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 rubbers based products such as tires, hoses, and etc. To strengthen it, the rubber undergo...
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Kulliyah of Engineering, International Islamic University Malaysia
2016
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| Online Access: | http://irep.iium.edu.my/51550/ http://irep.iium.edu.my/51550/ http://irep.iium.edu.my/51550/1/51550.pdf |
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iium-515502016-08-24T02:35:09Z http://irep.iium.edu.my/51550/ Influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber Othman, Emeliana Yusof, Faridah Azmi , Azlin Suhaida TD Environmental technology. Sanitary engineering TD785 Municipal refuse. Solid waste 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 rubbers 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, process optimization for the enzymatic devulcanization of rubber was performed. Design of Experiment and analysis was conducted using Design Expert® (Version 6.0.8) software, with the tensile strength as the response. 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. Kulliyah of Engineering, International Islamic University Malaysia 2016 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/51550/1/51550.pdf Othman, Emeliana and Yusof, Faridah and Azmi , Azlin Suhaida (2016) Influence of enzymatic devulcanization process conditions on the tensile strength of revulcanized rubber. In: 4th International Conference on Biotechnology Engineering 2016 (ICBioE 2016), 25th-27th July 2016, Kuala Lumpur. http://www.iium.edu.my/icbioe/2016/ |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
International Islamic University Malaysia |
| building |
IIUM Repository |
| collection |
Online Access |
| language |
English |
| topic |
TD Environmental technology. Sanitary engineering TD785 Municipal refuse. Solid waste |
| spellingShingle |
TD Environmental technology. Sanitary engineering TD785 Municipal refuse. Solid waste 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
rubbers 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, process optimization for the enzymatic devulcanization of rubber was performed. Design of
Experiment and analysis was conducted using Design Expert® (Version 6.0.8) software, with the tensile
strength as the response. 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 |
Conference or Workshop Item |
| 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 |
Kulliyah of Engineering, International Islamic University Malaysia |
| publishDate |
2016 |
| url |
http://irep.iium.edu.my/51550/ http://irep.iium.edu.my/51550/ http://irep.iium.edu.my/51550/1/51550.pdf |
| first_indexed |
2023-09-18T21:12:59Z |
| last_indexed |
2023-09-18T21:12:59Z |
| _version_ |
1777411376339222528 |