Characterization of antimicrobial films containing basil extracts

Abstract

The properties of low-density polyethylene (LDPE)-based films containing either linalool or methylchavicol as antimicrobial (AM) additives were evaluated. Slight decreases in transparency, water vapour and oxygen transmission rates were found in the extruded films containing 0.34% w/w linalool or methylchavicol. The infrared (IR) spectra of the AM films were similar to that of additive-free LDPE film. However, carbonyl peaks could also be observed in the spectra of the AM films. There was no significant difference in the degree of crystallinity and the melting temperature range of the different films. Derivative thermogravimetry mass-loss curves showed that the thermal decomposition temperatures of the AM films were marginally lower than that of LDPE film. Electron micrographs indicated that AM LDPE-based films exhibited no evidence of changes in microstructure to suggest that linalool and methylchavicol were not evenly distributed in the film.

Diffusion of linalool and methylchavicol from polyethylene-based antimicrobial packaging films

“…Although a loss of the active agents was observed during the 181 8 extrusion process, it was significantly lower than the losses observed in a previous study 182 with linear low-density polyethylene (LLDPE) alone (Suppakul et al, 2006). The actual 183 amount of linalool or methylchavicol in the extruded films was found to be 0.34% w/w in 184 each film.…”

Release of thymol from poly(lactic acid)-based antimicrobial films containing kenaf fibres as natural filler

“…The effect of temperature on the release rate of the AM agent was modelled in accordance with 240 the Arrhenius equation (Suppakul (2004): 241…”

Traceability of Active Compounds of Essential Oils in Antimicrobial Food Packaging Using a Chemometric Method by ATR-FTIR

“…Antimicrobial packaging, an innovative concept, can be defined as a kind of active packaging in which the package, the product, and the environment interact to reduce, inhibit, or retard the growth rate of microorganisms [11]. In these technologies, researchers are developing food packaging materials such as synthetic films [10] [11] [12] and edible films [16]- [22] with antimicrobial properties. Polymers are effective vehicles for the active substances [23], giving the possibility to incorporate different antimicrobial additives [1] [24] [25] [26].…”