Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 128, Issue -, Pages 429-434Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2019.01.170
Keywords
Polyhydroxyalkanoates; Poly(3-hydroxybutyrate-co-3-hydroxyvalerate); Production; Properties
Funding
- ADEME
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With increasing concerns about future oil depletion and plastic pollution, bioplastics saw an increasing interest from scientists and industrials. Among bioplastics, the polyhydroxyalkanoates (PHA) are a promising family of polyester which are both biosourced and biodegradable. Biosynthesized by microorganisms, especially bacteria, control of their monomeric composition, and thus their thermal and mechanical properties, is still a challenge to really make tailor-made syntheses. Moreover, one way to decrease the high cost of production is to use waste as substrates for the microorganisms. In this study, a marine bacteria, Halomonas sp. SF2003 was grown on agroindustrial effluents as the sole carbon sources and was able to produce poly(3-hydroxybutyrate) (PHB) with a productivity of 13 g.L-1 in 40 h of culture and a number-average molar weight of 342,000 g.mol(-1). With the addition of valeric acid in the substrates, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBHV) with controlled proportion of hydroxyvalerate (HV) monomers were obtained. Their thermal and mechanical characteristics were investigated as a function of HV amount and showed a decrease of the glass transition and melting temperatures and in Young modulus with the HV content increase. (C) 2019 Elsevier B.V. All rights reserved.
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