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Title: Plasma treatments of wool fiber surface for microfluidic applications

Highlights: • We used atmospheric plasma for tuning the wettability of wool fibers. • The wicking rates of the wool fibers increased with increasing treatment time. • The increasing of wettability results in removement of fatty acid on the wool surface. - Abstract: Recent progress in health diagnostics has led to the development of simple and inexpensive systems. Thread-based microfluidic devices allow for portable and inexpensive field-based technologies enabling medical diagnostics, environmental monitoring, and food safety analysis. However, controlling the flow rate of wool thread, which is a very important part of thread-based microfluidic devices, is quite difficult. For this reason, we focused on thread-based microfluidics in the study. We developed a method of changing the wettability of hydrophobic thread, including wool thread. Thus, using natural wool thread as a channel, we demonstrate herein that the manipulation of the liquid flow, such as micro selecting and micro mixing, can be achieved by applying plasma treatment to wool thread. In addition to enabling the flow control of the treated wool channels consisting of all natural substances, this procedure will also be beneficial for biological sensing devices. We found that wools treated with various gases have different flow rates. We used anmore » atmospheric plasma with O{sub 2}, N{sub 2} and Ar gases.« less
Authors:
; ;  [1] ;  [1] ;  [2]
  1. Department of Chemistry, Sungkyunkwan University, 440-746 Suwon (Korea, Republic of)
  2. Institute of Basic Science, Sungkyunkwan University, 440-746 Suwon (Korea, Republic of)
Publication Date:
OSTI Identifier:
22475871
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 69; Conference: ISFM 2014: 6. international symposium on functional materials, Singapore (Singapore), 4-7 Aug 2014; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; ARGON; CARBOXYLIC ACIDS; ELECTRON MICROSCOPY; FIBERS; INFRARED SPECTRA; LIQUID FLOW; MICROSTRUCTURE; NITROGEN; OXYGEN; PLASMA; SURFACE PROPERTIES; SURFACES; WETTABILITY; WOOL