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High-strength high-modulus graphene/nylon 6 fiber and preparation method

A high-strength, high-modulus, graphene technology, applied in fiber chemical characteristics, melt spinning, rayon manufacturing, etc., can solve problems such as uneven dispersion, increased screw torque, and clogging, and achieve good bonding and avoid clogging effects

Active Publication Date: 2017-06-30
HANGZHOU GAOXI TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, whether nylon 6 / graphene composites can be industrially spun to prepare high-strength and high-modulus composite fibers faces the following two obstacles: 1. Graphene is a two-dimensional sheet structure. If the added graphene is a multi-layer structure, it is easy to Uneven dispersion occurs stacking, blocking the extremely small spinning nozzle hole; 2. On the other hand, single-layer graphene is a two-dimensional nanomaterial with a large specific surface area, so the viscosity-increasing effect of single-layer graphene on nylon 6 Obviously, if the melt viscosity of the composite material is too high, on the one hand, the torque of the screw in the spinning equipment will be increased to increase the energy consumption;
Therefore, even though single-layer graphene has excellent reinforcing effect, it has not been applied in the field of high-strength and high-modulus industrial yarns.

Method used

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  • High-strength high-modulus graphene/nylon 6 fiber and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Add 0.1 parts by mass of single-layer graphene with a carbon-to-oxygen ratio of 2.8 and a lateral size of 3 μm, 0.07 parts by mass of a molecular weight regulator, and 10 parts by mass of deionized water into 100 parts by mass of caprolactam melt, at 80 ° C at a high speed (400rpm) stirring and mixing to form a dispersion; under the protection of nitrogen, the above dispersion was heated to 250°C in a polycondensation reactor, reacted at 0.7Mpa for 3 hours, and then reacted under vacuum for 4 hours to obtain a polycondensate melt; Then the polymer melt is water-cooled and granulated to obtain the graphene / nylon 6 nanocomposite material. The obtained graphene / nylon 6 nanocomposite material is uniformly dispersed with 0.5 parts of various additives at 295°C, the spinning speed is 1500 m / min, and the draw ratio is 5 times the condition for high-speed melt spinning to obtain graphene / nylon 6 nanocomposites. Nylon 6 fiber. The mechanical properties of graphene / nylon 6 fiber...

Embodiment 2

[0021] Add 0.3 parts by mass of single-layer graphene with a carbon-to-oxygen ratio of 3.0 and a lateral size of 3 μm, 0.1 parts by mass of a molecular weight regulator, and 10 parts by mass of deionized water into 100 parts by mass of caprolactam melt, and heat at 80 ° C at a high speed (400rpm) stirring and mixing to form a dispersion; under the protection of nitrogen, the above dispersion was heated to 250°C in a polycondensation reactor, reacted at 0.7Mpa for 3 hours, and then reacted under vacuum for 4 hours to obtain a polycondensate melt; Then the polymer melt is water-cooled and granulated to obtain the graphene / nylon 6 nanocomposite material. The obtained graphene / nylon 6 nanocomposite material is uniformly dispersed with 0.5 parts of various additives at 295°C, the spinning speed is 2000 m / min, and the draw ratio is 5 times the conditions for high-speed melt spinning to obtain graphene / nylon 6 nanocomposites. Nylon 6 fiber. The mechanical properties of graphene / nylo...

Embodiment 3

[0023] Add 0.2 parts by mass of single-layer graphene with a carbon-to-oxygen ratio of 3.0 and a lateral size of 7 μm, 0.08 parts by mass of a molecular weight regulator, and 10 parts by mass of deionized water into 100 parts by mass of caprolactam melt, and heat at 80 ° C at a high speed (400rpm) stirring and mixing to form a dispersion; under the protection of nitrogen, the above dispersion was heated to 250°C in a polycondensation reactor, reacted at 0.7Mpa for 3 hours, and then reacted under vacuum for 4 hours to obtain a polycondensate melt; Then the polymer melt is water-cooled and granulated to obtain the graphene / nylon 6 nanocomposite material. After the obtained graphene / nylon 6 nanocomposite material and 0.5 parts of various auxiliary agents are uniformly dispersed at 295 ° C, the spinning speed is 2500 m / min, and the draw ratio is 5 times, high-speed melt spinning is carried out to obtain graphene / nylon 6 nanocomposites. Nylon 6 fiber. The mechanical properties of ...

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Abstract

The invention relates to a high-strength high-modulus graphene / nylon 6 fiber and a preparation method, and belongs to the field of high-strength fibers. The high-strength high-modulus graphene / nylon 6 fiber is prepared by polymerizing modified graphene and caprolactam in situ through high-speed melt spinning. A graphene / nylon 6 nano-composite material is prepared by compounding the modified graphene, the caprolactam and various auxiliaries. The melt index of the graphene / nylon 6 nano-composite material ranges from 15 to 25 (2.16kg, 25 DEG C), and continuous high-speed spinning can be realized by melt spinning holes. The obtained graphene / nylon 6 nano-composite fiber has excellent mechanical properties, tensile strength is higher than 8.0cN / dtex, initial modulus is higher than 9GPa, and the graphene / nylon 6 nano-composite fiber can be used for the field of national defense and industry of tire cords, industrial fabrics, fishing nets and cables.

Description

technical field [0001] The invention relates to a high-strength and high-modulus graphene / nylon 6 fiber and a preparation method thereof, belonging to the field of high-strength and high-modulus fibers. Background technique [0002] Polyamide fiber, commonly known as nylon, is the earliest industrialized synthetic fiber in the world. It has excellent strength, wear resistance, and elastic recovery rate. It is widely used in tire cords, industrial fabrics, cables, conveyor belts, and fishing nets. and other industries. It can also be used as a parachute and other military fabrics in national defense. The high-strength and high-modulus properties of nylon 6 are especially needed in the field of these industrial yarns. Pure nylon 6 can no longer meet the industrial needs. In the industry, nylon 6 composite materials are often used to improve the strength and modulus of nylon 6. Early nylon 6 composites were mostly reinforced with glass fiber and nano-montmorillonite, which ha...

Claims

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Application Information

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IPC IPC(8): D01F6/90D01F1/10D01D5/08C08G69/16
CPCC08G69/16D01D5/08D01F1/10D01F6/90
Inventor 高超韩燚陈琛
Owner HANGZHOU GAOXI TECH CO LTD
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