Multistage textured superhydrophobic polytetrafluoroethylene surface prepared by fabric embossing and thermal annealing

• Published in: Materials letters Vol. 268; p. 127556
• Main Authors: Gu, Dapeng, Song, Kefeng, Chen, Suwen, Liu, Shouyao, Yang, Bingchao, Ma, Xiaoying, Wang, Zibo, Wang, Shuaibing
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.06.2020; Elsevier BV
• Subjects: Annealing; Embossing; Grooves; Hydrophobic surfaces; Hydrophobicity; Materials science; Multistage; Polytetrafluoroethylene; PTFE; Radioactivity; Superhydrophobic; Surfaces; Texture; Surfaces; Superhydrophobic; Multistage; Texture; PTFE
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2020.127556

•Multistage PTFE surface was obtained by Fabric embossing and thermal annealing.•Multistage textures include microscale ≈175 µm, ≈10 µm, ≈3 µm and nanoscale ≈380 nm.•Optimum thermal annealing temperatures to superhydrophobicity are 345 and 360 °C. A novel method combined with fabric embossing (embossing with fabric template) and thermal annealing is proposed to prepare multistage textured superhydrophobic polytetrafluoroethylene (PTFE) surface. Multistage (four-stage) textures of microscale Y-grooves (≈175 µm), F-grooves (≈10 µm), warts (≈3 µm), and nanoscale dendrites (≈380 nm) were obtained. The multistage textures endowed the PTFE surface with better superhydrophobicity, comparing with the two-stage textures with Y-grooves and F-grooves or the two-stage textures with warts and dendrites. Optimum superhydrophobicity is obtained at thermal annealing temperatures 345 °C and 360 °C.