Phase-change material of natural kawo fiber pipe encapsulation and encapsulation method thereof

A composite phase change material and phase change material technology, applied in the field of encapsulating phase change materials, can solve the problems of limited material selection, high cost, small latent heat of phase change, etc., and achieve good chemical stability, stable energy output, thermal and chemical stability. The effect of stability

Active Publication Date: 2010-03-10
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength, permeability and heat resistance of the capsule wall of the microcapsule still need to be improved, and the main reason is that the cost is relatively high.
[0006] The Chinese invention patent application No. 200610117225.0 discloses a manufacturing method of kapok phase change material. The method adopts crosslinking agent and catalyst to fix the phase change material in kapok fiber. The material is directly chemically cross-linked and solidified without further encapsulation process, and the resulting phase change material can only undergo solid-solid transition to prevent the phase change material from seeping out, the material selection is limited, and the latent heat of phase change is small

Method used

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  • Phase-change material of natural kawo fiber pipe encapsulation and encapsulation method thereof
  • Phase-change material of natural kawo fiber pipe encapsulation and encapsulation method thereof
  • Phase-change material of natural kawo fiber pipe encapsulation and encapsulation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Liquefaction of core material

[0045] Heating the organic phase change material paraffin to a melting point above 60°C to obtain a liquid paraffin phase change material;

[0046] (2) Capillary adsorption of natural kapok fiber tubes to liquid phase change materials

[0047] The natural kapok fiber tube is dispersed in the liquid phase change material in step (1), soaked to balance the capillary absorption, and the fiber tube is filled with the liquid phase change material. Then, the fiber tube is pulled out, and the phase change material adsorbed between the fibers is squeezed out, while the remaining fiber is still filled with the liquid phase change material;

[0048] (3) Curing of phase change materials

[0049] Lowering the temperature of the system in step (2) to below 60°C of the phase change point of the phase change material to solidify the paraffin wax of the phase change material;

[0050] (4) Seal the wall and end of the fiber tube filled with phase c...

Embodiment 2

[0053] (1) Liquefaction of core material

[0054] Dissolving the organic phase change material pentaerythritol (PE) into ethanol to obtain a liquid pentaerythritol (PE) solution phase change material;

[0055] (2) Capillary adsorption of natural kapok fiber tubes to liquid phase change materials

[0056] The natural kapok fiber tube is dispersed in the liquid phase change material obtained in step (1), soaked to balance the capillary absorption, and the fiber tube is filled with the liquid phase change material. Then, the fiber tube is pulled out, and the phase change material adsorbed between the fibers is squeezed out, while the remaining fiber is still filled with the liquid phase change material;

[0057] (3) Curing of phase change materials

[0058] The ethanol of the phase change material containing the ethanol solvent obtained in step (2) is volatilized, and the phase change material pentaerythritol (PE) solution is concentrated and solidified;

[0059] (4) Seal the ...

Embodiment 3

[0062] (1) Liquefaction of core material

[0063] Inorganic phase change material CaCl 2 ·6H 2 O dissolved in deionized water to obtain liquid CaCl 2 ·6H 2 O solution phase change material;

[0064] (2) Capillary adsorption of natural kapok fiber tubes to liquid phase change materials

[0065] The natural kapok fiber tube is dispersed in the liquid phase change material in step (1), soaked to balance the capillary absorption, and the fiber tube is filled with the liquid phase change material. Then, the fiber tube is pulled out, and the phase change material adsorbed between the fibers is squeezed out, while the inside of the retained fiber is still filled with the liquid phase change material.

[0066] (3) Curing of phase change materials

[0067] The deionized water of the phase change material containing the deionized water solvent that step (2) obtains is volatilized, and the phase change material CaCl 2 ·6H 2 O solution is concentrated and solidified;

[0068] (4)...

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Abstract

The invention relates to a packaging material for phase change materials, in particular to a natural plant fiber tube used for packaging various phase change materials which have phase change thermoregulation function within a wide temperature range and a method for packaging the phase change materials through the packaging material. The invention takes the cheap and easily obtained natural fibertube, that is, kawo kawo fibers as the packaging material for the various phase change materials. The phase change materials are packaged in the natural kawo kawo fiber tube which has an external walland two ends sealed by polymers. The kawo kawo fibers which are taken as phase change energy storage materials are more advantageous than any other material; in addition, the kawo kawo fibers basically have no thermal degradation at a temperature of 250 DEG C due to good thermal stability. The high percentage of hollow volume of the kawo kawo fiber tube brings about greater energy storage density, an enclosed structure brings about stable energy output, a superfine micron-sized tubular structure brings about rapid heat transfer, and the special lipophilic and hydrophobic wettability can be used in the machining process.

Description

technical field [0001] The invention relates to a packaging material for phase-change materials, in particular to using natural plant fiber tubes to package various phase-change materials with phase-change temperature regulation functions in a wide temperature range, and a method for packaging phase-change materials using the packaging material. Background technique [0002] Phase change materials (Phase change materials, PCM), also known as latent thermal energy storage (LTES), use the property of absorbing (or releasing) a large amount of heat when a substance undergoes a phase change to store heat. It has the advantages of high density, small equipment volume, high thermal efficiency, and heat absorption and release are constant temperature processes. As an energy storage carrier, phase change materials can improve the utilization rate of energy and alleviate the problem of energy shortage. They have been widely used in refrigeration and cold storage of refrigerators and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/02D01D5/24D06M23/00D06M15/21
Inventor 张晓艳徐坚张小莉
Owner INST OF CHEM CHINESE ACAD OF SCI
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