Lyophobic slippery surfaces on smooth/hierarchical structured substrates and investigations of their dynamic liquid repellency. Issue 28 (5th July 2019)

• Record Type: Journal Article
• Authors: Wang, Nan; Tang, Lingling; Cai, Yingfeng; Xiong, Dangsheng
• Is Part Of: Physical chemistry chemical physics. Volume 21:Issue 28(2019)
• Page Start: 15705
• Page End: 15711
• Publication Date: 2019-07-05
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c9cp02132a
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : First principle of preparing slippery lyophobicity was the low surface-free energy, and the dynamic wettability was related to the kinematic viscosity. Abstract : Slippery surfaces were prepared by infusing lubricant into smooth or hierarchical-structured superhydrophobic surfaces (SHS) to compare different surface-free energies. The surfaces obtained showed good repellency towards liquids with various values of surface tension/molecular polarity/viscosity, including hexane, tetradecane, water, ethylene glycol and viscous engine oil. The lyophobicity could be realized on a relatively smooth surface, indicating that the first principle of preparing a lyophobic slippery surface is to perform a low surface-free energy modification. The dynamic liquid repellency was also studied: the sliding speeds of different liquids on lubricant infused SHS showed a negative correlation to their kinematic viscosity values, and a higher surface roughness was favorable for dynamic wettability, whereas for the smooth slippery surface, the travelling speeds showed randomness.