Formed heat storage material and preparation method thereof

A heat storage material and composite heat storage material technology, applied in the field of forming heat storage materials and their preparation, can solve problems such as aggravating climate change and environmental pollution, achieve high heat storage capacity and rapid charge and release capacity, improve service performance, The effect of high heat storage capacity

Active Publication Date: 2020-08-14
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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  • Formed heat storage material and preparation method thereof
  • Formed heat storage material and preparation method thereof
  • Formed 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 forming heat storage material, comprising the steps of:

[0048] 75g carbon nanotube aqueous dispersion (mass fraction is 1%) and 150g graphite oxide aqueous dispersion (mass fraction is 2%) were mixed by mechanical stirring and ultrasonic treatment for 1h, and the slurry was passed through a diameter by a peristaltic pump or an extrusion pump. Extrude from a needle of 0.5 mm, drip into the cetyltrimethylammonium bromide coagulation bath (the mass fraction of cetyltrimethylammonium bromide is 1%, the massfraction of water is 95%, ethanol The mass fraction is 4%), the graphene oxide / carbon nanotube hydrogel of globular shape is obtained, after washing and freeze-drying, the graphene oxide / carbon nanotube aerogel is obtained, which is heated in a 200°C oven Reduction for 2-4h to obtain reduced graphene oxide / carbon nanotube airgel; figure 1 Its cross-sectional SEM image;

[0049] Using a v...

Embodiment 2

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

[0057] With 240g graphite oxide aqueous dispersion (mass fraction is 1%), by peristaltic pump or extruding pump, the slurry is extruded to the polyethylenimine coagulation bath (polyethyleneimine mass fraction is 1 %, the water mass fraction is 99%), the granular graphene oxide hydrogel is obtained, after washing and freeze-drying, the graphene oxide airgel is obtained, and it is heated and reduced in an oven at 200°C for 2h to obtain the reduced oxidation Graphene airgel; Figure 6 Its cross-sectional SEM image;

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

[0059] According to the mix ratio of cement: ...

Embodiment 3

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

[0064] With 70g carbon nanotube aqueous dispersion (mass fraction is 1%) and 140g graphite oxide aqueous dispersion (mass fraction is 2%), by peristaltic pump or extrusion pump, the slurry is squeezed and dripped by a needle with a diameter of 0.5mm to In polyethyleneimine coagulation bath (polyethyleneimine mass fraction is 1%, and water mass fraction is 99%), obtains granular graphene oxide / carbon nanotube hydrogel, obtains graphite oxide after washing, freeze-drying ene / carbon nanotube aerogel, which was heated and reduced in an oven at 200°C for 2 hours to obtain reduced graphene oxide / carbon nanotube aerogel;

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

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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 increasing rapidly. Traditional fossil energy is limited, and its use is often accompanied by the emission of harmful gases such as carbon dioxide and sulfur dioxide, 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 is widely used in building temperature regulation, heating, industrial waste heat and waste heat utilization, power system peak-valley regulation, etc., which can effectively improve energy utilization efficiency. Heat storage materials are the key to heat storage technology. Heat storage materials can store or release hea...

Claims

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Application Information

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Patent Type & Authority Patents(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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