The Wicking Kinetics of Liquid Droplets into Yarns
| Autor: | Konstantin G. Kornev, Y.K. Kamath, Xuemin Chen, Alexander V. Neimark |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
010302 applied physics
Materials science Polymers and Plastics Kinetics Analytical chemistry 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology 01 natural sciences Linear function Contact angle Nonlinear system Linear relationship Volume (thermodynamics) 0103 physical sciences Chemical Engineering (miscellaneous) Wetting Absorption (chemistry) 0210 nano-technology |
| Zdroj: | Textile Research Journal. 71:862-869 |
| ISSN: | 1746-7748 0040-5175 |
| DOI: | 10.1177/004051750107101003 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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