Multifunctional Films Based on Wheat Gluten and Microencapsulated Thyme Essential Oil  

作　　者：Norma E.Marcovich Matías Federico Hernández María Roberta Ansorena 

机构地区：[1]Instituto de Investigaciones en Ciencia y Tecnología de Materiales,Facultad de Ingeniería,Universidad Nacional de Mar del Plata-Consejo Nacional de Investigaciones Científicas y Técnicas,Mar del Plata,7600,Argentina [2]Grupo de Investigación en Ingeniería en Alimentos,Facultad de Ingeniería,Universidad Nacional de Mar del Plata-Consejo Nacional de Investigaciones Científicas y Técnicas,Mar del Plata,7600,Argentina

出　　处：《Journal of Renewable Materials》2024年第12期2049-2068,共20页可再生材料杂志（英文）

基　　金：This study received financial support from the Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET)(Grant#PIP 0855);the Agencia Nacional de Promoción de la Investigación,el Desarrollo Tecnológico y la Innovación(Agencia I+D+i)(Grant#PICT 03507);the Universidad Nacional de Mar del Plata(UNMdP)(Grant#22/G377).

摘　　要：In this work,active and edible films for food packaging were obtained by intensive mixing and compression molding of the wheat gluten(WG)glycerol-plasticized paste.Thyme essential oil(TEO,10 and 15 wt.%)was incorporated as the active component microencapsulated inβ-cyclodextrins(β-CD)and included directly into the biopolymer matrix for comparison.It was found that films incorporating microencapsulated TEO are more soluble in water(total soluble matter(dry method)of about 33%and 36.6%vs.22.4%and 18.6%,for films containing 10%and 15%TEO,respectively)but less rigid than those obtained with free oil(elastic tensile moduli of 6.9 and 3.1 vs.9.9 and 6.8 MPa,for films containing 10%and 15%TEO,respectively),although the water vapor permeability of the former is lower(4.95 10^(−9) and 6.29 10^(−9) vs.8.85 10^(−9) and 11.1310−9 g/Pa^(*)s^(*)m,for films containing 10%and 15%TEO,respectively).Active films containing both free and encapsulated TEO inhibited gram(+)as well as gram(−)bacteria and exhibited enlarged antioxidant properties,with the latter presenting slightly better performance.In addition,encapsulation slowed the release rate of TEO from the films,allowing the bioactive to remain active in the film for much longer.Therefore,the present work revealed that films prepared from TEO/β-CD microcapsules included in compression-molded wheat gluten matrices showed great potential to be used as an active food packaging.

关 键 词：Wheat gluten films thyme essential oil β-cyclodextrins thermoplastic processing 

分 类 号：TB43[一般工业技术]