Electrospun Fibres of Polyhydroxybutyrate Synthesized by Ralstonia eutropha from Different Carbon SourcesReportar como inadecuado




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International Journal of Polymer Science - Volume 2014 2014, Article ID 705359, 11 pages -

Research Article

Faculty of Science and Engineering, University of Wolverhampton, Wulfruna Street, Wolverhampton WV1 1SB, UK

Biomaterials Group, School of Metallurgy and Materials, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK

Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Skłodowska Street, 41-819 Zabrze, Poland

Received 24 June 2014; Accepted 26 August 2014; Published 11 September 2014

Academic Editor: Yulin Deng

Copyright © 2014 Victor U. Irorere et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The properties of PHB may be affected by the carbon source used in its production and this may affect nanofibres made from this polymer by electrospinning. In this study, P3-HB was produced from glucose, rapeseed oil, and olive oil by Ralstonia eutropha H16. Cell growth and polymer production were higher in olive or rapeseed oil supplemented media compared to glucose supplemented media. FT-IR,

H-,

C-NMR, and ESI-MS

confirmed that the synthesized polymers were P3-HB. SEM micrograph showed the formation of nanofibres from P3-HB samples with the fibre diameters dependent on the source of the carbon used in polymer synthesis and the concentration of the polymer in the electrospinning solution. GPC showed that P3-HB from glucose G-PHB had a higher molecular weight  gmol

compared to P3-HB from rapeseed R-PHB and olive O-PHB oil. Differential scanning calorimetry DSC showed that the crystallinity of the electrospun polymers reduces with decreasing polymer concentration with R-PHB having lower crystallinity at all concentrations used. These observation shows that more PHB yield can be obtained using either rapeseed or olive oil compared to glucose with glucose producing polymers of higher molecular weight. It also show that electrospinning could be used to reduce the crystallinity of PHB fibres.





Autor: Victor U. Irorere, Soroosh Bagheriasl, Mark Blevins, Iwona Kwiecień, Artemis Stamboulis, and Iza Radecka

Fuente: https://www.hindawi.com/



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