Influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber

Rubber based product has properties very different from the viscous latex of the rubber tree, Hevea brasiliensis. The properties of rubber latex are usually changed to enable it be used in production of many rubber based products such as tires, hoses, and etc. To strengthen it, the rubber undergoes...

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Main Authors:	Othman, Emeliana, Yusof, Faridah, Azmi, Azlin Suhaida
Format:	Article
Language:	English
Published:	Penerbit Akademia Baru 2017
Subjects:	T Technology (General) TP Chemical technology TP248.13 Biotechnology
Online Access:	http://irep.iium.edu.my/59632/ http://irep.iium.edu.my/59632/ http://irep.iium.edu.my/59632/1/P%2096.pdf

id	iium-59632
recordtype	eprints
spelling	iium-596322018-01-05T09:42:30Z http://irep.iium.edu.my/59632/ Influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber Othman, Emeliana Yusof, Faridah Azmi, Azlin Suhaida T Technology (General) TP Chemical technology TP248.13 Biotechnology Rubber based product has properties very different from the viscous latex of the rubber tree, Hevea brasiliensis. The properties of rubber latex are usually changed to enable it be used in production of many rubber based products such as tires, hoses, and etc. To strengthen it, the rubber undergoes vulcanization process where the addition of sulfur and heating the mixture under pressure is done which results in the formation of sulfur-bridges between the hydrocarbon chains. It makes an economic sense to recycle spent rubber products. Prior to recycling, surface devulcanization of rubber is vital to produce the acceptable reprocessed product. Devulcanization is basically a process that cleaved the monosulfidic, disulfidic or polysulfidic of vulcanized rubber. The tensile strength of the new material is of paramount important. In this study, enzymatic devulcanization of rubber was performed. Design of Experiment and analysis was conducted using Design Expert® (Version 6.0.8) software, with a tensile strengths as the responses. Results showed that both factors tested, time of incubation and rubber concentration contributed significantly towards the strength of rubber products. Data shows that setting the incubation time for 4 hours with 4% w/v rubber in the incubation media results in the highest tensile strength of 10.7 MPa, an increase of 67% from the untreated control. In conclusion, the process conditions of the enzymatic devulcanization of used rubber product have been successfully optimized using tetrathionate hydrolase rich media, produced by Thiobacillus ferrooxidans. This information is important to improve enzymatic devulcanization method and finally to increase the percentage of rubber recycling. Penerbit Akademia Baru 2017 Article PeerReviewed application/pdf en http://irep.iium.edu.my/59632/1/P%2096.pdf Othman, Emeliana and Yusof, Faridah and Azmi, Azlin Suhaida (2017) Influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber. Journal of Advanced Research in Materials Science, 38 (1). pp. 15-20. ISSN 2289-7992 http://www.akademiabaru.com/doc/ARMSV38_N1_P15_20.pdf
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	T Technology (General) TP Chemical technology TP248.13 Biotechnology
spellingShingle	T Technology (General) TP Chemical technology TP248.13 Biotechnology Othman, Emeliana Yusof, Faridah Azmi, Azlin Suhaida Influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber
description	Rubber based product has properties very different from the viscous latex of the rubber tree, Hevea brasiliensis. The properties of rubber latex are usually changed to enable it be used in production of many rubber based products such as tires, hoses, and etc. To strengthen it, the rubber undergoes vulcanization process where the addition of sulfur and heating the mixture under pressure is done which results in the formation of sulfur-bridges between the hydrocarbon chains. It makes an economic sense to recycle spent rubber products. Prior to recycling, surface devulcanization of rubber is vital to produce the acceptable reprocessed product. Devulcanization is basically a process that cleaved the monosulfidic, disulfidic or polysulfidic of vulcanized rubber. The tensile strength of the new material is of paramount important. In this study, enzymatic devulcanization of rubber was performed. Design of Experiment and analysis was conducted using Design Expert® (Version 6.0.8) software, with a tensile strengths as the responses. Results showed that both factors tested, time of incubation and rubber concentration contributed significantly towards the strength of rubber products. Data shows that setting the incubation time for 4 hours with 4% w/v rubber in the incubation media results in the highest tensile strength of 10.7 MPa, an increase of 67% from the untreated control. In conclusion, the process conditions of the enzymatic devulcanization of used rubber product have been successfully optimized using tetrathionate hydrolase rich media, produced by Thiobacillus ferrooxidans. This information is important to improve enzymatic devulcanization method and finally to increase the percentage of rubber recycling.
format	Article
author	Othman, Emeliana Yusof, Faridah Azmi, Azlin Suhaida
author_facet	Othman, Emeliana Yusof, Faridah Azmi, Azlin Suhaida
author_sort	Othman, Emeliana
title	Influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber
title_short	Influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber
title_full	Influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber
title_fullStr	Influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber
title_full_unstemmed	Influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber
title_sort	influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber
publisher	Penerbit Akademia Baru
publishDate	2017
url	http://irep.iium.edu.my/59632/ http://irep.iium.edu.my/59632/ http://irep.iium.edu.my/59632/1/P%2096.pdf
first_indexed	2023-09-18T21:24:29Z
last_indexed	2023-09-18T21:24:29Z
_version_	1777412100257218560

Influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber

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