Phase change energy storage material with skin-core fiber structure and preparation method thereof

A phase change energy storage material, skin-core fiber technology, applied in the direction of heat exchange materials, fiber processing, fiber chemical characteristics, etc., can solve the problem of low phase change enthalpy, poor thermal stability and thermal conductivity of materials, and mechanical properties. Low problems, to achieve the effect of improving preparation efficiency, improving energy storage efficiency, and high thermal conductivity

Active Publication Date: 2019-04-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The existing energy storage fiber materials have the problems of low phase change enthalpy, relatively low mechanical properties, and poor thermal stability and thermal conductivity of the material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 0.5g of polyacrylonitrile to 5ml of N,N dimethylformamide, and then add 0.05g of ZnO particles after it is completely dissolved, and mix well to obtain an oil phase solution; add 0.1g of CaCl 6H 2 O was added to 1ml of deionized water to obtain a water phase solution; the water phase solution was added to the oil phase solution, and 0.01g of Span 80 was added, and the emulsion was passed through a high-speed homogeneous disperser for 10 minutes to obtain a water-in-oil emulsion. Then, the water-in-oil emulsion is electrospun to obtain a composite fiber material with a skin-core structure; the composite fiber material with a skin-core structure is freeze-dried for 12 hours, and the core layer moisture of the composite fiber material with a skin-core structure is removed to obtain a hollow fiber material; The obtained hollow fiber material was pre-oxidized (200°C, 10h) and carbonized (550°C, 24h) in a tube furnace under a nitrogen atmosphere to obtain a phase-change en...

Embodiment 2

[0035] Add 0.8g of polyacrylonitrile to 10ml of N, N dimethylformamide, and then add 0.1g of TiO after completely dissolving 2 Particles, fully mixed and stirred evenly to obtain an oil phase solution; 1g of SrCl 2 ·6H 2O was added to 5ml of deionized water to obtain a water phase solution; the water phase solution was added to the oil phase solution, and 0.1 g of alkyl sodium sulfate was added, and the emulsion was passed through a high-speed homogeneous disperser for 10 minutes to obtain a water-in-oil emulsion , and then the water-in-oil emulsion was electrospun to obtain a composite fiber material with a skin-core structure; the composite fiber material with a skin-core structure was freeze-dried for 24 hours to remove the core moisture of the composite fiber material with a skin-core structure to obtain a hollow fiber material ; The obtained hollow fiber material undergoes pre-oxidation (400°C, 0.5h) and carbonization (1100°C, 1h) processes in a tube furnace under a nitr...

Embodiment 3

[0038] Add 0.7g of polyacrylonitrile to 7ml of N, N dimethylformamide, and then add 0.3g of SnO after it is completely dissolved. 2 Granules, fully mixed and stirred to obtain an oil phase solution; 2ml of deionized water was used as the water phase solution; the water phase solution was added to the oil phase solution, and 0.05g Tween 80 was added, and the emulsion was passed through a high-speed homogeneous disperser for 10 minutes , to obtain a water-in-oil emulsion, and then the water-in-oil emulsion is electrospun to obtain a composite fiber material with a skin-core structure; the composite fiber material with a skin-core structure is freeze-dried for 20 hours, and the core of the composite fiber material with a skin-core structure is removed layer of moisture to obtain hollow fiber materials; the obtained hollow fiber materials undergo pre-oxidation (300°C, 5h) and carbonization (800°C, 8h) processes in a tube furnace under a nitrogen atmosphere to obtain a phase transit...

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Abstract

The invention belongs to the field of phase change energy storage materials, and discloses a phase change energy storage material with a skin-core fiber structure and a preparation method thereof. Polyacrylonitrile is dissolved in an organic solvent, the phase change energy storage materials are added into the solvent and uniformly mixed, and an oil phase solution is obtained. Water-soluble phasechange materials are dissolved in deionized water or the deionized water is directly used as an aqueous phase solution; the aqueous phase solution is added into the oil phase solution, an emulsifyingagent is added for homogenization and dispersion, oil in water emulsion is obtained, and a composite fiber material with the skin-core structure is obtained through electrostatic spinning; a hollow fiber material is obtained through freeze-drying; finally pre-oxidation and carbonization treatment are performed in an inert atmosphere, and the phase change energy storage material with the skin-corefiber structure is obtained. The fiber preparation technology is combined with the high-performance phase change material, the phase change energy storage material has higher phase change enthalpy and reversible capacity, and multi-scene application of the phase change energy storage material is achieved.

Description

technical field [0001] The invention belongs to the field of phase-change energy storage materials, and in particular relates to a phase-change energy storage material with a skin-core fiber structure and a preparation method thereof. Background technique [0002] As the traditional fossil energy such as coal and petroleum is not inexhaustible, coupled with the aggravation of the global greenhouse effect and the rise of energy prices, how to improve the utilization rate of energy and accelerate the use of new green energy It is an urgent need to solve the global energy problem. In addition, energy saving and emission reduction is also a necessary means to deal with climate change caused by energy issues. The development and manufacture of more efficient and cheaper energy storage technology is a very important choice to solve the energy crisis. Today's energy storage technology mainly It is divided into mechanical energy storage system, electrical energy storage system and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22D01F1/08D01F1/10D01D5/34D01D5/00D01D5/24D01D10/06C09K5/06
CPCC09K5/06D01D5/003D01D5/24D01D5/34D01D10/06D01F1/08D01F1/10D01F9/22
Inventor 严玉蓉黄楚云林超邱志明吴松平李伟培
Owner SOUTH CHINA UNIV OF TECH
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