Unlock instant, AI-driven research and patent intelligence for your innovation.

Graphene modified sodium phosphate dibasic dodecahydrate hydrated phase change heat storage material and preparation method thereof

A hydration technology of disodium hydrogen phosphate dodecahydrate and disodium hydrogen phosphate, which is applied in the field of graphene-modified disodium hydrogen phosphate dodecahydrate hydrated phase-change heat storage materials and its preparation, can solve the problem of low heat storage efficiency and easy Avoid problems such as agglomeration and heat storage density reduction, and achieve the effect of avoiding phase separation, improving latent heat of phase change, and large value of latent heat of phase change

Pending Publication Date: 2022-05-17
韩涛
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] PCMs can be divided into: organic phase change materials, inorganic phase change materials and composite phase change materials. At present, composite phase change materials are the most widely used. Although this type of material is simple in principle and easy to use, it is stable when running in the actual system. Poor performance, while most of the heat capacity is low, and the required materials are easy to agglomerate during use. For example, a phase change heat storage material is disclosed in the Chinese patent application CN201810598104.5. The phase change latent heat of the phase change heat storage material The value is 235-265kJ / kg, and the phase transition temperature is 52-56.5°C. Although the latent heat value of the phase transition has been improved, the phase transition material has serious agglomeration and poor stability in application, which leads to the inability to maintain a constant temperature during the exothermic process of the material. The heat storage density becomes smaller, and the heat storage efficiency is not high

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
  • Graphene modified sodium phosphate dibasic dodecahydrate hydrated phase change heat storage material and preparation method thereof
  • Graphene modified sodium phosphate dibasic dodecahydrate hydrated phase change heat storage material and preparation method thereof
  • Graphene modified sodium phosphate dibasic dodecahydrate hydrated phase change heat storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The invention provides a method for preparing a graphene-modified disodium hydrogen phosphate dodecahydrate hydrated phase-change thermal storage material, comprising the following steps:

[0031] 1) mixing and refining disodium hydrogen phosphate dodecahydrate, graphene and nucleating agent into powder, and melting the powder to obtain graphene-modified disodium hydrogen phosphate dodecahydrate;

[0032] 2) Melt and mix graphene-modified disodium hydrogen phosphate dodecahydrate, thickener and anti-caking agent to obtain a gel-like mixture, which is the graphene-modified disodium hydrogen phosphate dodecahydrate hydrated phase change heat storage material .

[0033] In the present invention, the mixing speed in step 1) is 100-150r / min, and the mixing time is 20-30min; preferably, the mixing speed is 120-140r / min, and the mixing time is 22-28min; Further preferably, the mixing speed is 130r / min, and the mixing time is 25min.

[0034] In the present invention, the part...

Embodiment 1

[0042] 1) Mix 95 parts of disodium hydrogen phosphate dodecahydrate, 3 parts of graphene and 2 parts of sodium acetate trihydrate, and grind the mixture into a powder with a particle size of 100 μm, and place the powder in a container at 60 ° C under water bath conditions Heat for 30 minutes until the powder is completely melted, stir evenly, seal and cool to room temperature to obtain graphene-modified disodium hydrogen phosphate dodecahydrate;

[0043] 2) Heat the modified disodium hydrogen phosphate dodecahydrate obtained in the previous step, 1 part of sodium carboxymethyl cellulose, and 2 parts of activated tricalcium phosphate in a water bath at 90°C for 30 minutes until the mixture is completely melted and stirred evenly , the obtained colloidal mixture is the graphene-modified disodium hydrogen phosphate dodecahydrate hydrated phase change heat storage material.

Embodiment 2

[0045] 1) Mix 96 parts of disodium hydrogen phosphate dodecahydrate, 2 parts of graphene and 2 parts of disodium hydrogen phosphate, and grind the mixture into a powder with a particle size of 110 μm, put the powder in a container at 55°C under water bath conditions Heating for 40 minutes until the powder is completely melted, stirring evenly, sealing and cooling to room temperature to obtain graphene-modified disodium hydrogen phosphate dodecahydrate;

[0046] 2) Heat the modified disodium hydrogen phosphate dodecahydrate obtained in the previous step with 2 parts of polyvinyl alcohol and 0.5 part of calcium carbonate in a water bath at 85°C for 50 minutes until the mixture is completely melted and stirred evenly to obtain a colloidal The mixture is the graphene-modified disodium hydrogen phosphate dodecahydrate hydrated phase-change thermal storage material.

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 diameteraaaaaaaaaa
phase transition enthalpyaaaaaaaaaa
phase transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention provides a graphene modified disodium hydrogen phosphate dodecahydrate hydrated phase change heat storage material and a preparation method thereof, and belongs to the technical field of composite heat storage materials. The disodium phosphate dibasic dodecahydrate is used as a base material, graphene is adopted for modifying the base material, then the nucleating agent, the thickening agent and the anti-blocking agent are compounded, the hydrated phase change heat storage material obtained under the assistance of the auxiliaries has the high phase change heat release enthalpy value, meanwhile, the more excellent anti-blocking performance is achieved, the stability is high, the preparation process is simple, and the preparation method is suitable for industrial production. The obtained product is convenient to package and produce, and is suitable for solar energy storage and electronic device thermal management.

Description

technical field [0001] The invention relates to the technical field of composite thermal storage materials, in particular to a graphene-modified disodium hydrogen phosphate dodecahydrate hydrated phase-change thermal storage material and a preparation method thereof. Background technique [0002] In recent years, under the situation that the problem of the sudden reduction of the total amount of traditional fossil energy has become more and more prominent and the harmful gas emission has caused more and more serious pollution to the environment, how to effectively develop and improve the utilization rate and cleanliness rate of energy at work has been widespread concern around the world. Moreover, due to the strong temporal and spatial characteristics of energy supply and demand, there are problems such as supply-consumption mismatch, unreasonable energy utilization, and massive waste in many energy systems. Therefore, under such circumstances, thermal energy storage materi...

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 韩涛靳秀芝
Owner 韩涛