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论文类型：期刊论文

发表时间：2018-12-01

发表刊物：CHINESE JOURNAL OF MECHANICAL ENGINEERING

收录刊物：SCIE

卷号：31

期号：1

ISSN号：1000-9345

关键字：Superhydrophobicity; Aluminum substrates; Mask electrochemical machining; Micro post arrays

摘要：Surfaces with controllable micro structures are significant in fundamental development of superhydrophobicity. However, preparation of superhydrophobic surfaces with array structures on metal substrates is not effective using existing methods. A new method was presented to fabricate super-hydrophobic post arrays on aluminum (Al) substrates using mask electrochemical machining and fluoridation. Electrochemical etching was first applied on Al plates with pre-prepared photoresist arrays to make the post array structures. Surface modification was subsequently applied to reduce the surface energy, followed by interaction with water to realize superhydrophobicity. Simulation and experimental verification were conducted to investigate how machining parameters affect the array structures. Analysis of the water contact angle was implemented to explore the relationship between wettability and micro structures. The results indicate that superhydrophobic surfaces with controllable post structures can be fabricated through this proposed method, producing surfaces with high water static contact angles.