Show simple item record Rosa, Gabriela Silveira Moraes, Mariana Agostini de Pinto, Luiz Antonio de Almeida 2016-10-15T18:10:18Z 2016-10-15T18:10:18Z 2010
dc.identifier.citation ROSA, Gabriela Silveira da; MORAES, Mariana Agostini de; PINTO, Luiz Antonio de Almeida. Moisture sorption properties of chitosan. LWT - Food Science and Technology, v. 43, n. 3, p. 415-420, 2010. Disponível em:<>. Acesso em: 15 Out. 2016. pt_BR
dc.identifier.issn 0023-6438
dc.description.abstract The moisture equilibrium isotherms of chitosan were determined at 20, 30, 40, 50 and 60 °C, using the gravimetric static method. Experimental data were analyzed by the GAB, Oswin, Halsey and Smith equations. Isosteric 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 R2 ≈ 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 m2 g−1) decrease with increasing temperature. Isosteric 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. pt_BR
dc.language.iso eng pt_BR
dc.publisher Elsevier pt_BR
dc.rights restrict access pt_BR
dc.subject Differential entropy pt_BR
dc.subject Equilibrium isotherms pt_BR
dc.subject Heat of sorption pt_BR
dc.subject Pore size pt_BR
dc.title Moisture sorption properties of chitosan pt_BR
dc.type article pt_BR
dc.identifier.doi 10.1016/j.lwt.2009.09.003 pt_BR

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