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Wettability Control of VACNT Array through Atmospheric Plasma Treatment

[+] Author and Article Information
Yulong Ji

Marine engineering college, Dalian Maritime University, Dalian 116026, China
Key Laboratory of Marine, Mechanical & Manufacturing Engineering of the Ministry of Transport, Dalian 116026, China
jiyulongcn@163.com

Gen Li

Marine engineering college, Dalian Maritime University, Dalian 116026, China
Key Laboratory of Marine, Mechanical & Manufacturing Engineering of the Ministry of Transport, Dalian 116026, China
ligen_dlmu@163.com

Yuqing Sun

Marine engineering college, Dalian Maritime University, Dalian 116026, China
sunyq@dlmu.edu.cn

Hongbin Ma

Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO, USA
mah@missouri.edu

Corresponding author.

J. Heat Transfer 137(2), 020903 (Feb 01, 2015) Paper No: HT-14-1624; doi: 10.1115/1.4029013 History: Received September 18, 2014; Revised September 18, 2014; Online November 25, 2014

Abstract

Wetting characteristics of the vertically aligned carbon nanotube (VACNT) array surface can be modified by atmospheric plasma treatment with masks. The plasma treatment of the VACNT array surface was performed by moving an atmospheric pressure plasma jet system (Plasmatreat GmbH, Steinhagen) at a fixed speed of 0.167 m/s through a mask with holes. The hole diameter is fixed equal to 250 µm. The distance between holes varies between 0.5 mm to 3.0 mm.The Easy Drop Shape Analyzer (KRUSS GmbH) was used for contact angle measurement. Experimental results show that the wetting characteristics of the VACNT array surface can be modified from a contact angle of 140° to 0° depending on the distance between holes.

Copyright © 2014 by ASME
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