Synergism of Zinc Oxide/Organoclay-Loaded Poly(lactic acid) Hybrid Nanocomposite Plasticized by Triacetin for Sustainable Active Food Packaging  

作　　者：Ponusa Songtipya Thummanoon Prodpran Ladawan Songtipya Theerarat Sengsuk 

机构地区：[1]Center of Excellence in Bio-Based Materials and Packaging Innovation,Faculty of Agro-Industry,Prince of Songkla University,Hat Yai,Songkhla,90110,Thailand [2]Food Packaging Technology Program,Faculty of Agro-Industry,Prince of Songkla University,Hat Yai,Songkhla,90110,Thailand

出　　处：《Journal of Renewable Materials》2024年第5期951-967,共17页可再生材料杂志（英文）

基　　金：Prince of Songkla University(PSU),Hat Yai,Songkhla,Thailand(Grant Number AGR581246S).

摘　　要：The synergistic effect of organoclay(OC)and zinc oxide(ZnO)nanoparticles on the crucial properties of poly(lactic acid)(PLA)nanocompositefilms was systematically investigated herein.After their incorporation into PLA via the solvent casting technique,the water vapor barrier property of the PLA/OC/ZnOfilm improved by a maximum of 86%compared to the neat PLAfilm without the deterioration of Young’s modulus or the tensile strength.Moreover,thefilm’s self-antibacterial activity against foodborne pathogens,including gram-negative(Escherichia coli,E.coli)and gram-positive(Staphylococcus aureus,S.aureus)bacteria,was enhanced by a max-imum of approximately 98–99%compared to the neat PLAfilm.Furthermore,SEM images revealed the homo-geneous dispersion of both nano-fillers in the PLA matrix.However,the thermal stability of thefilm decreased slightly after the addition of the OC and ZnO.Thefilm exhibited notable light barrier properties in the UV-Vis range.Moreover,the incorporation of a suitable biodegradable plasticizer significantly decreased the Tg and notably enhanced theflexibility of the nanocompositefilm by increasing the elongation at break approxi-mately 1.5-fold compared to that of the neat PLAfilm.This contributes to its feasibility as an active food packa-ging material.

关 键 词：Poly(lactic acid)nanocomposite ORGANOCLAY zinc oxide barrier property antibacterial activity active food packaging 

分 类 号：TB33[一般工业技术—材料科学与工程]