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Compounded phase change heat storage material and preparation method thereof

A heat storage material and composite phase change technology, applied in the field of composite materials, can solve the problems of small specific heat of heat storage materials, changes in thermal resistance, and reduced heat storage performance, so as to achieve small changes in thermal resistance, reduce thermal resistance, and improve The effect of heat storage performance

Inactive Publication Date: 2017-11-10
常州苏达欧包装材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problem that the traditional heat storage material has a small specific heat, the shrinkage and expansion of the volume during the phase change process will lead to a change in thermal resistance and reduce its heat storage performance, and a composite phase change material is provided. Heat storage material and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First, weigh 3g of expandable graphite, put it into a pulverizer and crush it, pass through a 50-mesh sieve, put the sieved expandable graphite powder in a drying oven, and dry it to constant weight at 110°C, then put the dried expandable graphite powder Graphite powder is transferred into a muffle furnace, heated to 900°C, held for 30 seconds, cooled to room temperature to obtain expanded graphite; after mixing expanded graphite with 0.05g of multi-walled carbon nanotubes, add 120mL of 70% ethanol solution In the process, stir at 400r / min for 15min, then disperse with 300W ultrasonic wave for 8h, then vacuum filter, wash the filter cake with deionized water for 3 times, put the washed filter cake in a vacuum drying oven, and dry it at 110°C to constant weight to obtain composite nano-expanded graphite; then weigh 1.5g trimethylolethane, 8.5g stearic acid, and 1.5g composite nano-expanded graphite, put them into a ball mill, add 8mL acetone to the ball mill, and / min we...

example 2

[0020] First, weigh 2g of expandable graphite, put it into a pulverizer and crush it, pass through a 50-mesh sieve, place the sieved expandable graphite powder in a drying oven, and dry it to constant weight at 105°C, then put the dried expandable graphite powder Graphite powder is transferred into a muffle furnace, heated to 800°C, kept for 20 seconds, cooled to room temperature, and expanded graphite is obtained; after mixing expanded graphite with 0.01g of multi-walled carbon nanotubes, add 100mL of 70% ethanol solution In the process, stir at 300r / min for 10min, then disperse with 300W ultrasonic wave for 5h, then vacuum filter, wash the filter cake twice with deionized water, put the washed filter cake in a vacuum drying oven, and dry it at 105°C to constant weight to obtain composite nano-expanded graphite; then weigh 1.2g sorbitol, 8.0g oxidized polyethylene wax, and 1.0g composite nano-expanded graphite, put them into a ball mill, then add 5mL acetone to the ball mill, ...

example 3

[0022] First, weigh 2g of expandable graphite, put it into a pulverizer and crush it, pass through a 50-mesh sieve, put the sieved expandable graphite powder in a drying oven, and dry it to constant weight at 107°C, then put the dried expandable graphite powder Graphite powder was transferred into a muffle furnace, heated to 850°C, kept for 25 seconds, and cooled to room temperature to obtain expanded graphite; after mixing expanded graphite with 0.03g of multi-walled carbon nanotubes, add 110mL of 70% ethanol solution In the process, stir at 350r / min for 12min, then disperse with 300W ultrasonic wave for 7h, then vacuum filter, wash the filter cake 3 times with deionized water, put the washed filter cake in a vacuum drying oven, and dry it at 107°C to constant weight to obtain composite nano-expanded graphite; then weigh 1.3g acrylate polyol, 8.3g stearic acid, and 1.2g composite nano-expanded graphite, put them into a ball mill, then add 7mL acetone to the ball mill, Wet bal...

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Abstract

The invention relates to a compounded phase change heat storage material and a preparation method thereof and belongs to the technical field of compounded materials. According to the preparation method, expansible graphite is processed, so that the interlayer spacing and specific surface area of the expansible graphite are enlarged, and expanded graphite is obtained, wherein the expanded graphite is of a porous reticulate space structure and has high thermal conductive performance of natural graphite and higher absorption performance; multi-wall carbon nanotubes diffuse into thermal conductive nets formed in spaces of the expanded graphite, accordingly thermal conductive performance is further improved, and heat resistance is reduced; under a high temperature condition, an organic phase change material is absorbed to the inner portion of the graphite through a microporous adsorption method, and the aim of phase change heat storage material packaging is achieved. The prepared compounded phase change heat storage material has large specific heat and is low in thermal resistance change during phase change, thermal storage performance is improved, and the material has broad application prospects.

Description

technical field [0001] The invention relates to a composite phase change heat storage material and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] Heat storage scheme design is an important technology in solar steam power generation. The performance and cost of heat storage materials are one of the main factors that determine the construction and operation costs of large-scale solar power plants. Heat storage materials used in solar power generation should meet the following requirements: heat storage materials should have high energy density; heat storage materials and heat exchange liquids should have good heat conduction; heat storage materials should have good chemical and mechanical stability; The heat storage material has good chemical compatibility with the heat exchanger and the heat exchange liquid; it should be fully reversible during the heat storage and heat release cycle; low cost. The level o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C09K5/14
CPCC09K5/063C09K5/14
Inventor 姚星宇薛洋杨阳
Owner 常州苏达欧包装材料有限公司
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