Preparation method of graphene heat conduction and dissipation film for floor

A technology of graphene and heat dissipation film, which is applied in the field of preparation of graphene heat dissipation film for flooring, which can solve the problems of complex preparation process of heat conduction film, difficulty in uniform dispersion of graphene layer, and easy damage of corners, etc., to make up for flammable , good mechanical properties, excellent thermal conductivity and heat dissipation effect

Active Publication Date: 2020-06-19
ANHUI YANGZI FLOORING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing heat conduction films are graphite and polyimide, or graphene-graphite composite heat dissipation films, and most of them are used in electronic products. Compared with floor heating floors, the preparation process of these heat conduction films is complicated, and graphene It is not easy to disperse evenly during layer preparation, and the corners are easily damaged

Method used

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  • Preparation method of graphene heat conduction and dissipation film for floor
  • Preparation method of graphene heat conduction and dissipation film for floor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of polyurethane emulsion:

[0043] A1. Under the protection of nitrogen, add 100g of isophorone diisocyanate, 70g of polycarbonate diol, 25g of 1,4-butanediol and 1g of dibutyltin dilaurate into the reaction flask, raise the temperature to 85°C, and react 3- 5h, then add 5g of 2,2-dimethylolpropionic acid, and continue to react at 85°C for 3h to obtain prepolymer 1;

[0044] A2. Add 15g of methyl methacrylate, 7g of triethylamine and 400g of deionized water to 100g of prepolymer 1, stir and mix for 30min to obtain a polyurethane dispersion;

[0045] A3. Heat 100g of polyurethane dispersion to 80°C, add 0.5g of azobisisobutyronitrile, react for 3h, and distill off the solvent under reduced pressure to obtain polyurethane emulsion A.

Embodiment 2

[0047] Preparation of polyurethane emulsion:

[0048] A1. Under the protection of nitrogen, add 100g of isophorone diisocyanate, 80g of polycarbonate diol, 20g of 1,4-butanediol and 1g of dibutyltin dilaurate into the reaction flask, raise the temperature to 85°C, and react 3- 5h, then add 8g of 2,2-dimethylolpropionic acid, and continue to react at 85°C for 3h to obtain prepolymer 1;

[0049] A2. Add 15g of methyl methacrylate, 7g of triethylamine and 400g of deionized water to 100g of prepolymer 1, stir and mix for 30min to obtain a polyurethane dispersion;

[0050] A3. Heat 100g of polyurethane dispersion to 80°C, add 1g of azobisisobutyronitrile, react for 3h, and distill off the solvent under reduced pressure to obtain polyurethane emulsion B.

Embodiment 3

[0052] Preparation of PET film:

[0053] B1. Add 5g of dried graphene oxide into 200g of ethylene glycol, ultrasonically disperse for 2h, then add 100g of terephthalic acid, 0.5g of antimony trioxide and 2g of triphenyl phosphite, mix well, and put into the polymerization kettle In 220 ° C, 0.3MPa under the conditions of 8 hours to obtain PET prepolymer;

[0054] B2. Add 10 g of 9,10-dihydro-9-oxa-10-phosphophenanthrene-succinic acid to the PET prepolymer, heat to 260°C and continue the reaction for 8 hours, then stop the reaction, discharge and pelletize After drying, modified PET is obtained;

[0055] B3. The modified PET film is melt-extruded, and the modified PET film A is obtained after casting cooling, corona treatment, trimming and winding treatment.

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Abstract

The invention discloses a preparation method of a graphene heat conduction and dissipation film for a floor. The method comprises the following specific preparation steps: S1, adding graphene powder into a polyurethane emulsion, adding a surfactant, and uniformly stirring to obtain a graphene mixed emulsion; S2, uniformly coating a modified PET film with the graphene mixed emulsion, wherein the PET film is coated with the graphene mixed emulsion through a table type coating machine, and the thickness of the graphene mixed emulsion ranges from 10 micrometers to 20 micrometers; S3, drying the coated modified PET film at 70-90 DEG C for 8-16 hours to obtain a graphene heat conduction and dissipation film semi-finished product; and S4, performing hot rolling treatment on the graphene heat conduction and dissipation film semi-finished product by using a double-roller roller press to obtain the graphene heat-conducting and heat-dissipating film. According to the invention, polyurethane emulsion is used as a solvent to disperse graphene powder so as to uniformly coat the surface of a modified PET film with the graphene, and the polyurethane emulsion forms a cross-linked cured layer afterbeing dried, so that the modified PET film is conveniently attached to a floor base material, and a graphene sheet layer is protected.

Description

technical field [0001] The invention relates to the technical field of graphite materials, in particular to a method for preparing a graphene heat-conducting and heat-dissipating film for floors. Background technique [0002] Floor heating refers to the floor suitable for low-temperature hot water floor heating. To measure the real floor heating needs many specific technical parameters. First of all, it must have good heat conduction and heat dissipation. Therefore, many existing floor heating floors are developing more Environmentally friendly flooring materials with better heat conduction and heat dissipation performance. [0003] Graphite is a material with excellent thermal conductivity. In recent years, thermally conductive graphite film has developed rapidly. Thermally conductive graphite film is also known as thermally conductive graphite sheet, heat-dissipating graphite film, graphite heat-dissipating film and so on. Thermally conductive graphite film is a new type ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D175/04C09D133/12C09D7/61C08L67/02C08K3/04C08J5/18C08G63/692C09K5/14
CPCC09D175/04C09D7/61C08J5/18C08G63/6926C09K5/14C08J2367/02C08J2475/04C08K3/042C08L33/12Y02P20/10
Inventor 雷响周玉刚刘玉和
Owner ANHUI YANGZI FLOORING
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