Food Control   2016 年 59 卷

2016.01.01

Electrospun polyvinyl alcohol/cinnamon essential oil/. ??-cyclodextrin (PVA/CEO/. ??-CD) antimicrobial nanofibrous film with average diameter 240?±40nm was successfully fabricated under the optimal conditions. The data of attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) and thermogravimetric analysis (TGA) indicated that CEO was encapsulated into ??-CD cavity and there existed molecular interaction among PVA, CEO and ??-CD, which enhanced the thermal stability of CEO. Water contact angle analysis showed that addition of CEO/. ??-CD made the nanofibrous film more hydrophilic. The PVA/CEO/. ??-CD nanofibrous film exhibited excellent antimicrobial activity, and its minimum inhibitory concentration (MIC) against Staphylococcus aureus and Escherichia coli was approximate 0.9-1mg/mL (corresponding CEO concentration 8.9-9.9??g/mL) and minimum bactericidal concentration (MBC) was approximate 7-8mg/mL (corresponding CEO concentration 69.3-79.2??g/mL). Furthermore, the mild electrospinning process was favorable for maintaining greater CEO in the film resulting in an improved antimicrobial activity compared with that of casting film. In addition, the PVA/CEO/. ??-CD nanofibrous film can effectively prolong the shelf-life of strawberry, indicating it is potential for the application in active food packaging.