TY - JOUR ID - 73628 TI - Characterisation of biocomposite film made of kefiran and carboxymethyl cellulose (CMC) JO - Journal of Food and Bioprocess Engineering JA - JFABE LA - en SN - AU - Motedayen, Ali Akbar AU - Khodaiyan, Faramarz AU - Atai Salehi, Esmail AU - Hosseini, Seyed Saeid AD - Department of Food Science and Technology, Quchan Branch, Islamic Azad University, P.O. Box 9479176135, Quchan, Iran AD - Bioprocessing and Biodetection Laboratory, Department of Food Science and Engineering, University of Tehran, Karaj 31587-77871, Iran Y1 - 2019 PY - 2019 VL - 2 IS - 1 SP - 61 EP - 70 KW - Kefiran KW - Carboxy methyl cellulose KW - composite films KW - Mechanical properties KW - Water-vapor permeability DO - N2 - This study was carried out to characterize the physical, mechanical and barrier properties of kefiran-carboxy methyl cellulose (CMC) biocomposite films in function with CMC content. Films were prepared by combining these two biopolymers and adding glycerol as plasticizer. Film-forming solutions of different ratios of kefiran to CMC were cast at room temperature. Increasing CMC content from 0 to 50 % (v/v) increased the tensile strength and extensibility of the composite films; however, with further CMC addition these mechanical properties decreased. The water-vapor permeability (WVP) of the films first decreased and then increased with CMC addition. The microstructure of the films was observed by scanning electron microscopy and atomic-force microscopy. The morphology study of the films showed rougher surfaces with increasing CMC amounts. Dynamic mechanical thermal analysis (DMTA) curves showed a single Tg, and addition of CMC at all levels increased the glass-transition temperature of films. These results indicated that these two film-forming components were compatible, and that an interaction existed between them. UR - https://jfabe.ut.ac.ir/article_73628.html L1 - https://jfabe.ut.ac.ir/article_73628_be3fb85ff0bfcc55ca1ad5d9d82c79c5.pdf ER -