Effect of SBA-15-CEO on properties of potato starch film modified by low-temperature plasma

In order to improve the properties of potato starch film, cinnamon essential oil (CEO) encapsulated with mesoporous nano-silica (SBA-15) was added to the film and the potato starch dispersion was modified by low-temperature plasma (LTP). The effects of SBA-15-CEO on the physical, mechanical, antioxidant and antifungal properties of the film were investigated. Results revealed that the addition of SBA-15-CEO significantly improved the film properties. The water vapor transmission rate (WVTR) decreased from 14.01g/(m(2).h) to 12.75g/(m(2).h) with increasing concentrations of SBA-15-CEO. When 0.4 g/100 mL SBA-15-CEO was added, the oxygen transmittance rate (OTR) decreased from 8.113 x 10(-15)cm(2)s(-1)Pa(-1) to 3.017 x 10(-15)cm(2)s(-1)Pa(-1). The tensile strength (TS) and elongation at break (EB) reached maximum values when the dosage of SBA-15-CEO was 0.4 g/100 mL. The zeta potential (ZP) of the colloid solutions initially decreased and subsequently increased, corresponding to a minimum colloid solution ZP (0.947 mV) at 0.4 g/100 mL SBA-15-CEO, and a maximum (2.55 mV) at 0.8 g/100 mL SBA-15-CEO. Furthermore, the films with SBA-15-CEO exhibited antifungal and antioxidant activity. Moreover, the aggregation of SBA-15-CEO decreased with the addition of 0.4 g/100 mL, and the appearance of irregular and rough fractured surfaces were also alleviated. Fourier transform infrared (FTIR) spectroscopy revealed SBA-15-CEO to increase the hydrogen bonding of the film. This work proved the potential of LTP-PS/SBA-15-CEO (i.e., potato starch/SBA-15-CEO film modified by LTP) as an antioxidant and antifungal packaging material.

Automated summary

To improve the properties of potato starch film, cinnamon essential oil (CEO) encapsulated with mesoporous nano-silica (SBA-15) was added to the film and the potato starch dispersion was modified by low-temperature plasma (LTP). The addition of SBA-15-CEO significantly improved the physical, mechanical, antioxidant, and antifungal properties of the film. The results showed reduced water vapor transmission rate (WVTR) and oxygen transmittance rate (OTR), increased tensile strength (TS) and elongation at break (EB), and exhibited antifungal and antioxidant activity.