Properties and sorption studies of chitosan-polyvinyl alcohol blend films.

Srinivasa, P. C. and Ramesh, M. N. and Kumar, K. R. and Tharanathan, R. N. (2003) Properties and sorption studies of chitosan-polyvinyl alcohol blend films. Carbohydrate Polymers, 53 (4). pp. 431-438.

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Abstract

Physicochemical properties of films prepared from blends of chitosan and polyvinyl alcohol (PVA) were investigated. Films contained chitosan:PVA ratios of 100:0, 80:20, 60:40, 40:60, 20:80 or 0:100. Increases in the chitosan contents of the films led to improved optical properties, increased tensile strength and decreased percentage elongation at break. Moisture contents increased with increases in PVA concn. Moisture sorption isotherms demonstrated a sigmoid pattern. Of the 8 models used to describe the moisture sorption data, the best fit was achieved with the GAB model.

Item Type:	Article
Uncontrolled Keywords:	FILMS-; MECHANICAL-PROPERTIES; OPTICAL-PROPERTIES; PLASTICS-; POLYSACCHARIDES-; SORPTION-; CHITOSAN-; MOISTURE-SORPTION; POLYVINYL-ALCOHOL
Subjects:	500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 27 Polymer Chemistry
Divisions:	Food Packaging Technology Food Engineering Dept. of Biochemistry
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	29 Jun 2009 06:13
Last Modified:	28 Dec 2011 09:59
URI:	http://ir.cftri.res.in/id/eprint/7578

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