Fabrication of two-dimensional hybrid sheets by decorating insulating PANI on reduced graphene oxide for polymer nanocomposites with low dielectric loss and high dielectric constant

Li, Mi; Huang, Xingyi; Wu, Chao; Xu, Haiping; Jiang, Pingkai; Tanaka, Toshikatsu

doi:10.1039/c2jm34683d

Cited by 186 publications

(82 citation statements)

References 55 publications

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“…The peaks at 3412, 1732, 1567 , 1038, 1213, 2800, and 700/cm are attributed to the stretching vibrations of hydroxyl group (O-H), carboxylic acid group (C=O), aromatic carbon double bond (C=C), alkoxy (C-O), C-OH stretching vibration, -CH 2 -stretching vibration, and aromatic (C-H) peaks in graphene oxide, respectively. 26,27 Figure 1b shows the FT-IR spectrum of F-GO. The carboxylic acid group (C=O) of GO at 1732/cm disappeared and the intensity of the peaks appeared at 3420 and 1020/cm increased due to the stretching vibrations of amine (NH 2 ) and silica (-O-Si-), when compared to GO.…”

Section: Ft-ir Spectroscopymentioning

confidence: 99%

Enhancement in Mechanical, Thermal, and Dielectric Properties of Functionalized Graphene Oxide Reinforced Epoxy Composites

Kumar

Subramanian

2016

Adv Polym Technol

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ABSTRACT:The present work has the objective of fabricating graphene oxide (GO) and amine-functionalized graphene oxide (F-GO) reinforced epoxy composites using the casting method. Epoxy resin was dispersed separately with GO (0.5 wt%) and F-GO (0.5 and 1 wt%), and then the epoxy resin mixture cured with triethylenetetraamine at room temperature. The synthesized GO and F-GO were characterized by FT-IR and Raman spectroscopy. The interfacial interaction of Si in the composite was studied by XPS. The formation of GO and F-GO was confirmed by XRD. The tensile and flexural strength composites were measured using the UTM. The thermal behavior and dynamic mechanical behavior were examined by TGA and DMA. The surface morphology and dielectrical properties were analyzed by SEM, TEM, and impedance analyses. The results obtained from epoxy/F-GO (0.5 wt%) composite revealed higher mechanical and thermal properties than neat epoxy and epoxy/GO composites.

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Section: Ft-ir Spectroscopymentioning

confidence: 99%

Enhancement in Mechanical, Thermal, and Dielectric Properties of Functionalized Graphene Oxide Reinforced Epoxy Composites

Kumar

Subramanian

2016

Adv Polym Technol

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“…Some polymers with a large number of benzene ring structure such as hyperbranched aromatic polyamide (HBP) [21], polyhedral oligosilsesquioxane (POSS) [1], and reduced polyaniline (rPANI) [22] have been used to enhance thermal conductivity, as the benzene ring structure is advantageous for the phonon transmission. Besides, the coating polymers with some functional groups can increase the nanoparticle dispersion and enhance the interfacial interaction between inorganic fillers and polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Sandwiched epoxy–alumina composites with synergistically enhanced thermal conductivity and breakdown strength

Wang

Yang

et al. 2017

J Mater Sci

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Development of polymer-based composites with simultaneously high thermal conductivity and breakdown strength has attracted considerable attentions owing to their important applications in both electronic and electric industries. In this study, we successfully design novel epoxy-based composites with nanoAl 2 O 3 /epoxy composite layer sandwiched between micro-Al 2 O 3 /epoxy composite layers, which show synergistically and significantly enhanced thermal conductivity and breakdown strength. Compared with the traditional composites, the bottleneck that both thermal conductivity and breakdown strength cannot be simultaneously enhanced can be overcome successfully. An optimized sandwiched alumina-epoxy composite with 70 wt% micro-Al 2 O 3 fillers in the outer layers and 3 wt% nano-Al 2 O 3 in the middle layer simultaneously displays a high thermal conductivity of 0.447 W m -1 K -1 (2.4 times of that of epoxy) and a high breakdown strength of 68.50 kV mm -1 , which is 6.3 % higher than that of neat epoxy (64.45 kV mm -1 ). The experimental results on the thermal conductivity of multi-layered alumina-epoxy composites were in well accordance with the theoretical values predicted from the series conduction model. This novel technique simultaneously improves thermal conductivity and breakdown strength, which is of critical importance for design of perspective composites for electronic and electric equipments.

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“…[9][10][11][12]. This two-dimensional carbon-based material has rapidly emerged as a rising star in various application fields such as sensors [13], hydrogen storage [14], batteries [15] and super capacitors [16].…”

Section: Introductionmentioning

confidence: 99%

Decoration of reduced graphene oxide with dandelion-like TiO2 and their dielectric properties in poly(arylene ether nitriles) composites

Tong

Wang

et al. 2014

J Mater Sci: Mater Electron

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Novel dandelion-like titanium oxide (TiO 2 ) decorated reduced graphene oxide (rGO@TiO 2 ) hybrids were obtained by a one-step solvent-thermal reduction of GO and tetrabutyl titanate simultaneously. The hybrids were used as a novel filler for high performance poly(arylene ether nitriles) (PEN) composites. The thermal stability and morphological properties of the PEN composites were, respectively, investigated by the thermo gravimetric analysis and scanning electron microscope, aiming at examining the effect of surface decoration on the dispersion of rGO@TiO 2 in PEN matrix. The results indicated that the rGO@TiO 2 present better dispersion in the PEN matrix. Meanwhile, the derived composite films exhibited high thermal stability with initial decomposition temperatures (T id ) in the range of 477-487°C. DSC curves showed that the glass transition temperatures were in the range of 219-227°C. Moreover, all of the composite films also showed excellent flexibility and mechanical properties. The tensile modulus and strength were increased about 4 and 6 % with 5 wt% rGO@TiO 2 loading, respectively. More importantly, for 30 wt% rGO@TiO 2 reinforced PEN composite film, the dielectric permittivity dramatically increased from 3.8 to 81 at 1 kHz.

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Fabrication of two-dimensional hybrid sheets by decorating insulating PANI on reduced graphene oxide for polymer nanocomposites with low dielectric loss and high dielectric constant

Cited by 186 publications

References 55 publications

Enhancement in Mechanical, Thermal, and Dielectric Properties of Functionalized Graphene Oxide Reinforced Epoxy Composites

Enhancement in Mechanical, Thermal, and Dielectric Properties of Functionalized Graphene Oxide Reinforced Epoxy Composites

Sandwiched epoxy–alumina composites with synergistically enhanced thermal conductivity and breakdown strength

Decoration of reduced graphene oxide with dandelion-like TiO2 and their dielectric properties in poly(arylene ether nitriles) composites

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