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Superhydrophobic hierarchical structures produced through novel low-cost stamp fabrication and hot embossing of thermoplastic film

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Abstract

We present a simple and cost-effective method to produce superhydrophobic surfaces in thermoplastic polymer substrates, which contain hierarchical micro/nano structures that resemble lotus leaves. The method involved the fabrication of an Al stamp through the sequential application of laser ablation and anodization to create micro- and nano-structures, respectively. The fabricated patterns on the Al stamp were replicated on the thermoplastic Cyclic olefin copolymer (COC) film surfaces through a hot embossing technique. Static water contact angles were measured to evaluate the hydrophobicity of the patterned COC surfaces. The static water contact angle on the micro/ nano hierarchical structured COC surface was measured to be 162.3° on average. The hot embossing process was repeated 31 times with a nano-structured Al stamp, and the replicated COC surfaces showed consistent water contact angles.

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Authors and Affiliations

  1. Dept. of Advanced Convergence Technology, Graduate School, Korea Polytechnic University, Siheung, 429-793, Korea

    Chae-Hee Lim & Sol-Yi Han

  2. SNDENG Co., Ltd., Ansan, 425-852, Korea

    Jae-Dong Eo

  3. Dept. of Mechanical Design Engineering, Korea Polytechnic University, Siheung, 429-793, Korea

    Kwang Kim & Wook-Bae Kim

Authors
  1. Chae-Hee Lim
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  2. Sol-Yi Han
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  3. Jae-Dong Eo
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  4. Kwang Kim
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  5. Wook-Bae Kim
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Corresponding author

Correspondence to Wook-Bae Kim.

Additional information

Recommended by Guest Editor Sangho Park

Chae-Hee Lim received his B.S. in Mechanical Design Engineering from Korea Polytechnic University, Korea, in 2015. He was a formely graduate student at the Department of Advanced Convergence Technology. His research interests are in the area of design of functional devices based on micro/nanoreplication technologies.

Wook-Bae Kim received his Ph.D. in Mechanical Engineering from Yonsei University, Korea, in 2003. He then worked as Head Researcher at Samsung Electronics. He is currently an Associate Professor at the Department of Mechanical Design Engineering at Korea Polytechnic University in Siheung, Korea. His research interests include micro/nano-fabrication, plastic processing, and precision surface finishing.

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Lim, CH., Han, SY., Eo, JD. et al. Superhydrophobic hierarchical structures produced through novel low-cost stamp fabrication and hot embossing of thermoplastic film. J Mech Sci Technol 29, 5107–5111 (2015). https://doi.org/10.1007/s12206-015-1108-8

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  • DOI: https://doi.org/10.1007/s12206-015-1108-8

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