Graphene modified PA6 composite and preparation method thereof

A technology of graphene modification and composite materials, which is applied in the field of highly dispersed modified graphene/PA6 composite materials and its preparation, can solve the problems of low strength, large amount of addition, and poor compatibility of PA6, so as to reduce water absorption, The effect of improving the notched impact strength and improving the mechanical strength

Active Publication Date: 2016-11-16
THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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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 overcome the shortcomings of the existing PA6 composite material, such as large amount of filler addition, poor compatibility with PA6, and low strength, and provide a high-strength PA6 composite material containing modified graphene;

Method used

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  • Graphene modified PA6 composite and preparation method thereof
  • Graphene modified PA6 composite and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1) Weigh 5g of graphene and mix it with 25g of silane coupling agent KH550, pour into 10L of ethanol solvent, add 2.5g of polymer dispersant in advance in the ethanol solvent, put the above graphene solution at a temperature of 45°C, stirring at a speed of Under the condition of 400rpm, react for 4 hours, wash the obtained modified graphene, place it in a vacuum drying oven, and dry it at 50°C until the solvent evaporates completely to obtain modified graphene, which is ready for use.

[0046] 2) Take 2 g of the modified graphene prepared in step 1), configure it into a 1 mg / ml formic acid solution, disperse it ultrasonically for 45 minutes, weigh 500 g of PA6 resin, and add it to the above modified graphene solution, at 25 ° C, 400 rpm The PA6 is heated and dissolved completely, dried, and pulverized to obtain a modified graphene / PA6 powder, which is ready for use.

[0047] 3) The modified graphene / PA6 powder obtained in step 2) is mixed with PA6 resin 9500g, compatibi...

Embodiment 2

[0049] 1) Take 8g graphene oxide by weighing and mix with 800g cetyltrimethylammonium bromide, pour into 20L water solvent, add 2.5g polymer type dispersant in advance in water solvent, put above-mentioned graphene oxide solution in The temperature was 80°C, the stirring speed was 500rpm, and the reaction was carried out for 8 hours to obtain modified graphene oxide. After washing, it was placed in a vacuum drying oven, and dried at 100°C until the water evaporated completely, and it was ready for use.

[0050] 2) Take 6g of the modified graphene oxide prepared in step 1) and configure it into a 1mg / ml mixed solution of ethanol and formic acid, disperse it ultrasonically for 60min, weigh 800g of PA6 resin, add it to the above-mentioned modified graphene oxide solution, and heat it at 40°C , under the condition of 600rpm, PA6 is heated and dissolved completely, dried, and pulverized to obtain modified graphene oxide / PA6 powder, which is ready for use.

[0051] 3) The modified g...

Embodiment 3

[0053] 1) Mix 10g of graphene with 50g of silane coupling agent KH550, pour into 10L of ethanol and water solvent, add 2g of polymer dispersant in advance in ethanol and water solvent, and put the graphene solution above at a temperature of 45°C , under the condition of a stirring speed of 800rpm, reacted for 4 hours, washed the obtained modified graphene, placed in a vacuum drying oven, and dried at 50°C until the solvent evaporated completely, ready for use.

[0054] 2) Take 15g of the modified graphene obtained in step 1) and configure it into a 1mg / ml formic acid solution, ultrasonically disperse it for 45min, weigh 500g of PA6 resin, add it to the modified graphene solution, and heat the PA6 at 25°C and 600rpm Dissolve completely, dry, and pulverize to obtain modified graphene / PA6 powder, which is ready for use.

[0055] 3) Take by weighing 10g graphene oxide and mix with 100g cetyltrimethylammonium bromide, pour into 10L of water solvent, add 2g polymer type dispersant i...

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Abstract

The invention discloses a graphene modified PA6 composite. The graphene modified PA6 composite is prepared from the following components in parts by weight: 100 parts of PA6 resin, 0.02-0.6 part of modified graphene carbon materials, 0.2-0.6 part of an antioxidant and 1.0-5.0 parts of a compatibilizer, wherein the modified graphene carbon materials are modified graphene, modified graphene oxide, or a mixture of the modified graphene and modified graphene oxide. A preparation method of the graphene modified PA6 composite disclosed by the invention comprises the following steps of firstly preparing the modified graphene and the modified graphene oxide, and then premixing the modified graphene and the modified graphene oxide with PA6 composites in a certain proportion. Through the adoption of the method, the modified graphene and the modified graphene oxide can be uniformly dispersed in the PA6 composite, the mechanical properties of the PA6 composite can be obviously improved, besides, the heat stability of the composite is improved, and the water absorption of the composite can also be reduced.

Description

technical field [0001] The invention relates to a highly dispersed modified graphene / PA6 composite material and a preparation method thereof, belonging to the field of polymer composite materials. Background technique [0002] PA6, also known as nylon 6, has the characteristics of thermoplasticity, light weight, good toughness, chemical resistance and durability, and is widely used in the automotive industry, electronic and electrical industries, and civil and industrial fibers. PA6 fiber is one of the varieties with excellent performance and wide application among synthetic fibers. It not only has the common characteristics of synthetic fibers such as corrosion resistance, mildew resistance and low moisture absorption rate, but also has high breaking strength, good wear resistance and good elasticity. The PA6 main chain contains a large number of amide groups -[NHCO]-, which easily form hydrogen bonds with water, causing a decrease in impact strength and elastic modulus. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L51/00C08K9/06C08K9/04C08K3/04C08K5/18
CPCC08L77/02C08L2205/025C08L2205/03C08L51/00C08K9/06C08K3/04C08K5/18C08K9/04
Inventor 郑雅轩张娟娟蒋晓峰瞿研
Owner THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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