Optimization of chitosan biofilm properties by addition of caraway essential oil and beeswax

Hromiš, Nevena; Lazić, Vera; Markov, Siniša; Vaštag, Žužana; Popović, Senka; Šuput, Danijela; Džinić, Natalija; Velićanski, Aleksandra; Popović, Ljiljana

doi:10.1016/j.jfoodeng.2015.01.001

Cited by 110 publications

(52 citation statements)

References 37 publications

(41 reference statements)

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“…The homogenization of the solution was carried out for 24 h at room temperature (29ºC). Glycerol was added in a chitosan-plasticizer ratio of 2:1 for all chitosan solutions 1 . Carnauba wax was incorporated into film-forming solutions at 0, 15, 30, 40 and 50% (w/w) and Tween 20 was added as a surfactant in a 1:0.5 wax/ surfactant weight ratio.…”

Section: Preparation Of Filmsmentioning

confidence: 99%

“…Carnauba wax was incorporated into film-forming solutions at 0, 15, 30, 40 and 50% (w/w) and Tween 20 was added as a surfactant in a 1:0.5 wax/ surfactant weight ratio. The amounts of carnauba wax and Tween 20 were defined according to preliminary tests and based on literature data 1,12 . The lipid-free film was prepared as control film.The final film-forming solution was homogenized using a magnetic stirrer with heating (Model LUCA-0851 / Group Lucadema -Brazil) at 1000 rpm for 10 min until 85 º C (melting wax).…”

Section: Preparation Of Filmsmentioning

confidence: 99%

“…Where SOL is the percentage of solubilized material, M i is the initial mass and M f is the final mass of the films 1,18 . A modification of the ASTM E96-05 (McHugh et al) 19 gravimetric method was used to measure water vapor permeability (WVP) 20 .…”

Section: Film Propertiesmentioning

confidence: 99%

“…The addition of carnauba wax affected the films thicknesses, where a significant increase was observed when wax was incorporated into the formulation (Table 2), ranging from 0.0364-0.0858 mm.When the wax content increases the higher molecular contact between the chitosan and wax compounds may weaken the aggregation forces of the polymer chain, making the matrix more open 1,3,31 . Other authors reported the same behavior with the addition of lipids to filmogenic solutions.…”

Section: Wvp and Thicknessmentioning

confidence: 99%

“…These coatings can provide many advantages such as improved appearance, antimicrobial properties, selective permeability for gases (CO 2 and O 2 ), low water vapor permeability, good mechanical properties, non-toxicity, non-polluting properties and low cost 1 . The antifungal and antioxidant activities of chitosan have been studied by several authors, along with their film formation ability.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the Addition of Carnauba Wax on Physicochemical Properties of Chitosan Films

et al. 2017

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Films and edible coatings of natural polymers have been proposed as an attractive alternative for conventional plastic packaging because of their excellent biodegradability and biocompatibility. However, natural polymers, like chitosan, are hydrophilic and present poor water barrier properties. The addition of wax or other hydrophobic substances decreases water permeability of natural polymers but can increases their opacity.The objective of this work was to produce biofilms based on chitosan and different concentrations of carnauba wax and analyze their optical and barrier properties. The films were obtained by dissolving chitosan in acetic acid. Carnauba wax was incorporated into filmforming solutions at0, 15, 30, 40 and 50% (w/w). The opacity increased with higher concentrations of wax, the film with 50% of wax showed the highest value with an increase of 10.5% compared to the control film. The water vapor permeability decreased from 2.73 g.mm/kPa.m 2 .h (0% of wax) to 0.77 g.mm/h.kPa.m 2 (40% of wax). The solubility decreased to about 60% over the control films, and the contact angle increased from 53º to 83º, in film with 0 and 50% of wax, respectively.

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Section: Preparation Of Filmsmentioning

confidence: 99%

Section: Preparation Of Filmsmentioning

confidence: 99%