Electrical conductivity of thermally reduced graphene oxide/polymer composites with a segregated structure

Li, Mengkai; Chen, Gao; Hu, Hongliang; Zhao, Zhongxing

doi:10.1016/j.carbon.2013.08.016

Cited by 99 publications

(47 citation statements)

References 8 publications

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“…We found the conductivity to increase with increasing graphene loading level, reaching 3 S/m for the 40 vol% sample. This value is higher than the maximum conductivity observed in most papers describing graphene-filled composites which tend to fall in the range 10 -2 -10 S/m [refs [86][87][88][89][90][91][92][93][94]], although at least one paper described conductivities as high as 300 S/m. [95] In addition, this is considerably higher than the best results reported for most nanotube-filled composites.…”

Section: Electrical Properties Of Fibresmentioning

confidence: 42%

High stiffness nano-composite fibres from polyvinylalcohol filled with graphene and boron nitride

Boland

Barwich

Khan

et al. 2016

Carbon

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Here we describe using nanosheets of both graphene and boron nitride, produced by liquid phase exfoliation, as fillers in composite fibres. The fibres were prepared by coagulation spinning using polyvinylalcohol as a matrix. We obtained good quality fibres with diameter and nanosheet volume fraction which could be controlled via the ratio of nanosheet to polymer injection rates. The mechanical stiffness (modulus, Y) and strength, σB, increased relatively slowly with volume fraction (dY/dVf 160 GPa and dσB/dVf 0.8 GPa). However, both stiffness and strength continued increasing with nanosheet content to loading levels of ~20vol%, after which the properties fell off. Such relatively high loading levels result in impressive mechanical properties with stiffness and strength of up to 30 GPa and 260 MPa observed. In addition, we found the graphene-filled fibres to be electrically conducting with conductivities of up to 3 S/m.

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Section: Electrical Properties Of Fibresmentioning

confidence: 42%

High stiffness nano-composite fibres from polyvinylalcohol filled with graphene and boron nitride

Boland

Barwich

Khan

et al. 2016

Carbon

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“…The degassed mixture was poured into preheated rectangular steel moulds with internal dimensions of 150 9 80 9 3 mm 3 and was cured at 90°C for 1 h and then post-cured at 160°C for 2 h to produce bulk nanocomposite plates. A further thermal treatment step of 200°C for 30 min was then undertaken to ensure an effective in situ thermal reduction of the GO in the crosslinked epoxy polymer nanocomposite [12,17]. The contents of rGO prepared in the epoxy polymer nanocomposites were between 0.01 and 0.06 wt%.…”

Section: Preparation Of the Epoxy Polymer Nanocomposites Containing Rgomentioning

confidence: 99%

A facile way to produce epoxy nanocomposites having excellent thermal conductivity with low contents of reduced graphene oxide

et al. 2017

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A well-dispersed phase of exfoliated graphene oxide (GO) nanosheets was initially prepared in water. This was concentrated by centrifugation and was mixed with a liquid epoxy resin. The remaining water was removed by evaporation, leaving a GO dispersion in epoxy resin. A stoichiometric amount of an anhydride curing agent was added to this epoxy-resin mixture containing the GO nanosheets, which was then cured at 90°C for 1 h followed by 160°C for 2 h. A second thermal treatment step of 200°C for 30 min was then undertaken to reduce further the GO in situ in the epoxy nanocomposite. An examination of the morphology of such nanocomposites containing reduced graphene oxide (rGO) revealed that a very good dispersion of rGO was achieved throughout the epoxy polymer. Various thermal and mechanical properties of the epoxy nanocomposites were measured, and the most noteworthy finding was a remarkable increase in the thermal conductivity when relatively very low contents of rGO were present. For example, a value of 0.25 W/mK was measured at 30°C for the nanocomposite with merely 0.06 weight percentage (wt%) of rGO present, which represents an increase of *40% compared with that of the unmodified epoxy polymer. This value represents one of the largest increases in the thermal conductivity per wt% of added rGO yet reported. These observations have been attributed to the excellent dispersion of rGO achieved in these nanocomposites made via this facile production method. The present results show that it is now possible to tune the properties of an epoxy polymer with a simple and viable method of GO addition.

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“…After annealing, even though most of AC decomposed, a polymer matrix formed during thermal process, 30,31 which benefits the contact among graphene sheets and thereby, enhances the conductivity of films. This may partly be proved by the fact that annealed films (4008C, 1h) with AC remained completeness after being immersed in solution for 24 h while graphene films without AC tended to easily break down.…”

Section: Resultsmentioning

confidence: 99%

Electrical properties of acrylic resin composite thin films with graphene/silver nanowires

Wang

Pang

et al. 2015

J of Applied Polymer Sci

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Silver nanowires and graphene were used to form networks within acrylic resin to improve its toughness and conductivity through silane coupling agent. Meanwhile, acrylic resin was favorable to the adhesion of graphene to glass substrates and the connection among graphene sheets to form films. Experimental results indicate that after annealing at 4008C, sheet resistances of graphenesilver nanowire films were lower than those graphene films without silver nanowires. The findings in this study provide helpful information on the fabrication of graphene-based electronic devices.

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Electrical conductivity of thermally reduced graphene oxide/polymer composites with a segregated structure

Cited by 99 publications

References 8 publications

High stiffness nano-composite fibres from polyvinylalcohol filled with graphene and boron nitride

High stiffness nano-composite fibres from polyvinylalcohol filled with graphene and boron nitride

A facile way to produce epoxy nanocomposites having excellent thermal conductivity with low contents of reduced graphene oxide

Electrical properties of acrylic resin composite thin films with graphene/silver nanowires

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