Composite phase change material for microwave heating energy storage, as well as preparation method and application thereof

A composite phase-change material and microwave heating technology, applied in heat exchange materials, chemical instruments and methods, drinking vessels, etc., can solve the problems of loss of thermal insulation performance of thermos cups, high cost of vacuum thermos cups, etc., and achieve the goal of preparation process Simple and convenient, simple design, cost reduction effect

Inactive Publication Date: 2019-09-27
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, most thermos cups on the market use vacuum insulation heat convection technology. This technology has extremely high requirements on the inner liner and shell of the cup, which leads to high cost of vacuum thermos cups. Immediate loss of insulating properties

Method used

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  • Composite phase change material for microwave heating energy storage, as well as preparation method and application thereof
  • Composite phase change material for microwave heating energy storage, as well as preparation method and application thereof
  • Composite phase change material for microwave heating energy storage, as well as preparation method and application thereof

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preparation example Construction

[0037] The invention discloses a method for preparing a composite phase change material for heat storage. The composite phase change material composed of a wave-absorbing material and a phase change material is rapidly heated and stored for heat preservation, specifically:

[0038] The phase change material is taken as a raw material, placed in a rapid heating device, then graphene is added, stirred with an electromagnetic stirrer until completely dispersed, and the complex phase change material is produced after natural cooling.

[0039] Rapid heating devices include but are not limited to electromagnetic heating plates, water bath heaters and other heating devices, heating at 80-100°C for 5-15 minutes to completely change the phase change material from solid to liquid.

[0040] Graphene is one or more of expanded graphite, thermally exfoliated graphene, mechanically exfoliated graphene, liquid phase exfoliated graphene, high temperature carbonized graphene, 3D graphene, graph...

Embodiment 1

[0045] 1. Take 30g of paraffin and 0.3g of graphene as raw materials, mix them fully with an electromagnetic stirrer under heating, and prepare to put them into a microwave oven for testing after cooling; figure 1 shown;

[0046] 2. Set the microwave time to 20s and the power to 800w. After the microwave is over, it can be seen that the composite phase change material in the present invention is completely transformed into a liquid phase, and a large amount of heat is stored; the liquid phase of the composite phase change material is as follows: figure 2 shown;

[0047] 3. Observe the cooling process of the composite phase change material in the present invention and record its temperature change curve. The state of the solid-liquid mixed phase of the composite phase change material during cooling and exothermic process is as follows: image 3 As shown, the temperature change curve is shown as Figure 4 shown.

Embodiment 2

[0049] 1. Take 30g of hydrated salt barium hydroxide octahydrate and 1.5g of graphene as raw materials, mix them fully with an electromagnetic stirrer under heating, and prepare to put them into a microwave oven for testing after cooling down;

[0050] 2. Set the microwave time to 30s and the power to 1000w. After the microwave is over, it can be seen that the composite phase change material in the present invention is completely transformed into a liquid phase and stores a large amount of heat.

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Abstract

The invention discloses a composite phase change material for microwave heating energy storage, as well as a preparation method and application thereof. The composite phase change material comprises a phase change material and graphene, wherein the mass ratio of the phase change material to the graphene is 1:(0.01-0.05); the phase change temperature of the composite phase change material is 54-62 DEG C; the heat of fusion is 200-220 J/g; the density is 0.9 g/cm<3>. According to the composite phase change material for the microwave heating energy storage, as well as the preparation method and application thereof, the design is simple; no harsh environment such as vacuum in the production process is needed; the cost can be reduced; a safer effect is realized; mass production on a large scale can be realized; microwaves are utilized to rapidly heat a vacuum cup and a large amount of heat energy is stored; the daily heat preservation demand for beverages is met; the heat preservation time is long; the cost is saved; no additional device is used.

Description

technical field [0001] The invention belongs to the technical field of new carbon materials, and in particular relates to a composite phase-change material for microwave heating energy storage and its preparation method and application. Background technique [0002] Graphene is a two-dimensional nanomaterial with a single atomic layer thickness composed of carbon atoms through SP2 hybridization. Due to its unique structure and physical and chemical properties such as large specific surface area, ultra-thin, large interface, high light transmittance, and tunable conductivity , graphene has potential applications in many fields, especially in the field of microwave absorption, the excellent properties of graphene determine its wide range of applications. At the same time, under the severe situation of global environmental pollution and energy shortage, thermal energy storage systems that improve energy efficiency and utilization and solve the gap between energy supply and dema...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06A47G19/22
CPCA47G19/2288C09K5/063
Inventor 韩晓刚杨恒瑞杨超吴晓东白宇鸽尹玉婷
Owner XI AN JIAOTONG UNIV
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