Abstract
The cellulose-water vapour interaction has been investigated by near-infra-red spectrometric and ultra-high-frequency (UHF) methods. Spectra revealed 1.363 and 1.423 m bands of cellulose surface hydroxyls and transformation of these bands under the influence of adsorbed water molecules. The relation of the surface coverage to the sample's water content, the specific surface area of cellulose of about 90 and surface hydroxyl density of 2.5 OH were obtained using the simple model of hydroxyl arrangement on the inner surface of a cellulose fibre. Results of spectral and UHF measurements indicate that the saturation of hydrogen bonds of surface OH occurs at . During the monolayer formation stage the UHF wave absorption by molecules of adsorbed water is more than two times smaller than that for the phases of water on top of the monolayer. Surface parameters of cellulose are compared with those of divided silica.
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