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The promiscuous potential of cellulase in degradation of polylactic acid and its jute composite
Department of Biotechnology, University of Isfahan, Isfahan, Iran. (Swedish Centre for Resource Recovery)
University of Borås, Faculty of Textiles, Engineering and Business. (Swedish Centre for Resource Recovery)ORCID iD: 0000-0001-6804-9028
Department of Biotechnology, University of Isfahan, Isfahan, Iran.
University of Borås, Faculty of Textiles, Engineering and Business. (Swedish Centre for Resource Recovery)
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2021 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 278, article id 130443Article in journal (Refereed) Published
Abstract [en]

It has been suggested that cellulolytic enzymes can be effective on the degradation of PLA samples. The idea was investigated by examining the impact of cellulase on degradation of PLA and PLA-jute (64/36) composite in an aqueous medium. The obtained results demonstrated 55% and 61% thickness reduction in PLA and PLA-jute specimens after four months of treatment, respectively. Gel permeation chromatography (GPC) showed significant decline in the number average molecular weight (Mn) approximately equal to 85% and 80% for PLA and PLA-jute in comparison with their control. The poly dispersity index (PDI) of PLA and PLA-jute declined 41% and 49% that disclosed more homogenous distribution in molecular weight of the polymer after treatment with cellulase. The cellulase promiscuity effect on PLA degradation was further revealed by Fourier-transform infrared spectroscopy (FT-IR) analysis where substantial decrease in the peak intensities of the polymer related functional groups were observed. In addition, PLA biodegradation was studied in more detail by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA) of control and cellulase treated specimens. The obtained results confirmed the promiscuous function of cellulase in the presence or the absence of jute as the specific substrate of cellulase. This can be considered as a major breakthrough to develop effective biodegradation processes for PLA products at the end of their life cycle.

Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 278, article id 130443
Keywords [en]
Biodegradation, Cellulase, Composite, Jute, Polylactic acid (PLA), Promiscuous activity, Differential scanning calorimetry, Fourier transform infrared spectroscopy, Gel permeation chromatography, Jute fibers, Life cycle, Molecular weight, Polyesters, Thermogravimetric analysis, Aqueous media, Cellulolytic enzyme, Gel-permeation chromatography, Jute-composites, Number average molecular weight, Poly-dispersity, Polylactic acid, Thickness reduction, Composite materials, enzyme, enzyme activity, polymer, polyester, polylactide, infrared spectroscopy, Polymers, Spectroscopy, Fourier Transform Infrared
National Category
Bio Materials
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-25901DOI: 10.1016/j.chemosphere.2021.130443ISI: 000659471700085PubMedID: 33836399Scopus ID: 2-s2.0-85103707655OAI: oai:DiVA.org:hb-25901DiVA, id: diva2:1579857
Available from: 2021-07-12 Created: 2021-07-12 Last updated: 2022-11-15Bibliographically approved

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Bazooyar, FaranakZamani, AkramSkrifvars, Mikael

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