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Method for preparing polyphenylene sulfide/graphene composite material

A graphene composite and polyphenylene sulfide technology, applied in the field of chemical synthesis, can solve the problems of poor dispersion of reduced graphene, and achieve the effects of easy regulation of molecular distribution, small amount of solvent, and high temperature resistance

Active Publication Date: 2015-09-30
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the conductivity, UV resistance, oxidation resistance and friction resistance of graphene oxide are far inferior to those of reduced graphene, compared with graphene oxide, reduced graphene has poor dispersion performance.

Method used

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  • Method for preparing polyphenylene sulfide/graphene composite material
  • Method for preparing polyphenylene sulfide/graphene composite material
  • Method for preparing polyphenylene sulfide/graphene composite material

Examples

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preparation example Construction

[0015] The invention provides a kind of preparation method of polyphenylene sulfide / graphene composite material, it is characterized in that described preparation method comprises the following steps:

[0016] (1) Add 5-10 g of graphene oxide and 85-100 g of PPS into 100-200 mL of solvent A, heat and stir at 220-300 ° C until the graphene oxide and PPS are fully dissolved to obtain a dispersion of graphene oxide and PPS;

[0017] (2) Add 0.1-2mol reducing agent to the graphene oxide and PPS dispersion obtained in step (1), react at 220-300°C for 0.1-4h, obtain reduced graphene and PPS dispersion, cool to 150-190°C , filter the reduced graphene and PPS dispersion, wash the filter cake to remove the solvent A and the remaining reducing agent, and dry at 80-260°C for 0.5-96h to obtain the graphene / PPS composite material.

[0018] Above-mentioned steps (1), (2) are to react under normal pressure-50 standard atmospheric pressure.

[0019] The solvent A is N-alkyl caprolactams such...

Embodiment 1

[0024] In a 0.5L three-neck flask, add 5g graphene oxide, 95gPPS and 200ml caprolactam, heat to 240°C under mechanical stirring, after the graphene oxide and PPS are fully dissolved, add 20g vitamin C to the reaction solution, then keep it for 30min, mix The solution turns from light yellow or brownish yellow to black solution, stop heating, and when the mixed solution is cooled to 180°C, filter the solution with 200-400 mesh steel wire mesh, wash the filter cake with ethanol and ion water for 2-3 times respectively, and then filter the solution at 180°C ℃ vacuum drying for 12 hours to obtain graphene / PPS composite material powder.

[0025] After the composite material powder is granulated, it is spun at 320°C to prepare graphene / PPS composite fibers. The composite fibers are heat-set in hot water at 100°C and drawn 3 times at 170°C. When the composite fiber was irradiated by a 45-watt xenon lamp for 12 hours, no decline in the mechanical properties of the fiber was observed, ...

Embodiment 2

[0028] In a 0.5L autoclave (5MPa), add 5g graphene oxide, 95gPPS and 200ml N-methylpyrrolidone, replace the air in the autoclave with nitrogen four times, heat to 280°C under mechanical stirring, after heating for 0.5h, dissolve 50ml Add 20g of vitamin C N-methylpyrrolidone solution into the reaction kettle with a metering pump, then keep it for 30 minutes, stop heating, and when the mixture is cooled to 180°C, filter the solution with 200-400 mesh steel mesh, and filter the cake with ethanol and ion After washing with water for 2 to 3 times, vacuum drying was carried out at 180°C for 12 hours to obtain graphene / PPS composite material powder.

[0029]After the composite material powder is granulated, it is spun at 320°C to prepare graphene / PPS composite fibers. The composite fibers are heat-set in hot water at 100°C, and hot-drawn at 170°C for 3 times. When the composite fiber was irradiated by a 45-watt xenon lamp for 12 hours, no decline in the mechanical properties of the f...

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Abstract

The invention discloses a method for preparing a polyphenylene sulfide / graphene composite material. The method comprises first utilizing graphene oxide and polyphenylene sulfide (PPS) which are good in dispersing performance as raw materials, dissolving graphene oxide and PPS in an organic solvent or performing high dispersion on the conditions of heating, adding a reducing agent in a formed system, performing in-situ reduction of graphene oxide, utilizing the nonbonding acting force between graphene oxide and PPS to restrain graphene agglomeration in the reduction process, performing filtration reduction of graphene and PPS dispersion liquid, cleaning a filter cake, and drying the filter cake to obtain the PPS / graphene composite material. The preparation method is simple and practical, the prepared PPS / graphene composite material is greatly improved in abrasion resistance, antioxidation, ultraviolet resistance, high temperature resistance and corrosion resistance, and the processability of PPS is not affected.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a method for preparing a polyphenylene sulfide (PPS) / graphene composite material. Background technique: [0002] PPS is an engineering material with corrosion resistance, high temperature resistance, radiation resistance, flame retardancy, and good mechanical properties for electrical insulation. It is used in aerospace, automobile manufacturing, chemical instrumentation, etc. PPS has excellent flame retardancy, high temperature resistance and solvent resistance, and can be used continuously for a long time at 200-240°C; it has low hygroscopicity and does not deform under high temperature and high humidity conditions. Therefore, PPS fiber is recognized as a good filter bag material, but from the inherent physical properties of PPS, there are still many shortcomings when used as a filter bag material for bag filter. In view of the problems existing in PPS materials, modification...

Claims

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Application Information

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IPC IPC(8): C08L81/02C08K3/04
CPCC08K3/04C08L2201/08C08L81/02
Inventor 李振环樊海彬苏坤梅
Owner TIANJIN POLYTECHNIC UNIV
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