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Comparative Mechanical and Thermal Properties of Epoxy Matrix Composite Reinforced with Coco Peat and Coconut Shell Charcoal Fillers for Automotive Brake Friction Applications

Automotive Experiences · Vol. 8 No. 3 (2025) · hlm. 563–572

DOI
10.31603/ae.14131
ISSN
2615-6636, 2615-6202
Terbit
2025-12-14
Penerbit
Universitas Muhammadiyah Magelang
Bahasa
en

Abstrak

Developing epoxy-based composites reinforced with natural materials has become a significant concern in supporting friction materials and sustainable automotive industries. Coco peat and coco shell charcoal are coconut wastes that have the potential as natural fillers to support the mechanical properties of friction material composites while supporting the reduction of biomass waste. This study aims to evaluate the effect of weight fraction variation of coco peat and coco shell charcoal on composite mechanical and thermal properties. Specimens were prepared using the hand lay-up method with 5%, 10%, and 15% filler weight fractions. Mechanical tests were conducted, including tensile test, bending test, Rockwell hardness, and Charpy impact. Results show that the addition of 5% coco peat increased the tensile strength to 28.36 MPa and impact strength to 123.33 J/m², while coco shell charcoal at 10% recorded the highest flexural strength of 36.10 MPa and hardness of 93.66 HRB. However, increasing the filler concentration caused a decrease in tensile and impact strength due to the formation of voids, agglomeration, and micro-cracks. These findings confirm that coco peat is effective for tensile and impact strengthening at low fractions. In contrast, coco shell charcoal improves flexural strength and produces higher hardness values than the commercial brake pad product (59.59-66.90 HRB). Furthermore, the composite with 5% coco shell charcoal showed good thermal stability with a final residue value of 3.83%. Further studies can focus on surface modification of fillers, hybrid composites, and evaluation of tribological properties and the environment to promote applications in the automotive industry sector.

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Sumber metadata: OAI-PMH (metadata jurnal) http://journal.unimma.ac.id/index.php/AutomotiveExperiences/oai, pertama di-harvest 8 Nov 2026, terakhir terlihat 8 Nov 2026.
Metadata asli (oai_dc) 
<oai_dc:dc xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/  http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
	<dc:title xml:lang="en">Comparative Mechanical and Thermal Properties of Epoxy Matrix Composite Reinforced with Coco Peat and Coconut Shell Charcoal Fillers for Automotive Brake Friction Applications</dc:title>
	<dc:creator xml:lang="en">Imran, Al Ichlas</dc:creator>
	<dc:creator xml:lang="en">Endriatno, Nanang</dc:creator>
	<dc:creator xml:lang="en">Siregar, Januar Parlaungan</dc:creator>
	<dc:creator xml:lang="en">Rejab, Mohd Ruzaimi Mat</dc:creator>
	<dc:creator xml:lang="en">Wibowo, Sambodo Arif</dc:creator>
	<dc:creator xml:lang="en">Cionita, Tezara</dc:creator>
	<dc:creator xml:lang="en">Fitriyana, Deni Fajar</dc:creator>
	<dc:subject xml:lang="en">Friction material composite</dc:subject>
	<dc:subject xml:lang="en">Natural filler</dc:subject>
	<dc:subject xml:lang="en">Coco peat</dc:subject>
	<dc:subject xml:lang="en">Coco shell charcoal</dc:subject>
	<dc:subject xml:lang="en">Mechanical properties</dc:subject>
	<dc:subject xml:lang="en">Thermal properties</dc:subject>
	<dc:description xml:lang="en">Developing epoxy-based composites reinforced with natural materials has become a significant concern in supporting friction materials and sustainable automotive industries. Coco peat and coco shell charcoal are coconut wastes that have the potential as natural fillers to support the mechanical properties of friction material composites while supporting the reduction of biomass waste. This study aims to evaluate the effect of weight fraction variation of coco peat and coco shell charcoal on composite mechanical and thermal properties. Specimens were prepared using the hand lay-up method with 5%, 10%, and 15% filler weight fractions. Mechanical tests were conducted, including tensile test, bending test, Rockwell hardness, and Charpy impact. Results show that the addition of 5% coco peat increased the tensile strength to 28.36 MPa and impact strength to 123.33 J/m², while coco shell charcoal at 10% recorded the highest flexural strength of 36.10 MPa and hardness of 93.66 HRB. However, increasing the filler concentration caused a decrease in tensile and impact strength due to the formation of voids, agglomeration, and micro-cracks. These findings confirm that coco peat is effective for tensile and impact strengthening at low fractions. In contrast, coco shell charcoal improves flexural strength and produces higher hardness values than the commercial brake pad product (59.59-66.90 HRB). Furthermore, the composite with 5% coco shell charcoal showed good thermal stability with a final residue value of 3.83%. Further studies can focus on surface modification of fillers, hybrid composites, and evaluation of tribological properties and the environment to promote applications in the automotive industry sector.
&amp;nbsp;</dc:description>
	<dc:publisher xml:lang="en">Universitas Muhammadiyah Magelang</dc:publisher>
	<dc:date>2025-12-14</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://journal.unimma.ac.id/AutomotiveExperiences/article/view/14131</dc:identifier>
	<dc:identifier>10.31603/ae.14131</dc:identifier>
	<dc:source xml:lang="en">Automotive Experiences; Vol. 8 No. 3 (2025); 563-572</dc:source>
	<dc:source>2615-6636</dc:source>
	<dc:source>2615-6202</dc:source>
	<dc:language>en</dc:language>
	<dc:relation>https://journal.unimma.ac.id/AutomotiveExperiences/article/view/14131/6404</dc:relation>
	<dc:rights xml:lang="en">Copyright (c) 2025 Al Ichlas Imran, Nanang Endriatno, Januar Parlaungan Siregar, Mohd Ruzaimi Mat Rejab, Sambodo Arif Wibowo, Tezara Cionita, Deni Fajar Fitriyana</dc:rights>
</oai_dc:dc>