Phase change material microcapsules encapsulated by natural microtubules and preparation method thereof

A technology of microcapsules and microtubes, which is applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., can solve the problems of high cost, and achieve the effects of stable energy output, rapid heat transfer, and good thermal stability

Active Publication Date: 2010-03-31
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.

Method used

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  • Phase change material microcapsules encapsulated by natural microtubules and preparation method thereof
  • Phase change material microcapsules encapsulated by natural microtubules and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1, preparation of natural kapok fiber tube encapsulated paraffin and phase change microcapsules encapsulated with urea-formaldehyde resin

[0037] (1) Liquefaction of core material phase change material

[0038] Heating the organic phase change material paraffin to a melting point above 60°C to obtain a liquid paraffin phase change material;

[0039] (2) Filling chopped natural microtubules with liquid phase change materials

[0040] Disperse 1 g of natural kapok fibers (shorted microtubes) with a length of 10-50 μm in 10 mL of the liquid phase change material in step (1), soak to balance the capillary absorption, and make the kapok fiber tubes full of liquid phase change materials;

[0041] (3) Encapsulation of microencapsulated phase change materials

[0042] Directly add 2g of urea-formaldehyde prepolymer dropwise in the melt of the natural kapok fiber that has been filled with phase change material in step (2) (2ml volume fraction is the formaldehyde aqueo...

Embodiment 2

[0048] Example 2, preparation of natural milkweed fiber encapsulated pentaerythritol and phase change microcapsules encapsulated with cellulose acetate

[0049] (1) Liquefaction of core material phase change material

[0050] Dissolving the organic phase change material pentaerythritol (PE) in a small amount of ethanol to obtain a liquid phase change material of pentaerythritol (PE) solution;

[0051] (2) Filling chopped natural microtubules with liquid phase change materials

[0052] Dispersing 1g of natural milkweed fiber with a length of 0.5-10 μm in 10mL of the liquid phase change material obtained in step (1), soaking to balance the capillary absorption, so that the milkweed fiber tube is filled with the liquid phase change material;

[0053] (3) Encapsulation of microencapsulated phase change materials

[0054] The ethanol in the phase-change material microcapsules containing ethanol solvent that step (2) obtains is volatilized, and after the phase-change material pent...

Embodiment 3

[0058] Embodiment 3, preparation natural bamboo fiber encapsulation CaCl 2 ·6H 2 O and phase change microcapsules encapsulated with cellulose acetate

[0059] (1) Liquefaction of core material phase change material

[0060] 1g of inorganic phase change material CaCl 2 ·6H 2 O was dissolved in 10 mL deionized water to obtain liquid CaCl 2 ·6H 2 O solution phase change material;

[0061] (2) Filling chopped natural microtubules with liquid phase change materials

[0062] Disperse 1g of natural bamboo fibers with a length of 500-1000 μm in the liquid phase-change material obtained in 10mL (1), soak to balance the capillary absorption, and make the bamboo fiber tube full of liquid phase-change material;

[0063] (3) Encapsulation of microencapsulated phase change materials

[0064] The deionized water in the phase-change material microcapsule containing deionized water obtained by step (2) is volatilized to make the phase-change material CaCl 2 ·6H 2 After O solution is ...

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Abstract

The invention discloses phase change material microcapsules encapsulated by microtubules and a preparation method thereof. The phase change material microcapsules consist of a phase change material, curtal microtubules and polymer, wherein the curtal microtubules are obtained by cutting a hollow tubular natural fiber into fibers sections with a length of 0.1mm-5cm; the diameter of the hollow tubular natural fiber is 0.1-1,000 mu m; and the phase change material is encapsulated in the curtal microtubules, and the curtal microtubules are enwrapped in the polymer. The adopted encapsulating pipe is a natural microtubule with low cost and high availability; the large hollowness of the microtubule ensures large energy storage density of the microtubule, so the encapsulation structure ensures stable energy output; and fine nanometer tubular structure ensures quick heat transfer, and the heat and chemical stability contribute to long-term use.

Description

technical field [0001] The invention relates to a phase change microcapsule encapsulated by natural microtubules and a preparation method thereof. Background technique [0002] Phase change materials (Phase change materials, PCM), also known as latent thermal energy storage (LTES), refers to a material that can absorb or release heat when the phase changes, but the temperature of the material itself does not change or changes little. class material. As an energy storage carrier, phase change materials can effectively improve energy utilization and alleviate energy shortages due to their advantages such as high heat storage density, small equipment size, high thermal efficiency, and heat absorption and release are constant temperature processes. At present, it has been widely used in refrigeration and cold storage of refrigerators and air conditioners, automatic constant temperature of intelligent buildings, energy storage and exchange technology in solar energy applications...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/02B01J13/02
CPCB01J13/04C09K5/14B01J13/22C09K5/063F28D20/023Y10T29/4935Y10T29/49357
Inventor 张晓艳赵宁张小莉徐坚
Owner INST OF CHEM CHINESE ACAD OF SCI
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