Abstract
Comparative analysis of the characteristics of supramolecular structures of dry and swollen cotton fibers makes it possible to differentiate structural regions accessible to water. The revealed features of water desorption from cotton cellulose (exceptionally low rates at the final stages, presence of residual moisture) are related to the removal of water, which is localized in the regions of the crystalline phase disorganized upon drying. The fact of incomplete moisture removal from cotton fibers at < 325 K is interpreted from the stand-point of the frozen molecular mobility in the microsurroundings of sorption sites, which are located at the defects of crystallites, at the final stage of the desorption process. A marked contribution from the recrystallization of disorganized regions in the surface layer of crystallites to the thermal effect of the interaction between water and cotton cellulose at low water content is established.
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Original Russian Text © N.A. Yakunin, A.E. Zavadskii, E.N. Yakunina, A.P. Moryganov, 2010, published in Vysokomolekulyarnye Soedineniya, Ser. A, 2010, Vol. 52, No. 2, pp. 217–222.
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Yakunin, N.A., Zavadskii, A.E., Yakunina, E.N. et al. Structural inhomogeneity in cotton cellulose upon its interaction with water. Polym. Sci. Ser. A 52, 134–138 (2010). https://doi.org/10.1134/S0965545X10020045
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DOI: https://doi.org/10.1134/S0965545X10020045