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Sorption of liquids by wool. Part II. Determination of partial specific volumes of wool
Author(s) -
Bradbury J. H.,
Leeder J. D.
Publication year - 1963
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1963.070070212
Subject(s) - wool , sorption , volume (thermodynamics) , desorption , acetone , absorption (acoustics) , chemistry , hysteresis , materials science , chemical engineering , analytical chemistry (journal) , polymer chemistry , chromatography , thermodynamics , adsorption , composite material , organic chemistry , engineering , physics , quantum mechanics
The partial specific volume of wool in water and various organic liquids is determined pyconometrically over the whole range of concentrations during absorption and desorption. Sorption of water in the range 0–2.5% by weight occurs with a constant volume contraction amounting to 36% of the volume of the liquid sorbed. This is due largely to electrostriction of water molecules sorbed on charged groups in the wool. Ethanol sorbed by wool undergoes a rearrangement within the fiber which increases considerably the volume contraction. Volume measurements performed during absorption and desorption indicate reversible behavior with water, n ‐propanol, isopropanol, and acetone on virgin wool and irreversibility (hysteresis) with n ‐butanol on virgin wool and with water on supercontracted wool.