Polyalcohol solid-solid phase-change composite material and preparation method thereof

A phase-change composite material and a technology for phase-change materials, which are applied in the field of phase-change energy storage composite materials and their preparation, can solve the problems of difficulty in large-scale batch preparation, complex preparation processes and methods of composite materials, and the like, and reach the phase-change temperature range. The effect of wide and large latent heat of phase transition

Active Publication Date: 2010-05-05
海鹰空天材料研究院(苏州)有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese patents CN1506434A, CN1754937A, CN101434832A, CN1369537A, CN1269932C and CN101397489A all report the use of paraffin phase change materials, wherein the phase change materials are encapsulated by the intermolecular force between the phase change materials and polymers. In the polymer network skeleton, a solid-solid phase change composite material is thus formed; Chinese patent CN1657587A reports that the paraffin phase change material is first made into microcapsules and then compounded with resin to form a solid-solid phase change composite material, but In this method, because the phase change microcapsule material is prepared first, the process is very complicated and the cost is greatly increased; Chinese patent CN1958711A reports an opal / polyurethane solid-solid phase change energy storage material and its preparation method, but it must first prepare polyethylene glycol The polyurethane prepolymer of alcohol end group, method is comparatively complicated; CN101333432A, CN1322091C and CN101029217A all adopt sol-gel method to prepare silica composite paraffin, polyethylene glycol, fatty acid solid-liquid phase change material, use all Describe solid-liquid phase change material to form solid-solid phase change composite; Form of phase change composite materials; Chinese patents CN1309797C and CN1803965A report inorganic salt-ceramic matrix composite phase change materials, which are mainly used for thermal energy storage in high temperature fields
The above-mentioned disclosed patents are all apparent solid-solid phase change composite materials made by using a solid-liquid phase change material with auxiliary materials in a certain molding method, but this phase change composite material has poor stability and is prone to problems in long-term use. serious problems such as leakage and performance attenuation, and at the same time, the preparation process of the composite material is often relatively complicated, and it is not easy to prepare in large quantities

Method used

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  • Polyalcohol solid-solid phase-change composite material and preparation method thereof
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Example 1: Preparation of neopentyl glycol / room temperature curing silicone rubber phase change composite material

[0092] (1) Mechanically pulverize neopentyl glycol (chemically pure, Beijing Chemical Reagent Company) and sieve to make its particle size less than 500 μm;

[0093] (2) After mixing 90g of neopentyl glycol, 8g of room temperature curing methyl silicone resin (developed by Beijing Institute of Chemistry) and 2g of zinc naphthenate curing agent powder evenly, spread them evenly in the mold, and after closing the mold, place the mold at room temperature Press and form at 5MPa, and then remove the mold and take out the prefabricated block.

[0094] (3) After curing the prefabricated block at room temperature for 48 hours (hours), the neopentyl glycol / room temperature curing silicone rubber phase change composite material is obtained.

[0095] After DSC (differential scanning calorimeter (METTLER DSC822e type produced in Germany), the test parameter is N 2 ...

Embodiment 2

[0096] Example 2: Preparation of neopentyl glycol / room temperature curing silicone rubber phase change composite material

[0097] (1) Mechanically pulverizing neopentyl glycol and sieving to make the particle size less than 300 μm;

[0098] (2) After mixing 80g of neopentyl glycol, 10g of room temperature curing methyl silicone resin, 5g of titanium dioxide with a particle size of less than 10μm, and 5g of cyclohexane diluent, spread them evenly in the mold, and after closing the mold, place it at room temperature with 5MPa compression molding, and then remove the mold to take out the prefabricated block.

[0099] (3) After the prefabricated block was cured at room temperature for 48 hours, it was placed in an oven at 50° C. for another 48 hours to obtain the neopentyl glycol / room-temperature-cured silicone rubber phase-change composite material.

[0100] According to DSC measurement, the phase transition temperature of the prepared neopentyl glycol / room temperature curing s...

Embodiment 3

[0101] Embodiment 3: Preparation of neopentyl glycol / epoxy resin phase change composite material

[0102] (1) Mechanically pulverizing neopentyl glycol and sieving to make the particle size less than 100 μm;

[0103](2) 70g neopentyl glycol, 15g E51 epoxy resin (industrial product), 5g T31 curing agent (industrial product) and 10g of metal copper powder with a particle size of 100 μm or less are evenly mixed and spread evenly in the mold, After the mold is closed, it is pressed and formed at 3MPa, and the mold is removed to take out the prefabricated block.

[0104] (3) After the prefabricated block was cured at room temperature for 48 hours, the prefabricated block was placed in an oven at 50° C. for another 48 hours to obtain a neopentyl glycol / epoxy resin phase change composite material.

[0105] According to DSC measurement, the phase transition temperature of the prepared neopentyl glycol / room temperature curing silicone rubber phase change composite material is 45°C, an...

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Abstract

The invention provides a polyalcohol solid-solid phase-change composite material. The polyalcohol solid-solid phase-change composite material comprises a polyalcohol solid-solid phase-change material and a resin base material, is capable of avoiding the problems of melt flow and osmotic migration, and has wide phase-change temperature range, big phase-change latent heat, and adjustable phase-change temperature and phase-change latent heat. The invention further provides a method for preparing the polyalcohol solid-solid phase-change composite material. The method can be used for preparing the polyalcohol solid-solid phase-change composite materials with all profiles and good constancy and in all sizes. The preparation technology is simple and free from environment pollution. The polyalcohol solid-solid phase-change composite material of the invention has wide application value in the fields, such as the heat protection of aircrafts, the constant-temperature temperature control of precise instruments, meters and electronic devices, heat barrier coating, solar utilization, recovery of industrial residual heat and waste heat, the energy source of electric peak load shifting and valley filling, material, aerospace, textile, electric power, medical instrument, building and the like.

Description

technical field [0001] The invention relates to the technical field of functional composite materials, in particular, the invention relates to a phase-change energy storage composite material and a preparation method thereof. Background technique [0002] Phase change materials (PCMs) refer to a kind of intelligent material that can absorb or release heat when a substance changes phase, but the temperature of the substance itself does not change or changes little. Due to its unique adaptive environment temperature regulation and other functions, it is widely used in energy, materials, aerospace, textile, electric power, etc. Medical equipment, construction and other fields. [0003] According to the phase change process of phase change materials, they can be mainly divided into solid-solid phase change materials, solid-liquid phase change materials, solid-gas phase change materials, and liquid-gas phase change materials. The solid-gas phase transition and liquid-gas phase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/02
Inventor 金兆国詹万初邹军锋张昊霍鹏飞赵英民
Owner 海鹰空天材料研究院(苏州)有限责任公司
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