Characterization of biodegradable bi-layer films from thermoplastic starch and poly-l-lactic acid

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dc.authorid0000-0003-1173-5793
dc.authorid0000-0002-6777-273X
dc.authorid0000-0003-2225-7993
dc.contributor.authorParlak, Mahmut Ekrem
dc.contributor.authorUzuner, Kubra
dc.contributor.authorOzdemir, Sebahat
dc.contributor.authorKirac Demirel, Fatma Tuba
dc.contributor.authorDundar, Ayse Neslihan
dc.contributor.authorSahin, Oya Irmak
dc.contributor.authorSaricaoglu, Furkan Turker
dc.date.accessioned2026-02-08T15:14:45Z
dc.date.available2026-02-08T15:14:45Z
dc.date.issued2024
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractThis study aimed to enhance the oxygen barrier properties of polylactic acid (PLA) film, a biodegradable packaging material with high oxygen permeability (OP). Bi-layer films were produced by coating thermoplastic starch (TPS) onto PLA films in various ratios while maintaining constant film thickness. The mechanical, optical, barrier, thermal, hydrophobicity, moisture sorption, and microstructural properties of the films were analyzed. Increasing the TPS ratio elevated moisture content (MC), water uptake, solubility, and opacity while enhancing UV barrier properties. TPS coating reduced tensile and burst strength but increased the burst deformation of the bi-layer films. Bi-layer film production resulted in a water vapor permeability increase of 59.26%-94.44% compared with neat PLA while decreasing OP by 2.52%-29.66%. The equilibrium moisture content (EMC) rose with higher TPS ratios, displaying type II isotherms. FTIR analysis indicated no chemical interactions between PLA and TPS. Increasing the TPS ratio decreased PLA crystallinity, supporting the mechanical and barrier properties of the bi-layer films. Neat and bi-layer films exhibited smooth, homogeneous surfaces, with a visible interface in the cross-section of the bi-layer films. In conclusion, TPS shows promise as an alternative to improve oxygen barrier properties in PLA films without adversely affecting other properties.
dc.description.sponsorshipBursa Technical University
dc.description.sponsorshipThis research did not get any foundation from governmental and private sector organizations. The authors also thank Bursa Technical University for device support.
dc.identifier.doi10.1002/app.55378
dc.identifier.issn0021-8995
dc.identifier.issn1097-4628
dc.identifier.issue20
dc.identifier.scopus2-s2.0-85186887353
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1002/app.55378
dc.identifier.urihttps://hdl.handle.net/20.500.12885/5406
dc.identifier.volume141
dc.identifier.wosWOS:001176940200001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherWiley
dc.relation.ispartofJournal of Applied Polymer Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzWOS_KA_20260207
dc.subjectbiodegradable
dc.subjectbiopolymers and renewable polymers
dc.subjectmechanical Properties
dc.subjectpolysaccharides
dc.subjectthermoplastics
dc.titleCharacterization of biodegradable bi-layer films from thermoplastic starch and poly-l-lactic acid
dc.typeArticle

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