Composite phase-change material and preparation method thereof

A technology of composite phase change materials and mixtures, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of high degree of subcooling, poor thermal conductivity, etc., to solve poor thermal conductivity, high degree of supercooling, The effect of excellent electrical conductivity

Pending Publication Date: 2020-12-25
YINLONG ENERGY CO LTD
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a composite phase change material and its preparation method to solve the problems of high undercooling and poor thermal conductivity of erythritol-based phase change materials in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite phase-change material and preparation method thereof
  • Composite phase-change material and preparation method thereof
  • Composite phase-change material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] In another typical embodiment of the present application, a method for preparing the aforementioned composite phase change material is provided, the preparation method comprising: step S1, mixing materials including erythritol, graphene oxide and a solvent , to obtain a mixture; Step S2, drying and homogenizing the mixture to obtain a composite phase change material.

[0027] Graphene oxide has a layered structure, and contains a large number of oxygen-containing functional groups on the basal plane and edge of the layered structure, such as hydroxyl, carboxyl, and epoxy groups. The presence of these oxygen-containing functional groups makes graphene oxide negatively charged, while red Brought alcohol contains a large number of alcoholic hydroxyl groups. During the formation of the above-mentioned composite phase change material, the solid erythritol, graphene oxide and solvent are mixed to form a uniformly dispersed mixture, so that erythritol, oxidized Graphene can be...

Embodiment 1

[0039] Weigh about 4g of erythritol (ET) and 0.2g of graphene oxide (GO, with a particle size of 300nm) and place it in a beaker (the mass ratio of graphene oxide and erythritol is 1:20). Dissolve erythritol and graphene oxide in a mixed solvent (100 mL) with water, wherein the volume ratio of ethanol to water is 6:1, and the ultrasonic time is 6 h at an ultrasonic frequency of 200 Hz to obtain a mixture. The mixture was dried in a constant temperature oven at 80° C. for 8 hours to obtain a dried mixture, which was ground to obtain ET / GO composite phase change material 1 with a particle size of 400 nm.

[0040] The thermal performance test DSC curve of this ET / GO composite phase change material 1 is as follows figure 1 As shown, when from figure 1 The relevant thermodynamic parameters of the ET / GO composite phase change material 1 can be obtained as shown in Table 1, and the thermal conductivity of the ET / GO composite phase change material 1 is as follows figure 2 As shown,...

Embodiment 2

[0044] The difference between Example 2 and Example 1 is that the quality of erythritol is changed so that the mass ratio of graphene oxide and erythritol is 1:16, and finally ET / GO composite phase change material 2 is obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides a composite phase change material and a preparation method thereof. The composite phase-change material is prepared from the following components in percentage by mass: 94 to 96percent of erythritol and 4 to 6 percent of graphene oxide. The liquid containing the graphene oxide plays a role of a nucleating agent while increasing the interfacial surface area, so that the liquid containing the erythritol is induced to be subjected to anisotropic nucleation, and the erythritol is induced to form a 'seed crystal' similar to an erythritol solid structure on the surface of thegraphene oxide. Meanwhile, the graphene oxide enables the degree of freedom of the erythritol to be reduced, so that the supercooling degree of the composite phase-change material is reduced. In addition, the state of the composite phase-change material before shaping is unstable when the content of the graphene oxide heat conduction material is too low, and the composite phase change material isprone to cracking when the content of the graphene oxide heat conduction material is too high, so that the composite phase-change material provided by the invention can solve the problems of high supercooling degree and poor heat-conducting property of an erythritol-based phase-change material.

Description

technical field [0001] The invention relates to the technical field of phase change materials, in particular to a composite phase change material and a preparation method thereof. Background technique [0002] Energy is the basis for human survival and development. With the rapid development of science and technology, people's demand for energy is increasing day by day. However, the resources of traditional fossil fuels are limited, and the consumption of fossil energy has brought many environmental problems. Therefore, exploring and researching new energy materials has become an important global research topic. [0003] In recent years, as a new type of environmentally friendly heat storage material, phase change materials have been in a very active research field in energy utilization research, such as in the fields of solar thermal utilization, power grid peak shaving and valley filling, waste heat recovery, aerospace and battery thermal management, etc. It has broad app...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09K5/06C09K5/14
CPCC09K5/063C09K5/14
Inventor 舒梨张正郭华彬詹世英蔡惠群
Owner YINLONG ENERGY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap