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Composite phase-change material for encapsulating lauric acid and preparation method of composite phase-change material

A technology of composite phase change material and lauric acid, which is applied in the field of composite phase change material encapsulating lauric acid and its preparation, can solve the problems of restricting mass production and application, complex manufacturing process, low density, etc., and achieve good mechanical and chemical stability Sexuality, solve the effect of high preparation cost

Pending Publication Date: 2022-04-12
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solid-liquid phase change material will inevitably leak during the phase change process, which affects the heat storage performance of the phase change material and shortens its life.
[0004] In order to deal with these problems, aerogels with ultra-low density, ultra-high porosity, and large specific surface area have been widely used in the synthesis of shape-stable phase change materials, among which graphene aerogels are due to their good thermal conductivity and resistance to 400~ The good absorption of visible light in the 760nm range has attracted the attention of scientific researchers, but its high manufacturing cost and complicated manufacturing process limit its mass production and application in industry

Method used

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  • Composite phase-change material for encapsulating lauric acid and preparation method of composite phase-change material
  • Composite phase-change material for encapsulating lauric acid and preparation method of composite phase-change material
  • Composite phase-change material for encapsulating lauric acid and preparation method of composite phase-change material

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Experimental program
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Effect test

Embodiment 1

[0038] A composite phase-change material encapsulating lauric acid, the composite phase-change material comprising crosslinked airgel with interconnected three-dimensional pore structures, and airgel encapsulated in interconnected three-dimensional pore structures Lauric acid inside; the airgel with interconnected three-dimensional pore structure is formed by cross-linking poplar flocculent sheet under the action of polyvinyl alcohol aqueous solution; poplar flocculant sheet is poplar flocculant sheet modified by polydopamine.

[0039] A preparation method for a composite phase-change material encapsulating lauric acid, comprising the following steps:

[0040] 1) After cleaning the collected poplar catkins with deionized water and absolute ethanol several times, put them into an oven at 70° C. for 18 hours to obtain dried poplar catkins;

[0041] 2) Put the dried poplar catkins into a tube furnace, anneal at 800°C for 2 hours in an argon atmosphere to obtain poplar catkin carb...

Embodiment 2

[0057] A preparation method for a composite phase-change material encapsulating lauric acid, comprising the following steps:

[0058] 1) After cleaning the collected poplar catkins with deionized water and absolute ethanol several times, put them into an oven at 70° C. for 18 hours to obtain dried poplar catkins;

[0059] 2) Put the dried poplar catkins into a tube furnace, anneal at 800°C for 2 hours in an argon atmosphere to obtain poplar catkin carbon tubes after annealing; the heating rate is 5°C / min;

[0060] 3) Ultrasonic pulverization of poplar flocculent carbon tubes in absolute ethanol for 6 hours after annealing, and drying to obtain poplar flocculent carbon sheets;

[0061] 4) Weigh 1.22114g tris reagent and dissolve it in 980mL deionized water, then adjust the pH value to 8.5 with pre-prepared 1mol / L hydrochloric acid (measured in real time with a pH meter), and then transfer to a 1000mL volumetric flask Dilute to volume with deionized water to obtain a tris-HCl b...

Embodiment 3

[0079] A preparation method for a composite phase-change material encapsulating lauric acid, comprising the following steps:

[0080] 1) After cleaning the collected poplar catkins with deionized water and absolute ethanol several times, put them into an oven at 70° C. for 18 hours to obtain dried poplar catkins;

[0081] 2) Put the dried poplar catkins into a tube furnace, anneal at 800°C for 2 hours in an argon atmosphere to obtain poplar catkin carbon tubes after annealing; the heating rate is 5°C / min;

[0082] 3) Ultrasonic pulverization of poplar flocculent carbon tubes in absolute ethanol for 6 hours after annealing, and drying to obtain poplar flocculent carbon sheets;

[0083] 4) Weigh 1.22114g tris reagent and dissolve it in 980mL deionized water, then adjust the pH value to 8.5 with pre-prepared 1mol / L hydrochloric acid (measured in real time with a pH meter), and then transfer to a 1000mL volumetric flask Dilute to volume with deionized water to obtain a tris-HCl b...

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Abstract

The invention relates to the technical field of phase change materials, and discloses a lauric acid-encapsulated composite phase change material and a preparation method thereof, the composite phase change material comprises aerogel which is formed by crosslinking and has mutually communicated three-dimensional porous structures, and lauric acid encapsulated in the aerogel with the mutually communicated three-dimensional porous structures; the aerogel with mutually communicated three-dimensional porous structures is formed by cross-linking poplar catkin carbon sheets under the action of a cross-linking agent; the cross-linking agent is a polyvinyl alcohol aqueous solution. The poplar catkin carbon sheet is a poplar catkin carbon sheet modified by polydopamine. The lauric acid-encapsulated polydopamine-modified poplar catkin carbon sheet / polyvinyl alcohol composite phase change material is prepared from poplar catkin, the materials involved in the preparation process are cheap and easy to obtain and have no harm to the environment, the problems that traditional graphene aerogel is high in preparation cost and complex in preparation process can be effectively solved, and the preparation method is suitable for industrial production. The method has the capabilities of industrial production and practical application, and provides a new idea for application of biomass.

Description

technical field [0001] The invention relates to the technical field of phase change materials, and discloses a composite phase change material encapsulating lauric acid and a preparation method thereof. Background technique [0002] With the rapid development of the economy and the continuous improvement of people's lives, the demand for energy is gradually increasing, and the increase in the world's population has aggravated the energy shortage. The current energy source mainly relies on fossil fuels such as coal and oil, but these are non-renewable energy sources, and the use of these fossil fuels will inevitably cause environmental pollution, so the development of clean and renewable energy is the solution to this problem. effective approach to the problem. [0003] As a renewable and clean energy, solar energy has the advantages of not being restricted by region, large energy, and non-polluting. However, the intermittent and random nature of solar energy often leads to ...

Claims

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Application Information

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IPC IPC(8): C09K5/06C08J9/28C08L29/04C08K9/04C08K7/00C08K3/04C08K5/09
CPCY02E60/14
Inventor 赵亚婔马旭珂张冰尚会姗王丹
Owner ZHENGZHOU UNIV