Ultrasound enhances lipase-catalyzed synthesis of poly (ethylene glutarate) |
| |
| Affiliation: | 1. Jiangsu Engineering Technology Research Center for Functional Textiles, Jiangnan University, Wuxi 214122, China;2. International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi 214122, China;3. Department of Chemical Engineering, The Institute of Chemical Technology, Mumbai 400019, India;4. CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal;5. Institute of Polymers and Composites (IPC) and Institute of Nanostructures, Nanomodelling and Nanofabrication (I3N), University of Minho, Campus de Azuém, Guimarães 4800-058, Portugal;6. Centre of Chemistry, Departament of Chemistry, Universidade do Minho, Campus Gualtar, Braga 4710-057, Portugal;1. Teagasc Food Research Centre, Dublin, Ireland;2. Food Packaging Group, School of Food and Nutritional Sciences, University College Cork, Cork, Ireland;1. Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Road, Taipei 106, Taiwan, ROC;2. Department of Civil and Environmental Engineering, University of Delaware, Newark, DE 19716, USA;3. Department of Civil and Environmental Engineering, California State University, 800 N. State College Blvd., Fullerton, USA |
| |
| Abstract: | 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 h 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. |
| |
| Keywords: | Ultrasound Lipase Solvent-free synthesis Poly (ethylene glutarate) Kinetics |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
