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Method for preparing nylon 6-based heat-dissipating composite material through reactive extrusion

A composite material and reactive extrusion technology, applied in the field of reactive extrusion, can solve the problems of heat accumulation, mechanical strength and molding processing performance decline, and achieve the effects of improving interface bonding, excellent molding fluidity, and increasing strength

Inactive Publication Date: 2019-12-10
摩特卡(杭州)进出口贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to make up for the defects of existing heat dissipation plate materials and provide a new type of heat dissipation plate material, which solves the problems of heat accumulation caused by fast heat conduction of metal heat dissipation materials and the decline of mechanical strength and molding performance of traditional heat conduction plastics under high filling.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, a method for preparing nylon 6-based heat dissipation composite material by reactive extrusion:

[0020] Step 1: Use the liquid phase ultrasonic stripping method to disperse 50 grams of expanded graphite in 1000 grams of ethanol solution, and at the same time add a silane coupling agent with a mass fraction of graphite of 3%, ultrasonically disperse for 20 minutes, and the wave frequency is 150~200KHz; at 60 Vacuum drying at ℃ to obtain oligolayer graphene;

[0021] Step 2. Add caprolactam monomer, caprolactam sodium salt, HDI, and treated oligolayer graphene into the reaction kettle at a mass ratio of 1000:90:5:50, and pre-disperse under the action of ultrasonic waves; vacuumize the inside of the kettle temperature to -0.1Mpa, and vacuumize the reactor at 150°C for 15 minutes to remove trace moisture in the reactor; continue stirring for 10 minutes and then add it to an extruder to extrude and granulate to obtain a nylon 6-based graphene composite materia...

Embodiment 2

[0024] Embodiment 2, a method for preparing nylon 6-based heat dissipation composite material by reactive extrusion:

[0025] Step 1: Use the liquid phase ultrasonic stripping method to disperse 100 grams of expanded graphite in 2000 grams of ethanol solution, and at the same time add a silane coupling agent with a graphite mass fraction of 3%, ultrasonically disperse for 20 minutes, and the wave frequency is 150~200KHz; at 60 Vacuum drying at ℃ to obtain oligolayer graphene;

[0026] Step 2. Add caprolactam monomer, caprolactam sodium salt, HDI, and treated oligolayer graphene into the reaction kettle at a mass ratio of 1200:100:5:80, and pre-disperse under the action of ultrasonic waves; vacuumize the inside of the kettle temperature to -0.1Mpa, and vacuumize the reactor at 150°C for 15 minutes to remove trace moisture in the reactor; continue stirring for 10 minutes and then add it to an extruder to extrude and granulate to obtain a nylon 6-based graphene composite material...

Embodiment 3

[0029] Embodiment 3, a method for preparing nylon 6-based heat dissipation composite material by reactive extrusion:

[0030] Step 1: Use the liquid phase ultrasonic stripping method to disperse 100 grams of expanded graphite in 2000 grams of ethanol solution, and at the same time add a silane coupling agent with a graphite mass fraction of 3%, ultrasonically disperse for 20 minutes, and the wave frequency is 150~200KHz; at 60 Vacuum drying at ℃ to obtain oligolayer graphene;

[0031] Step 2. Add caprolactam monomer, caprolactam sodium salt, HDI, and treated oligolayer graphene into the reaction kettle at a mass ratio of 1200:80:10:100, and pre-disperse under the action of ultrasonic waves; vacuumize the inside of the kettle temperature to -0.1Mpa, and vacuumize the reactor at 150°C for 15 minutes to remove trace moisture in the reactor; continue stirring for 10 minutes and then add it to an extruder to extrude and granulate to obtain a nylon 6-based graphene composite materia...

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Abstract

The invention relates to a method for preparing a nylon 6-based heat-dissipating composite material through reactive extrusion. A caprolactam monomer, a ring-opening catalyst caprolactam sodium salt,a cocatalyst HDI hexamethylene isocyanate and oligoblastic graphene with the thickness being 2 to 10 carbon layers are added into a reaction kettle and are pre-dispersed under the ultrasonic action. The in-situ polymerized nylon 6-based heat-dissipating composite material is prepared by the following steps: adding the raw materials into the reaction kettle according to the preferable mass ratio of1200:100:5:80, vacuumizing the reaction kettle at 150 DEG C for 15 minutes when the vacuumized degree of the kettle is -0.1 Mpa, and removing trace water in the reaction kettle; and continuously stirring for 10 minutes, adding into an extruding machine and performing extruding granulation at the temperature of 210 to 230 DEG C. A heat-dissipating substrate obtained by performing injection moldingon the material is used for preparing heat-dissipating devices such as a computer heat-dissipating pedestal and a set-top box heat-dissipating shell.

Description

technical field [0001] The invention relates to the technical field of reactive extrusion, in particular to the technical field of a method for preparing nylon 6-based heat dissipation composite materials by reactive extrusion. Background technique [0002] Reactive extrusion is a kind of extruder as a continuous reactor, the chemical reaction of polymer monomers, fillers and additives inside the extruder, that is, the continuous synthesis of monomer raw materials through reactive extrusion technology The reaction and melt processing of the polymer are integrated, and the desired material or product is formed in one step through a screw extruder. Compared with ordinary extrusion granulation technology, reactive extrusion extrusion granulation technology can improve the interfacial bonding between filler and polymer matrix, improve the dispersion of filler and the strength of composite materials, and achieve polymer modification or incompatibility. In addition, the reaction ...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K9/06C08K3/04C08G69/16
CPCC08G69/16C08K3/042C08K9/06C08L77/02
Inventor 刘威锋董玉田钮博翔
Owner 摩特卡(杭州)进出口贸易有限公司
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