Inorganic hydrated salt porous carbon composite phase change material and preparation method thereof

A technology of composite phase change materials and inorganic hydrated salts, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve problems such as easy overcooling, poor durability, low phase change enthalpy, etc., achieve high phase change enthalpy, improve Easy supercooling and phase separation, the effect of small supercooling

Active Publication Date: 2018-10-19
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the present invention provides an inorganic hydrated salt porous carbon composite phase change material and a preparation method thereof, which can improve the phase separation, easy supercooling, low phase change enthalpy and poor durability of traditional inorganic hydrated salt phase change materials and other defects

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  • Inorganic hydrated salt porous carbon composite phase change material and preparation method thereof
  • Inorganic hydrated salt porous carbon composite phase change material and preparation method thereof
  • Inorganic hydrated salt porous carbon composite phase change material and preparation method thereof

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Embodiment 1

[0040](1) The biomass-based porous carbon was put into a nitric acid solution with a molar concentration of 1 mol / L for activation treatment. The biomass-based porous carbon was coconut shell activated carbon material, and the stirring speed was 600 r / min for 60 min. Then wash and dry to obtain biomass-based porous carbon with water content ≤10%, pore size 490 nm, particle size 45 μm, strength ≥95%, and expansion ratio 28;

[0041] (2) Weigh the inorganic hydrated salt phase change material, the pore sealing agent and the biomass-based porous carbon obtained in step (1) in proportion, and the mass ratio of the inorganic hydrated salt phase change material: biomass-based porous carbon: pore sealing agent is: 20:15:1, the inorganic hydrated salt phase change material is Mn(NO 3 ) 2 ·6H 2 O, the pore sealing agent is commercially available paraffin, for subsequent use;

[0042] (3) adding the inorganic hydrated salt phase change material in step (2) into deionized water to pre...

Embodiment 2

[0047] (1) The biomass-based porous carbon was put into a nitric acid solution with a molar concentration of 1 mol / L for activation treatment. The biomass-based porous carbon was coconut shell activated carbon material, and the stirring speed was 500 r / min for 55 min. Then wash and dry to obtain biomass-based porous carbon with water content ≤ 10%, pore size 480 nm, particle size 40 μm, strength ≥ 95%, and expansion ratio 24;

[0048] (2) Weigh the inorganic hydrated salt phase change material, the pore sealing agent and the biomass-based porous carbon obtained in step (1) in proportion, and the mass ratio of the inorganic hydrated salt phase change material: biomass-based porous carbon: pore sealing agent is: 20:10:1, the inorganic hydrated salt phase change material is Mn(NO 3 ) 2 ·6H 2 O, the pore sealing agent is commercially available paraffin, for subsequent use;

[0049] (3) adding the inorganic hydrated salt phase change material in step (2) into deionized water to ...

Embodiment 3

[0054] (1) The biomass-based porous carbon was put into a nitric acid solution with a molar concentration of 1 mol / L for activation treatment. The biomass-based porous carbon was coconut shell activated carbon material, and the stirring speed was 550 r / min for 50 min. Then wash and dry to obtain biomass-based porous carbon with water content ≤10%, pore size 470 nm, particle size 50 μm, strength ≥95%, and expansion ratio 20;

[0055] (2) Weigh the inorganic hydrated salt phase change material, the pore sealing agent and the biomass-based porous carbon obtained in step (1) in proportion, and the mass ratio of the inorganic hydrated salt phase change material: biomass-based porous carbon: pore sealing agent is: 15:15:1, the inorganic hydrated salt phase change material is Mn(NO 3 ) 2 ·6H 2 O, the pore sealing agent is commercially available paraffin, for subsequent use;

[0056] (3) adding the inorganic hydrated salt phase change material in step (2) into deionized water to pr...

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Abstract

The invention discloses an inorganic hydrated salt porous carbon composite phase change material and a preparation method thereof, wherein the preparation method comprises the following steps: firstly, preparing biomass-based porous carbon subjected to activation treatment, and weighing an inorganic hydrated salt phase change material, the biomass-based porous carbon and a pore sealing agent in proportion; and then preparing a saturated solution from the inorganic hydrated salt phase change material, adding biomass-based porous carbon, impregnating, carrying out vacuum pressurization and adsorbing; and finally, adding the pore sealing agent, stirring, wind-drying, and grinding and pulverizing, to obtain the inorganic hydrated salt porous carbon composite phase change material. The composite phase change material prepared by the method has the advantages of difficult liquid leakage, no phase separation, small supercooling degree, high phase change enthalpy, no toxicity, no corrosion, good thermal stability, good durability, low preparation cost and the like, and has broad market prospects in the fields of building and energy-storage materials.

Description

technical field [0001] The invention relates to the technical field of phase-change heat storage materials, and more particularly to an inorganic hydrated salt porous carbon composite phase-change material and a preparation method thereof. Background technique [0002] Phase change materials have a wide range of application prospects in energy storage and utilization due to their suitable phase transition temperature, large latent heat of phase transition, fast phase transition speed, good thermal conductivity and reversibility. Phase change materials are the core of latent heat storage technology and can be divided into organic phase change materials and inorganic phase change materials. At present, most of the research on phase change materials focuses on organic phase change materials, but the high raw material price of organic phase change materials limits its popularization and application. [0003] Inorganic phase change materials, especially inorganic hydrated salt p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 项东孙浩森朱玉轩王诗涵刘科高
Owner SHANDONG JIANZHU UNIV
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