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Degradation Behavior of Aliphatic–Aromatic Polyesters : from Microplastic-free Composting to Enzyme-Driven Recycling Possibility

Titelangaben

Upadhyay, Ashank ; Turak, Onur ; Fulajtar, Emilia ; Greve, Christopher ; Herzig, Eva M. ; Höcker, Birte ; Agarwal, Seema:
Degradation Behavior of Aliphatic–Aromatic Polyesters : from Microplastic-free Composting to Enzyme-Driven Recycling Possibility.
In: ACS Applied Polymer Materials. (2025) .
ISSN 2637-6105
DOI: https://doi.org/10.1021/acsapm.5c00296

Abstract

To develop a polymer that leaves no microplastic traces in compost and is recyclable, this study investigates the degradation behavior of custom-designed synthetic aliphatic–aromatic polyesters. These polyesters, synthesized via melt polycondensation from 1,4-benzenedimethanol and aliphatic diacids of varying chain lengths, underwent comprehensive degradation experiments in alkaline solutions, industrial compost, sludge water, and with five enzymes: commercially obtained Hi-Cutinase (HiC), Esterase EL-01, and in-house-produced Ideonella sakaiensis PETase (IsPETase), Cryptosporangium aurantiacum PETase variant M9(CaPETase), and metagenomic leaf-branch compost cutinase variant ICCG (LCCICCG). The degradation behavior was correlated with polymer properties, including chemical structure, melting point, hydrophobicity, and crystallinity. Spiking and compost extraction experiments confirmed complete degradation of all polyesters under study within 12 weeks in industrial compost, leaving no detectable plastic residues. Enzymatic studies identified HiC as the most effective enzyme for these polyesters at 30 °C, while odd-carbon-containing polyesters served as good substrates for Esterase EL-01, HiC, and IsPETase. In contrast, aromatic PET, even with low crystallinity, showed no enzymatic specificity with these enzymes.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Professur Experimentalphysik VII - Dynamik und Strukturbildung > Professur Experimentalphysik VII - Dynamik und Strukturbildung - Univ.-Prof. Dr. Eva M. Herzig
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Makromolekulare Chemie II
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Biochemie III - Proteindesign > Lehrstuhl Biochemie III - Proteindesign - Univ.-Prof. Dr. Birte Höcker
Profilfelder > Advanced Fields > Polymer- und Kolloidforschung
Forschungseinrichtungen > Sonderforschungsbereiche, Forschergruppen > SFB 1357 - MIKROPLASTIK
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 31 Mär 2025 06:30
Letzte Änderung: 31 Mär 2025 08:15
URI: https://eref.uni-bayreuth.de/id/eprint/93057