Physico-chemical Characterization of Poly(3-Hydroxybutyrate) Produced by Halomonas salina, Isolated from a Hypersaline Microbial Mat

In this work, the characterization of poly(3-hydroxybutyrate) PHB produced by Halomonas salina isolated from a hypersaline microbial mat from Guerrero Negro, Baja California Sur, Mexico, is reported. The bacterial strain was able to produce isotactic PHB biopolymer with glucose (1%) as a single carb...

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Bibliographic Details
Published in:Journal of polymers and the environment 2019-05, Vol.27 (5), p.1105-1111
Main Authors: Hernández-Núñez, Emanuel, Martínez-Gutiérrez, Carolina Alejandra, López-Cortés, Alejandro, Aguirre-Macedo, Ma. Leopoldina, Tabasco-Novelo, Carolina, González-Díaz, Maria Ortencia, García-Maldonado, José Q.
Format: Article
Language:English
Subjects:
Bioplastics
Biopolymers
Biotechnology
Calorimetry
Carbon sources
Chemistry
Chemistry and Materials Science
Degree of crystallinity
Differential scanning calorimetry
Environmental Chemistry
Environmental Engineering/Biotechnology
Fourier transforms
Halomonas
Industrial Chemistry/Chemical Engineering
Isotacticity
Materials Science
Melt temperature
Microorganisms
NMR
Nuclear magnetic resonance
Organic chemistry
Original Paper
Poly-3-hydroxybutyrate
Polyhydroxyalkanoates
Polyhydroxyalkanoic acid
Polyhydroxybutyrate
Polymer Sciences
Polymers
Spectroscopy
Thermal stability
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Summary:In this work, the characterization of poly(3-hydroxybutyrate) PHB produced by Halomonas salina isolated from a hypersaline microbial mat from Guerrero Negro, Baja California Sur, Mexico, is reported. The bacterial strain was able to produce isotactic PHB biopolymer with glucose (1%) as a single carbon source. The chemical structure of the polymer obtained was confirmed by Fourier-transform infrared (FTIR) and Nuclear magnetic resonance (NMR) spectroscopy. The polymer was thermally stable up to 225 °C and Differential scanning calorimetry (DSC) analysis showed a melting temperature (T m ) of 173.6 °C. The obtained polymer presented a lower degree of crystallinity (39.3%) in comparison with PHB produced by other bacteria and polyhydroxyalkanoate co-polymers. Thus, the PHB biopolymer obtained in this study, could be recognized as more suitable for practical use, contributing to the repertoire of available bioplastics for further potential biotechnological applications, in which elastic polymers are needed.
ISSN:1566-2543
1572-8919
DOI:10.1007/s10924-019-01417-y