Miscibility studies of the blends of chitosan with some cellulose ethers

• Published in: Carbohydrate polymers Vol. 63; no. 2; pp. 238 - 244
• Main Authors: Yin, Jingbo, Luo, Kun, Chen, Xuesi, Khutoryanskiy, Vitaliy V.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 03-02-2006; Elsevier Science
• Subjects: Applied sciences; Blends; cellulose; Cellulose and derivatives; Cellulose ethers; Chitosan; composite polymers; Exact sciences and technology; films (materials); Hydrophilic films; Miscibility; Natural polymers; Physicochemistry of polymers; thermal analysis; ultrastructure; Miscibility; Hydrophilic films; Blends; Chitosan; Cellulose ethers; Polymer blends; Cellulose(methyl); Experimental study; Thermal stability; Morphology; Oside polymer; Thermodynamic properties; Cellulose ether; Hydrogen bond
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2005.08.041

The polymeric films have been prepared based on blends of chitosan with two cellulose ethers—hydroxypropylmethylcellulose and methylcellulose by casting from acetic acid solutions. The films were transparent and brittle in a dry state but an immersion of the samples in deionized water for over 24
h leads to their disintegration or partial dissolution. The miscibility of the polymers in the blends has been assessed by infrared spectroscopy, wide-angle X-ray diffraction, scanning electron microscopy and thermal gravimetric analysis. It was shown that although weak hydrogen bonding exists between the polymer functional groups the blends are not fully miscible in a dry state.