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Stable-shape nanocomposite phase change material and preparation method thereof

A nano-composite and phase-change material technology, applied in the field of shape-stable nano-composite phase-change materials and their preparation, can solve the problems of increased use cost, high economic cost, reduced thermal performance, etc., and achieves high phase change enthalpy and thermal stability. Good performance and low cost

Inactive Publication Date: 2016-08-24
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its application is limited due to its low latent heat of phase change and high economic cost.
The advantages of solid-liquid phase change heat storage materials such as good economy and wide range of sources allow them to be popularized and applied quickly, but their severe supercooling and phase separation will reduce thermal performance, and long-term use will lead to leakage, environmental pollution and other problems , these will increase its use cost, so it needs to be compounded with other materials to improve the overall performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) The whole reaction was carried out in an ice-water bath. Nitrogen gas was passed through deionized water to remove oxygen for about 30 minutes, 0.3g of refined acrylamide and 0.7g of dried PEG2000 were added, magnetically stirred for 15 minutes to fully dissolve, and 0.11g of Lithium diatomaceous earth (Laponite), magnetic stirring 20min;

[0027] 2) Add 0.03g of initiator potassium persulfate (KPS), dissolve and add 2.4μL of undiluted catalyst N,N,N',N'-tetramethyldiethylamine (TEMED), and inject it immediately after reacting for 20s For a good mold, react at room temperature for 48 hours, then vacuum dry for 24 hours.

Embodiment 2

[0029] 1) The whole reaction was carried out in an ice-water bath. Nitrogen gas was passed through deionized water to remove oxygen for about 30 minutes. Add 0.2 g of refined acrylamide and 0.8 g of dried PEG2000. Stir magnetically for 15 minutes to fully dissolve it. Add 0.11 g Lithium diatomaceous earth (Laponite), magnetic stirring 20min;

[0030] 2) Add 0.02g of initiator potassium persulfate (KPS), dissolve and add 1.6μL of undiluted catalyst N,N,N',N'-tetramethyldiethylamine (TEMED), and inject it immediately after reacting for 20s For a good mold, react at room temperature for 48 hours, then vacuum dry for 24 hours.

Embodiment 3

[0032] 1) The whole reaction was carried out in an ice-water bath. Nitrogen gas was passed through deionized water to remove oxygen for about 30 minutes. Add 0.3 g of refined acrylamide and 0.7 g of dried PEG2000. Stir magnetically for 15 minutes to fully dissolve it. Add 0.25 g Lithium diatomaceous earth (Laponite), magnetic stirring 20min;

[0033] 2) Add 0.03g of initiator potassium persulfate (KPS), dissolve and add 2.4μL of undiluted catalyst N,N,N',N'-tetramethyldiethylamine (TEMED), and inject it immediately after reacting for 20s For a good mold, react at room temperature for 48 hours, then vacuum dry for 24 hours.

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PUM

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Abstract

The invention relates to a stable-shape nanocomposite phase change material and a preparation method thereof. The stable-shape nanocomposite phase change material mainly comprises the following components: polyethylene glycol (PEG), acrylamide (AM), clay, an initiator and a catalyst; the components are proportionally added; and a novel nanocomposite phase change material is prepared by an in-situ polymerization method, wherein the PEG is used as a phase change material, and a three-dimensional network composed of polyacrylamide (PAM) and clay serves as a support. The phase change material has relatively high latent heat of phase change, proper phase change temperature, relatively high heat conductivity coefficient and relatively good heat stability. The novel phase change material overcomes the shortcomings of frequent leakage and low heat conductivity coefficient in the phase change of traditional phase change materials; the material can keep a stable shape without encapsulation; and the preparation method is simple while the cost is low. The nanocomposite phase change material is expected to be applied to the fields such as energy-saving materials in buildings, solar energy storage and release and heat-accumulation temperature control clothing.

Description

technical field [0001] The invention relates to a polyethylene glycol / polyacrylamide / clay nanocomposite shape-setting phase change material, specifically a shape-stable solid-solid phase change material with suitable phase transition temperature, high latent heat of phase transition, The invention relates to a phase change material with fast heat conduction and good thermal stability, and relates to a preparation method of the material. Background technique [0002] Phase change material (Phase Change Material, PCM) is a latent energy storage material with high energy storage density, good chemical stability, non-toxic and relatively mature research technology. It absorbs or releases heat from the outside to realize the functions of heat storage and release, so as to achieve the purpose of adjusting the temperature of the surrounding environment and saving energy. [0003] Traditional solid-solid phase change materials mainly undergo reversible absorption and heat release t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/02
Inventor 付维贵吴春辉林贵德梁丽潘靖王桢陈莉
Owner TIANJIN POLYTECHNIC UNIV
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