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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
Angaben zu Projekten
| Projekttitel: |
Offizieller Projekttitel Projekt-ID SFB 1585: Strukturierte Funktionsmaterialien für multiplen Transport in nanoskaligen räumlichen Einschränkungen 492723217 Röntgenstreugerät zur Dünnfilmanalyse 438562776 SFB 1357: MIKROPLASTIK – Gesetzmäßigkeiten der Bildung, des Transports, des physikalisch-chemischen Verhaltens sowie der biologischen Effekte: Von Modell- zu komplexen Systemen als Grundlage neuer Lösungsansätze 391977956 |
|---|---|
| Projektfinanzierung: |
Deutsche Forschungsgemeinschaft |
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.