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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2281
Title: Microbial Degradation of Linseed Oil-Based Elastomer and Subsequent Accumulation of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate) Copolymer
Authors: Pramanik N.
Das R.
Rath T.
Kundu, Patit Paban
Published in: Applied Biochemistry and Biotechnology
Abstract: The microbial synthesis of environment-friendly poly(3-hydroxybutyrate--co-3-hydroxyvalerate), PHBV, has been performed by using an alkaliphilic microorganism, Alkaliphilus oremlandii OhILAs strain (GenBank Accession number NR_043674.1), at pH 8 and at a temperature of 30–32 °C through the biodegradation of linseed oil-based elastomer. The yield of the copolymer on dry cell weight basis is 90 %. The elastomers used for the biodegradation have been synthesized by cationic polymerization technique. The yield of the PHBV copolymer also varies with the variation of linseed oil content (30–60 %) in the elastomer. Spectroscopic characterization (1H NMR and FTIR) of the accumulated product through biodegradation of linseed oil-based elastomers indicates that the accumulated product is a PHBV copolymer consisting of 13.85 mol% of 3-hydroxyvalerate unit. The differential scanning calorimetry (DSC) results indicate a decrease in the melting (T<inf>m</inf>) and glass transition temperature (T<inf>g</inf>) of PHBV copolymer with an increase in the content of linseed oil in the elastomer, which is used for the biodegradation. The gel permeation chromatography (GPC) results indicate that the weight average molecular weight (M<inf>w</inf>) of PHBV copolymer decreases with an increasing concentration of linseed oil in the elastomer. The surface morphology of the elastomer before and after biodegradation is observed under scanning electron microscope (SEM) and atomic force microscope (AFM); these results indicate about porous morphology of the biodegraded elastomer.[Figure not available: see fulltext.] © 2014, Springer Science+Business Media New York.
Citation: Applied Biochemistry and Biotechnology (2014), 174(4): 1613-1630
URI: https://doi.org/10.1007/s12010-014-1061-5
http://repository.iitr.ac.in/handle/123456789/2281
Issue Date: 2014
Publisher: Humana Press Inc.
Keywords: Biodegradable
Linseed oil-based elastomer
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) copolymer
ISSN: 2732289
Author Scopus IDs: 56324545100
53663543700
14829487300
35475516300
Author Affiliations: Pramanik, N., Advanced Polymer Laboratory, Department of Polymer Science & Technology, University of Calcutta, Kolkata, 700009, India
Das, R., Advanced Polymer Laboratory, Department of Polymer Science & Technology, University of Calcutta, Kolkata, 700009, India
Rath, T., Advanced Polymer Laboratory, Department of Polymer Science & Technology, University of Calcutta, Kolkata, 700009, India
Kundu, P.P., Advanced Polymer Laboratory, Department of Polymer Science & Technology, University of Calcutta, Kolkata, 700009, India
Funding Details: Acknowledgments The authors gratefully acknowledge Technical Education Quality Improvement Programme (TEQIP) and CSIR grant-in-aid [No.02(0008)/11/EMR-II], Government of India for their financial support in this experimental work.
Corresponding Author: Kundu, P.P.; Advanced Polymer Laboratory, Department of Polymer Science & Technology, University of CalcuttaIndia
Appears in Collections:Journal Publications [CH]

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