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Faster biodegradable and chemically recyclable polycaprolactone with embedded enzymes: Revealing new insights into degradation kinetics
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Polymer Technology.ORCID iD: 0000-0002-4638-755X
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Polymer Technology.
Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India, New Delhi.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Polymer Technology.ORCID iD: 0000-0002-7790-8987
2024 (English)In: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, Vol. 496, article id 153982Article in journal (Refereed) Published
Abstract [en]

Embedding immobilized lipase (IL) enzymes into polycaprolactone (PCL) matrix was demonstrated as a promising route to faster biodegradable and chemically recyclable PCL products. Furthermore, the materials could be thermally processed by extrusion and 3D printed by fused filament fabrication technique. The embedded-enzymes were shown to effectively accelerate the degradation of PCL under simulated industrial composting conditions and in aqueous solution in combination with external enzymes. To reveal deeper insights into the underlying mechanisms, the biodegradation kinetic parameters governing organic carbon (OC) mineralization were calculated. Furthermore, the concept of biodegradation half-life (B1/2) was introduced and correlated with the organic carbon (OC) mineralization rate of enzyme-embedded PCL films and filaments, especially under thermophilic composting conditions. This sheds light on how the incorporation of immobilized enzymes into PCL facilitates the degradation process. Furthermore, the feasibility of enzyme-catalyzed chemical recycling under mild conditions followed by enzyme-catalyzed repolymerization was demonstrated. The applied material design principle holds promise for addressing the pressing challenges associated with plastic waste, when moving forward towards a more sustainable and environmentally conscious future.

Place, publisher, year, edition, pages
Elsevier BV , 2024. Vol. 496, article id 153982
Keywords [en]
3D printing, Biodegradation, Chemical recycling, Composting, Embedded enzymes, Polycaprolactone
National Category
Polymer Technologies Polymer Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-350960DOI: 10.1016/j.cej.2024.153982Scopus ID: 2-s2.0-85198536679OAI: oai:DiVA.org:kth-350960DiVA, id: diva2:1885635
Note

QC 20240725

Available from: 2024-07-24 Created: 2024-07-24 Last updated: 2024-07-25Bibliographically approved

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Kalita, Naba KumarHazarika, DoliHakkarainen, Minna

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