Thermo-mechanical characteristics of spent coffee grounds reinforced bio-composites

Cenk Yanen

doi:10.1515/mt-2023-0434

Article

Thermo-mechanical characteristics of spent coffee grounds reinforced bio-composites

Cenk Yanen
Cenk Yanen obtained his BSc in Mechanical Engineering from Mersin University, Turkey, in 2010. He then pursued his MSc and PhD in Mechanical Engineering from Firat University, Turkey, in 2015 and 2021, respectively. Currently, he is an Assistant Professor in the Department of Mechanical Engineering at Firat University, Turkey. His research interests include composite materials, mechanical tests, impact, solid mechanics, and failure analysis.

Published/Copyright: May 29, 2024

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From the journal Materials Testing Volume 66 Issue 8

Abstract

This research examines the incorporation of spent coffee grounds (SCGs) into composite materials utilizing a three-part system composed of modified castor oil, polyester resin, and SCGs. The objective is to assess the mechanical, microstructural, and thermal characteristics of the resultant composites. The composite specimens underwent a thorough preparation and were tested through a battery of procedures comprising tensile testing, shore D hardness testing, SEM, FT-IR, and thermal conductivity measurements. Tensile testing revealed higher mechanical resilience, reinforcing the desirable properties of SCGs. The 5 % SCG-reinforced sample exhibited the highest tensile strength value, with a 41.85 % increase observed in comparison to the pure sample. The results of shore D hardness tests demonstrated that there was no significant change in material hardness up to 3 % additive content. However, a decrease in hardness was observed at higher additive rates. At a 7 % additive rate, there was a 2.82 % decrease in material hardness. Furthermore, the application of scanning electron microscopy (SEM) analysis has revealed the microstructural features of the composite matrix, which have highlighted the distribution of SCGs within it. The successful implementation of SCGs has also been verified by means of Fourier transform infrared (FT-IR) analysis. Finally, based on thermal conductivity measurements, it has been determined that SCGs are suitable for thermal insulation purposes. This study represents a significant contribution to the field of sustainable materials science, emphasising the potential benefits of SCGs in improving the effectiveness of composite materials.

Keywords: bio-composite; castor oil; polyester resin; spent coffee ground; thermo-mechanical

Corresponding author: Cenk Yanen, Department of Mechanical Engineering, Faculty of Engineering, Firat University, Elazig 23119, Türkiye, E-mail: cyanen@firat.edu.tr

About the author

Cenk Yanen

Cenk Yanen obtained his BSc in Mechanical Engineering from Mersin University, Turkey, in 2010. He then pursued his MSc and PhD in Mechanical Engineering from Firat University, Turkey, in 2015 and 2021, respectively. Currently, he is an Assistant Professor in the Department of Mechanical Engineering at Firat University, Turkey. His research interests include composite materials, mechanical tests, impact, solid mechanics, and failure analysis.

Research ethics: Not applicable.
Author contributions: The author has accepted responsibility for the entire content of this manuscript and approved its submission.
Competing interests: The author states no conflict of interest.
Research funding: None declared.
Data availability: The raw data can be obtained on request from the corresponding author.

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Published Online: 2024-05-29

Published in Print: 2024-08-27

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Articles in the same Issue

https://doi.org/10.1515/mt-2023-0434

Keywords for this article

bio-composite; castor oil; polyester resin; spent coffee ground; thermo-mechanical