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Preparation method of a thermally conductive elastic shape-setting phase change energy storage material

A technology of shape-setting phase change and energy storage materials, applied in the direction of heat exchange materials, chemical instruments and methods, etc., to achieve good environmental friendliness, high enthalpy change value, and good comprehensive performance

Active Publication Date: 2021-01-26
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on the use of two-dimensional graphene oxide and one-dimensional carbon nanotubes to make hybrid aerogels, and to use their three-dimensional network structure to enhance the thermal conductivity of polymers and PCMs.

Method used

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  • Preparation method of a thermally conductive elastic shape-setting phase change energy storage material
  • Preparation method of a thermally conductive elastic shape-setting phase change energy storage material
  • Preparation method of a thermally conductive elastic shape-setting phase change energy storage material

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Embodiment 1

[0046] A method for preparing a thermally conductive elastic shape-setting phase-change energy storage material, comprising the following steps:

[0047] Step 1. Prepare graphene oxide (GO) by the improved Hummers method, prepare 1.75 mg / mL graphene oxide solution, add 21.875 mg carbon nanotubes (CNTs) to 25 mL graphene oxide solution, stir magnetically for 30 min, and ultrasonically 60min to obtain a homogeneous mixed solution, add 0.052g reducing agent sodium bisulfite to the homogeneous mixed solution, stir for 5min, and then place it in a 95°C oven for self-assembly reaction for 5h, that is, self-assembled graphene oxide / carbon nanotubes Hybrid hydrogel; place the obtained graphene oxide / carbon nanotube hybrid hydrogel in 10% ethanol aqueous solution for dialysis for 48 hours, pre-freeze the dialyzed hydrogel in the refrigerator for 24 hours, and place in- Freeze-dry at 50°C for more than 48 hours to obtain graphene oxide / carbon nanotube hybrid airgel (GCA);

[0048] Step...

Embodiment 2

[0051] A method for preparing a thermally conductive elastic shape-setting phase-change energy storage material, comprising the following steps:

[0052] Step 1. Prepare graphene oxide (GO) by the improved Hummers method, prepare 1.75 mg / mL graphene oxide solution, add 21.875 mg carbon nanotubes (CNTs) to 25 mL graphene oxide solution, stir magnetically for 30 min, and ultrasonically 60min to obtain a homogeneous mixed solution, add 0.052g reducing agent sodium bisulfite to the homogeneous mixed solution, stir for 5min, and then place it in a 95°C oven for self-assembly reaction for 5h, that is, self-assembled graphene oxide / carbon nanotubes Hybrid hydrogel; place the obtained graphene oxide / carbon nanotube hybrid hydrogel in 10% ethanol aqueous solution for dialysis for 48 hours, pre-freeze the dialyzed hydrogel in the refrigerator for 24 hours, and place in- Freeze drying at 50°C for more than 48 hours to obtain graphene oxide / carbon nanotube hybrid airgel;

[0053] Step 2:...

Embodiment 3

[0056] A method for preparing a thermally conductive elastic shape-setting phase-change energy storage material, comprising the following steps:

[0057] Step 1. Prepare graphene oxide (GO) by the improved Hummers method, prepare 1.75 mg / mL graphene oxide solution, add 21.875 mg carbon nanotubes (CNTs) to 25 mL graphene oxide solution, stir magnetically for 30 min, and ultrasonically 60min to obtain a homogeneous mixed solution, add 0.052g reducing agent sodium bisulfite to the homogeneous mixed solution, stir for 5min, and then place it in a 95°C oven for self-assembly reaction for 5h, that is, self-assembled graphene oxide / carbon nanotubes Hybrid hydrogel; place the obtained graphene oxide / carbon nanotube hybrid hydrogel in 10% ethanol aqueous solution for dialysis for 48 hours, pre-freeze the dialyzed hydrogel in the refrigerator for 24 hours, and place in- Freeze drying at 50°C for more than 48 hours to obtain graphene oxide / carbon nanotube hybrid airgel;

[0058] Step 2:...

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Abstract

The invention discloses a preparation method of a thermally conductive elastic shape-setting phase-change energy storage material, comprising: preparing graphene oxide / carbon nanotube hybrid airgel; heating polyethylene glycol to 60-70°C to obtain molten polyethylene glycol Diol: Mix methyl methacrylate and butyl acrylate, stir for 25-45 minutes, heat to 60-70°C, add the initiator, continue stirring for 25-45 minutes, then add molten polyethylene glycol, continue Stir for 60 minutes to obtain a mixed solution; add the graphene oxide / carbon nanotube hybrid airgel to the mixed solution, place in a vacuum oven, heat to 65°C, and evacuate to 0.02Mpa, so that the mixed solution enters the airgel and reacts After 24 hours, the thermally conductive elastic shape-setting phase change energy storage material was obtained. The thermally conductive elastic shape-setting phase change energy storage material prepared by the present invention has a high enthalpy change value, and the error between the actual latent heat value and the theoretical value is as low as -0.8%. The introduction of graphene oxide / carbon nanotube hybrid airgel can further improve the material The thermal decomposition temperature of the material is better.

Description

technical field [0001] The invention relates to the technical field of heat utilization products, in particular to a preparation method of a thermally conductive elastic shape-fixed phase-change energy storage material. Background technique [0002] The energy utilization of renewable resources is an important issue nowadays, and researchers have been adopting different approaches to solve the energy crisis of renewable resources. The increasing consumption of non-renewable resources and global warming are forcing people to turn to sustainable energy sources. Therefore, renewable energy and sustainable resources must be explored in order to meet the conversion and storage needs of electric energy and thermal energy, and to solve the problem of energy supply and demand. The decarbonization of the energy sector can be achieved by integrating renewable energy with various thermal energy storage systems, resulting in thermal energy storage systems with >96% round-trip effici...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/14C08F220/18C08F2/02C09K5/06C08K3/04
CPCC08F2/02C08F283/06C08K2201/011C09K5/063C08K3/041C08K3/042C08F220/14C08F220/1804
Inventor 何方方杨文彬曹倩芸李永升
Owner SOUTHWEAT UNIV OF SCI & TECH
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