[사] The Wicking Kinetics of Liquid Droplets into Yarns 출판일 : 2001.10.01 저자 : Xuemin Chen, Konstantin G. Kornev, Yash K. Kamath, Alexander V. Neimark 서지사항 : Textile Research Journal, Volume 71, No 10 (2001), 862-869 페이지 등록일 : 2012.08.20 I 조회수 : 81 작성자 : admin |
The wicking kinetics of liquid droplets into yarns is studied using a computerized imaging
system. A new method is suggested for characterizing the yarn structure by monitoring
droplet absorption. The method is based on the comparative analysis of the time needed for
droplet disappearance as a function of droplet volume for various yarns. A mathematical
model is developed to describe the wicking kinetics. We show that for wetting liquids, the
time of droplet absorption Tw is a linear function of the initial droplet volume squared V02.
For a given liquid-yarn pair, the slope of this relationship provides important information
about the yarn properties. The linear relationship between Tw and V02 is verified by
experimental data for a typical spin finish. The model predicts that droplet wicking can occur
even if the advancing contact angle θa is slightly greater than 90°. However, for nonwetting
liquids, the relationship between Tw and V02 is nonlinear, and a criterion for droplet
wicking into nonwetted yarns is obtained.
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