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Light-heat energy conversion and heat energy storage shape-stabilized phase-change compound material and production method thereof

An energy conversion and thermal energy storage technology, applied in heat exchange materials, heat exchange equipment, chemical instruments and methods, etc., can solve the problems of lack of energy conversion capability, easy leakage, low thermal conductivity, etc., and achieve excellent shape stability, High phase change enthalpy value, the effect of high phase change enthalpy value

Active Publication Date: 2019-06-07
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic solid-liquid phase change materials also have certain problems, such as low thermal conductivity, easy leakage during use, lack of energy conversion ability, etc.

Method used

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  • Light-heat energy conversion and heat energy storage shape-stabilized phase-change compound material and production method thereof
  • Light-heat energy conversion and heat energy storage shape-stabilized phase-change compound material and production method thereof
  • Light-heat energy conversion and heat energy storage shape-stabilized phase-change compound material and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A photo-thermal energy conversion and thermal energy storage shape-changing composite material, prepared according to the following steps:

[0043] ① Put 1gTi 3 AlC 2 Dissolve in 8mL of water to obtain a precursor solution, dissolve 1g of hydrofluoric acid in 10mL of water to obtain a hydrofluoric acid solution, mix the precursor solution and hydrofluoric acid solution for 3 days, and obtain stacked Ti 3 C 2 ;

[0044] ②The stacked Ti obtained after processing 3 C 2 Centrifuge and wash with deionized water to pH = 7, dry, mix with dimethyl sulfoxide (hereinafter referred to as DMSO), the mixing ratio is 1g:12mL, stir magnetically at room temperature for 18h, centrifuge and pour off the supernatant to obtain DMSO intercalated multilayer Ti 3 C 2 precipitation;

[0045] ③Multilayer Ti intercalated with DMSO 3 C 2 The precipitate was mixed with deionized water at a ratio of 1g:300mL, ultrasonicated for 5h, centrifuged to discard the supernatant, and the precipita...

Embodiment 2

[0049] Mix polyethylene glycol 6000 with Ti 3 C 2 The mass ratio of the nanosheets is changed to 7:3, and Ti is obtained by compounding 3 C 2 Nanosheet composite shape-setting phase change material, other conditions are consistent with Example 1. The phase change enthalpy of the obtained composite shape-setting phase change material can still reach about 154 J / g, and has the same high thermal stability as that of Example 1.

Embodiment 3

[0051] Mix polyethylene glycol 6000 with Ti 3 C 2 The mass ratio of nanosheets is changed to 9:1, and Ti is obtained by compounding 3 C 2 Nanosheet composite shape-setting phase change material, other conditions are consistent with Example 1. The phase change enthalpy of the obtained composite shape-setting phase change material can still reach more than 177 J / g, and has the same high thermal stability as that of Example 1.

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Abstract

The invention discloses a light-heat energy conversion and heat energy storage shape-stabilized phase-change compound material, and belongs to the field of functional compound materials. The light-heat energy conversion and heat energy storage shape-stabilized phase-change compound material is composed of a supporting material and an organic phase-change material, wherein a mass ratio of the supporting material to the organic phase-change material is (3 to 1) to (7 to 9), the supporting material is in a slice-layer shape, and layers of the supporting material are evenly filled with the organicphase-change material to form a laminated stacked structure; the supporting material is nanosheets of Ti2C or Ti3C2 or Ti3CN or V2C or Nb2C or TiNbC or Nb4C3 or Ta4C3 or (Ti0.5Nb0.5)2C or (V0.5Cr0.5)3C2; and the organic phase-change material is paraffin or fatty acid or aliphatic ester or alcohol. The compound material has a high phase change enthalpy value and excellent shape stability and heatstability, and has wide prospects in the field of heat energy storage and use.

Description

technical field [0001] The invention belongs to the field of functional composite materials, and in particular relates to a photo-thermal energy conversion and thermal energy storage shape-changing composite material and a preparation method thereof. Background technique [0002] Organic solid-liquid phase change materials (PCM), as latent heat storage materials, can store and release large amounts of energy within a small range of temperature changes. PCM can store thermal energy from the surrounding environment, for example, waste heat generated by vehicles, electronic products, etc. In particular, PCM can convert sunlight into heat and store it. However, organic solid-liquid phase change materials also have certain problems, such as low thermal conductivity, easy leakage during use, and lack of energy conversion capabilities. [0003] MXenes is a two-dimensional transition metal carbon / nitride, which has surface hydrophilicity, metal conductivity and excellent electroch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C09K3/00
CPCC09K5/06C09K3/00C09K5/063F28F2255/06F28F2255/20
Inventor 唐炳涛樊晓乔刘璐张宇昂张淑芬
Owner DALIAN UNIV OF TECH
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