Development of Chitosan and Polycaprolactone Based Trilayer Biocomposite Films for Food Packaging Applications

Authors : Ece SÖĞÜT, Atıf Can SEYDİM

Pages : 263-273

Doi:10.2339/politeknik.628222

View : 65 | Download : 12

Publication Date : 2021-03-01

Article Type : Research Paper

Abstract :Chitosan insert ignore into journalissuearticles values(CH); films were obtained by casting method and sandwiched between 2 layers of polycaprolactone insert ignore into journalissuearticles values(PCL);, which were formed by compression molding, to form trilayers. CH films were also incorporated with grape seed extract insert ignore into journalissuearticles values(G); insert ignore into journalissuearticles values(15%, w/w); and/or nanocellulose insert ignore into journalissuearticles values(N); insert ignore into journalissuearticles values(1-5%, w/w);. The tensile properties, transmittance, opacity, water vapor permeability insert ignore into journalissuearticles values(WVP);, antimicrobial activity, and release behavior of trilayers were determined. The elastic modulus insert ignore into journalissuearticles values(EM); of trilayer films were not significantly affected by the N content, while higher N concentrations resulted in higher tensile strength insert ignore into journalissuearticles values(TS); values. The incorporation of G led to higher elongation values and resulted in lower EM and TS values. Film samples, including N, presented lower WVP values, whereas higher WVP and water solubility values were obtained with G inclusion insert ignore into journalissuearticles values(p<0.05);. L* and transmittance values increased with the increasing N content while the opacity values decreased insert ignore into journalissuearticles values(p<0.05);. Furthermore, films added G showed significantly higher a* and b* values. The addition of N caused slower release of G from CH films through the selected food simulants. The obtained trilayer films also inhibited selected main pathogenic bacteria. The fabrication of PCL and CH films in the trilayer form enhanced the properties of CH and made these films more appropriate for food packaging.
Keywords : Chitosan, polycaprolactone, nanocellulose, grape seed extract

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