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

Expanded graphite-binary organic low-temperature nano phase change energy storage material and preparation method and application thereof

A technology of expanded graphite and energy storage materials, applied in the field of expanded graphite-binary organic low-temperature nano phase change energy storage materials and its preparation, can solve the problem of reducing the latent heat of phase change of energy storage materials, phase change materials and metal foams cannot be 100% Fusion, weakened thermal conductivity and other issues, to achieve the effect of shortening the condensation-thawing time, large energy storage density and latent heat of phase change, and not easy to leak

Pending Publication Date: 2020-09-15
YUNNAN NORMAL UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above two methods can greatly improve the thermal conductivity of energy storage materials, but there are also some shortcomings: although adding nano-metal particles can increase the thermal conductivity of phase change materials, energy storage materials and thermal conductivity materials have different densities, and must be added during use. The dispersant makes the thermal conductive material fully dispersed, but with the cycle of energy storage and energy release, the function of the dispersant will gradually fail, resulting in layering between the energy storage material and the thermal conductive material due to different densities, and the thermal conductivity is gradually weakened. The added dispersant It also reduces the energy storage density and reduces the latent heat of phase change of energy storage materials; while the cost of metal foam is high, and the pore size of metal foam is large, and the phase change material is prone to leakage during the melting process, resulting in a decrease in the latent heat of phase change, and the phase change The material cannot be 100% fused with the metal foam, which further reduces the energy storage density

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh 0.6g of expanded graphite, add ethylene glycol to cover the expanded graphite, ultrasonically treat it at 45HZ for 30min, then heat it in a constant temperature water bath at 70°C for 1h, and finally add deionized water to clean it and put it into the blast After completely drying at 110°C in a drying oven, take it out and let it cool down to room temperature naturally;

[0025] (2) Take by weighing 19.4g n-tetradecane and dodecyl alcohol, wherein the molar mass of n-tetradecane and dodecyl alcohol is 0.737:0.263, add in the beaker, then mix the two with a high-shear dispersing emulsification homogenizer Fully stir for 4 minutes under the condition of 10000r / min to form a binary organic low-temperature nano phase change energy storage material;

[0026] (3) Add the binary organic low-temperature nano phase change energy storage material prepared in step (2) dropwise to the expanded graphite treated in step (1) at normal temperature and pressure to form expande...

Embodiment 2

[0029] (1) Weigh 1.0g of expanded graphite, add ethylene glycol to cover the expanded graphite, ultrasonically treat it at 45HZ for 30min, then heat it in a constant temperature water bath at 70°C for 1h, and finally add deionized water to clean it and put it into the blast After completely drying in a drying oven at 120°C, take it out and let it cool down to room temperature naturally;

[0030] (2) Take by weighing 19.0g n-tetradecane and dodecyl alcohol, wherein the molar mass of n-tetradecane and dodecyl alcohol is 0.737:0.263, add in the beaker, then use high-shear dispersion emulsification homogenizer to mix the two Fully stir for 4 minutes under the condition of 11000r / min to form a binary organic low-temperature nano phase change energy storage material;

[0031] (3) Add the binary organic low-temperature nano phase change energy storage material prepared in step (2) dropwise to the expanded graphite treated in step (1) at normal temperature and pressure to form expande...

Embodiment 3

[0034] (1) Weigh 1.4g of expanded graphite, add ethylene glycol to cover the expanded graphite, ultrasonically treat it at 45HZ for 30min, then heat it in a constant temperature water bath at 70°C for 1h, and finally add deionized water to clean it and put it into the blast After being completely dried in a drying oven at 130°C, take it out and let it cool down to room temperature naturally;

[0035] (2) Take by weighing 18.6g n-tetradecane and dodecyl alcohol, wherein the molar mass of n-tetradecane and dodecyl alcohol is 0.737:0.263, add in the beaker, then mix the two with a high-shear dispersion emulsification homogenizer Fully stir for 4 minutes under the condition of 12000r / min to form a binary organic low-temperature nano phase change energy storage material;

[0036] (3) Add the binary organic low-temperature nano phase change energy storage material prepared in step (2) dropwise to the expanded graphite treated in step (1) at normal temperature and pressure to form ex...

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
phase transition enthalpyaaaaaaaaaa
phase transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention discloses an expanded graphite-binary organic low-temperature nano phase change energy storage material and a preparation method and application thereof. The preparation method comprisesthe following steps of: stirring an n-tetradecane and dodecanol organic phase change material through a high-shear dispersion emulsification homogenizer to form a binary organic low-temperature nanophase change energy storage material; adding the binary organic low-temperature nano phase-change energy storage material into expanded graphite at normal temperature and normal pressure to obtain a composite material, and measuring the heat conductivity coefficient of the energy storage material to be 2.027-2.407 W / (m.K) by using a heat conductivity coefficient instrument; and measuring the phasechange temperature of the energy storage material by a differential scanning calorimeter to be 3.8-4.5 DEG C and the phase-change latent heat to be 201.8-210.2 J / g. The expanded graphite only plays arole in heat conduction in the energy storage process, and as the expanded graphite-binary organic low-temperature nano phase-change energy storage material is good in compatibility, the degree of supercooling hardly exists, and the melting process and the solidification process are shortened.

Description

technical field [0001] The invention relates to the technical field of composite functional materials, in particular to an expanded graphite-binary organic low-temperature nano phase change energy storage material and its preparation method and application. Background technique [0002] Phase change material technology is a high-tech based on phase change energy storage materials. Because of its high energy storage density and stable output temperature and energy, it has the incomparable advantages of sensible heat storage. Therefore, the research of phase change materials It is becoming more and more widespread, and some phase change materials have also been commercialized, but people have not made breakthroughs in the research on the stability and reliability of phase change materials with high latent heat. At present, organic phase change materials and inorganic phase change materials Materials are widely used. Inorganic phase change materials have high latent heat densit...

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): C09K5/06
CPCC09K5/063Y02E60/14
Inventor 李明赵乐李国良胡承志
Owner YUNNAN NORMAL UNIV
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