Origanum, Research Updates|

In this study, 10 wt% sugarcane bagasse fiber-reinforced starch foam composites were prepared with different oregano essential oil (OEO) contents in the range of 2–8 wt% to improve the antimicrobial effectiveness of bioactive packaging. FT-IR analysis confirms that OEO penetrates into starch foam composite. From the result of antimicrobial activity, the incorporation of 8 wt% OEO in starch foam composite achieves the minimum inhibitory concentration against Escherichia-coli (E. coli) and Staphylococcus-aureus (S. aureus). OEO is more effective against S. aureus (Gram-positive bacteria) than E. coli (Gram-negative bacteria). The water absorption capacity and hygroscopicity of foam composite decrease with increasing OEO content. The lowest monolayer value is observed in starch foam composite containing 8 wt% OEO. The soil biodegradation rate and flexural strength of samples slightly decrease with increasing OEO content. As a result, starch foam composite containing OEO can be applied as bioactive packaging to preserve foods.

Reference: Ketkaew, S., P. Kasemsiri, S. Hiziroglu, W. Mongkolthanaruk, R. Wannasutta, U. Pongsa and P. Chindaprasirt (2018). “Effect of Oregano Essential Oil Content on Properties of Green Biocomposites Based on Cassava Starch and Sugarcane Bagasse for Bioactive Packaging.” Journal of Polymers and the Environment 26(1): 311-318.

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