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Flexible phase change composite material with cross-linked network structure and preparation method thereof

A phase-change composite material and network structure technology, which is applied in the field of flexible phase-change composite materials with a cross-linked network structure and its preparation, can solve the problems of poor flexibility and other problems, and achieve good bending flexibility, good tensile strength, The effect of easy cutting and processing

Active Publication Date: 2021-07-09
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a flexible phase-change composite material with a cross-linked network structure and a preparation method thereof, which is used to solve the problem of dispersion of carbon nanotubes in a phase-change medium that is difficult to solve in the prior art. The existing shape-stable phase-change composite material The technical problem of poor flexibility effect makes the flexible phase change composite material have excellent application prospects in the fields of photothermal energy storage and battery temperature control

Method used

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  • Flexible phase change composite material with cross-linked network structure and preparation method thereof
  • Flexible phase change composite material with cross-linked network structure and preparation method thereof
  • Flexible phase change composite material with cross-linked network structure and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] Example 1 Preparation of a flexible phase-change composite material with a crosslinked network structure

[0033] First, put the solid-liquid phase change material paraffin on a heating platform higher than its melting temperature for melting, then add 20wt.% SBS and 2wt.% CNT powder to the molten paraffin successively, and place the reaction vessel at 180 In a heating pot at ℃, the mixture was sheared by a high-speed shearer to achieve uniform dispersion of SBS and CNTs in the molten paraffin medium. After shearing for 1 hour, a phase change material / polymer mixture with uniformly dispersed carbon nanotubes was obtained.

[0034]Secondly, transfer the mixture to a mechanical stirring device, keep the heating state at 180°C, add 0.2wt.% sulfur powder to the mixture as a chemical cross-linking agent for SBS and CNT, and process it with medium-speed mechanical stirring for 2 hours. After standing and cooling The flexible phase change composite material PW-SBS / CNTs-80 wit...

Embodiment 2

[0036] Example 2 Preparation of a flexible phase-change composite material with a cross-linked network structure

[0037] First, put the solid-liquid phase change material paraffin on a heating platform higher than its melting temperature for melting, then add 15wt.% SBS and 2wt.% CNT powder to the molten paraffin successively, and place the reaction vessel at 180 In a heating pot at ℃, the mixture was sheared by a high-speed shearer to achieve uniform dispersion of SBS and CNTs in the molten paraffin medium. After shearing for 1 hour, a phase change material / polymer mixture with uniformly dispersed carbon nanotubes was obtained.

[0038] Secondly, transfer the mixture to a mechanical stirring device, keep the heating state at 180°C, add 0.2wt.% sulfur powder to the mixture as a chemical cross-linking agent for SBS and CNT, and process it with medium-speed mechanical stirring for 2 hours. After standing and cooling The flexible phase change composite material PW-SBS / CNTs-85 w...

Embodiment 3

[0040] Example 3 Preparation of a flexible phase-change composite material with a cross-linked network structure

[0041] First, put the solid-liquid phase change material paraffin on a heating platform higher than its melting temperature for melting, then add 10wt.% SBS and 2wt.% CNT powder to the molten paraffin successively, and place the reaction vessel at 180 In a heating pot at ℃, the mixture was sheared by a high-speed shearer to achieve uniform dispersion of SBS and CNTs in the molten paraffin medium. After shearing for 1 hour, a phase change material / polymer mixture with uniformly dispersed carbon nanotubes was obtained.

[0042] Secondly, transfer the mixture to a mechanical stirring device, keep the heating state at 180°C, add 0.2wt.% sulfur powder to the mixture as a chemical cross-linking agent for SBS and CNT, and process it with medium-speed mechanical stirring for 2 hours. After standing and cooling The flexible phase change composite material PW-SBS / CNTs-90 w...

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Abstract

The invention discloses a flexible phase change composite material with a cross-linked network structure and a preparation method thereof, which belong to the field of composite materials. Theflexible phase change composite material with a cross-linked network structure comprises a flexible polymer matrix, a carbon nanotube (CNT) crosslinked with the flexible matrix, and a filled solid-liquid phase change material. A three-dimensional cross-linked network based on the flexible polymer / carbon nanotubes is constructed by adding a cross-linking agent for chemical cross-linking reaction, and the chemical cross-linking effect can reduce the interface hindering effect of the CNT and solve the problem of non-uniform dispersion of the CNT. The packaging efficiency of the solid-liquid phase change material is favorably improved, and the mechanical property and the heat storage property of the phase change composite material are remarkably enhanced. The material disclosed by the invention has stable phase change performance and has the functions of temperature regulation and heat energy storage. The material is easy to cut and process, shows good flexibility at room temperature, and has a good application prospect in the field of temperature control of flexible electronic devices.

Description

technical field [0001] The invention belongs to the field of flexible phase change materials, and more specifically relates to a flexible phase change composite material with a crosslinked network structure and a preparation method thereof. Background technique [0002] Shape-stable phase change materials (PCMs), which can release and absorb a large amount of latent heat during the phase transition process, have attracted great interest in many important fields, such as thermal management of flexible electronics and batteries, temperature regulation systems of smart fabrics, and Controlled heat storage applications for energy efficient buildings. These fields have put forward high requirements on the flexibility of phase change materials. However, conventional olefin polymers are mostly used as supporting materials in the preparation of existing shape-stable composite phase change materials: such as high-density polyethylene and polypropylene. This type of polymer has high...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08L91/06C08K3/04C08K3/06C09K5/06
CPCC08L53/02C08L91/06C09K5/063C08K2201/011C08K3/041C08K3/06
Inventor 贾希来胡叠
Owner UNIV OF SCI & TECH BEIJING
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