Role of sonication time on mechanical properties of graphene oxide/epoxy nanocomposites under quasi-static loading conditions

Nejad, S. Amini; Majzoobi, G.H.; Sabet, S. A. R.

doi:10.1007/s13726-019-00752-0

Cited by 9 publications

(2 citation statements)

References 28 publications

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“…The fracture surface of neat epoxy, illustrated in Figures 12(a) and (b), shows a cleavage failure associated with signs of stretching, which is a typical feature of the epoxy matrix. 53 River-like patterns indicate the occurrence of increased plastic deformation, and exhibited more ductile fracture, as compared to that of GNP additions. For flax/epoxy composite, Figures 12(c) and (d), epoxy matrix exhibited stretching signs during the tension process, which indicate fibre breakage and/or fibre debonding.…”

Section: Resultsmentioning

confidence: 98%

Tribological and mechanical performances of newly developed eco-epoxy composites incorporating flax fibres and graphene nanoplatelets

Awwad

Yousif

Mostafa

et al. 2022

Journal of Reinforced Plastics and Composites

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The inclusion of both fibre and solid lubricants into polymers may provide a potential solution to maximise their tribological and mechanical performances. This study investigates the effect of incorporating flax fibres and graphene nanoplatelets (GNPs) reinformcements in epoxy matrix composites on their tensile, microhardness and adhesive wear behaviour. Dry adhesive wear experiments were conducted using a block-on-ring (BOR) test rig against a stainless steel ring. Adhesive wear performance was evaluated considering the effect of the volume fraction ( V f) of flax fibre (0, 15, 20 and 25 V f .%) and different weight fractions of GNPs (1.5 and 3 wt.%). Different applied loads in the 15–60 N range, covering the mild and severe wear regions, were used. The worn surfaces were examined using a scanning electron microscope (SEM). The results revealed that flax fibre potently improved the stiffness and tensile strength of epoxy. Increase in V f of flax fibre showed a positive tendency to improve the wear resistance of epoxy; however, with an insignificant change in the coefficient of friction (COF). More interestingly, heat distortion temperature (HDT) was found to be the main key parameter controlling the wear behaviours of the composites. SEM observations indicated that severe wear signs – including detachment, fragmentation and fibre debonding – were noted when the interface temperature reached the heat distortion temperature of the epoxy. On the other hand, the inclusion of GNPs reduced the interface temperature during sliding as well as the COF of the flax/epoxy composite. Ultimately, incorporation of flax fibres and GNPs enhanced both mechanical and tribological performances of the eco-composites.

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Section: Resultsmentioning

confidence: 98%

Tribological and mechanical performances of newly developed eco-epoxy composites incorporating flax fibres and graphene nanoplatelets

Awwad

Yousif

Mostafa

et al. 2022

Journal of Reinforced Plastics and Composites

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show abstract

“…[46][47][48] In order to overcome these challenges, various mixing methods, such as high speed mechanical stirring, magnetic stirring, shear mixing, and ultrasonic horn mixing (ultrasonication), are employed and these methods proved to be effective in obtaining homogenous dispersion. 49,50 Although epoxy-based nanocomposites are widely studied systems, the studies on biobased epoxy nanocomposites with sustainable natural fillers are relatively underexplored. Biobased epoxy polymers are as good as other traditional epoxy polymers.…”

Section: Introductionmentioning

confidence: 99%

Effect of bone ash fillers on mechanical and thermal properties of biobased epoxy nanocomposites

Uddin

Kodali

Rangari

2020

J of Applied Polymer Sci

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In this study, the fabrication and characterization of bone ash filled biobased epoxy resin (Super SAP 100/1000, contains 37% biobased carbon content) nanocomposites are presented. Biosource bone ash was modified by size reduction and surface modification processes using a combination of ball milling and sonochemical techniques and characterized using X‐ray diffraction, scanning electron microscopy, and transmission electron microscopy. The modified bone ash particles were incorporated into biobased epoxy with noncontact mixing process. The as‐fabricated nanocomposites were characterized using various thermal and mechanical analyses. The nanocomposites showed significant improvement in flexural strength (41.25%) and modulus (34.56%) for 2 wt% filler loading. Dynamic mechanical analysis (DMA) results showed improvement in both storage modulus and loss modulus. Additionally, DMA results showed a slight reduction in glass transition temperature which also complies with differential scanning calorimetry results. Thermomechanical analysis results showed a reduction in the coefficient of thermal expansion. Thermogravimetric analysis results showed improved thermal stability at both onset of degradation and the major degradation. These enhanced thermal and mechanical performances of the epoxy nanocomposites allows them to be suitable for lightweight aerospace, automotive, and biomedical applications.

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Optimization on Tensile Properties of Kenaf/Multi-walled CNT Hybrid Composites with Box-Behnken Design

et al. 2021

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Role of sonication time on mechanical properties of graphene oxide/epoxy nanocomposites under quasi-static loading conditions

Cited by 9 publications

References 28 publications

Tribological and mechanical performances of newly developed eco-epoxy composites incorporating flax fibres and graphene nanoplatelets

Tribological and mechanical performances of newly developed eco-epoxy composites incorporating flax fibres and graphene nanoplatelets

Effect of bone ash fillers on mechanical and thermal properties of biobased epoxy nanocomposites

Optimization on Tensile Properties of Kenaf/Multi-walled CNT Hybrid Composites with Box-Behnken Design

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