A kind of braidable multi-walled carbon nanotube modified composite phase change material and preparation method thereof

A technology of multi-walled carbon nanotubes and composite phase change materials, applied in heat exchange materials, chemical instruments and methods, wet spinning, etc., can solve the problems of low heat storage density, low thermal conductivity and large volume change, etc. Achieve high thermal conductivity, high tensile strength, and improve heat transfer efficiency

Active Publication Date: 2020-07-10
KANGMINGYUAN GUIZHOU SCI & TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it also has some significant disadvantages, such as low heat storage density, large volume change during solid-liquid phase transition, so it has a certain tendency to separate from the wall of the base material when it solidifies, easy to leak in liquid state, low density and low thermal conductivity, etc.

Method used

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  • A kind of braidable multi-walled carbon nanotube modified composite phase change material and preparation method thereof
  • A kind of braidable multi-walled carbon nanotube modified composite phase change material and preparation method thereof
  • A kind of braidable multi-walled carbon nanotube modified composite phase change material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: A kind of woven multi-wall carbon nanotube modified composite phase change material, comprising multi-wall carbon nanotube modified polypropylene hollow fiber membrane, the inner wall of the multi-wall carbon nanotube modified polypropylene hollow fiber membrane Adsorbed full of paraffin, the membrane cavity is filled with a mixture of paraffin and heat-conducting materials;

[0033] The membrane outer diameter of the multi-walled carbon nanotube modified polypropylene hollow fiber membrane is 1mm, and the porosity is 50%;

[0034] The polypropylene is a homopolypropylene; or a branched high melt strength homopolypropylene with a melt index of 0.5g / 10min;

[0035] The length of the multi-walled carbon nanotubes is 3 μm;

[0036] The heat-conducting material is copper powder whose particle size is below the micron scale;

[0037] The paraffin is solid at room temperature and has 17 carbon atoms;

[0038] The mass ratio of the heat conduction material in th...

Embodiment 2

[0039] Embodiment 2: A kind of braidable multi-wall carbon nanotube modified composite phase change material, including multi-wall carbon nanotube modified polypropylene hollow fiber membrane, the inner wall of the multi-wall carbon nanotube modified polypropylene hollow fiber membrane Adsorbed full of paraffin, the membrane cavity is filled with a mixture of paraffin and heat-conducting materials;

[0040] The membrane outer diameter of the multi-wall carbon nanotube modified polypropylene hollow fiber membrane is 2mm, and the porosity is 65%;

[0041] Described polypropylene is homopolypropylene; Or contains branched high melt strength homopolypropylene, and its melt index is 2g / 10min;

[0042] The length of the multi-walled carbon nanotubes is 11 μm;

[0043] The heat-conducting material is a carbon nanotube with a particle size below the micron scale;

[0044] The paraffin is solid at room temperature and has 26 carbon atoms;

[0045] The mass ratio of the heat-conducti...

Embodiment 3

[0046] Embodiment 3: A kind of braidable multi-wall carbon nanotube modified composite phase change material, comprising multi-wall carbon nanotube modified polypropylene hollow fiber membrane, described multi-wall carbon nanotube modified polypropylene hollow fiber membrane wall Adsorbed full of paraffin, the membrane cavity is filled with a mixture of paraffin and heat-conducting materials;

[0047] The membrane outer diameter of the multi-walled carbon nanotube modified polypropylene hollow fiber membrane is 3mm, and the porosity is 80%;

[0048] Described polypropylene is homopolypropylene; Or contains branched high melt strength homopolypropylene, and its melt index is 4g / 10min;

[0049] The length of the multi-walled carbon nanotubes is 20 μm;

[0050] The heat-conducting material is a mixture of carbon nanotubes, graphene, expanded graphite and copper powder with a particle size below the micron level in a mass ratio of 1:1:1:1;

[0051] Described paraffin is solid at...

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Abstract

The invention discloses a knittable multi-wall carbon nanometer modified composite phase change material and a preparation method thereof. The knittable multi-wall carbon nanometer modified compositephase change material comprises a multi-wall carbon nanometer modified polypropylene hollow fiber membrane, wherein paraffin is fully adsorbed inside the multi-wall carbon nanometer modified polypropylene hollow fiber membrane; a mixture of paraffin and a heat conduction material is filled in a membrane inner cavity. The material has the advantages that the structure is reasonable; the energy storage density is great; the encapsulation quantity is great; the heat conduction coefficient is high; the performance is stable; the production and the preparation are simple; the implementation is easy; the cost is low.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a woven multi-walled carbon nanotube modified composite phase change material and a preparation method thereof. Background technique [0002] With the increasing pressure on energy consumption, the research and development of clean energy such as solar energy, wind energy, and tidal energy shows that people are making great efforts to find alternative energy sources. At the same time, thermal energy, as one of the important ways of energy supply, also occupies a pivotal position in our life. The advocacy of energy conservation and emission reduction directly highlights the huge demand for the development of new and efficient energy storage technologies. At present, thermal energy storage methods mainly include sensible heat storage, chemical reaction heat storage and latent heat storage (phase change energy storage). Among them, phase change energy storage is carried o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/46D01F1/08D01F1/10D06M11/74D06M11/83D06M13/02C09K5/06D01D5/24D01D5/06D01D10/02D02J13/00
CPCC09K5/063D01D5/06D01D5/24D01D10/02D01F1/08D01F1/10D01F6/46D02J13/001D06M11/74D06M11/83D06M13/02
Inventor 王华
Owner KANGMINGYUAN GUIZHOU SCI & TECH DEV CO LTD
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