Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/40509

TitleUltrasound enhances lipase-catalyzed synthesis of poly (ethylene glutarate)
Author(s)Xiaoman Zhao
Bansode, Sneha Ramrao
Ribeiro, Artur J.
Abreu, Ana S.
Oliveira, César
Parpot, Pier
Gogate, P. R.
Rathod, V. K.
Paulo, Artur Cavaco
KeywordsUltrasound
Lipase
Solvent-free synthesis
Poly (ethylene glutarate)
Kinetics
Issue date2016
PublisherElsevier B.V.
JournalUltrasonics Sonochemistry
CitationZhao, 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.
TypeArticle
URIhttp://hdl.handle.net/1822/40509
DOI10.1016/j.ultsonch.2016.02.005
ISSN1350-4177
e-ISSN1350-4177
Publisher versionhttp://www.journals.elsevier.com/ultrasonics-sonochemistry/
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series
CDQuim - Artigos (Papers)

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