Preparation method of polymer modified graphene composite material

A graphene composite and composite material technology, which is applied in the field of preparation of polymer-modified graphene composite materials, can solve problems such as bonding, graphene dispersion interface, and distance, and achieves simple preparation process and improved tensile modulus. , easy-to-control effects

Inactive Publication Date: 2018-09-14
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, polymer/graphene composites are generally prepared by solution, melt mixing, and in-situ polymerization. However, due to the easy aggregation of graphene, so fa

Method used

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  • Preparation method of polymer modified graphene composite material

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Example Embodiment

[0033] Example 1

[0034] Add 3.0kg of graphite oxide and 1600kg of water into the ultrasonic irradiation reactor. Under the conditions of ultrasonic power of 300W, frequency of 300Hz, and temperature of 50℃, ultrasonic dispersion is carried out for 2 hours to obtain a graphite oxide solution, which is added to the graphite oxide solution 1kg of triethylenetetramine, continue to ultrasonically disperse for 1h, then stir and react at 40℃ for 20 hours, then centrifuge and wash, the centrifugal speed is controlled at 10000r / min, wash to neutral, and finally dry at 80℃ to constant weight, obtain Modified graphene;

[0035] Add 2.5kg of modified graphene and 1600kg of water into a reactor equipped with an ultrasonic generator, with an ultrasonic power of 200W, a frequency of 200Hz, a temperature of 40℃, and ultrasonic dispersion for 1 hour to obtain a modified graphene solution. Add natural rubber latex 32.3kg, continue ultrasonic dispersion for 1 hour to obtain a natural rubber latex / ...

Example Embodiment

[0038] Example 2

[0039] Add 100kg of modified graphene and 3000kg of ethanol into an ultrasonic cleaning machine for 1.5 hours of ultrasound to obtain a modified graphene solution, add 300kg of polymethyl methacrylate emulsion, ultrasound for 1.5 hours, then add 8kg of sodium borohydride solution, Continue to sonicate for 2 hours to obtain a polymethyl methacrylate / modified graphene composite emulsion. Demulsify the emulsion with 30 kg of sodium chloride solution at a temperature of 100°C for 60 minutes. The product is dried to a constant weight under a vacuum of 0.1MPa and a temperature of 230°C to obtain a polymethyl methacrylate / modified graphene composite masterbatch.

[0040] 34kg of polymethyl methacrylate coated modified graphene, 70kg of polymethyl methacrylate, 13kg of bis(tribromophenoxy)ethane and 7kg of lead trioxide were extruded to prepare polymethylmethacrylate Ester / modified graphene composite material, the extrusion temperature is 200℃.

Example Embodiment

[0041] Example 3

[0042] Add the modified graphene 0.01kg and 100kg DMF into the ultrasonic irradiation reactor, start the ultrasonic cell crusher, the ultrasonic power is 10000W, the frequency is 20000Hz, the temperature is 60℃, the ultrasonic dispersion time is 30 minutes, and the modified graphene solution is obtained. Add 5 kg of EVA latex, continue ultrasonication for 30 minutes, add 4 kg of ethylene diamine, continue ultrasonication for 3 hours, to prepare a stable EVA / modified graphene composite emulsion. Use 1 kg of sodium sulfate solution to demulsify at a temperature of 10°C for 1 minute. The product is dried to a constant weight at a vacuum of 0.05MPa and a temperature of 50°C to obtain an EVA / modified graphene composite masterbatch.

[0043] 21kg of EVA coated modified graphene, 80kg of EVA, 20kg of calcium carbonate and 3kg of stearic acid were first extruded and mixed uniformly through a twin-screw extruder, and the extrusion temperature was 180°C. Granulation, dryi...

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Abstract

The invention discloses a preparation method of a polymer modified graphene composite material. The preparation method includes the steps: firstly, preparing graphite oxide in an ultrasonic radiationreactor into modified graphene by modifiers; secondly, dispersing the modified graphene into polymer emulsion to prepare stable polymer/modified graphene composite emulsion; thirdly, adding emulsion breakers into the composite emulsion to obtain polymer/modified graphene composite master batches; finally, adding the master batches, polymers and various auxiliary materials into an extruder, meltingthe materials at a certain temperature and extruding the materials to obtain the polymer/modified graphene composite material. Performances such as the tensile strength and the tensile modulus of thecomposite material are good, the preparation method is simple in preparation process, low in reaction temperature, easy to control and low in energy consumption, waste gas and waste liquid are avoided in the production process, and the preparation method is environmentally friendly.

Description

technical field [0001] The invention belongs to the field of composite material preparation, and in particular relates to a preparation method of a polymer-modified graphene composite material. Background technique [0002] Graphene is a new carbonaceous material with a two-dimensional honeycomb lattice structure formed by sp2 hybridized carbon atoms closely packed, with a thickness of one or more atomic layers, and can be divided into one or more layers according to the number of layers Graphene. Theoretical research on graphene has a history of more than 60 years, and until 2004, two-dimensional graphene sheets that can truly exist independently were obtained by Novoselov at the University of Manchester in the United Kingdom by using tape to peel off highly oriented graphite. So far, graphene has been prepared by the following methods: 1) chemical vapor deposition (Eizenberg M., Blakely J.M.Surf.Sci.1970, 82, 228-236.); 2) epitaxial growth (Berger C. Song Z., Li X., Wu X...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L33/12C08L23/08C08L9/02C08L9/06C08L55/02C08K13/06C08K9/10C08K9/04C08K3/04C08K3/22C08K5/09C08J3/22C08J3/215
CPCC08J3/215C08J3/226C08J2307/00C08J2309/02C08J2323/08C08J2333/12C08J2407/00C08J2409/02C08J2423/08C08J2433/12C08K2003/2234C08K2003/2296C08L7/00C08L9/02C08L23/0853C08L33/12C08L9/06C08L55/02C08K13/06C08K9/10C08K9/04C08K3/042C08K3/22C08K5/09
Inventor 夏和生张开业王健郝帅
Owner SICHUAN UNIV
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