Effect of mastic gum integration on improvement of polylactic acid biodegradable films
Yükleniyor...
Tarih
2023
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
John Wiley and Sons Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Currently, 90% of all packaging films are composed of non-renewable, petroleum-based materials. However, these materials have a significant environmental footprint. Polylactic acid (PLA) is a well-known biodegradable thermoplastic polymer. However, the use of PLA poses some inherent challenges, like the brittleness of PLA films. For this study, with the objective of overcoming the shortcomings of PLA films, mastic gum (MG), which is an under-utilized hydrophobic polymer, was incorporated into PLA, and the resultant films were characterized for their chemical (x-ray diffraction [XRD], Fourier-transform infrared [FTIR]), thermal (thermogravimetric analysis [TGA], dynamic mechanical analysis [DMA]), optical (optical microscope, color, and opacity), and barrier properties (water vapor permeability [WVP]). MG addition yielded films with much higher opacities and decreased WVPs up to 80%. Optical microscope images revealed the presence of some defects for films with MG concentrations above 1% g/g solvent, which also decreased the film's tear resistance. Glass transition temperature (Tg) values are reduced with MG addition, resulting in less rigid films at room temperature. In the end, MG incorporation yielded more flexible films with much better water barrier properties. In addition, all other properties of the films were drastically modified with MG addition. Hence, MG/PLA is demonstrated to be a promising biopolymer combination for the preparation of biodegradable films as a food packaging material.
Açıklama
Anahtar Kelimeler
Dispersion, Food packaging, Mastic gum, PLA, Tensile properties, WVP, XRD
Kaynak
Polymer Engineering and Science
WoS Q Değeri
Q2
Scopus Q Değeri
Cilt
63
Sayı
5
Künye
Emir, A. A., Akgün, M., & Kırtıl, E. (2023). Effect of mastic gum integration on improvement of polylactic acid biodegradable films. Polymer Engineering and Science, 63(5), 1539–1550. https://doi.org/10.1002/pen.26304
