Effects of graphene on the behavior of chitosan and starch nanocomposite films

Ashori, Alireza

doi:10.1002/pen.23774

Cited by 40 publications

(24 citation statements)

References 24 publications

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“…The GO can be produced in large quantities at a relatively low cost and possesses excellent mechanical properties [7]. It has attracted a great deal of scientific interest because of its large surface area (2630 m 2 /g), high intrinsic mobility (200,000 cm 2 /Vs), high Young's modulus (~1.0 TPa), high thermal conductivity (~5000 W/mK), and high optical transmittance (~97.7%) [2,11]. The GO contains various oxygenated functional groups such as epoxide, hydroxyl and carbonyl groups.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of functionalized graphene oxide/carbon fiber/epoxy nanocomposites

2015

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a b s t r a c tGraphene oxide (GO) was functionalized using three different diamines, namely ethylenediamine (EDA), 4,4 0 -diaminodiphenyl sulfone (DDS) and p-phenylenediamine (PPD) to reinforce an epoxy adhesive, with the aim of improving the bonding strength of carbon fiber/epoxy composite. The chemical structure of the functionalized GO (FGO) nanosheets was characterized by elemental analysis, FT-IR and XRD. Hand lay-up, as a simple method, was applied for 3-ply composite fabrication. In the sample preparation, the fiber-to-resin ratio of 40:60 (w:w) and fiber orientations of 0 , 90 , and 0 were used. The GO and FGO nanoparticles were first dispersed in the epoxy resin, and then the GO and FGO reinforced epoxy (GO-or FGO-epoxy) were directly introduced into the carbon fiber layers to improve the mechanical properties. The GO and FGO contents varied in the range of 0.1e0.5 wt%. Results showed that the mechanical properties, in terms of tensile and flexural properties, were mainly dependent on the type of GO functionalization followed by the percentage of modified GO. As a result, both the tensile and flexural strengths are effectively enhanced by the FGOs addition. The tensile and flexural moduli are also increased by the FGO filling in the epoxy resin due to the excellent elastic modulus of FGO. The optimal FGO content for effectively improving the overall composite mechanical performance was found to be 0.3 wt%. Scanning electron microscopy (SEM) revealed that the failure mechanism of carbon fibers pulled out from the epoxy matrix contributed to the enhancement of the mechanical performance of the epoxy. These results show that diamine FGOs can strengthen the interfacial bonding between the carbon fibers and the epoxy adhesive.

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of functionalized graphene oxide/carbon fiber/epoxy nanocomposites

2015

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“…A single graphene sheet has a Young's modulus of 1 TPa and intrinsic strength of 130 GPa measured by nanoindentation in atomic force microscopy 17 . Utilisation of graphene for bulk nanocomposite often faces several problems such as poor dispersion 18 , weak interfaces between graphene and binder 19 and brittleness will significantly increases 20 . Recently developed bioinspired nacremimetic synthesis has successfully produced dispersed graphene nanocomposite with content of more than 70 wt% while maintaining its elasticity 21 .…”

Section: Introductionmentioning

confidence: 99%

Polymer nanocomposites having a high filler content: synthesis, structures, properties, and applications

et al. 2019

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The recent development of nanoscale fillers, such as carbon nanotube, graphene, and nanocellulose, allows the functionality of polymer nanocomposites to be controlled and enhanced. However, conventional synthesis methods of polymer nanocomposites cannot maximise the reinforcement of these nanofillers at high filler content. Approaches to the synthesis of high content filler polymer nanocomposites are suggested to facilitate future applications. The fabrication methods address design of the polymer nanocomposite architecture, which encompass one, two, and three dimensional morphology. Factors that hamper the reinforcement of nanostructures, such as alignment, dispersion of filler as well as interfacial bonding between filler and polymer are outlined. Using suitable approaches, maximum potential reinforcement of nanoscale filler can be anticipated without limitations in orientation, dispersion, and the integrity of the filler particle-matrix interface. High filler content polymer composites containing emerging materials such as 2D transition metal carbides, nitrides, and carbonitrides (MXenes) are expected in the future.Graphical abstract: Approaches to the synthesis of high filler content polymer composites

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“…To date, the solution‐based method has been the most commonly used method for the preparation of the starch‐GrO BNCs, and it has been reported to obtain an improvement in the conductive, thermal, and mechanical properties attributed to good interactions and exfoliation of GO with the starch molecules . Melt mixing is an alternative approach for BNCs preparation.…”

Section: Introductionmentioning

confidence: 99%

Starch‐graphene oxide bionanocomposites prepared through melt mixing

Ávila‐Orta

Soriano‐Corral

Fonseca‐Florido

et al. 2017

J of Applied Polymer Sci

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Bionanocomposites (BNCs) of waxy corn starch, glycerol, and graphene oxide (GO) or graphite oxide (GrO) were prepared by melt mixing. First, the GrO was pre-exfoliated in a water solution using ultrasound at 1 wt %. Small-angle X-ray scattering was used to determinate the interlaminar separation of GrO and transmission electron microscopy, Fourier infrared spectroscopy, and thermogravimetric analysis were used to characterized the GrO. Next, BNCs were characterized by X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, and mechanical property measurements. A complete exfoliation of GrO was obtained in the waxy corn matrix. Amorphous X-ray patterns of the BNCs were observed, indicating that the exfoliated GO avoid the retrogradation of starch. According to scanning electron microscopy results, the BNCs showed an irregular texture and a good dispersion of GO, while thermoplastic starch showed a smooth morphology with a fragile structure. The BNCs exhibited higher thermal stability than thermoplastic starch. The tensile strength and the Young's modulus increased by 140% and 230% at a GO loading levels of 0.5% due to good interfacial interactions of GO and the waxy corn starch matrix.

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Effects of graphene on the behavior of chitosan and starch nanocomposite films

Cited by 40 publications

References 24 publications

Preparation and characterization of functionalized graphene oxide/carbon fiber/epoxy nanocomposites

Preparation and characterization of functionalized graphene oxide/carbon fiber/epoxy nanocomposites

Polymer nanocomposites having a high filler content: synthesis, structures, properties, and applications

Starch‐graphene oxide bionanocomposites prepared through melt mixing

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