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Graphene masterbatch for thermally conductive and insulating nylon plastic and preparation method thereof

A nylon plastic, heat conduction and insulation technology, applied in the field of plastic masterbatch, can solve the problems of uneven coating of graphene, poor insulation effect, complicated preparation process, etc., to avoid direct contact with silica gel matrix, easy to promote, The effect of simple preparation process

Inactive Publication Date: 2019-01-11
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the insulating filler-graphene composite filler in the prior art and the preparation method of graphene thermally conductive and insulating composite plastics have the defect of uneven coating of graphene, resulting in poor insulation effect, and often need to use organic solvents , not conducive to environmental protection, and there are problems such as complicated preparation process and high cost

Method used

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  • Graphene masterbatch for thermally conductive and insulating nylon plastic and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Dissolve 18kg of aluminum isopropoxide in 82kg of methanol to prepare an aluminum alkoxide / alcohol solution; then add 7kg of surface-treated graphene microchips to 67kg of aluminum alkoxide / alcohol solution, stir for 50min at 500r / min, and mix Evenly, add 26kg of distilled water during the stirring process to hydrolyze the aluminum alkoxide and form a gel to coat the surface of the graphene microchip; then the hydrolyzed product is atomized and dried, then pulverized, and the temperature is increased to 300 at a temperature of 17℃ / min Calcined at ℃ for 10 minutes to obtain alumina-coated graphene composite particles; finally, 28kg alumina-coated graphene composite particles were melt-mixed with 1kg sodium alkyl sulfonate, and then mixed with 69kg nylon carrier and 2kg methylene double Sodium naphthalene sulfonate is melt-extruded and pelletized by a twin-screw extruder to prepare graphene masterbatch for thermally conductive insulating nylon plastic.

[0030] testing metho...

Embodiment 2

[0036] Dissolve 10 kg of aluminum isopropoxide in 90 kg of ethanol to prepare an aluminum alkoxide / alcohol solution; then add 5 kg of surface-treated graphene microchips to 75 kg of aluminum alkoxide / alcohol solution, stir at 300r / min for 60 minutes, and mix Evenly, add 20kg of distilled water during the stirring process to hydrolyze the aluminum alkoxide and form a gel to coat the surface of the graphene microchip; then the hydrolyzed product is atomized and dried, then crushed, and the temperature is increased to 350 at a temperature of 15°C / min Calcined at ℃ for 15 minutes to obtain alumina-coated graphene composite particles; finally, 20 kg of alumina-coated graphene composite particles and 1 kg of sodium alkylbenzene sulfonate were melt-mixed, and then mixed with 78 kg of nylon carrier and 1 kg of methylene Sodium bis-methyl naphthalene sulfonate is melted, extruded and pelletized by a twin-screw extruder to prepare graphene masterbatch for thermally conductive insulating n...

Embodiment 3

[0039] Dissolve 30kg of aluminum isopropoxide in 70kg of isopropanol to prepare an aluminum alkoxide / alcohol solution; then add 10kg of surface-treated graphene microchips to 60kg of aluminum alkoxide / alcohol solution, and stir at 600r / min for 30min , Mix well, add 30kg of distilled water during the stirring process to hydrolyze the aluminum alkoxide and form a gel to coat the surface of the graphene microchip; then the hydrolyzed product is atomized and dried, then crushed, and the temperature is increased at a temperature of 20°C / min Calcined at 300℃ for 10 minutes to obtain alumina-coated graphene composite particles; finally, 40kg alumina-coated graphene composite particles and 2kg sodium alkylnaphthalene sulfonate were melt-mixed, and then mixed with 56kg nylon carrier and 2kg ethylene -Acrylic acid copolymer is melt-extruded and pelletized by a twin-screw extruder to prepare graphene masterbatch for thermally conductive insulating nylon plastic.

[0040] The test method is ...

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Abstract

The invention belongs to the technical field of a graphene masterbatch, and provides a graphene masterbatch for thermally conductive and insulating nylon plastic and a preparation method thereof. Themethod comprises the following steps: forming a gel-coated graphene microchip by hydrolysis of aluminium isopropoxide, and then performing steps of atomizing drying, pulverizing and calcining to obtain alumina-coated graphene composite particles, mixing the alumina-coated graphene composite particles with a surfactant, a nylon carrier, and a dispersing agent, and performing extrusion granulation to obtain the graphene masterbatch. Compared with the conventional method, the graphene masterbatch prepared by the invention forms an aluminum oxide coating layer on the graphene microchip, which canavoids the direct contact of the graphene microchip and a silica gel matrix, the graphene masterbatch has excellent thermal insulation effect, and does not use an organic solvent harmful to the environment, the method has a simple preparation process, is environmentally friendly, and is easy to popularize.

Description

Technical field [0001] The invention belongs to the technical field of plastic masterbatch and provides a graphene masterbatch for thermally conductive and insulating nylon plastic and a preparation method. Background technique [0002] In recent years, with the development of industrial production and science and technology, high-power electronic and electrical products have developed rapidly, and more and more problems have arisen due to product heating, resulting in reduced product efficacy and shortened service life. Some data show that for every 2°C increase in temperature of electronic components, their reliability decreases by 10%; the lifespan at 50°C is only 1 / 6 of that at 25°C. [0003] Nylon 6 is an excellent thermoplastic engineering plastic with excellent mechanical properties, good electrical properties, wear resistance, oil resistance, solvent resistance and other advantages. It is widely used in automobiles, electronic appliances, machinery and other fields, ...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08K13/06C08K9/10C08K3/22C08K3/04C08K5/42C08J3/22
CPCC08J3/226C08J2477/00C08K3/042C08K5/42C08K9/10C08K13/06C08K2003/2227
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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