Poly(propylene)/Graphene Nanoplatelet Nanocomposites: Melt Rheological Behavior and Thermal, Electrical, and Electronic Properties

Li, Yunfeng; Zhu, Jiahua; Wei, Suying; Ryu, Jongeun; Sun, Luyi; Guo, Zhanhu

doi:10.1002/macp.201100263

Cited by 197 publications

(142 citation statements)

References 52 publications

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“…These results are in agreement with the behavior of various other polymergraphene composites reported in literature. [ 25 ] Below this threshold, the current-voltage ( I -V ) curves display highly hysteretic non-ohmic behavior (see the top right inset in Figure 2 ). It is important to note that electrical measurements reported herein are for one-sided samples (ink only sprayed on one face), however, hot pressing of both surface sprayed samples produced identical results due to excellent isotropy as a result of impregnation.…”

Section: Resultsmentioning

confidence: 98%

Foldable Conductive Cellulose Fiber Networks Modified by Graphene Nanoplatelet‐Bio‐Based Composites

Cataldi

Bayer

Bonaccorso

et al. 2015

Adv Elect Materials

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Truly foldable flexible electronic components require a foldable substrate modified with a conducting material that can retain its electrical conductivity and mechanical integrity even after hard mechanical manipulations and multiple folding events. Here, such a material exploiting the combination of all‐biodegradable components (substrate and the polymer matrix) and graphene nanoplatelets is designed and fabricated. A commercially available thermoplastic starch‐based polymer (Mater‐Bi) and graphene nanoplatelets are simultaneously dispersed in an organic solvent to formulate conductive inks. The inks are spray painted on pure cellulose sheets and hot‐pressed into their fiber network after drying. The resultant nanostructured flexible composites display excellent isotropic electrical conductivity, reaching very low sheet resistance value ≈10 Ω sq−1, depending on the relative concentration between the biopolymer and the graphene nanoplatelets. Transmission electron microscopy results indicated that during hot‐pressing, graphene nanoplatelets are physically embedded into the cellulose fibers, resulting in high electrical conductivity of the flexible composite. The paper‐like flexible conductors can withstand many severe folding events, maintaining their mechanical and electrical properties and showing only a slight decrease of their electrical conductivity with respect to the unfolded counterparts. Unlike conductive paper technologies, the proposed paper‐like flexible conductors demonstrate both sides isotropic conductivity due to pressure‐induced impregnation.

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Section: Resultsmentioning

confidence: 98%

Foldable Conductive Cellulose Fiber Networks Modified by Graphene Nanoplatelet‐Bio‐Based Composites

Cataldi

Bayer

Bonaccorso

et al. 2015

Adv Elect Materials

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“…The agglomeration and curving of the GnPs in PP matrix compromised the effect of high aspect ratio, which was discussed somewhere else. [ 27 ] Overall, it shows that the solution strategy is not as effective for the dispersion of GnPs or layer structured fi llers as for the fi brous fi llers, which is possibly owing to the nature of GnP to easily bend in polymer. Actually, via a solid-state shear pulverization method, a percolation threshold as low as 2.7 wt% was achieved in the PP/exfoliated graphite nanocomposites by Wakabayashi et al [ 25 ] In order to investigate the effects of different carbon nanofi llers on the PP PNCs, the same weight percentage (5.0 wt%) was chosen.…”

Section: Morphological Characterizationmentioning

confidence: 99%

“…[ 52 ] The XRD patterns of the PNCs are the combination of the ones from their parent matrix and the fi ller. The two peaks of GnP (26.7 and 54.8 ° ) appear in XRD patterns of the PP/GnP PNCs and their intensity was elevated as increasing the GnP content, [ 27 ] shown in Figure 6 A. We point, T max ), the end temperatures of the degradation ( T end ), and the degradation temperature ranges ( T r ) are summarized and listed in Table 2 .…”

Section: Xrdmentioning

confidence: 99%

Poly(propylene) Nanocomposites Containing Various Carbon Nanostructures

Zhu

Wei

et al. 2011

Macro Chemistry & Physics

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PP nanocomposites containing different carbon nanofi llers (CNTs, CNFs, GnPs, CB) are fabricated and further processed by hot compression molding. A high level of nanofi ller dispersion is found. The NCs exhibit improved thermal stability and higher crystallinity. Both electrical conductivity and real permittivity increase with increasing nanofi ller loading. A strongly aspect ratio dependent electrical conductivity percolation is observed at loadings of 15.0, 12.0, 5.0, and 3.0 wt% for CB, GnPs, CNFs, and CNTs, respectively. The rheological behavior of the NC melts is also investigated. A small concentration of the nanofi llers is found to affect the modulus and viscosity of the PP melts signifi cantly.

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“…Polymer composites with GO have attracted great interest due to their unique properties, which are derived from extended interactions between the GO and the matrix and their wide potential applications such as electromagnetic wave shielding and sensors [24][25][26][27][28][29][30][31][32]. For example, Cao et al [33] found that the tensile strength and young's modulus of GO composites increased by 78 and 73%, respectively, when compared with pure polystyrene.…”

Section: Introductionmentioning

confidence: 99%

Strengthened epoxy resin with hyperbranched polyamine-ester anchored graphene oxide via novel phase transfer approach

Zhang

Liang

Wang

et al. 2017

Adv Compos Hybrid Mater

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This work investigated the mechanical properties of epoxy resin composites embedded with graphene oxide (GO) using a novel two-phase extraction method. The graphene oxide from water phase was transferred into epoxy resin forming homogeneous suspension. Hyperbranched polyamine-ester (HBPE) anchored graphene oxide (GO HBPE ) was prepared by modifying GO with HBPE using a neutralization reaction. Fourier transform-infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM) showed that the HBPE was successfully grafted to the GO surface. The mechanical properties and dynamic mechanical analysis (DMA) of the composites demonstrated that GO HBPE played a critical role in mechanical reinforcement owing to the layered structure of GO, wrinkled topology, surface roughness and surface area ascending from various oxygen groups of GO itself, and the inarching of HBPE and the reaction among GO, HBPE, and epoxy resin. The transferred GO HBPE /epoxy resin composites showed 69.1% higher impact strength, 129.1% more tensile strength, 45.3% larger modulus, and 70.8% higher strain compared to that of cured neat epoxy resin. The glass transition temperature (Tg) of GO HBPE /epoxy resin composites was increased from 135 to 141°C and their damping capacity was also improved from 0.71 to 0.91. This study provides guidelines for the fabrication of strengthened polymer composites using phase transfer approach.

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Poly(propylene)/Graphene Nanoplatelet Nanocomposites: Melt Rheological Behavior and Thermal, Electrical, and Electronic Properties

Cited by 197 publications

References 52 publications

Foldable Conductive Cellulose Fiber Networks Modified by Graphene Nanoplatelet‐Bio‐Based Composites

Foldable Conductive Cellulose Fiber Networks Modified by Graphene Nanoplatelet‐Bio‐Based Composites

Poly(propylene) Nanocomposites Containing Various Carbon Nanostructures

Strengthened epoxy resin with hyperbranched polyamine-ester anchored graphene oxide via novel phase transfer approach

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