Bimodal fiber diameter distributed graphene oxide/nylon-6 composite nanofibrous mats via electrospinning

Pant, Hem Raj; Park, Chan Hee; Tijing, Leonard D.; Amarjargal, Altangerel; Lee, Do-Hee; Kim, Cheol Sang

doi:10.1016/j.colsurfa.2012.05.018

Cited by 93 publications

(62 citation statements)

References 26 publications

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“…One aspect which we consider important to note, is that in this experiment we did not observe any type of carbonaceous spider wave-like structure similar to the one reported by Pant et al [38] These authors explain that the formation of this spider wave-like material was caused by the addition of graphene oxide into the polymer solution, and by further degradation of the Nylon-6 nanofiber due to the use of formic acid as the electrospinning solvent. Furthermore, it was also suggested that two effects caused reinforcement in the nanofiber, the hydrogen bonding interaction between the fiber, and the graphene oxide sheets that promoted the interaction of the polymer fibers with the spider wave like structure.…”

Section: Resultssupporting

confidence: 85%

EELS analysis of Nylon 6 nanofibers reinforced with nitroxide-functionalized graphene oxide

Leyva‐Porras¹,

Ornelas²,

Miki‐Yoshida³

et al. 2014

Carbon

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A detailed analysis by transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS) of nitroxide-functionalized graphene oxide layers (GOFT) dispersed in Nylon 6 nanofibers is reported herein. The functionalization and exfoliation process of graphite oxide to GOFT was confirmed by TEM using electron diffraction patterns (EDP), wherein 1 to 4 graphene layers of GOFT were observed. The distribution and alignment of GOFT layers within a sample of Nylon 6 nanofiber reveals that GOFT platelets are mainly within the fiber, but some were partially protruding from it. Furthermore, Nylon 6 nanofibers exhibit an average diameter of 225 nm with several microns in length. GOFT platelets embedded into the fiber, the pristine fiber, and amorphous carbon were analyzed by EELS where each spectra [corresponding to the carbon edge (C-K)] exhibited changes in the fine structure, allowing a clear distinction between: i) GOFT single-layers, ii) Nylon-6 nanofibers, and iii) the carbon substrate. EELS analysis is presented here for the first time as a powerful tool to identify functionalized graphene single-layers (< 4 layers of GOFT) into a Nylon 6 nanofiber composite.

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Section: Resultssupporting

confidence: 85%

EELS analysis of Nylon 6 nanofibers reinforced with nitroxide-functionalized graphene oxide

Leyva‐Porras¹,

Ornelas²,

Miki‐Yoshida³

et al. 2014

Carbon

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“…The decrease in T max in the GA 20000 nanocomposites can be due to the proper interaction between GP 20000 and PA 6 at the molecular level when the chain lengths of NH 2 -PEG-NH 2 reached a certain length. The proper interaction may be the hydrogen bond, since nylon-6 and GO sheets have different functionalities, they can easily interact with each other through intermolecular hydrogen bonding[59]. The O-H of GP can interact with N-H or C=O of nylon-6 molecular to form strong intermolecular hydrogen bond between them.…”

mentioning

confidence: 98%

Effect of polymer modifier chain length on thermal conductive property of polyamide 6/graphene nanocomposites

Song

Yang

Ding

et al. 2015

Composites Part A: Applied Science and Manufacturing

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“…The first attempt to produce polymeric electrospun nanofibres filled with GO dates back to 2010 [28]. Very recently polymers with polar groups, thus capable of interacting with oxygen-containing hydrophilic groups located at the surface of GO -such as poly(vinyl alcohol) [29], poly(acrylonitrile) [30][31][32] and poly(amides) [33] -have been electrospun with GO obtaining mats with remarkably improved mechanical properties. No attempt to prepare electrospun gelatin nanofibers enriched with GO has been reported up to now.…”

Section: Introductionmentioning

confidence: 99%

Structural reinforcement and failure analysis in composite nanofibers of graphene oxide and gelatin

Panzavolta

Bracci

Gualandi

et al. 2014

Carbon

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In this work we study the mechanical properties and failure mechanism of nanocomposites made of graphene oxide sheets embedded in polymeric systems, namely films and electro-spun nanofibers. In this last system, contrary to conventional bulk composites, the size of the nano-reinforcement (GO sheets) is comparable to the size of the nanofibers to be reinforced (≈ 200 nm). As an ideal polymeric matrix we use gelatin.We demonstrate that the high chemical affinity of the two materials hinders the renaturation of gelatin into collagen and causes a nearly ideal mixing in the GO-gelatin composite. Adding just 1% of GO we obtain an increase of Young's modulus >50% and an increase of fracture stress >60%. We use numerical simulations to study the failure mechanism of the fibers. Calculations agree very well with experimental data and show that, even if cracks start at GO sheet edges due to stress concentrations, crack propagation is hindered by the nonlinear behaviour of the matrix. As an additional advantage, the presence of the GO sheets in continuous gelatin films improves the material stability to phosphate buffer solutions from 2 days to 2 weeks, making it a better material than gelatin for applications in biological environments.4

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Bimodal fiber diameter distributed graphene oxide/nylon-6 composite nanofibrous mats via electrospinning

Cited by 93 publications

References 26 publications

EELS analysis of Nylon 6 nanofibers reinforced with nitroxide-functionalized graphene oxide

EELS analysis of Nylon 6 nanofibers reinforced with nitroxide-functionalized graphene oxide

Effect of polymer modifier chain length on thermal conductive property of polyamide 6/graphene nanocomposites

Structural reinforcement and failure analysis in composite nanofibers of graphene oxide and gelatin

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