Spreading Performance of Superhydrophilic Fiber Network

Title
Spreading Performance of Superhydrophilic Fiber Network
Authors
김성진문명운이광렬장영수이대영김호영
Keywords
Micro&nano-structure; Hydrophilic; Non-woven fabric; Wicking
Issue Date
2010-03
Publisher
Joint International symposia on 3rd Micro and Nano Technology
Abstract
This article describes flowing characteristics of water on a fabric structure with superhydrophilic nature. The spreading speed on a hydrophilic fabric was known to be much faster than that on a hydrophilic flat surface due to the increase of the contact line between the fabric structures1. The increased capillarity with micro-fiber structure or porous structure is more powered up by adding a nano structure2, becoming a dual structure of the nanostructure on micro fiber structure as well as a superhydrophilic fabric structure. In this research, capillarity on superhydrophilic fabric structure is investigated from the spreading pattern of water flowing on the vertical surface in a gravitational field. As water flows on vertical flat solid surface always fall down in gravitational direction (i.e. gravity dominant flow), while water flows on vertical superhydrophilic fabric surface showed the capillary dominant spreading. As the capillary force overwhelms the gravitational force, flowing pattern, which is free from the effect of gravity, leading that the flow shape is kept as a circular. The ratio of driving force to resistant force helps to understand the nature of the categorization of flowing characteristics.
URI
http://pubs.kist.re.kr/handle/201004/38738
Appears in Collections:
KIST Publication > Conference Paper
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