Preparation and characterization of ductile PLA/PEG blend films for eco-friendly flexible packaging application

被引:36
作者
Shin, Hojun [1 ]
Thanakkasaranee, Sarinthip [2 ]
Sadeghi, Kambiz [1 ]
Seo, Jongchul [1 ]
机构
[1] Yonsei Univ, Dept Packaging, 1 Yonseidae Gil, Wonju 26493, Gangwon Do, South Korea
[2] Chiang Mai Univ, Fac Agroind, Div Packaging Technol, Chiang Mai 50100, Thailand
基金
新加坡国家研究基金会;
关键词
Ductility; Miscible blend; Biodegradable polymer; Melt extrusion; Flexible packaging; Industrial feasibility; POLYLACTIC ACID PLA; POLY(LACTIC ACID); MECHANICAL-PROPERTIES; POLYETHYLENE-GLYCOL; THERMAL-PROPERTIES; GLASS-TRANSITION; MORPHOLOGY; COPOLYMERS; NANOCOMPOSITES; BEHAVIOR;
D O I
10.1016/j.fpsl.2022.100966
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
Poly(lactic acid) (PLA) is the most common biodegradable polymer in the food packaging industry; however, its inherent brittleness limits its applicability. To overcome this limitation, we prepared PLA/poly(ethylene glycol) (PEG) blend films via solvent-free melt extrusion and investigated the effects of different molecular weights (MW) and concentrations of PEG on the thermal, mechanical, barrier, and morphological properties and transparency of the blend films. As the PEG concentration increased, the glass transition and cold crystallization temperatures of the PLA phase in the blend films decreased, i.e., crystallization improved. The tensile strength and elongation of the blend films increased at low PEG concentration, whereas tensile strength decreased and elongation increased at high PEG concentration, indicating an improvement in the ductility of PLA. The oxygen barrier property and transparency of the films improved at high PEG MW and concentration. These PLA/PEG blend films have potential applications as biodegradable flexible packaging materials.
引用
收藏
页数:10
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