In situ thermal reduction of graphene oxide for high electrical conductivity and low percolation threshold in polyamide 6 nanocomposites

Zheng, Dan; Tang, Guangshi; Zhang, Haobin; Yu, Zhong‐Zhen; Yavari, Fazel; Koratkar, Nikhil; Lim, Sangyeob; Lee, Mun‐Wai

doi:10.1016/j.compscitech.2011.11.014

Cited by 132 publications

(68 citation statements)

References 46 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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“…However, this method can maintain the good dispersion of rGO sheets and get rid of introducing the surfactant agents into polymer matrix [14,15], meanwhile avoids using reducing agents, especially hazardous ones. In this work, we use poly(vinyl alcohol) (PVA) as polymer matrix, and disperse the GO sheets in PVA matrix homogeneously through the interaction between the hydroxyl groups on the PVA chains and oxygen-functional groups located on the surface of GO sheets, and then to reduce the GO sheets through the in-situ thermal reduction at a special temperature which depends on the decomposition temperature of PVA [12,13,16]. In our method, there are two purposesintended, 1) usage of the LGO sheets to construct a continuous filler network, and 2) avoiding the introduction of reducing and surfactant agents during the reduction processing.…”

Section: T N Zhou X D Qi Q Fumentioning

confidence: 99%

The preparation of the poly(vinyl alcohol)/graphene nanocomposites with low percolation threshold and high electrical conductivity by using the large-area reduced graphene oxide sheets

Zhou¹,

Qi²,

Fu³

2013

Express Polym. Lett.

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Abstract. We report a method to prepare the poly(vinyl alcohol)/reduced graphene oxide (PVA/rGO) nanocomposites with low percolation threshold and high electrical conductivity by using the large-area reduced graphene oxide (LrGO) sheets. The large-area graphene oxide (LGO) sheets are expected to overlap better with each other and form the continuous GO network in PVA matrix than small-area graphene oxide (SGO). During the thermal reduction process, the LGO sheets are easily restored and improve the electrical conductivity of nanocomposites due to their low damage level of conjugate-structure. As a result, the percolation threshold of PVA/LrGO nanocomposites is ~0.189 wt% lower than present reports (0.5~0.7 wt%). At the LrGO content of 0.7 wt%, the electrical conductivity of PVA/LrGO nanocomposites reaches 6.3·10 -3 S/m. Besides that, this method only takes 15~30 min to reduce the PVA/GO nanocomposites effectively.

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“…Graphene, as layered 2D nanofiller material, has great potential for improving mechanical [12,13], thermal [14][15][16] and electrical [17] properties of polymers. Graphene oxide (GO), as nano-fillers, has also been proved to significantly improve the mechanical properties (elastic modulus, tensile strength) and thermal stability of polymer composites [18].…”

Section: Introductionmentioning

confidence: 99%

Dielectric and mechanical properties and thermal stability of polyimide–graphene oxide composite films

et al. 2015

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In situ thermal reduction of graphene oxide for high electrical conductivity and low percolation threshold in polyamide 6 nanocomposites

Cited by 132 publications

References 46 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

The preparation of the poly(vinyl alcohol)/graphene nanocomposites with low percolation threshold and high electrical conductivity by using the large-area reduced graphene oxide sheets

Dielectric and mechanical properties and thermal stability of polyimide–graphene oxide composite films

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