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Polyethylene glycol-porous expanded graphite material and preparation method thereof

A technology of polyethylene glycol and graphite materials, which is applied in the preparation of polyethylene glycol-porous expanded graphite materials, and in the field of polyethylene glycol-porous expanded graphite materials, which can solve the problems of poor thermal conductivity and inconvenient storage, and achieve thermal conductivity Effects that perform well and are easy to store

Inactive Publication Date: 2016-07-20
XIAN UNIV OF TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a polyethylene glycol-porous expanded graphite material, which solves the problems of poor thermal conductivity and inconvenient storage of polyethylene glycol organic phase change materials in the prior art

Method used

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  • Polyethylene glycol-porous expanded graphite material and preparation method thereof
  • Polyethylene glycol-porous expanded graphite material and preparation method thereof
  • Polyethylene glycol-porous expanded graphite material and preparation method thereof

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] The polyethylene glycol-porous expanded graphite material of the present invention, referred to as PEG-600 / EG or PEG-600 / EG material, belongs to a low-temperature composite phase-change energy storage material.

[0027] The physical and chemical characteristics of the polyethylene glycol-porous expanded graphite material of the present invention are that the appearance is solid powder, the phase transition temperature is 6.2°C-14.7°C, the phase transition enthalpy is 74.9kJ / kg-159.3kJ / kg, and the thermal conductivity is 7.7 ~13.7W / m.k, thermal diffusivity is 2.03~4.26mm2 / s;

[0028] The microstructural feature of the polyethylene glycol-porous expanded graphite material of the present invention is that when the mass percent of EG is 6wt.%, the microcell spacing of the porous expanded graphite is larger ( figure 1 When a), large V-shap...

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Abstract

The invention discloses a polyethylene glycol-porous expanded graphite material, the phase-transition temperature is 6.2DEG C to 14.7DEG C, the enthalpy of phase change is 74.9kJ / kg to 159.3kJ / kg, the coefficient of thermal conductivity is 7.7W / m.k to 13.7W / m.k, and the thermal diffusion coefficient is 2.03mm2 / s to 4.26 mm2 / s. The invention also discloses a preparation method of the polyethylene glycol-porous expanded graphite material. The polyethylene glycol-porous expanded graphite material disclosed by the invention has good heat-conducting property, is easily stored, uses PEG (polyethylene glyco) molecular weight less than 1000, and is quite suitable for the preservation, storage and transportation of fruits and vegetables.

Description

technical field [0001] The invention belongs to the technical field of low-temperature composite phase-change energy storage materials, and relates to a polyethylene glycol-porous expanded graphite material. The invention also relates to a preparation method of the polyethylene glycol-porous expanded graphite material. Background technique [0002] Phase change materials (PCMs) or phase change energy storage materials need to absorb or release a large amount of heat energy from the environment when the physical state changes, and use the performance of phase change materials to store heat to adjust the ambient temperature and reconcile heat supply and demand. Paradoxes that do not match in time and space. [0003] The preparation method of the expanded graphite-based composite phase change energy storage material is simple. The expanded graphite with large surface area and microporous structure is used as the matrix. Under the joint action of the surface tension of the expa...

Claims

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Application Information

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IPC IPC(8): C08L71/08C08K7/24C09K5/14
CPCC09K5/14C08K7/24C08L71/08
Inventor 郭彦峰余亮汉张伟
Owner XIAN UNIV OF TECH
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