A kind of electrothermal film based on graphene/iron oxide composite material and its preparation method

A composite material and graphene technology, which is applied in the direction of electric heating devices, ohmic resistance heating, heating element materials, etc., can solve the problem that the interaction is not fully displayed, and achieve the effect of enhanced scattering, saving process, and easy control

Active Publication Date: 2021-11-05
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If graphene and nano-oxides are added separately, the interaction between the two is not fully demonstrated

Method used

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  • A kind of electrothermal film based on graphene/iron oxide composite material and its preparation method
  • A kind of electrothermal film based on graphene/iron oxide composite material and its preparation method
  • A kind of electrothermal film based on graphene/iron oxide composite material and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of nanometer iron oxide coated graphene powder. Put the expanded graphite into a mixed solvent of DMF and water, and sonicate for 3 hours to obtain a graphene solution. Add ferrous chloride, stir for 5 minutes at room temperature, then put the mixture in a 90-degree water bath and stir for 2 hours, after cooling, perform centrifugal cleaning, dry the sample in an oven at 60°C, and manually grind and disperse to obtain the load Graphene powder of nano iron oxide. The scanning electron microscope image of the composite material is shown in image 3 As shown, it can be seen that the nanoparticles evenly cover the graphene surface, the size of the nanoparticles is about 5nm, and the thickness of the nanoparticle film is basically the size of one particle. Wherein the volume ratio of DMF and water is 7:3. The concentration of ferrous chloride in the solvent is 14mg / mL, and the concentration of graphene in the solvent is 2mg / ml. image 3 The SEM images of diff...

Embodiment 2

[0046] Preparation of nanometer iron oxide coated graphene powder. Put the expanded graphite into a mixed solvent of DMF and water, and sonicate for 3 hours to obtain a graphene solution. Add ferrous chloride, stir for 5 minutes at room temperature, then put the mixture in a 90-degree water bath and stir for 2 hours, after cooling, perform centrifugal cleaning, dry the sample in an oven at 60°C, and manually grind and disperse to obtain the load Graphene powder of nano iron oxide. Wherein the volume ratio of DMF and water is 8:2. The concentration of ferrous chloride in the solvent is 10mg / mL, and the concentration of graphene in the solvent is 1.5mg / ml.

[0047] Prepare the heat-generating film slurry. Weigh 5 parts by weight of nano-iron oxide coated graphene powder, 3 parts by weight of binder and 2 parts by weight of diluent. Wherein the binder is acrylic acid resin, and the diluent can be a special acrylic resin diluent or ethyl acetate. Stir mechanically until homog...

Embodiment 3

[0051] Preparation of nanometer iron oxide coated graphene powder. Put the expanded graphite into a mixed solvent of DMF and water, and sonicate for 3 hours to obtain a graphene solution. Add ferrous chloride, stir for 5 minutes at room temperature, then put the mixture in a 90-degree water bath and stir for 2 hours, after cooling, perform centrifugal cleaning, dry the sample in an oven at 60°C, and manually grind and disperse to obtain the load Graphene powder of nano iron oxide. Wherein the volume ratio of DMF and water is 9:1. The concentration of ferrous chloride in the solvent is 6mg / mL, and the concentration of graphene in the solvent is 1mg / ml.

[0052] Prepare the heat-generating film slurry. Weigh 5 parts by weight of nano-iron oxide coated graphene powder, 3 parts by weight of binder and 2 parts by weight of diluent. Wherein the binder is acrylic acid resin, and the diluent can be a special acrylic resin diluent or ethyl acetate. Stir mechanically until homogene...

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Abstract

The invention discloses an electrothermal film based on a graphene / iron oxide composite material and a preparation method thereof. Expanded graphite and ferrous chloride are used as raw materials, and graphene powder loaded with nano-iron oxide is prepared in one step by a constant temperature magnetic water bath stirring method. body material; followed by mixing the nano-iron oxide-coated graphene composite powder, binder, and diluent together, and mechanically stirring until uniformly made into a heating film slurry; the slurry is evenly coated on the PET film, naturally cured to form a heating film; the upper insulating material is bonded to the bottom insulating material coated with conductive paste by hot pressing to form a composite structure of insulating material-thermal conductive paste-insulating material-infrared reflective layer Electric heating film. The preparation process of the invention is simple and suitable for industrialized production.

Description

technical field [0001] The invention relates to the technical field of electric heating materials, in particular to an electric heating film based on a graphene / iron oxide composite material and a preparation method thereof. Specifically, nano-iron oxide-coated graphene composite material is used as the filling material of the electric heating film, so that the film The layer has good heat generating performance and far-infrared radiation performance. Background technique [0002] Graphene floor heating is a method of converting electrical energy into heat energy. It has high utilization rate of electric heat, quietness, long service life, and better comfort performance than electric heating wire heating and air conditioning heating. It is an environmentally friendly heating method. However, there is still room for improvement in graphene floor heating. The use of chemical methods to prepare graphene oxide is relatively expensive, which is not conducive to a large number of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B3/34H05B3/14H05B3/02
CPCH05B3/02H05B3/145H05B3/34
Inventor 徐军明李苗章林娟赵炜翔杨成明
Owner HANGZHOU DIANZI UNIV
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