Method for preparing rubber nanocomposite by peeling expanded graphite through in-situ reaction

A technology of expanded graphite and composite materials, which is applied in the field of rubber products, can solve problems such as the difficulty of uniform dispersion of graphene, and achieve the effects of reducing van der Waals force, easy industrialization, and good mechanical properties

Active Publication Date: 2017-03-15
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has no introduction of solvent, is suitable for both polar and non-polar rubbers, and has low cost and simple process flow, and is widely used in industrial production, but the preparation of graphene / rubber composites by mechanical mixing method faces a relatively difficult problem. The big problem is that the high specific surface area and surface energy of graphene and the high viscosity of rubber make it difficult to uniformly disperse graphene in the rubber matrix

Method used

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  • Method for preparing rubber nanocomposite by peeling expanded graphite through in-situ reaction
  • Method for preparing rubber nanocomposite by peeling expanded graphite through in-situ reaction
  • Method for preparing rubber nanocomposite by peeling expanded graphite through in-situ reaction

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Effect test

Embodiment 1

[0026] First, 1 part (refer to parts by mass, the same below) of expanded graphite and 10 parts of 2-methoxythiophene are added to tetrahydrofuran, ultrasonically (400W ultrasonic cleaner, the same below) and stirred for 20min, then heated to remove tetrahydrofuran and dried to obtain A mixture of expanded graphite and methoxythiophene; masticate 100 parts of hydrogenated nitrile rubber in a Haake internal mixer for 3 minutes, set the speed at 130 rpm, and set the temperature at 100 ° C. When the torque becomes stable, add 0.2 Parts of ferric chloride, the temperature rises to 130°C, then add the mixture of graphite and thiophene which removes tetrahydrofuran, and react at 130°C for 40min. After the reaction is finished, cool down to room temperature and take out the product from the internal mixer to obtain the product. Finally, the product was hot-pressed by a flat vulcanizer at 160°C to obtain a composite material, and the dispersion test was carried out with a scanning ele...

Embodiment 2

[0032] First, 3 parts of expanded graphite and 30 parts of maleic anhydride are added to tetrahydrofuran, ultrasonicated and stirred for 50 minutes, then heated to remove tetrahydrofuran and dried to obtain a mixture of expanded graphite and maleic anhydride; 100 parts by mass of hydrogenated nitrile rubber in banburying Masticate in the machine for 3 minutes, set the speed at 130 rpm, and set the temperature at 120°C. When the torque becomes stable, add 0.8 parts of zinc tetrafluoroborate, raise the temperature to 160°C, and then add graphite and maleic acid that remove tetrahydrofuran. A mixture of acid anhydrides was reacted at 160°C for 48 minutes. After the reaction is finished, cool down to room temperature and take out the product from the internal mixer to obtain the product. Finally, the product is hot-pressed at 160°C through a flat vulcanizer to obtain a composite material; the leftovers are dissolved in a solvent, and the solution is diluted with tetrahydrofuran, a...

Embodiment 3

[0034] First, 5 parts of expanded graphite and 50 parts of itaconic anhydride are added to tetrahydrofuran, ultrasonically stirred for 60 minutes, then heated to remove tetrahydrofuran and dried to obtain a mixture of expanded graphite and itaconic anhydride; 100 parts of hydrogenated nitrile rubber in a mixer Medium masticating for 3 minutes, the speed is set at 130 rpm, the temperature is set at 125°C, when the torque becomes stable, add 1 part of aluminum chloride, the temperature rises to 170°C, and then add the mixture of graphite and itaconic anhydride that removes tetrahydrofuran , 170°C for 52min. After the reaction is finished, cool down to room temperature and take out the product from the internal mixer to obtain the product. Finally, the product is hot-pressed at 160°C through a flat vulcanizer to obtain a composite material; the leftovers are dissolved in a solvent, and the solution is diluted with tetrahydrofuran, and centrifuged on a high-speed centrifuge to pur...

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Abstract

The invention relates to a method for preparing a rubber nanocomposite by peeling expanded graphite through an in-situ reaction. In an internal mixer, hydrogenated butadiene-acrylonitrile rubber, expanded graphite and diene or dienophile undergo a Diels-Alder reaction, and strong shearing force transmitted by rubber is employed, so chemically-modified expanded graphite is peeled in situ to prepare graphene, and the graphene / rubber nanocomposite is prepared in situ. The method has the advantages of mild reaction conditions, simple process and low energy consumption; almost no organic solvent is used in reaction process, so small pollution is posed to the environment; and the prepared graphene has good electrical conductivity and thermal conductivity, and the prepared rubber nanocomposite has excellent electrical conductivity.

Description

[0001] Technical field: [0002] The invention relates to a method for preparing rubber nanocomposite materials by exfoliating expanded graphite by in-situ reaction. It belongs to the technical field of rubber products. [0003] Background technique: [0004] Graphene, as a new type of carbon-based filler, has been successfully applied to the nano-modification of rubber to prepare rubber nanocomposites. Graphene is a new carbonaceous material with a two-dimensional honeycomb lattice structure formed by sp2 hybridized carbon atoms, which can be single or several layers thick. In 2004, British scientists Geim and Novoselov confirmed the existence of graphene single crystals theoretically, and used the method of stripping highly oriented graphite with tape to obtain two-dimensional graphene sheets that can truly exist independently. The upsurge of engineering applications. Compared with carbon nanotubes (CNTs), graphene has more excellent performance, such as the room temperatur...

Claims

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Application Information

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IPC IPC(8): C08L15/00C08K9/04C08K7/24
CPCC08K7/24C08K9/04C08K2201/001C08L15/005
Inventor 田明冯展彬宁南英张立群伊海萍
Owner BEIJING UNIV OF CHEM TECH
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