Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 418, Issue -, Pages 373-377Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2013.12.017
Keywords
Liquid penetration; Paper; Contact angle; Temperature dependence
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Funding
- International Doctoral Programme in Bioproducts Technology (PaPSaT)
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Mechanisms controlling short time water absorption and the effect of temperature on water absorption into paper were investigated by analyzing previously published data. A dynamic contact angle effect caused by contact line friction explained the liquid uptake dynamics at short times. The water absorption rate increase with temperature is suggested to be controlled by the molecular processes occurring in front of the advancing liquid front. The increase in the non-equilibrium vapor pressure at air-liquid interface leads to higher water molecule adsorption onto fibers and associated lowering of the solid-gas interfacial tension, thereby increasing the wetting velocity and water absorption. The classical LucasWashburn equation was found to be inadequate for predicting water absorption into paper both at short times and as a function of temperature. (C) 2013 Elsevier Inc. All rights reserved.
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