Ultrasound-assisted enzymatic synthesis of poly-ε -caprolactone: kinetic behavior and reactor design
Lipase-mediated, ultrasound-assisted synthesis of poly-ε-caprolactone was investigated. It was found that ultrasound irradiation helped to improve the rate constant of poly-ε-caprolactone chain propagation (kp) at high initial monomer (ε-caprolactone) concentration. The enhancement of kp ranged...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/9633/1/00013161_103468.pdf |
| _version_ | 1825719738488061952 |
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| author | Gumel, A.M. Annuar, M.S.M. Chisti, Y. |
| author_facet | Gumel, A.M. Annuar, M.S.M. Chisti, Y. |
| author_sort | Gumel, A.M. |
| collection | UM |
| description | Lipase-mediated, ultrasound-assisted synthesis
of poly-ε-caprolactone was investigated. It was found
that ultrasound irradiation helped to improve the rate
constant of poly-ε-caprolactone chain propagation (kp)
at high initial monomer (ε-caprolactone) concentration.
The enhancement of kp ranged from 34% to 46% at 22.5–
18.0 M initial monomer concentration, respectively. In a
system proned to time-dependent mass-transfer limitation
due to polymer chain extension, the acoustic effects
could have also allowed the reaction to continue longer
compared to non-sonicated process until it became
impossible at highly elevated reaction mixture
viscosity (>2,000 times increase from initial viscosity).
Consequently, it also helped to improve monomer conversion.
In a continuous flow polymerization system, a
plug flow reactor system is recommended due to its lowest
volume for maximum conversion compared to a continuously
stirred tank reactor system. |
| first_indexed | 2024-03-06T05:24:20Z |
| format | Article |
| id | um.eprints-9633 |
| institution | Universiti Malaya |
| language | English |
| last_indexed | 2024-03-06T05:24:20Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | um.eprints-96332014-04-22T02:12:38Z http://eprints.um.edu.my/9633/ Ultrasound-assisted enzymatic synthesis of poly-ε -caprolactone: kinetic behavior and reactor design Gumel, A.M. Annuar, M.S.M. Chisti, Y. Q Science (General) QD Chemistry Lipase-mediated, ultrasound-assisted synthesis of poly-ε-caprolactone was investigated. It was found that ultrasound irradiation helped to improve the rate constant of poly-ε-caprolactone chain propagation (kp) at high initial monomer (ε-caprolactone) concentration. The enhancement of kp ranged from 34% to 46% at 22.5– 18.0 M initial monomer concentration, respectively. In a system proned to time-dependent mass-transfer limitation due to polymer chain extension, the acoustic effects could have also allowed the reaction to continue longer compared to non-sonicated process until it became impossible at highly elevated reaction mixture viscosity (>2,000 times increase from initial viscosity). Consequently, it also helped to improve monomer conversion. In a continuous flow polymerization system, a plug flow reactor system is recommended due to its lowest volume for maximum conversion compared to a continuously stirred tank reactor system. 2013 Article PeerReviewed application/pdf en http://eprints.um.edu.my/9633/1/00013161_103468.pdf Gumel, A.M. and Annuar, M.S.M. and Chisti, Y. (2013) Ultrasound-assisted enzymatic synthesis of poly-ε -caprolactone: kinetic behavior and reactor design. International Journal of Chemical Reactor Engineering, 11 (1). pp. 609-617. DOI https://doi.org/10.1515/ijcre-2013-0115 <https://doi.org/10.1515/ijcre-2013-0115>. doi 10.1515/ijcre-2013-0115 |
| spellingShingle | Q Science (General) QD Chemistry Gumel, A.M. Annuar, M.S.M. Chisti, Y. Ultrasound-assisted enzymatic synthesis of poly-ε -caprolactone: kinetic behavior and reactor design |
| title | Ultrasound-assisted enzymatic synthesis of poly-ε
-caprolactone: kinetic behavior and reactor design |
| title_full | Ultrasound-assisted enzymatic synthesis of poly-ε
-caprolactone: kinetic behavior and reactor design |
| title_fullStr | Ultrasound-assisted enzymatic synthesis of poly-ε
-caprolactone: kinetic behavior and reactor design |
| title_full_unstemmed | Ultrasound-assisted enzymatic synthesis of poly-ε
-caprolactone: kinetic behavior and reactor design |
| title_short | Ultrasound-assisted enzymatic synthesis of poly-ε
-caprolactone: kinetic behavior and reactor design |
| title_sort | ultrasound assisted enzymatic synthesis of poly ε caprolactone kinetic behavior and reactor design |
| topic | Q Science (General) QD Chemistry |
| url | http://eprints.um.edu.my/9633/1/00013161_103468.pdf |
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