Characterization of chitosan–whey protein films at acid pH

Chitosan application for active bio-based films production and potential in the food industry: Review

“…Recently, the capability to produce blend chitosan-whey protein bio-based films at acidic pH carrying a high amount of protein was demonstrated even though under the studied conditions a pure whey protein film could not be obtained (Ferreira, Nunes, Delgadillo, & Lopes-da-Silva, 2009). Authors reported that the obtained chitosan-whey protein based bio-based films were biphasic and characterized by a compositional gradient with the downward film surface containing a lower amount of protein than the upward surface.…”

“…Authors stated that although some of the film functionality might be compromised due to the incompatibility between the polysaccharide (chitosan) and the protein components within the film matrix, the blended bio-based films, especially those with intermediated protein amount, may have useful applications in those food systems where the edible bio-based films should break up during the cooking such as pizza or mastication process. In addition, in the reported study by Ferreira et al (2009) it was anticipated that the blend bio-based films would also have useful antimicrobial properties due to the presence of chitosan, but a subject needs further studies.…”

Carboxymethyl cellulose film from durian rind

“…WVTR is another property that is directly related to the hydrophilic nature of the film, i.e. more hydrophilic films will have greater WVTR (lower water vapor barrier) (Bourtoom & Chinnana, 2008;Ferreira, Nunes, Delgadillo, & Lopes-da-Silva, 2009;Tongdeesoontorn, Mauer, Wongruong, & Rachtanapun, 2009). This result can also be related to our result that the hydrophilic nature of the CMC d films increases with increasing carboxymethyl groups.…”

Hydrophobicity, thermal and micro-structural properties of whey protein concentrate–pullulan–beeswax films

“…As an example, milk protein based edible films have good mechanical strength and are excellent oxygen, lipid, and aroma barriers [1]. Whey protein derivatives have been studied frequently in the last decade for their film forming potentials due to their favorable functional properties and industrial surplus [2]. They are recognized to produce transparent, flexible, colorless, and odorless films.…”

“…Polysaccharides are well known for having good film-forming properties; besides, coatings made with these biopolymers or their blends are generally considered as effective gas barriers. In particular, the combination of protein with polysaccharides is an effective method in improving the performance of the films owing to their variability in physical properties and/or their interactions [2]. Pullulan (PUL) is a water-soluble microbial polysaccharide with excellent film-forming properties [6].…”