Fabrication of high wettability gradient on copper substrate

Ding Jun Huang, Tzong Shyng Leu

研究成果: Article同行評審

71 引文 斯高帕斯(Scopus)

摘要

Copper is one of the most widely used materials in condensation heat transfer. Recently there has been great interest in improving the condensation heat transfer efficiency through copper surface modification. In this study, we describe the fabrication processes of how copper surfaces were modified to be superhydrophilic (CA ≤ 10°) and superhydrophobic (CA > 150°) by means of H 2 O 2 immersion and fluorination with Teflon. The wettability gradient of copper surfaces with contact angles (CA) changing from superhydrophilic to superhydrophobic are also demonstrated. Unlike previous studies on gradient surfaces in which the wettability gradient is controlled either non-precisely or entirely uncontrolled, in this study, the contact angles along wettability gradient copper surfaces vary with a precisely designed gradient. It is demonstrated that a high wettability gradient copper surface can be successfully fabricated using photolithography to define the area ratios between superhydrophilic and superhydrophobic patterns within a short distance. The fabricated wettability gradient of copper surfaces is expected to be able to enhance the condensation heat transfer efficiency.

原文English
頁(從 - 到)25-32
頁數8
期刊Applied Surface Science
280
DOIs
出版狀態Published - 2013 9月 1

All Science Journal Classification (ASJC) codes

  • 一般化學
  • 凝聚態物理學
  • 一般物理與天文學
  • 表面和介面
  • 表面、塗料和薄膜

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