Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-heat conductivity polyurethane solid-solid phase change material and preparation method thereof

A phase change material, polyurethane technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of slow thermal response rate, limited application fields, low phase change enthalpy, etc., and achieve high latent heat of phase change and thermal stability. The effect of good performance and fast thermal response rate

Active Publication Date: 2018-08-10
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 201210124385.3 invented a polyurethane solid-solid phase change material with high tensile strength and elongation at break and its preparation method, so that the material not only has the characteristics of solid-solid phase transition, but also has high Mechanical strength (2MPa~35MPa) to meet the needs of temperature regulation and control in occasions with high requirements on mechanical properties, but its phase change enthalpy is lower than 85J / g
[0004] In summary, most of the polyurethane solid-solid phase change materials obtained at present have low phase change enthalpy, slow thermal response rate, and the preparation process involves a large amount of toxic and harmful solvents, which limits its application fields.

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
  • High-heat conductivity polyurethane solid-solid phase change material and preparation method thereof
  • High-heat conductivity polyurethane solid-solid phase change material and preparation method thereof
  • High-heat conductivity polyurethane solid-solid phase change material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Expanded graphite is obtained by expanding the oxidized natural graphite sheet at 800°C for 40 minutes in a muffle furnace. After heating and melting polyethylene glycol with a molecular weight of 4000, it was placed in a vacuum oven at 100° C. for 3 hours of vacuum treatment. Add 76.8 parts of polyethylene glycol, 3 parts of expanded graphite, and 1 part of Tween-8 into the reactor, control the temperature of the reactants at 75°C to 80°C, and stir evenly at a stirring rate of 600rpm. Under the conditions of vacuum treatment for 40min; then under the protection of nitrogen, 16.5 parts of 4,4'-diphenylmethane diisocyanate (MDI for short) and 2.7 parts of trihydroxyethylpropane were added dropwise in sequence, and stirring was continued for 3 minutes after the addition was completed. Air bubbles were removed from the above mixture in vacuo. Pour the defoamed mixture into a mold preheated to 50°C, put the mold into an oven at 100°C to solidify for 5 hours, and demould af...

Embodiment 2

[0037] Others of this embodiment are the same as Example 1, and the difference is that 60.3 parts of polyethylene glycol, 0.9 parts of expanded graphite, and 2 parts of polyethylene glycol octylphenyl ether are added to the reactor, and the temperature of the reactant is controlled at 70℃~75℃, stir evenly at a stirring rate of 700rpm, vacuumize at 100℃ for 30min; then, under nitrogen protection, add 30 parts of MDI and 6.8 parts of 1,6-hexanediol (HDO ), continue to stir for 2min after the dropwise addition is completed, and remove the air bubbles in the above-mentioned mixture in a vacuum. Pour the defoamed mixture into a mold preheated to 45°C, put the mold into an oven at 100°C to solidify for 4 hours, and demould after cooling to obtain a high thermal conductivity polyurethane solid-solid phase change material. The latent heat of melting phase transition of the prepared material is 67.5 J / g, and the melting peak temperature is 39.1 °C. The thermal conductivity of the mate...

Embodiment 3

[0039]The rest of this example is the same as that of Example 1, except that polyethylene glycol with a molecular weight of 6000 is selected as the soft segment, heated and melted, and placed in a vacuum oven at 110°C for 4 hours of vacuum treatment. Add 87.4 parts of polyethylene glycol, 2 parts of expanded graphite, and 0.85 parts of silicone-based surfactants into the reaction kettle, control the temperature of the reactants at 80°C to 85°C, stir at a stirring rate of 500rpm, and stir at 120°C Vacuum treatment for 30min at a certain temperature; then, under the protection of nitrogen, 8.72 parts of U-MDI and 1.03 parts of 1,4-butanediol (BDO) were added dropwise in sequence, and stirring was continued for 1 minute after the addition was completed, and the above mixture was removed in a vacuum air bubbles in. The defoamed mixture was poured into a mold preheated to 60°C, and then the mold was put into an oven at 110°C to solidify for 6 hours, and then demoulded after cooling...

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
phase transition temperatureaaaaaaaaaa
strengthaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-heat conductivity polyurethane solid-solid phase change material. The high-heat conductivity polyurethane solid-solid phase change material comprises, by mass, 60-95% ofpolyethylene glycol, 2-30% of isocyanate, 0-9% of a chain extender, 0-5% of a surfactant and 0.5-8% of a heat conduction medium. The invention also discloses a preparation method of the high-heat conductivity polyurethane solid-solid phase change material. The high-heat conductivity phase change energy storage material with the advantages of high phase change latent heat, good heat stability andfast heat response rate is obtained through ingeniously combining adsorption loading, stable state shaping and heat conduction channel construction by physical loading and chemical crosslinking with expanded graphite having a large void ratio as a loading body and the heat conduction medium and a polyurethane material having a phase change function as a matrix, and the application prospect of thephase change energy storage material in fields of aviation, industrial heat storage, construction and solar energy storage is widened.

Description

technical field [0001] The invention relates to a polymer solid-solid phase change material with fast thermal response rate and a preparation method thereof, in particular to a high thermal conductivity polyurethane solid-solid phase change material using expanded graphite as a heat conduction medium and a preparation method thereof. Background technique [0002] As people pay more attention to energy issues, the importance of energy storage technology has become increasingly prominent. When the phase change material changes its phase, it is accompanied by the release or absorption of relatively large energy. Using this feature to store energy can make full use of discontinuous and unstable heat to adjust and control the temperature of the working source or the surrounding environment of the phase change material. It is an environmentally friendly technology that improves energy utilization efficiency. This technology has attractive application prospects in energy-saving fi...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08K7/24C09K5/02
CPCC08G18/3206C08G18/4833C08G18/6674C08G18/6677C08K7/24C09K5/02
Inventor 余雪江刘涛陈可平雷雅杰田春蓉孙素明梁书恩
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com