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Moisture sorption/desorption behavior of various manmade cellulosic fibers
Author(s) -
Okubayashi Satoko,
Griesser Ulrich J.,
Bechtold Thomas
Publication year - 2005
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.21871
Subject(s) - lyocell , sorption , viscose , equilibrium moisture content , desorption , moisture , relative humidity , materials science , kinetics , chemical engineering , composite material , polymer chemistry , chemistry , adsorption , thermodynamics , fiber , organic chemistry , quantum mechanics , engineering , physics
The kinetics of dynamic water vapor sorption and desorption on viscose, modal, cotton, wool, down, and polyester fibers and lyocell knit fabrics were investigated according to the parallel exponential kinetics (PEK) model. The total equilibrium moisture regain ( M inf(total) ) in all the materials decreased with increasing temperature. However, the partial equilibrium fast sorption, determined by PEK simulation at 60% relative humidity (RH) and 36°C, was larger than that at 20°C, whereas the partial equilibrium slow sorption was smaller. The characteristic times in fast sorption (τ 1 ) and in slow sorption (τ 2 ) for lyocell were reduced when the conditions were changed from 60% RH and 20°C to 36°C, whereas those for the other fibers increased. Lyocell exhibited the highest M inf(total) value and the lowest τ 1 and τ 2 values, and this suggested high equilibrium moisture content and fast moisture uptake/release, that is, high moisture accessibility for lyocell. The relationships between the moisture regain, hysteresis, water retention capacity, and Brunauer–Emmett–Teller surface volume in the materials were also examined. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1621–1625, 2005