet light, and generate a self-lubricating graft product PE-g- between the expanded graphite layers PFAMAE, PE-g-PFAMAE / expanded graphite is prepared; the ultraviolet wavelength of ultraviolet radiation is 220nm, and the irradiation distance is 16cm; the irradiation is 30min.

[0027] In the preparation process of PE-g-PFAMAE / expanded graphite, in parts by weight, wherein: 64 parts by weight of expanded graphite, 13 parts by weight of perfluoroalkyl ethyl methacrylate monomer, 23 parts by weight of polyethylene solution; , The polyethylene solution is a solution obtained by dissolving polyethylene in benzene with a mass concentration of 20%.

[0028] (2) Add the PE-g-PFAMAE / expanded graphite prepared in step (1) into a co-rotating intermeshing twin-screw extruder for peeling and extruding, and extrude into a mixed material wi...

Embodiment 2

[0032] (1) First disperse the expanded graphite in the polyethylene solution containing perfluoroalkyl ethyl methacrylate monomer, irradiate with ultraviolet light, and generate a self-lubricating graft product PE-g- between the expanded graphite layers PFAMAE, to prepare PE-g-PFAMAE / expanded graphite; the ultraviolet wavelength of ultraviolet radiation is 100nm, the irradiation distance is 10cm; the irradiation time is 45min.

[0033] In the preparation process of PE-g-PFAMAE / expanded graphite, in parts by weight, wherein: 70 parts by weight of expanded graphite, 10 parts by weight of perfluoroalkyl ethyl methacrylate monomer, 20 parts by weight of polyethylene solution; , The polyethylene solution is a solution obtained by dissolving polyethylene in benzene with a mass concentration of 20%.

[0034](2) Add the PE-g-PFAMAE / expanded graphite prepared in step (1) into a co-rotating intermeshing twin-screw extruder for peeling and extruding, and extrude into a mixed material wit...

Embodiment 3

[0038] (1) First disperse the expanded graphite in the polyethylene solution containing perfluoroalkyl ethyl methacrylate monomer, irradiate with ultraviolet light, and generate a self-lubricating graft product PE-g- between the expanded graphite layers PFAMAE is prepared from PE-g-PFAMAE / expanded graphite; the ultraviolet wavelength of ultraviolet radiation is 300nm, and the irradiation distance is 20cm; the irradiation time is 50min.

[0039] In the preparation process of PE-g-PFAMAE / expanded graphite, in parts by weight, wherein: 60 parts by weight of expanded graphite, 15 parts by weight of perfluoroalkyl ethyl methacrylate monomer, 25 parts by weight of polyethylene solution; , The polyethylene solution is a solution obtained by dissolving polyethylene in benzene with a mass concentration of 20%.

[0040] (2) Add the PE-g-PFAMAE / expanded graphite prepared in step (1) into a co-rotating intermeshing twin-screw extruder for peeling and extruding, and extrude into a mixed ma...

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Abstract

The invention relates to the field of heat conduction master batch preparation and discloses a graphene heat conduction master batch for an elastomer material and a preparation method. The preparationmethod comprises the following steps: (1) dispersing expanded graphite into a polyethylene solution with a perfluoroalkyl ethyl methyl methacrylate monomer, and carrying out ultraviolet radiation soas to obtain PE-g-PFAMAE/expanded graphite; (2) carrying out peeling and extrusion so as to obtain a mixed material with dispersed graphene; (3) mixing and kneading the mixed material with porous elastomer microspheres and silicone, and carrying out extrusion pelletizing, thereby obtaining the graphene heat conduction master batch. According to the graphene heat conduction master batch disclosed by the invention, a solid lubricant is generated among expanded graphite layers, effective peeling and dispersion of graphene are achieved, the graphene is further adhered to and packaged inside the porous elastomer microspheres through the silicone to prepare the master batch, the problem of graphene clustering is effectively solved, and heat conduction properties of the graphene can be relativelywell brought into play.

Description

technical field [0001] The invention relates to the field of preparation of heat-conducting masterbatch, and discloses a graphene heat-conducting masterbatch used for elastomer materials and a preparation method. Background technique [0002] With the continuous development of industrial production and science and technology, people have higher and higher requirements for the comprehensive performance of thermal conductive materials, and traditional metal materials can no longer meet the requirements of some special occasions. For example, the rapid accumulation and increase of heat generated by electronic equipment will cause the device to malfunction, so timely heat dissipation has become an important factor affecting its life. Thermally conductive polymer materials, especially thermally conductive plastics, have attracted more and more attention due to their light weight, chemical corrosion resistance, easy processing and molding, excellent electrical insulation performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08L83/04C08L75/04C08F255/02C08F220/24C08F2/44C08F2/48C08K9/04C08K7/24C08J3/22
CPCC08J3/226C08F2/44C08F2/48C08F255/02C08J2451/06C08J2483/04C08K7/24C08K9/04
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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