Composite phase change material as well as preparation method and application thereof

A composite phase change material and phase change material technology, applied in the field of special materials, can solve problems such as processing difficulties, loss of heat storage and temperature adjustment of phase change materials, and rupture of phase change microcapsules

Active Publication Date: 2022-08-09
北京金羽新能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing phase change materials encapsulated by phase change microcapsules, some of the phase change microcapsules will be squeezed and broken during processing, causing the phase change materials to lose part of their heat storage and temperature regulation functions, and the overflowing liquid phase Changing materials is easy to cause adhesion between materials, which increases difficulties for subsequent processing
At the same time, the existing phase-change temperature-regulating materials using phase-change microcapsule technology have low enthalpy and are easy to fall off; moreover, the polyurea resin material monomer used in most phase-change microcapsules is highly toxic and not environmentally friendly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] According to one aspect of the present invention, a preparation method of the above-mentioned composite phase change material, the preparation method comprises the following steps:

[0062] After mixing the raw materials, melt granulation is performed to obtain a composite phase change material.

[0063] The present invention provides a preparation method of a composite phase change material, wherein the preparation method is to perform melting and granulation after mixing each raw material to obtain a composite phase change material. The above preparation method has the advantages of simple process and easy operation.

[0064] According to one aspect of the present invention, an application of the above composite phase change material in the preparation of phase change temperature regulation products.

[0065] The above-mentioned composite phase change material provided by the present invention can be widely used in the preparation process of phase change temperature ...

Embodiment 1

[0069] A composite phase change material comprising the following components:

[0070] Octadecane 40g, α-cyclodextrin grafted silica aerogel 8g, maleic anhydride grafted polyethylene 2g, styrene-ethylene-butylene-styrene block polymer 30g, high-density polyethylene 10g , 5g of microcrystalline wax, 5g of linear low density polyethylene and 0.9g of antioxidant 1076;

[0071] The preparation method of the composite phase change material includes:

[0072] The above components are mixed by a high-speed mixer, and the speed of the high-speed mixer is 200-300 rpm; then a single-screw extruder is added for granulation, and the temperature of each section of the single-screw is between 180-200 ° C, and the screw speed is controlled at 150-250 revolutions / min, underwater dicing, and the rotating speed of the cutter is 60-200 revolutions / min to obtain composite phase change material pellets.

Embodiment 2

[0074] A composite phase change material comprising the following components:

[0075] 40 g of octadecane, 8 g of β-cyclodextrin, 2 g of maleic anhydride grafted polyethylene, 30 g of styrene-ethylene-propylene-styrene block polymer, 10 g of high-density polyethylene, 5 g of microcrystalline wax , linear low density polyethylene 5 g and antioxidant 10760.9 g;

[0076] The preparation method of the composite phase change material is the same as that in Example 1.

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Abstract

The invention provides a composite phase change material as well as a preparation method and application thereof, and relates to the technical field of special materials. The composite phase change material comprises a cyclodextrin auxiliary agent, and the cyclodextrin auxiliary agent comprises at least one of beta-cyclodextrin, alpha-cyclodextrin, gamma-cyclodextrin, methyl-cyclodextrin, ethyl-cyclodextrin, alpha-cyclodextrin grafted silicon dioxide aerogel, citric acid grafted cyclodextrin and polysiloxane grafted cyclodextrin. As a hydrophobic environment is formed in a cyclodextrin molecule cavity, various organic molecules can be easily included due to a proper cavity size, and a host-guest inclusion complex is formed; meanwhile, numerous hydroxyl groups of cyclodextrin can provide a large number of acting sites after being modified according to the performance characteristics of the phase change material, and form a relatively firm framework supporting and blocking structure with a macromolecular supporting material, a compatilizer and the phase change material through hydrogen bonds and the like, so that the phase change material is effectively prevented from migrating to the surface; and the leakage problem of the phase change material in microcapsule packaging is greatly improved.

Description

technical field [0001] The invention relates to the technical field of special materials, in particular to a composite phase change material and a preparation method and application thereof. Background technique [0002] With the improvement of the economic level, consumers' requirements for the environment and clothing are gradually becoming more diversified and multi-functional. Because of their insensitivity to moisture and external pressure, thermal storage and temperature-adjusting materials can provide a comfortable micro-environment for the human body, and have The two-way temperature adjustment function has become one of the key developed products. [0003] Organic phase change heat storage materials have the advantages of high latent heat of phase change, almost no supercooling phenomenon, no phase separation and corrosion, and are increasingly becoming the preferred phase change materials for many commercial applications. The heat storage / release process of organi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C08L53/02C08L87/00C08L5/16C08L83/10C08K5/01C08K5/10C08K5/09C08K5/05
CPCC09K5/063C08L53/025C08L2207/066C08L2207/062C08L2205/035C08L87/005C08L5/16C08L83/10C08K5/01C08K5/10C08K5/09C08K5/05Y02E60/14
Inventor 赵晓娜邹如强姚锐敏黄杜斌
Owner 北京金羽新能科技有限公司
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