journal article·2022-01Open access

Investigation of flexural properties of epoxy composite by utilizing graphene nanofillers and natural hemp fibre reinforcement

Shankar A Hallad, Sharanabasava V Ganachari, Manzoore Elahi M Soudagar, NR Banapurmath, Anand M Hunashyal, Islam MR Fattah, Fayaz Hussain, Muhammad A Mujtaba, Asif Afzal, Mohammad S Kabir, Ashraf Elfasakhany

Abstract

This study aims to determine the optimum reinforcement required to attain the best combination of flexural strength of modified green composites (graphene oxide + hemp fibre reinforced epoxy composites) for potential use in structural applications. An attempt was also made for the combination of graphene and hemp fibres to enhance load-bearing ability. The infusion of hemp and graphene was made by the weight of the base matrix (epoxy composite). Results showed that graphene reinforcement at 0.4 wt.% of matrix showed load-sustaining capacity of 0.76 kN or 760 MPa. In the case of hemp fibre reinforcement at 0.2 wt.% of the matrix, infusion showed enhanced load-bearing ability (0.79 kN or 790 MPa). However, the combination of graphene (0.1 wt.% graphene nanofillers) and hemp (5 wt.% hemp fibre) indicated a load-sustaining ability of 0.425 kN or 425 MPa, whereas maximum deflection was observed for specimen with hemp 7.5 % + graphene 0.2 % with 1.9 mm. Graphene addition to the modified composites in combination with natural fibres showed promising results in enhancing the mechanical properties under study. Moreover, graphene-modified composites exhibited higher thermal resistance compared to natural fibre reinforced composites. However, when nanofiller reinforcement exceeded a threshold value, the composites exhibited reduced flexural strength as a result of nanofiller agglomeration.
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Research context

OpenAlex topics: Natural Fiber Reinforced Composites · Tribology and Wear Analysis · Electromagnetic wave absorption materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Material Science, KLE Technological University, Hubballi, Karnataka, India

Department of Mechanical Engineering, KLE Technological University, Hubballi, Karnataka, India

School of Advanced Sciences, KLE Technological University, Hubballi, Karnataka, India

Department of Mechanical Engineering, School of Technology, Glocal University, Delhi-Yamunotri Marg, Uttar Pradesh, India

Department of Mechanical Engineering and University Centre for Research & Development, Chandigarh University, Mohali, Punjab, India

Department of Civil Engineering, KLE Technology University, Hubballi, Karnataka, India

Centre for Green Technology, School of Civil and Environmental Engineering, Faculty of Engineering and IT, University of Technology Sydney, Ultimo, New South Wales, Australia

Modeling Evolutionary Algorithms Simulation and Artificial Intelligence, Faculty of Electrical & Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam

Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia

Department of Mechanical Engineering, P. A. College of Engineering (Affiliated to Visvesvaraya Technological University, Belgavi), Mangaluru, India

Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC, Australia

Mechanical Engineering Department, College of Engineering, Taif University, Taif, Saudi Arabia

Funding

Taif University

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