Water Vapor Sorption by Chitin-Containing Materials

V. V. Ugrozov^a, S. D. Artamonova^b, F. F. Sharnina^c, V. P. Ivshin^c,
L. Yu. Grunin^d, and L. I. Kataeva^b

^a Moscow State University of Food Production, Volokolamskoe sh. 11, Moscow, 125080 Russia

^b Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia

^c Mari State University, pl. Lenina 1, Ioshkar Ola, 424000 Mari-El Republic, Russia

^d Mari State Technical University, pl. Lenina 3, Ioshkar Ola, 424000 Mari-El Republic, Russia

Received October 26, 2007

Abstract—Water vapor sorption by natural polysaccharides, namely, chitin–glucan complexes extracted from
native biomass of higher fungi, chitin of bees, Arthropoda chitin, and cotton cellulose, is studied. A model of
the sorption is proposed. It is shown that the analytical expression derived for sorption isotherms in terms of
this model satisfactorily describes the process for different chitin-containing materials in a wide range of
humidity. The main parameters of absorption isotherms are determined for examined samples. The analysis of
the experimental data indicates that chitin–glucan complexes obtained from fungi demonstrate higher sorption
ability, as compared with the reference sample of cotton cellulose and chitin of animal origin.

DOI: 10.1134/S1061933X0806015X

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