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High-performance graphene/nylon 6 alloy and preparation method thereof

A graphene, high-performance technology, applied in the field of polymer material alloy preparation, can solve the problems of unsatisfactory performance of composite materials, insufficient dry toughness, poor resistance to strong acid and strong alkali, etc., to achieve easy industrial continuous production and wide application Prospects, high economic benefits

Active Publication Date: 2020-12-04
泰安市中研复合材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Nylon 6 (PA6) has become one of the most widely used engineering plastics due to its excellent performance, ranking first among the top five engineering plastics, but its resistance to strong acids and alkalis is poor, dry toughness is insufficient, low-temperature impact strength is low, and it is easy to burn, etc. The application of PA6 is greatly limited. In order to overcome the above-mentioned shortcomings of PA6, the method is to use a compatibilizer to alloy PA6, and add the advantages of polymer material performance or cost to PA6 to achieve high performance, high value-added, purpose of low cost
However, its performance improvement is limited, and it still cannot meet the requirements of PA6 alloys in some fields.
[0003] Graphene is a nanomaterial whose molecular structure is a flat carbon layer. It has important application prospects in the fields of materials science, physics, and chemistry. It is considered to be a revolutionary material in the future; The method of modifying nylon provides a new idea; such as patent CN201710249561.9 a kind of nylon 6 / polypropylene / graphene nanocomposite material and its preparation method, wherein the disclosed technical scheme is: prepare modified graphene and caprolactam Graphene / PA6 nanocomposite material is obtained, and then graphene / PA6 nanocomposite material, polypropylene and compatibilizer are mixed and extruded to obtain nylon 6 / polypropylene / graphene nanocomposite material, but the performance of this composite material is difficult satisfactory

Method used

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  • High-performance graphene/nylon 6 alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) According to the mass ratio of 3:2, the graphene oxide solution with a concentration of 1% is mixed evenly with the caprolactam powder, and the excess water is removed through vacuum distillation to obtain a uniform mixed solution;

[0037] (2) Transfer the homogeneous mixed solution prepared in step (1) to the polymerization reactor, stir at 50-200r / min, and heat up to 260°C, keep the pressure at 0.2-2MPa for 4 hours, and discharge the air in the reactor. Vacuumize to 6000Pa, react for 1 hour, keep warm for 1.5 hours, release the material and cool it down;

[0038](3) extract the material cooled in step (2) in boiling water for 12 hours, change the water and repeat 3 times, discharge the unreacted caprolactam in the system, place it in a vacuum oven to dry, extrude and granulate to obtain graphene / nylon 6 Resin, the mass percent composition of graphene oxide in described graphene / nylon 6 resin is 1.9%;

[0039] (4) Graphene / nylon 6 resin and nylon 6 obtained by st...

Embodiment 2

[0043] (1) According to the mass ratio of 3:5, the graphene oxide solution with a concentration of 2% and the caprolactam powder are mixed evenly, and excess water is removed through vacuum distillation to obtain a uniform mixed solution;

[0044] (2) Transfer the homogeneous mixed solution prepared in step (1) to the polymerization reactor, stir at 50-200r / min, and heat up to 260°C, keep the pressure at 0.2-2MPa for 4 hours, and discharge the air in the reactor. Vacuumize to 6000Pa, react for 1 hour, keep warm for 1.5 hours, release the material and cool it down;

[0045] (3) extract the material cooled in step (2) in boiling water for 12 hours, change the water and repeat 3 times, discharge the unreacted caprolactam in the system, place it in a vacuum oven to dry, extrude and granulate to obtain graphene / nylon 6 Resin, the mass percent composition of graphene oxide in described graphene / nylon 6 resin is 1.5%;

[0046] (4) get the graphene / nylon 6 resin and nylon 6 that step...

Embodiment 3

[0050] According to the weight ratio of 4:5, the graphene oxide solution with a concentration of 1.5% and the caprolactam powder are mixed evenly, and the excess water is removed by vacuum distillation to obtain a uniform mixed solution;

[0051] (2) Transfer the homogeneous mixed solution prepared in step (1) to the polymerization reactor, stir at 50-200r / min, and heat up to 260°C, keep the pressure at 0.2-2MPa for 4 hours, and discharge the air in the reactor. Vacuumize to 6000Pa, react for 1 hour, keep warm for 1.5 hours, release the material and cool it down;

[0052] (3) extract the material cooled in step (2) in boiling water for 16 hours, change the water and repeat 4 times, discharge the unreacted caprolactam in the system, place it in a vacuum oven to dry, extrude and granulate to obtain graphene / nylon 6 Resin, the mass percent composition of graphene oxide in described graphene / nylon 6 resin is 2.1%;

[0053] (4) get the graphene / nylon 6 resin and nylon 6 that step ...

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Abstract

The invention discloses a high-performance graphene / nylon 6 alloy and a preparation method thereof. The alloy comprises graphene / nylon 6 master batch, a nylon 6 elastomer, a high polymer material, a compatibilizer and an antioxidant, and the graphene / nylon 6 master batch is graphene / nylon 6 resin prepared through in-situ polymerization on a graphene oxide sheet layer, and blending and extruding the graphene / nylon 6 resin and nylon 6 to obtain the graphene / nylon 6 composite material. The alloy is prepared by blending and extruding the graphene / nylon 6 master batch, the nylon 6 elastomer, the high polymer material, the compatibilizer and the antioxidant, the alloy has more excellent mechanical properties such as better notch impact strength, tensile strength and bending strength, on the basis, due to the synergistic effect of graphene and nylon 6 elastomer, the alloy has ultrahigh toughness, the production process of the product is simple, industrial continuous production is easy, and the production cost is low. Wide application prospects are realized, and higher economic benefits are realized.

Description

【Technical field】 [0001] The invention relates to the technical field of polymer material alloy preparation, in particular to a high-performance graphene / nylon 6 alloy and a preparation method thereof. 【Background technique】 [0002] Nylon 6 (PA6) has become one of the most widely used engineering plastics due to its excellent performance, ranking first among the top five engineering plastics, but its resistance to strong acids and alkalis is poor, dry toughness is insufficient, low-temperature impact strength is low, and it is easy to burn, etc. The application of PA6 is greatly limited. In order to overcome the above-mentioned shortcomings of PA6, the method is to use a compatibilizer to alloy PA6, and add the advantages of polymer material performance or cost to PA6 to achieve high performance, high value-added, purpose of low cost. However, its performance improvement is limited, and it still cannot meet the requirements of PA6 alloys in some fields. [0003] Graphene ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L87/00C08L23/16C08L51/04C08L51/00C08L23/08C08L51/06C08L67/04C08L51/08C08L25/06C08K5/134C08K3/04
CPCC08L77/02C08L2205/035C08L2201/04C08K2201/011C08K2201/001C08K2201/017C08L87/005C08L23/16C08L51/04C08L51/003C08K5/1345C08K3/042C08L23/0853C08L51/06C08L67/04C08L51/08C08L25/06
Inventor 潘凯桂源陈向阳黄国桃
Owner 泰安市中研复合材料科技有限公司
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