Fabrication of electrospun polylactic acid nanofilm incorporating cinnamon essential oil/β-cyclodextrin inclusion complex for antimicrobial packaging

• Published in: Food chemistry Vol. 196; pp. 996 - 1004
• Main Authors: Wen, Peng, Zhu, Ding-He, Feng, Kun, Liu, Fang-Jun, Lou, Wen-Yong, Li, Ning, Zong, Min-Hua, Wu, Hong
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.04.2016
• Subjects: Anti-Infective Agents - pharmacology; Antimicrobial activity; beta-Cyclodextrins - chemistry; CEO/β-CD inclusion complex; Cinnamomum zeylanicum - chemistry; Electrospinning; Escherichia coli - drug effects; Food Packaging; Lactic Acid - chemistry; Microbial Sensitivity Tests; Nanofibers; Nanofilm; Oils, Volatile - pharmacology; Polyesters; Polylactic acid; Polymers - chemistry; Spectroscopy, Fourier Transform Infrared; Staphylococcus aureus - drug effects; Electrospinning; Nanofilm; Antimicrobial activity; CEO/β-CD inclusion complex; Polylactic acid
• ISSN: 0308-8146; 1873-7072
• DOI: 10.1016/j.foodchem.2015.10.043

•CEO/β-CD-IC was successfully incorporated into PLA nanofiber via electrospinning.•PLA/CEO/β-CD nanofilm exhibited high thermal stability and antimicrobial activity.•Electrospinning is favorable for maintaining CEO compared with casting method.•The PVA/CEO/β-CD nanofilm can effectively prolong the shelf-life of pork. A novel antimicrobial packaging material was obtained by incorporating cinnamon essential oil/β-cyclodextrin inclusion complex (CEO/β-CD-IC) into polylacticacid (PLA) nanofibers via electrospinning technique. The CEO/β-CD-IC was prepared by the co-precipitation method and SEM and FT-IR spectroscopy analysis indicated the successful formation of CEO/β-CD-IC, which improved the thermal stability of CEO. The CEO/β-CD-IC was then incorporated into PLA nanofibers by electrospinning and the resulting PLA/CEO/β-CD nanofilm showed better antimicrobial activity compared to PLA/CEO nanofilm. The minimum inhibitory concentration (MIC) of PLA/CEO/β-CD nanofilm against Escherichia coli and Staphylococcus aureus was approximately 1mg/ml (corresponding CEO concentration 11.35μg/ml) and minimum bactericidal concentration (MBC) was approximately 7mg/ml (corresponding CEO concentration 79.45μg/ml). Furthermore, compared with the casting method, the mild electrospinning process was more favorable for maintaining greater CEO in the obtained film. The PLA/CEO/β-CD nanofilm can effectively prolong the shelf life of pork, suggesting it has potential application in active food packaging.