Physiochemical properties and food application of antimicrobial PLA film

被引:51
作者
Gao, Haiyan [1 ]
Fang, Xiangjun [1 ]
Chen, Hangjun [1 ]
Qin, Yanhong [1 ]
Xu, Feifei [1 ]
Jin, Tony Z. [2 ]
机构
[1] Zhejiang Acad Agr Sci, Inst Food Sci, Key Lab Fruits & Vegetables Postharvest & Proc Te, Hangzhou 310021, Zhejiang, Peoples R China
[2] ARS, Eastern Reg Res Ctr, USDA, 600 E Mermaid Lane, Wyndmoor, PA 19038 USA
基金
对外科技合作项目(国际科技项目);
关键词
Antimicrobial packaging; Essential oil; Controlled release; Polylactic acid; Shelf life; Fresh produce; ALLYL ISOTHIOCYANATE; ESSENTIAL OILS; VAPOR-PHASE; RELEASE CHARACTERISTICS; LISTERIA-INNOCUA; INACTIVATION; SALMONELLA; COATINGS; MICROORGANISMS; CYCLODEXTRIN;
D O I
10.1016/j.foodcont.2016.11.017
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
Antimicrobial polylactic acid (PLA) films releasing allyl isothiocyanate (AIT) vapor were developed. The physicochemical properties and water vapor and gas permeability characteristics of the films were investigated, and the antimicrobial properties in vapor phase in food application were evaluated. The results reveal that the resultant antimicrobial (AM) PLA films had less strength, less stiffness and more flexibility, a lower O-2 and CO2 transmission rate, and a higher UV absorption rate than the pure PLA films. Avrami's equation showed the best fit with experimental release data (R-2 > 0.91) and indicated the release kinetics of AIT from the AM PLA film could be a combined mechanism of diffusion and first-order model. AM film treatment (4 x 8 cm film in 1 L box) significantly (p < 0.05) inhibited total aerobic bacterial growth in fresh pak choi stored at 4 and 10 degrees C for 15 days. The AM film treated pak choi had less color change and chlorophyll loss than the control samples during storage. The AM PLA film has the potential to be utilized for extending the shelf-life of various perishable food products. Published by Elsevier Ltd.
引用
收藏
页码:1522 / 1531
页数:10
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