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Composite shape-stabilized phase change material with light absorption and conductive properties and preparation method thereof

A technology for shaping phase change materials and properties, applied in heat exchange materials, chemical instruments and methods, climate sustainability, etc., can solve problems that have not been discussed, and achieve excellent electrical conductivity, good light absorption performance, and simple preparation process Effect

Inactive Publication Date: 2013-05-08
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] J.L.Zeng et al. (Polyaniline / 1-Tetradecanol Composites Form-stable PCMS and electrical conductive materials, Journal of Thermal Analysis and Calorimetry, Journal of Thermal Analysis and Calorimetry, 2008, 91, 455) used conductive polymer polyaniline to encapsulate organic phase change materials Tetradecyl alcohol, while improving the thermal conductivity of the phase change material, makes the composite phase change material conductive, but this technology does not discuss the conversion of electrical energy into thermal energy stored in the phase change material, while the electrical energy is efficiently converted into thermal energy and stored in the phase change material. Phase change materials are widely used in the field of power peak regulation, and it is necessary to conduct in-depth research

Method used

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  • Composite shape-stabilized phase change material with light absorption and conductive properties and preparation method thereof
  • Composite shape-stabilized phase change material with light absorption and conductive properties and preparation method thereof
  • Composite shape-stabilized phase change material with light absorption and conductive properties and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] Carbon nanotube sponge, a new type of carbon material with three-dimensional connected porous properties, was prepared by chemical vapor deposition. The specific steps were to dissolve ferrocene in 1,2-dichlorobenzene and make the concentration 0.06g / mL, and then in At 860°C, the 1,2-dichlorobenzene solution of ferrocene was injected into the reaction tube through a syringe pump, and at the same time, hydrogen and helium were fed at a rate of 300mL / min and 2000mL / min respectively, and the reaction lasted for 12 hours to obtain carbon nanotube sponge. Take 0.9g of paraffin wax with a melting point of 20.3°C and a phase transition enthalpy of 136.1J / g and heat it to melt until the temperature reaches 100°C, and slowly pour the paraffin wax in liquid state onto 0.1g of carbon nanotube sponge. Keep the mixture at 100°C for half an hour under vibration, use a grinder to grind the mixture at room temperature, place the ground mixture in a mold and press it under a pressure of...

Embodiment 2

[0038]Carbon nanotube arrays, a new type of carbon material with three-dimensional connected porous properties, were prepared by chemical vapor deposition. The specific steps were to dissolve ferrocene in xylene to a concentration of 0.06 g / mL, and then dissolve The toluene solution was poured into the reaction tube through a syringe pump, and at the same time hydrogen and helium were fed at a rate of 300mL / min and 2000mL / min, respectively, and the reaction lasted for 12 hours to obtain a carbon nanotube array. Take 0.9g of paraffin wax with a melting point of 35.7°C and a phase transition enthalpy of 231J / g and heat it to melt until the temperature reaches 100°C, and slowly pour the liquid paraffin on 0.1g of carbon nanotube arrays. Keep the mixture at 100°C for half an hour under vibration, use a grinder to grind the mixture at room temperature, place the ground mixture in a mold and press it under a pressure of 1 MPa to obtain a mass fraction of 90%. Composite shape-setting...

Embodiment 3

[0041] First prepare graphene gel according to the literature method, add 110mL concentrated sulfuric acid to the ice-water bath beaker at a constant temperature of 0°C and stir, add 5g flake graphite powder, and then add 2.5g NaNO 3 , slowly add 15gKMnO 4 and stirred for 1.5 hours. After raising the temperature to 35°C and stirring for 30 minutes, while stirring at about 70°C, slowly add 220mL of deionized water, and then slowly add 137.83mL of 5% hydrogen peroxide. Finally, 500 mL of HCl was added to the above solution and allowed to stand until the layers were separated. After adding 2000mL to wash, until neutral after several times. Take 0.9g of stearyl alcohol with a melting point of 57°C and a phase transition enthalpy of 239J / g and heat it to melt until the temperature reaches 120°C. Slowly pour the stearyl alcohol in liquid state onto 0.1g of graphene gel. Keep the mixture at 120°C for half an hour under vibration, use a grinder to grind the mixture at room temperat...

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Abstract

The invention provides a composite shape-stabilized phase change material with light absorption and conductive properties and a preparation method thereof. The material consists of 5-15 percent of porous carbon material and 85-95 percent of organic phase change material distributed in the porous carbon material, wherein the organic phase change material is distributed in the porous carbon material. The method comprises the following steps of: preparing a carbon material with the three-dimensional communicating porous property; heating and fusing the organic phase change material and casting the organic phase change material on the porous carbon material; shocking the mixture at the temperature of 100-120 DEG C for a certain time so as to uniformly distribute the organic phase change material in the porous carbon material; and grinding the mixture at room temperature, and pressing and forming the material in a die. The composite shape-stabilized phase change material has high heat conduction, light absorption and conductivity; the heat transfer efficiency of the phase change material can be obviously improved; and meanwhile, the solar energy and electric energy can be converted into heat energy at high efficiency and are stored in the phase change material, and the material is a photoelectric composite shape-stabilized phase change material.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials, and specifically relates to a composite shape-setting phase-change material with light-absorbing and conductive properties, which uses an organic phase-change material as an energy-storage matrix, uses a three-dimensional interconnected porous carbon material as a package shape-setting framework, and a preparation method thereof. Background technique [0002] Phase change materials, as an efficient thermal energy storage material, have broad application prospects in building temperature control and energy saving, power peak shaving, solar energy utilization, waste heat recovery, etc., while organic phase change materials (paraffins, fatty acids and fatty alcohols) ) are widely used due to their good cycle performance, no subcooling, and no phase separation. However, organic phase change materials also have disadvantages. The low thermal conductivity makes phase change materials s...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCY02P20/10
Inventor 陈良杰邹如强刘振濮
Owner PEKING UNIV
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