Journal
LWT-FOOD SCIENCE AND TECHNOLOGY
Volume 43, Issue 3, Pages 415-420Publisher
ELSEVIER
DOI: 10.1016/j.lwt.2009.09.003
Keywords
Differential entropy; Equilibrium isotherms; Heat of sorption; Pore size
Categories
Funding
- CNPq (National Council of Scientific and Technological Development), Brazil
Ask authors/readers for more resources
The moisture equilibrium isotherms of chitosan were determined at 20, 30, 40, 50 and 60 degrees C, using the gravimetric static method. Experimental data were analyzed by the GAB, Oswin, Halsey and Smith equations. lsosteric heat and differential entropy of sorption were determined from the GAB model using the Clausius-Clapeyron and Gibbs-Helmholtz equations, and pore size distribution was calculated by the Kelvin and Halsey equations. The GAB and Oswin equations showed best fit to the experimental data with R-2 approximate to 99% and low mean relative deviation values (E% < 10%). Monolayer moisture content values (from 0.12 to 0.20 kg kg(-1)) and water surface area values (from 450 to 700 m(2) g(-1))decrease with increasing temperature. Iscisteric heat and differential entropy of sorption were estimated as a function of moisture content The Kelvin and Halsey equations were adequate for calculation of pore size distribution, which varied from 0.5 to 30 nm. (C) 2009 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available