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https://hdl.handle.net/1822/40509
Título: | Ultrasound enhances lipase-catalyzed synthesis of poly (ethylene glutarate) |
Autor(es): | Xiaoman Zhao Bansode, Sneha Ramrao Ribeiro, Artur J. Abreu, Ana S. Oliveira, César Parpot, Pier Gogate, P. R. Rathod, V. K. Paulo, Artur Cavaco |
Palavras-chave: | Ultrasound Lipase Solvent-free synthesis Poly (ethylene glutarate) Kinetics |
Data: | 2016 |
Editora: | Elsevier B.V. |
Revista: | Ultrasonics Sonochemistry |
Citação: | 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 |
Resumo(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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/40509 |
DOI: | 10.1016/j.ultsonch.2016.02.005 |
ISSN: | 1350-4177 |
e-ISSN: | 1350-4177 |
Versão da editora: | http://www.journals.elsevier.com/ultrasonics-sonochemistry/ |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_34796_1.pdf | 961,04 kB | Adobe PDF | Ver/Abrir |