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A kind of preparation method of 3d porous carbon skeleton matrix composite phase change material

A technology of composite phase change materials and porous carbon materials, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of carbon nanotubes restricting the application and promotion of marketization, and achieve good thermal cycle stability and thermal conductivity Improvement, good economical effect

Active Publication Date: 2020-06-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this society that pursues the maximization of economic benefits, the shortcoming is that the price of carbon nanotubes limits its market application and promotion.

Method used

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  • A kind of preparation method of 3d porous carbon skeleton matrix composite phase change material
  • A kind of preparation method of 3d porous carbon skeleton matrix composite phase change material
  • A kind of preparation method of 3d porous carbon skeleton matrix composite phase change material

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Preparation of 3D porous carbon materials:

[0026] Mix 20 g of sodium hydroxide and 300 mL of acetone, add 9 mL of divinylbenzene, stir vigorously at room temperature for 4 h, then stand at room temperature, normal pressure, and air for 72 h, and transfer the product into a porcelain boat , placed in a tube furnace, under the protection of inert gas, the temperature was raised to 900°C at a rate of 5°C / min, kept at this temperature for 3 hours, and then cooled to 900°C at a rate of 5°C / min room temperature. The calcined product was washed several times with 1 mol / L hydrochloric acid solution to remove unreacted sodium hydroxide in the porous carbon material, washed with deionized water until neutral, and then dried in an oven at 120 °C for 24 h to obtain a 3D porous Carbon material matrix, where SEM such as figure 1 Shown, XRD as figure 2 shown.

[0027] (2) Preparation of composite phase change materials:

[0028] Dissolve 8 g of PEG8000 in 150 mL of absolut...

Embodiment 2

[0030] (1) Preparation of 3D porous carbon materials:

[0031] Mix 20 g of potassium hydroxide and 120 mL of acetaldehyde, add 6 mL of styrene, stir vigorously at room temperature for 3 h, then stand at room temperature, normal pressure, and air for 80 h, and transfer the product into a tube furnace , under the protection of an inert gas, the temperature was raised to 850°C at a rate of 4°C / min, kept at this temperature for 5h, and then cooled to room temperature at a rate of 4°C / min. The calcined product was washed several times with 2.5 mol / L hydrochloric acid solution to remove unreacted potassium hydroxide in the porous carbon material, washed with deionized water until neutral, and then dried in an oven at 130°C for 36 hours to obtain 3D porous carbon Material matrix.

[0032] (2) Preparation of composite phase change materials:

[0033]Dissolve 0.5 g of paraffin in 30 mL of absolute ethanol and stir at 90 °C for 2 h to obtain a homogeneous solution. 0.269 g of the 3D ...

Embodiment 3

[0035] (1) Preparation of 3D porous carbon materials:

[0036] Mix 30 g of sodium carbonate and 200 mL of benzaldehyde, add 8 mL of acrylic acid, stir vigorously at room temperature for 4 h, then stand at room temperature, normal pressure, and air for 96 h, transfer the product into a tube furnace, and Under the protection of an inert gas, the temperature was raised to 800°C at a rate of 3°C / min, kept at this temperature for 4h, and then cooled to room temperature at a rate of 3°C / min. Wash the calcined product several times with 3mol / L hydrochloric acid solution to remove unreacted sodium carbonate in the porous carbon material, wash it with deionized water until neutral, and then dry it in an oven at 150°C for 18 hours to obtain a 3D porous carbon material matrix .

[0037] (2) Preparation of composite phase change materials:

[0038] 0.5 g of stearic acid was dissolved in 35 mL of absolute ethanol and stirred at 75 °C for 2.5 h to obtain a homogeneous solution. 0.333 g o...

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Abstract

A preparation method of a three-dimensional (3D) porous carbon skeleton-based composite phase change material belongs to the field of composite phase change materials. The preparation method of the 3D porous carbon skeleton-based composite phase change material comprises the following steps: reacting soluble alkali with organic ketone or aldehyde at normal temperature, carbonizing the product at high temperature and at inert gas atmosphere by adjusting the variety and content of a cross-linking agent to prepare a 3D porous carbon material carrier, and regulating and controlling the pore diameter of the 3D porous carbon material carrier by the cross-linking agent to match the carrier with a phase change core material; preparing the soluble phase change core material into solution by a solution dipping method, dispersing the 3D porous carbon skeleton materials into the solution, adsorbing and limiting the phase change core material into pore channels by utilizing the pore channel structure of the 3D porous carbon material, and drying at the temperature higher than the phase change temperature to obtain the 3D porous carbon-based composite phase change material. The preparation method of the 3D porous carbon skeleton-based composite phase change material provided by the invention has the advantages that the method is simple and quick, and is suitable for industrialized application of novel carbon-based composite phase change materials; a variety of core materials can be selected, so the problems of leakage, corrosion and the like can be effectively avoided, and the advantage that the pore channel structure can be adjusted is achieved; the load cavity and the heat-conducting property of the porous carbon-based composite phase change material can be improved obviously, and high economical efficiency and heat cycle stability are achieved.

Description

technical field [0001] The invention belongs to the field of nano-composite phase-change materials, and in particular relates to a preparation method of a 3D porous carbon skeleton-based composite phase-change material. Background technique [0002] Phase Change Material (Phase Change Material) can use the phase change process of the material to absorb and store the heat of the environment, and release the heat when needed, which can effectively solve the imbalance between the supply and demand of space-time heat energy. At present, phase change materials have been widely used in many fields such as building energy saving, industrial waste heat utilization, and solar energy utilization. Once this material is widely used in human daily life, it will become the best green carrier for energy conservation and environmental protection, and it has been listed as a national research and development utilization sequence in our country. Among them, solid-liquid phase change material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 王戈陈晓杨穆高鸿毅张欢李昂刘丽萍汤甲
Owner UNIV OF SCI & TECH BEIJING
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