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|Title:||Ultrasound enhances lipase-catalyzed synthesis of poly (ethylene glutarate)|
Bansode, Sneha Ramrao
Ribeiro, Artur J.
Abreu, Ana S.
Gogate, P. R.
Rathod, V. K.
Paulo, Artur Cavaco
Poly (ethylene glutarate)
|Citation:||Zhao, X.; Bansode, Sneha Ramrao; Ribeiro, Artur J.; Abreu, Ana S.; Oliveira, César; Parpot, Pier; Gogate, P. R.; Rathod, V. K.; Paulo, Artur Cavaco, Ultrasound enhances lipase-catalyzed synthesis of poly (ethylene glutarate). Ultrasonics Sonochemistry, 31, 506-511, 2016|
|Abstract(s):||The present work explores the best conditions for the enzymatic synthesis of poly (ethylene glutarate) for the first time. The start-up materials are the liquids; diethyl glutarate and ethylene glycol diacetate, without the need of addition of extra solvent. The reactions are catalyzed by lipase B from Candida antarctica immobilized on glycidyl methacrylate-ter-divinylbenzene-ter-ethylene glycol dimethacrylate at 40 °C during 18 h in water bath with mechanical stirring or 1 h in ultrasonic bath followed by 6 h in vacuum in both the cases for evaporation of ethyl acetate. The application of ultrasound significantly intensified the polyesterification reaction with reduction of the processing time from 24 to 7 h. The same degree of polymerization was obtained for the same enzyme loading in less time of reaction when using the ultrasound treatment. The degree of polymerization for long-term polyesterification was improved approximately 8-fold due to the presence of sonication during the reaction. The highest degree of polymerization achieved was 31, with a monomer conversion of 96.77%. The ultrasound treatment demonstrated to be an effective green approach to intensify the polyesterification reaction with enhanced initial kinetics and high degree of polymerization.|
|Appears in Collections:||CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series|
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