High-barrier oxidized graphene/nylon 6 extended-chain crystal and preparation method

A technology of graphene and extended chain, which is applied in the field of high-barrier graphene oxide/nylon 6 extended chain crystal and its preparation, can solve the problem that the barrier property cannot meet the industrial requirements, achieve strong practical significance and industrial value, and strengthen the barrier Effect, effect of increasing crystallinity and crystallization rate

Inactive Publication Date: 2017-01-04
HUBEI UNIV OF AUTOMOTIVE TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the defect that the barrier properties of nylon 6 cannot meet the industrial requirements when it is applied in the field of packaging materials, the present invention adopts an in-situ synthesis method to prepare graphene oxide / nylon 6 composite materials, so that graphene oxide can be uniformly dispersed in nylon 6 and evenly dispersed Graphene oxide can be used as a nucleating agent to induce the crystallization of nylon 6, which can increase the crystallinity and crystallization rate, and strengthen the barrier effect

Method used

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  • High-barrier oxidized graphene/nylon 6 extended-chain crystal and preparation method
  • High-barrier oxidized graphene/nylon 6 extended-chain crystal and preparation method
  • High-barrier oxidized graphene/nylon 6 extended-chain crystal and preparation method

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Embodiment 1

[0030] Example 1 The first step is the preparation of graphene oxide / nylon 6 composite material by in-situ synthesis method: put 1 part of graphene oxide and 99 parts of caprolactam into a flask, and ultrasonicate the mixture for 60 minutes at room temperature to obtain graphite oxide A mixed solution of graphene oxide and monomeric caprolactam; add the catalyst aminocaproic acid, install a mechanical stirring device and pass in an inert gas; while stirring, heat the mixture of graphene oxide and caprolactam to 170°C and keep it warm for 1h , then raise the temperature to 240°C and keep it warm for 4 hours to complete the in-situ polymerization; after the reaction, pour the melt into a surface container, wash it with boiling water for 3 times to remove monomers and low molecular weight oligomers, and obtain oxidation after drying. Graphene / nylon 6 composite.

[0031] The second step is the acquisition of high-barrier graphene oxide / nylon 6 extended chain crystals: put the grap...

Embodiment 2

[0032] Example 2 According to the preparation method of Example 1, except that the pressure in the second step was changed from 200 MPa to 250 MPa, the extended chain graphene oxide / nylon 6 crystal was also obtained.

Embodiment 3

[0033] Example 3 According to the preparation method of Example 1, except that the pressure in the second step was changed from 200MPa to 360MPa, the extended chain graphene oxide / nylon 6 crystal was also obtained.

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Abstract

The invention discloses a high-barrier oxidized graphene / nylon 6 extended-chain crystal and a preparation method. In order to overcome the defect that when PA6 is adopted as a packaging material, the barrier property cannot meet the requirement for industrial application, the method comprises the steps that an oxidized graphene / nylon 6 composite material is synthesized through an in-situ polymerization method, and a high-pressure and high-temperature method is adopted for preparing the oxidized graphene / nylon 6 extended-chain crystal. The crystal material combines the barrier advantages of oxidized graphene, nylon 6 and extended-chain crystals, has the excellent solvent and gas barrier performance, and has the wide application prospect in the field of packaging materials with the high requirement for the barrier performance.

Description

technical field [0001] The invention relates to the technical field of nylon modification and polymer processing, in particular to a high-barrier graphene oxide / nylon 6 extended chain crystal and a preparation method. Background technique [0002] Nylon 6 is a high-performance engineering plastic with excellent comprehensive properties, good barrier properties to non-polar solvents and gases, but poor barrier properties to polar solvents such as water molecules. Nylon 6 has always been an important barrier material for multilayer composite films, but there are still defects in many occasions that the barrier properties cannot meet the industrial needs. [0003] Graphene oxide has excellent mechanical properties. It is an impermeable material with a single-layer two-dimensional carbon skeleton, which can greatly extend the path of water vapor and gas small molecules through the composite film, thereby achieving the purpose of barrier. The nylon prepared by the general moldin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/16C08G69/46C08K9/00C08K3/04
CPCC08G69/16C08G69/46C08K3/04C08K9/00C08K2201/008
Inventor 杨旭宇刘平涛
Owner HUBEI UNIV OF AUTOMOTIVE TECH
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