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Effects of sulphuric acid concentrations during solvolysis process of carbon fiber reinforced epoxy composite

Developing a cost-effective technique of reclaiming carbon fibers without significantly deteriorating their quality has gained much importance. This paper reports on reclaiming carbon fibers from the carbon fiber reinforced polymer (CFRP) by solvolysis technique using sulphuric acid. The main obje...

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Main Authors: Muhammad Falaq Muhammad Faisal,, Azman Hassan,, Khong, Wui Gan, Mohd Nazrul Roslan,, Azrin Hani Abdul Rashid,
Format: Article
Language:English
Published: Penerbit Universiti Kebangsaan Malaysia 2020
Online Access:http://journalarticle.ukm.my/15903/1/5.pdf
http://journalarticle.ukm.my/15903/
http://www.ukm.my/jsm/malay_journals/jilid49bil9_2020/KandunganJilid49Bil9_2020.html
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spelling my-ukm.journal.159032020-12-06T09:06:34Z http://journalarticle.ukm.my/15903/ Effects of sulphuric acid concentrations during solvolysis process of carbon fiber reinforced epoxy composite Muhammad Falaq Muhammad Faisal, Azman Hassan, Khong, Wui Gan Mohd Nazrul Roslan, Azrin Hani Abdul Rashid, Developing a cost-effective technique of reclaiming carbon fibers without significantly deteriorating their quality has gained much importance. This paper reports on reclaiming carbon fibers from the carbon fiber reinforced polymer (CFRP) by solvolysis technique using sulphuric acid. The main objective of this work was to determine the lowest sulphuric acid concentration which can remove the epoxy resin from the composites, at room temperature and atmospheric pressure. The sulphuric acid concentrations used ranged from 11 to 18 mol L-1 with 30 min reaction time and 50 mL volume. Thermogravimetric analysis (TGA) showed that the fiber content of the composites is 68% by weight. From the solvolysis process, mass of decomposed epoxy resin decreased with decreasing acid concentrations. SEM images show that the residual epoxy adhering to the fibers after solvolysis increased with decreasing molarity. Acid concentrations lower than 15 M were found to be not effective in removing the epoxy resin from the carbon fibers. The tensile strength and Young’s modulus of all the reclaimed fibers is marginally lower than the untreated carbon fibers. The tensile strength was found to increase as the acid concentration decreases with fibers in 15 M acid showed the highest tensile strength of 3.43 GPa (99.1% strength retention). Similar trend was also observed for Young’s modulus. The study shows the potential of sulphuric acid to reclaim carbon fiber from the CFRP with 15 M giving the optimum properties in terms of tensile properties retention and epoxy resin decomposition. Penerbit Universiti Kebangsaan Malaysia 2020-09 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/15903/1/5.pdf Muhammad Falaq Muhammad Faisal, and Azman Hassan, and Khong, Wui Gan and Mohd Nazrul Roslan, and Azrin Hani Abdul Rashid, (2020) Effects of sulphuric acid concentrations during solvolysis process of carbon fiber reinforced epoxy composite. Sains Malaysiana, 49 (9). pp. 2073-2081. ISSN 0126-6039 http://www.ukm.my/jsm/malay_journals/jilid49bil9_2020/KandunganJilid49Bil9_2020.html
institution Universiti Kebangsaan Malaysia
building Tun Sri Lanang Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Kebangsaan Malaysia
content_source UKM Journal Article Repository
url_provider http://journalarticle.ukm.my/
language English
description Developing a cost-effective technique of reclaiming carbon fibers without significantly deteriorating their quality has gained much importance. This paper reports on reclaiming carbon fibers from the carbon fiber reinforced polymer (CFRP) by solvolysis technique using sulphuric acid. The main objective of this work was to determine the lowest sulphuric acid concentration which can remove the epoxy resin from the composites, at room temperature and atmospheric pressure. The sulphuric acid concentrations used ranged from 11 to 18 mol L-1 with 30 min reaction time and 50 mL volume. Thermogravimetric analysis (TGA) showed that the fiber content of the composites is 68% by weight. From the solvolysis process, mass of decomposed epoxy resin decreased with decreasing acid concentrations. SEM images show that the residual epoxy adhering to the fibers after solvolysis increased with decreasing molarity. Acid concentrations lower than 15 M were found to be not effective in removing the epoxy resin from the carbon fibers. The tensile strength and Young’s modulus of all the reclaimed fibers is marginally lower than the untreated carbon fibers. The tensile strength was found to increase as the acid concentration decreases with fibers in 15 M acid showed the highest tensile strength of 3.43 GPa (99.1% strength retention). Similar trend was also observed for Young’s modulus. The study shows the potential of sulphuric acid to reclaim carbon fiber from the CFRP with 15 M giving the optimum properties in terms of tensile properties retention and epoxy resin decomposition.
format Article
author Muhammad Falaq Muhammad Faisal,
Azman Hassan,
Khong, Wui Gan
Mohd Nazrul Roslan,
Azrin Hani Abdul Rashid,
spellingShingle Muhammad Falaq Muhammad Faisal,
Azman Hassan,
Khong, Wui Gan
Mohd Nazrul Roslan,
Azrin Hani Abdul Rashid,
Effects of sulphuric acid concentrations during solvolysis process of carbon fiber reinforced epoxy composite
author_facet Muhammad Falaq Muhammad Faisal,
Azman Hassan,
Khong, Wui Gan
Mohd Nazrul Roslan,
Azrin Hani Abdul Rashid,
author_sort Muhammad Falaq Muhammad Faisal,
title Effects of sulphuric acid concentrations during solvolysis process of carbon fiber reinforced epoxy composite
title_short Effects of sulphuric acid concentrations during solvolysis process of carbon fiber reinforced epoxy composite
title_full Effects of sulphuric acid concentrations during solvolysis process of carbon fiber reinforced epoxy composite
title_fullStr Effects of sulphuric acid concentrations during solvolysis process of carbon fiber reinforced epoxy composite
title_full_unstemmed Effects of sulphuric acid concentrations during solvolysis process of carbon fiber reinforced epoxy composite
title_sort effects of sulphuric acid concentrations during solvolysis process of carbon fiber reinforced epoxy composite
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2020
url http://journalarticle.ukm.my/15903/1/5.pdf
http://journalarticle.ukm.my/15903/
http://www.ukm.my/jsm/malay_journals/jilid49bil9_2020/KandunganJilid49Bil9_2020.html
_version_ 1685579813139513344
score 13.211869

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