Biosynthesis and Characterization of Poly (3-hydroxybutyrate-co-3-hydroxyvalerate-co-4-hydroxybutyrate) Terpolymer with Various Monomer Compositions by Cupriavidus sp USMAA2-4

Hema Ramachandran, and Nurhezreen Md Iqbal, and Coswald Stephen Sipaut @ Mohd Nasri, and Amirul Al-Ashraf Abdullah, (2011) Biosynthesis and Characterization of Poly (3-hydroxybutyrate-co-3-hydroxyvalerate-co-4-hydroxybutyrate) Terpolymer with Various Monomer Compositions by Cupriavidus sp USMAA2-4. Applied Biochemistry and Biotechnology, 164 (6). pp. 867-877. ISSN 0273-2289

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Official URL: http://dx.doi.org/10.1007/s12010-011-9180-8

Abstract

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-4-hydroxybutyrate) [P(3HB-co-3HV-co-4HB)] terpolymer was produced using Cupriavidus sp. USMAA2-4 via one-step cultivation process through combination of various carbon sources such as 1,4-butanediol or gamma-butyrolactone with either 1-pentanol, valeric acid, or 1-propanol. Oleic acid was added to increase the biomass production. The composition of 3HV and 4HB monomers were greatly affected by the concentration of 1,4-butanediol and 1-pentanol. Terpolymers with 3HV and 4HB molar fractions ranging from 2 to 41 mol.% and 5 to 31 mol.%, respectively, were produced by varying the concentration of carbon precursors. The thermal and mechanical properties of the terpolymers containing different proportions of the constituent monomers were characterized using gel permeation chromatography (GPC), DSC, and tensile machine. GPC analysis showed that the molecular weights (M (w)) of the terpolymer produced were within the range of 346 to 1,710 kDa. The monomer compositions of 3HV and 4HB were also found to have great influences on the thermal and mechanical properties of the terpolymer P(3HB-co-3HV-co-4HB) produced.

Item Type:Article
Uncontrolled Keywords:Biosynthesis, Terpolymer, One-step cultivation, 3-Hydroxyvalerate, 4-Hydroxybutyrate
Subjects:?? QK495 ??
Divisions:SCHOOL > School of Engineering and Information Technology
ID Code:1486
Deposited By:IR Admin
Deposited On:24 Jun 2015 12:36
Last Modified:24 Jun 2015 12:36

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