Effects of tomato peel extract on morphological, chemical, thermal, and mechanical properties of poly(lactic acid)
Makaleler > Tam Makale · 2023
Yazarlar: Erinç Koçak, Mukaddes Şevval Çetin, Özlem ESMER, Hatice Aylin Karahan Toprakçı
Iranian Polymer Journal, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2023, cilt 32, ss 1135-1148
DOI: 10.1007/s13726-023-01187-4
Özet
<p>Poly(lactic acid) (PLA) is a sustainable, biodegradable polymer with high brittleness, elastic modulus, poor ductility, and</p><p>low tensile strain that might restrict packaging applications. The properties of PLA can be modified by the addition of various</p><p>materials. This study intended to reveal the effect of PLA with various concentrations of tomato peel extract (TPE)</p><p>on the morphological, structural, thermal, and mechanical properties of PLA/TPE biocomposites. TPE was incorporated</p><p>into the PLA matrix at 2, 4, and 6% w/w. The morphological analysis showed that films were successfully prepared by a</p><p>combination of solvent-casting and compression-molding. TPE was well dispersed at low concentrations, though at higher</p><p>concentrations above 2% w/w, an agglomeration of the TPE was observed. Thermal analysis revealed that the glass transition</p><p>temperature of the biocomposites decreased with increasing content of TPE. FTIR spectra of the biocomposites showed that</p><p>several components of TPE, such as phenolic compounds and fatty acid esters, could be incorporated into the matrix. Better</p><p>mechanical performance was obtained for 2 and 4% w/w of TPE content in terms of tensile strain (between 2.4 and 38%</p><p>higher compared to neat PLA) which was an indication of higher mechanical flexibility. These results showed the application</p><p>performance of TPE in packaging materials.</p>