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Shaped heat storage material and preparation method thereof

A technology of heat storage materials and composite heat storage materials, applied in the field of formed heat storage materials and their preparation, can solve problems such as exacerbating climate change and environmental pollution, achieve high heat storage capacity, rapid charge and discharge capacity, and high convenience of use , the effect of expanding the scope of application

Active Publication Date: 2019-10-08
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional fossil energy is limited, and the use of it is often accompanied by the emission of harmful gases such as carbon dioxide and sulfur dioxide, aggravating climate change and environmental pollution

Method used

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  • Shaped heat storage material and preparation method thereof
  • Shaped heat storage material and preparation method thereof
  • Shaped heat storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A preparation method of reduced graphene oxide / carbon nanotube / paraffin / concrete shaped heat storage material, comprising the following steps:

[0048] Mix 75g carbon nanotube water dispersion (1% by mass) and 150g graphite oxide water dispersion (2% by mass) by mechanical stirring and ultrasonic treatment for 1h, and pass the slurry through the diameter of the peristaltic pump or extrusion pump. It is extruded and dropped into the coagulation bath of cetyl trimethyl ammonium bromide (the mass fraction of cetyl trimethyl ammonium bromide is 1%, the mass fraction of water is 95%, and the mass fraction of ethanol is 95%). 4%) to obtain spherical graphene oxide / carbon nanotube hydrogels, which were washed and freeze-dried to obtain graphene oxide / carbon nanotube aerogels, which were heated in an oven at 200 °C Reduction for 2-4h to obtain reduced graphene oxide / carbon nanotube aerogel; figure 1 SEM image of its cross-section;

[0049] Using the vacuum-assisted vacuum im...

Embodiment 2

[0056] A preparation method of reduced graphene oxide / paraffin / concrete shaped heat storage material, comprising the following steps:

[0057] 240 g of graphite oxide water dispersion (mass fraction of 1%) was extruded into a polyethyleneimine coagulation bath (polyethyleneimine mass fraction of 1 %, the water mass fraction is 99%) to obtain granular graphene oxide hydrogel, which is washed and freeze-dried to obtain graphene oxide aerogel, which is heated and reduced in a 200 ° C oven for 2 h to obtain reduction and oxidation Graphene aerogel; Image 6 SEM image of its cross-section;

[0058] Using the vacuum-assisted vacuum impregnation loading method, the molten paraffin is adsorbed into the reduced graphene oxide foam by capillary action to obtain the reduced graphene oxide / paraffin shaped composite heat storage material; Figure 7 SEM image of its cross-section;

[0059] According to the mixing ratio of cement: river sand: water: graphene oxide = 10:20:4:1, and adding ...

Embodiment 3

[0063] A preparation method of reduced graphene oxide / carbon nanotube / paraffin / concrete shaped heat storage material, comprising the following steps:

[0064] 70g carbon nanotube water dispersion (mass fraction of 1%) and 140g graphite oxide water dispersion (mass fraction of 2%), through peristaltic pump or extrusion pump, squeeze the slurry through a needle with a diameter of 0.5mm to drip. In a polyethyleneimine coagulation bath (the mass fraction of polyethyleneimine is 1% and the mass fraction of water is 99%), granular graphene oxide / carbon nanotube hydrogels are obtained, and graphite oxide is obtained after washing and freeze drying. The graphene / carbon nanotube aerogel was heated and reduced in a 200°C oven for 2 h to obtain reduced graphene oxide / carbon nanotube aerogel;

[0065] Using the vacuum-assisted vacuum impregnation loading method, the melted paraffin is adsorbed into the reduced graphene oxide / carbon nanotube aerogel through capillary action to obtain the r...

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Abstract

The embodiments of the invention relate to the field of heat storage materials, in particular to a shaped heat storage material and a preparation method thereof. The preparation method comprises the steps that a high thermal conductive material is prepared into porous foam or an aerogel, then a heat storage material is loaded to obtain a shaped composite heat storage material with a rapid heat charging and discharging capacity; and then the shaped composite heat storage material is mixed with concrete to be poured and hardened to obtain the shaped heat storage material suitable for various shapes, sizes and occasions, so that the operational performance of the heat storage material is greatly improved, and the application range of the heat storage material is expanded. The preparation method can be used for preparing the shaped heat storage material with high heat storage capacity, the rapid heat charging and discharging capacity, shaping heat storage capacity and high convenience of use, and can be widely applied to the fields such as heat energy storage, heat supply, heating and industrial waste heat recycling.

Description

technical field [0001] The invention relates to the field of heat storage materials, in particular to a shaped heat storage material and a preparation method thereof. Background technique [0002] With the development of society and economy, human's demand for energy is growing rapidly. Traditional fossil energy is limited, and is often accompanied by the emission of harmful gases such as carbon dioxide and sulfur dioxide during use, aggravating climate change and environmental pollution. Improving energy utilization efficiency plays an important role in alleviating energy problems and promoting environmental protection. [0003] Heat storage technology has a wide range of applications in building temperature regulation, heating, industrial waste heat and waste heat utilization, power system peak and valley regulation and other fields, which can effectively improve energy utilization efficiency. Heat storage materials are the key to heat storage technology. Heat storage m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C09K5/14
CPCC09K5/063C09K5/14
Inventor 包晨露刘明禹刘建平王一诺罗天麟
Owner TIANJIN POLYTECHNIC UNIV
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