Graphite oxide as a carbocatalyst for the preparation of fullerene-reinforced polyester and polyamide nanocomposites

Dreyer, Daniel R.; Jarvis, Karalee; Ferreira, Paulo J.; Bielawski, Christopher W.

doi:10.1039/c2py00545j

Cited by 101 publications

(61 citation statements)

References 73 publications

(82 reference statements)

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“…There are a number of reasons for producing graphene-based polymer nanocomposites. The addition of a filler with such impressive mechanical properties is expected to lead to a significant improvement in the mechanical properties of the host polymer matrix [3,4].…”

Section: Introductionmentioning

confidence: 99%

Effects of Graphene Nanoplatelets and Reduced Graphene Oxide on Poly(lactic acid) and Plasticized Poly(lactic acid): A Comparative Study

et al. 2014

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Abstract:The superlative mechanical properties of graphene-based materials make them the ideal filler materials for polymer composites reinforcement. Two types of graphene-based materials, graphene nanoplatelets (xGnP) and reduced graphene oxide (rGO), were used as nanofiller in poly(lactic acid) (PLA) polymer matrix, as well as plasticized PLA. The addition of rGO into PLA or plasticized PLA substantially enhanced the tensile strength without deteriorating elasticity, compared to xGnP nanocomposites. In addition, the investigation of the thermal properties has found that the presence of rGO in the system is very beneficial for improving thermal stability of the PLA or plasticized PLA. Scanning electron microscope (SEM) images of the rGO nanocomposites display homogenous and good uniformity morphology. Transmission electron microscopy (TEM) images revealed that the rGO remained intact as graphene sheet layers and were dispersed OPEN ACCESS Polymers 2014, 6 2233 well into the polymer matrix, and it was confirmed by X-ray diffraction (XRD) results, which shows no graphitic peak in the XRD pattern.

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Section: Introductionmentioning

confidence: 99%

Effects of Graphene Nanoplatelets and Reduced Graphene Oxide on Poly(lactic acid) and Plasticized Poly(lactic acid): A Comparative Study

et al. 2014

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“…28,29 GO is an ideal candidate for use in solid acid catalysis due to its relatively low cost, heterogenous state, and ease of preparation. 30 The material is typically synthesized in one step by treating natural flake graphite with KMnO 4 in H 2 SO 4 at room temperature followed by filtration.…”

Section: Introductionmentioning

confidence: 99%

Graphite oxide activated zeolite NaY: applications in alcohol dehydration

Todd

Bielawski

2013

Catal. Sci. Technol.

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A mixture of graphite oxide (GO) and the zeolite NaY (Si/Al = 5.1) was used to dehydrate various alcohols to their respective olefinic products. Using conditions optimized for 4-heptanol (15 wt% GO-NaY (1 : 1 wt/wt), 150 1C, 30 min), a series of secondary and tertiary aliphatic alcohols were cleanly dehydrated in moderate to excellent conversions (27.5-97.2%). Several primary alcohols were also dehydrated, although higher catalyst loadings (200 wt% GO-NaY (1 : 1) and longer reaction times (3 h) were required. The enhanced dehydration activity was attributed to the ability of GO to convert NaY to an acidic form and without the need for ammonium cation exchange and/or high temperature calcination.

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“…First, the presence of oxygencontaining functional groups allows GO to function as an oxidant for the oxidation of sulphides, 16 olefins and various hydrocarbons 17 . In addition, the acidic nature of GO allows GO to act as a solid acid for hydration, 18 Friedel-Crafts reaction, 19 Aza-Michael additions, 20 condensation 21 and ringopening polymerization 22 . Therefore, it is attractive to develop GO-based carbocatalysts as an alternative to dwindling precious metal resources 6,23 .…”

mentioning

confidence: 99%

Probing the catalytic activity of porous graphene oxide and the origin of this behaviour

et al. 2012

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Graphene oxide, a two-dimensional aromatic scaffold decorated by oxygen-containing functional groups, possesses rich chemical properties and may present a green alternative to precious metal catalysts. Graphene oxide-based carbocatalysis has recently been demonstrated for aerobic oxidative reactions. However, its widespread application is hindered by the need for high catalyst loadings. Here we report a simple chemical treatment that can create and enlarge the defects in graphene oxide and impart on it enhanced catalytic activities for the oxidative coupling of amines to imines (up to 98% yield at 5 wt% catalyst loading, under solvent-free, open-air conditions). This study examines the origin of the enhanced catalytic activity, which can be linked to the synergistic effect of carboxylic acid groups and unpaired electrons at the edge defects. The discovery of a simple chemical processing step to synthesize highly active graphene oxide allows the premise of industrial-scale carbocatalysis to be explored.

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Graphite oxide as a carbocatalyst for the preparation of fullerene-reinforced polyester and polyamide nanocomposites

Cited by 101 publications

References 73 publications

Effects of Graphene Nanoplatelets and Reduced Graphene Oxide on Poly(lactic acid) and Plasticized Poly(lactic acid): A Comparative Study

Effects of Graphene Nanoplatelets and Reduced Graphene Oxide on Poly(lactic acid) and Plasticized Poly(lactic acid): A Comparative Study

Graphite oxide activated zeolite NaY: applications in alcohol dehydration

Probing the catalytic activity of porous graphene oxide and the origin of this behaviour

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