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Porous carbon-based shaped composite phase-change material, preparation and application

A composite phase change material and phase change material technology, which is applied in the field of preparation of porous carbon-based shaped composite phase change materials, can solve problems such as leakage, flow, and liquid state, and achieve simple raw materials, easy access to raw materials, and low equipment requirements Effect

Active Publication Date: 2020-02-21
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solid-liquid phase change material will become liquid during the phase change process, so there are problems of flow and leakage.

Method used

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  • Porous carbon-based shaped composite phase-change material, preparation and application

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Experimental program
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Effect test

Embodiment 1

[0026] (1) Take 1.5g of sucrose and 1.0g of sodium bicarbonate into a ball mill jar, and mill at a speed of 300r / min for 30min. The mixed product was ignited with 1.5mL ethanol, and the porous carbon precursor was obtained by burning; 2 Under the atmosphere, the temperature was raised to 800° C., and the temperature was kept constant for 3 hours to obtain porous carbon.

[0027] (2) Add an appropriate amount of paraffin to the product in (1), put it in a vacuum oven, set the temperature at 80°C, and soak for 2 hours.

[0028] (3) Put the product obtained in (2) into an oven to remove unimpregnated paraffin, and finally obtain a porous carbon-based shaped composite phase change material.

[0029] The porous carbon-based shaped composite phase change material of the present invention is a black lump, wherein the mass percentage of paraffin wax accounts for about 75%, and its differential scanning calorimetry curve is as follows: figure 1 shown. In the process of preparing the...

Embodiment 2

[0031] (1) Take 1.5g of sucrose and 1.5g of sodium bicarbonate into a ball mill jar, and mill at a speed of 300r / min for 30min. The mixed product was ignited with 2mL ethanol, and the porous carbon precursor was obtained by burning; 2 Under the atmosphere, the temperature was raised to 800° C., and the temperature was kept constant for 3 hours to obtain porous carbon.

[0032] (2) Add an appropriate amount of paraffin to the product in (1), put it in a vacuum oven, set the temperature at 80°C, and soak for 2 hours.

[0033] (3) Put the product obtained in (2) into an oven to remove unimpregnated paraffin, and finally obtain a porous carbon-based shaped composite phase change material.

[0034] The porous carbon-based shaped composite phase-change material of the present invention is a black lump, wherein the paraffin wax accounts for about 70% by mass. In the process of preparing the composite phase change material, the complicated process of preparing porous carbon template...

Embodiment 3

[0036] (1) Take 1.5g of sucrose and 1.0g of sodium bicarbonate into a ball mill jar, and mill at a speed of 300r / min for 30min. The mixed product was ignited with 1.5mL ethanol, and the porous carbon precursor was obtained by burning; 2 Under the atmosphere, the temperature was raised to 700° C., and the temperature was kept constant for 2 hours to obtain porous carbon.

[0037] (2) Add an appropriate amount of paraffin to the product in (1), put it in a vacuum oven, set the temperature at 80°C, and soak for 2 hours.

[0038] (3) Put the product obtained in (2) into an oven to remove unimpregnated paraffin, and finally obtain a porous carbon-based shaped composite phase change material.

[0039]The porous carbon-based shaped composite phase-change material of the present invention is a black lump, wherein the paraffin wax accounts for about 65% by mass. In the process of preparing the composite phase change material, the complicated process of preparing porous carbon templat...

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Abstract

The invention discloses a preparation method of synthesizing a porous carbon-based shaped composite phase-change material capable of being used for heat storage through high-temperature calcination and vacuum impregnation. According to the method, sucrose and sodium bicarbonate are used as raw materials, a porous carbon supporting carrier is prepared through a high-temperature calcination method,then an organic phase-change material is added, the phase-change material is loaded into porous carbon through a vacuum heating impregnation method, and finally the porous carbon-based shaped composite phase-change material is prepared, wherein in the preparation process of the porous carbon carrier, holes of different structures can be prepared by changing the ratio of the sucrose to the sodium bicarbonate, and then shaped composite phase-change materials with different loads are obtained after vacuum impregnation. According to the composite phase-change material synthesized through the method, the porous carbon and the phase-change material are combined through a physical relation, so that the stability is good, and the material can be used for heat storage and waste heat recovery of industrial equipment, solar photo-thermal conversion and other aspects.

Description

technical field [0001] The invention belongs to the field of composite phase change materials, in particular to a preparation method for synthesizing uniform porous carbon-based shaped composite phase change materials that can be used as heat storage by high-temperature calcination and vacuum impregnation. Background technique [0002] Energy shortage is a major problem that needs to be solved urgently along with social development. People hope to face this challenge by improving the utilization rate of traditional energy and developing and utilizing new energy. Thermal energy is an important aspect of the energy field, how to store and utilize thermal energy has always been a hot spot of concern. Among them, latent heat energy storage has a higher energy storage density, so it is favored by researchers. The core of latent heat storage is phase change materials. [0003] Phase change materials manage heat energy by absorbing or releasing heat energy during the phase change...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063Y02P20/10
Inventor 史全孙克衍
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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