Method for preparing thermal conduction enhanced phase change energy storage wood based on photothermal response

A technology of phase change energy storage and heat conduction enhancement, which is applied in the direction of heat exchange materials, wood treatment, wood heating, etc., to achieve the effect of improving energy utilization and energy storage effect

Inactive Publication Date: 2019-08-16
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of organic solid-liquid phase change materials to the field of wood is still in its infancy

Method used

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  • Method for preparing thermal conduction enhanced phase change energy storage wood based on photothermal response
  • Method for preparing thermal conduction enhanced phase change energy storage wood based on photothermal response

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Measure 250 mg of graphene oxide powder and ultrasonically disperse in 50 mL of deionized water to prepare a 5 mg / ml graphene oxide dispersion. Then add 1g of sodium hydroxide and 1g of chloroacetic acid, ultrasonicate at 400W for 3h, then centrifuge at 8000r / min for 10min, wash with deionized water 2-3 times, use dialysis bags to dialyze until neutral to obtain well-dispersed carboxylated oxidation Graphene aqueous dispersion.

[0025] (2) Use polyethylene glycol-800 as the phase change material, put 21g polyethylene glycol-800 in a beaker, put it in a water bath at 50°C, wait until the polyethylene glycol-800 becomes molten, add 9g Absolute ethanol, magnetically stirred for 1 h, and prepared a polyethylene glycol solution with a concentration of 70%, called A, for later use. Measure 200mg of carboxylated graphene oxide aqueous dispersion and 2g of aminated polyethylene glycol-800, magnetically stir for 20min, then ultrasonic for 10min, then add 1mg of 1-(3-dimeth...

Embodiment 2

[0029] (1) Measure 500 mg of graphene oxide powder and ultrasonically disperse in 100 mL of deionized water to prepare a 5 mg / ml graphene oxide dispersion. Then add 2g of sodium hydroxide and 2g of chloroacetic acid, ultrasonicate at 400W for 3h, then centrifuge at 8000r / min for 10min, wash with deionized water 2-3 times, and dialyze to neutral with a dialysis bag to obtain a well-dispersed carboxylated oxidation Graphene aqueous dispersion.

[0030] (2) Use polyethylene glycol-800 as the phase change material, put 42g polyethylene glycol-800 in a beaker, put it in a water bath at 50°C, wait until the polyethylene glycol-800 becomes molten, add 18g Absolute ethanol, magnetically stirred for 1 h, and prepared a polyethylene glycol solution with a concentration of 70%, called A, for later use. Measure 400mg of carboxylated graphene oxide aqueous dispersion and 4g of aminated polyethylene glycol-800 magnetically stir for 20min and then ultrasonic for 10min, then add 2mg of 1-(3-...

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Abstract

The invention discloses a method for preparing a thermal conduction enhanced phase change energy storage wood based on photothermal response. The method mainly comprises the following steps: (1) carboxylating graphene oxide to obtain carboxylated graphene oxide, performing conjugate grafting on the carboxylated graphene oxide by using ammoniated multi-arm polyethylene glycol, controlling the amount of polyethylene glycol grafted on the surface of graphene, and blending the polyethylene glycol-grafted graphene with polyethylene glycol to prepare a phase change energy storage material; and (2) preprocessing wood with a low-concentration sodium hydroxide and sodium sulfite solution, preparing a solution by using maleic anhydride as esterification agent and acetone as a solvent, impregnating the preprocessed wood in the solution, allowing the above obtained graphene / polyethylene glycol phase change energy storage suspension to infiltrate the wood by a vacuum pressurizing full-cell process,and regulating a multidimensional interpenetrating network structure to obtain the thermal conduction enhanced phase change energy storage wood. A firm amide bond can be formed between graphene and polyethylene glycol to ensure the stability of the phase change system.

Description

[0001] (1) Technical field [0002] The present invention relates to a method for preparing thermal conductivity-enhanced phase-change energy storage wood based on photothermal response, especially a method for preparing thermal conductivity-enhanced phase-change energy storage material [0003] (2) Background technology [0004] In recent years, the issue of energy conservation and environmental protection has become one of the important factors affecting social and economic development. With the rapid development of industrial society, the demand and dependence of human beings on energy are increasing, and the development of new green energy, the improvement of energy utilization rate, and the research and development of energy-saving technologies and materials are becoming more and more important. In this context, phase change energy storage technology emerged as the times require. Phase change materials can absorb heat energy through phase changes under heating conditions a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/00B27K3/10B27K3/52B27K5/04C09K5/06
CPCB27K3/10B27K3/52B27K5/001B27K5/04C09K5/063
Inventor 刘毅李彦辰方晓阳张伟业夏容绮杨颖妮赵俊淇王蓓蓓
Owner BEIJING FORESTRY UNIVERSITY
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