百里香酚
花青素
乳酸
纤维素
活性包装
化学
材料科学
极限抗拉强度
食品包装
溶剂
聚乳酸
生物降解
化学工程
有机化学
复合材料
食品科学
精油
聚合物
细菌
工程类
生物
遗传学
作者
Nurul 'Afifah Zabidi,Farhana Nazri,Intan Syafinaz Mohamed Amin Tawakkal,Mohd Salahuddin Mohd Basri,Roseliza Kadir Basha,Siti Hajar Othman
标识
DOI:10.1016/j.ijbiomac.2022.05.116
摘要
Active and pH-sensitive films of poly(lactic acid) (PLA)/nanofibrillated cellulose (NFC) have been fabricated and tested. The PLA and PLA/NFC films with 1.5% NFC were prepared via solvent casting method, with different loadings of essential oil (EO), including thymol and curry, being added at 5, 10, and 15%. The fixed content of anthocyanin powder (1%) was incorporated into the films as a pH indicator. The active PLA and PLA/NFC films were characterised on their physical, mechanical, thermal, and biodegradation properties. The addition of NFC reduced the tensile strength but increased the flexibility of films due to the plasticizing effect of EOs. The PLA/EO and PLA/NFC/EO films containing curry demonstrated a slightly higher strength than the films with thymol. The flexibility of films was increased at higher loading of EO regardless of the types of EO. The thermal profile demonstrated that the neat PLA film had a higher maximum degradation temperature than the active PLA/EO and PLA/NFC/EO films. The active PLA/EO and PLA/NFC/EO films containing anthocyanin successfully changed its colour in pH 2.0 and 14.0. The PLA/NFC films with thymol and anthocyanin formulation could inhibit fungus growth better in the cherry tomato sample than the PLA/NFC films with curry and anthocyanin.
科研通智能强力驱动
Strongly Powered by AbleSci AI