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Effect Of Micro-Structural Geometry On Lubricant Infiltration And Property Of Slippery Liquid-Infused Porous Surfaces

Author

Listed:
  • MANTANA SUWAN

    (National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand)

  • NUCHJARIN SANGWONG

    (National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand)

  • NITHI ATTHI

    (��Thai Microelectronics Center (TMEC), National Electronics and Computer Technology Center (NECTEC), Chachoengsao 24000, Thailand)

  • PATTARALUCK PATTAMANG

    (��Thai Microelectronics Center (TMEC), National Electronics and Computer Technology Center (NECTEC), Chachoengsao 24000, Thailand)

  • WITSAROOT SRIPUMKHAI

    (��Thai Microelectronics Center (TMEC), National Electronics and Computer Technology Center (NECTEC), Chachoengsao 24000, Thailand)

  • SITTHISUNTORN SUPOTHINA

    (National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand)

Abstract

Liquid-infused porous surfaces inspired by Nepenthes pitcher plant were fabricated on polyurethane. Five different micro-structures, including pillar (PIL), Sharklet® (SHK), continuous discrete ridge (DIR), hole (HOL) and networking (NET), were fabricated by soft lithography. Effects of micro-structural geometry on lubricant infiltration capability were investigated by infiltration the micro-structures with two lubricants of different viscosity, Krytox-103 (η: 0.131 Pa⋅s) and Krytox-105 (η:0.737Pa⋅s). The lubricant infiltration and retention capability were determined using a confocal laser scanning micro-scopy, and properties of the infused surfaces were evaluated by measuring the speed of water droplet motion at various tilting angles. The results revealed that, for the 80μm-high micro-structures, infiltration with a less viscous Krytox-103 resulted in more complete infiltration and retention, particularly for the PIL micro-structure. The infused surface exhibited a slippery behavior signified by low sliding angle and good anti-adhesion against chlorophyll fluid and milk yogurt. The lubricant retention capability was significantly reduced for the 7μm-high micro-structures due to lower aspect ratio and low capillary force. In this case, the PIL infused with a more viscous Krytox-105 provided a slippery surface.

Suggested Citation

  • Mantana Suwan & Nuchjarin Sangwong & Nithi Atthi & Pattaraluck Pattamang & Witsaroot Sripumkhai & Sitthisuntorn Supothina, 2022. "Effect Of Micro-Structural Geometry On Lubricant Infiltration And Property Of Slippery Liquid-Infused Porous Surfaces," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 29(02), pages 1-12, February.
    • Handle: RePEc:wsi:srlxxx:v:29:y:2022:i:02:n:s0218625x22500196
    DOI: 10.1142/S0218625X22500196
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