High-effect composite polyurethane phase change material and preparation method thereof

A technology of composite polyurethane and phase change materials, applied in the field of high-efficiency composite polyurethane phase change materials and its preparation, can solve the problems of low tensile strength, long time required, poor energy conduction effect, etc., and achieve wide application and good performance Effect

Inactive Publication Date: 2018-08-21
李维治
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above invention still has the disadvantages of long energy conduction t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] The present invention provides a method for preparing a high-performance composite polyurethane phase change material, which is characterized by including the following steps:

[0018] Step (1): Take 99.99%-88% polyol, add 0.01-5% catalyst and 0-7% chain extender, and react with constant temperature stirring to obtain prepolymer A;

[0019] Step (2): Add 5%-25% of bis(poly)isocyanate to prepolymer A obtained in step (1), and react with constant temperature stirring to obtain prepolymer B;

[0020] Step (3): Add 0.1-10% of a high-efficiency energy-conducting filler additive to the prepolymer B obtained in step (2), and stir at a constant temperature to obtain the prepolymer C;

[0021] Step (4): Add 0-30% adhesive to the prepolymer C obtained in step (3), and stir at constant temperature until it is completely dissolved.

[0022] The stirring reaction times of the step (1), step (2), and step (3) are 3 min˜120 min, 1.5 min˜120 min, and 2 min˜120 min, respectively.

[0023] The cons...

Example Embodiment

[0033] Example 1

[0034] The 77.98% of the polyhexanediol adipate polyol with a molecular weight of 3000 is heated to 80°C with a constant temperature heating and stirring reaction ax, and stirred at a stirring rate of 350 rpm. While stirring, add 0.02% dibutyl tin dilaurate dropwise, Add 1% 1,6-hexanediol dropwise, after the addition is complete, continue to react with constant temperature stirring for 3 minutes; add 15% MD1 while stirring, continue to react with constant temperature stirring for 1.5 minutes after the drop is completed, and then add 1% graphene After the dripping is completed, continue constant temperature stirring reaction for 2 minutes, then add 5% polyurethane adhesive, and continue to stir at 80°C until it is completely dissolved to prepare the corresponding polyurethane phase change material and then evenly pour it into the production equipment to obtain a white polyurethane phase Change material.

[0035] The prepared material conducts heat conduction quic...

Example Embodiment

[0036] Example 2

[0037] The other content of this embodiment is the same as that of embodiment 1, the difference is: heating and constant temperature stirring temperature is 75°C, polyhexyl adipate with molecular weight of 3000 is used as 87.88, dibutyltin dilaurate is added in 0.02%, The amount of hexamethylene diisocyanate added is 12%, the amount of graphite added is 0.1%, and the amount of adhesive added is 0%. The same: the stirring rate and stirring time are unchanged.

[0038] The prepared material conducts heat conduction quickly after the temperature is 25s-35s.

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Abstract

The invention discloses a preparation method of a high-effect composite polyurethane phase change material. The preparation method comprises the following steps: (1) taking 88-99.99% of polyhydric alcohols, adding 0.01-5% of a catalyst and 0-7% of a chain extender, stirring and performing reaction at a constant temperature to obtain a prepolymer A; (2) adding 5-25% of diisocyanate or polyisocyanates into the prepolymer A, and stirring and performing reaction at a constant temperature to obtain a prepolymer B; (3) adding 0.1-10% of a high-effect conductive filler additive into the prepolymer B,and stirring and performing reaction at a constant temperature to obtain a prepolymer C; (4) adding 0-30% of an adhesive into the prepolymer C, and continuously stirring at a constant temperature until the material is completely dissolved. The polymer material prepared in the invention is combined with fibers and the like; when external humidity is increased, the polymer can rapidly absorb heat,and temperature rise of the fibers is delayed; when the external humidity is decreased, the polymer rapidly releases heat, and cooling of the fibers is delayed. The material is diversified in varietyin actual application and has excellent performance and wide application.

Description

Technical field: [0001] The invention relates to the field of phase change materials, in particular to a high-efficiency composite polyurethane phase change material and a preparation method thereof. Background technique: [0002] With energy saving and environmental protection being paid more and more attention by various countries. Due to the increasing gap between energy supply and demand, there is inconsistency in many energy utilization systems (such as solar energy, wind energy, carbon energy, etc.), resulting in irrational energy utilization and a lot of waste. People's understanding and research on heat storage materials, especially phase change heat storage materials, is something that happened in recent decades. As the basis of energy storage technology, phase change energy storage materials have been greatly developed at home and abroad. At present, most mature phase change materials are mainly solid-liquid phase change materials. However, there will be liquid ...

Claims

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Application Information

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IPC IPC(8): C08G18/32C08G18/42C08G18/66C08K3/36C08K3/08C08K3/22C08K3/04
CPCC08G18/3206C08G18/4238C08G18/664C08G18/6644C08K3/04C08K3/042C08K3/08C08K3/22C08K3/36C08K2003/2227
Inventor 李维治曹斌斌
Owner 李维治
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