Development of starch‐furcellaran‐gelatin films containing tea tree essential oil

Abstract

Tea tree essential oil (TEO) was added in different concentrations (2%, 4%, and 6%) to starch/furcellaran/gelatin (S/F/G) films. Film solubility of S/F/G film significantly decreased when containing 6% TEO (P ≤ 0.05). Referring to the control sample (without TEO), water content decreased with increasing concentration of oil. Films with 4% and 6% TEO exhibited a significant decrease (P ≤ 0.05) in tensile strength, and Young's modulus. The amounts of TEO had no significant on the elongation at break (P ≤ 0.05). Analysis obtained by Fourier transform infrared spectroscopy exhibited some insights on the possible interactions between polysaccharides, protein, and essential oil. The thermal stability of the film was decreased by TEO addition. The antioxidant properties proved to be significantly enhanced with addition of TEO into films. S/F/G films incorporated with TEO showed antimicrobial activity against Staphylococcus aureus and Escherichia coli, with inhibition zone diameters of 27.8 ± 0.29 mm and 18.4 ± 0.20 mm, respectively. Our results suggested that the S/F/G films containing TEO could be used as an active film which enhances microbial safety and the shelf-life of foods due to its good in vitro antioxidant and antimicrobial properties for food packaging applications.

Development of active cassava starch cellulose nanofiber‐based films incorporated with natural antimicrobial tea tree essential oil

“…Studies on furcellaran‐starch‐gelatin films with 2% of TTO show a peak at 1453 cm −1 band, related to the interaction between oil and matrix. However, only films with 6% of TTO exhibit peaks related to the stretching vibrations of CO groups present in the TTO . Although there are few differences between the peaks, it is important to mention that they were enough to change the film FTIR spectrum.…”

“…For example, Medina‐Jaramillo et al found water solubility for cassava starch–glycerol films incorporated with extracts of green tea ranged from 28 to 30% . The incorporation of 6% of TTO in a cassava starch‐gelatin‐furcellaran‐based films results in a 42% of solubility, a value 2.5 times higher than the solubilities of the present work …”

“…Peaks around 1542 and 1695 cm −1 are assigned to ─O─H─ bending of absorbed water . The F3 film (1.5% TTO) showed a presence of a peak around ~1490 cm −1 , this band indicates ─CC─ stretching, which is characteristic to the interaction between the matrix and the terpenes present in the TTO . No other film presents this particular band, indicating that in addition to the better distribution of the oil in the structure, as verified by SEM images, there is a better bond strength between the oil and matrix.…”

Effects of rice protein coating enriched with essential oils on internal quality and shelf life of eggs during room temperature storage

“…Tea tree is an essential oil of Melaleuca alternifolia, and it is a complex mixture of terpen hydrocarbons and tertiary alcohols. Its main components are terpinen‐4‐ol and 1.8‐cineole (Jamróz et al, 2018 ). The copaíba presents different amounts of substances in the oil composition.…”

Furcellaran-Coated Microcapsules as Carriers of Cyprinus carpio Skin-Derived Antioxidant Hydrolysate: An In Vitro and In Vivo Study

“…A significantly lower level of malonaldehyde was observed in the blood of animals fed with CSGH encapsulated in microcapsules compared with animals fed the CSGH diet not subjected to microencapsulation. According to Jamróz et al [39], furcellaran has naturally-occurring polyphenols with antioxidant activity. It has been proven that polyphenols derived from marine algae have the ability to suppress the increase in lipid peroxidation levels in laboratory animal organisms [40].…”