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Superamphiphobic Coatings from Combination of a Biomimetic Catechol‐Bearing Fluoropolymer and Halloysite Nanotubes
Author(s) -
Ma Wei,
Higaki Yuji,
Takahara Atsushi
Publication year - 2017
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201700907
Subject(s) - materials science , halloysite , fluoropolymer , wetting , contact angle , surface energy , catechol , surface modification , composite material , chemical engineering , polymer , organic chemistry , chemistry , engineering
Superamphiphobic coatings with remarkable water and oil repellency are prepared by the combination of a biomimetic catechol‐bearing fluoropolymer, poly{2‐(perfluorooctyl)ethyl acrylate‐ co ‐ N ‐(3,4‐dihydroxyphenethyl) acrylamide} (P(FAC 8 ‐ co ‐DOPAm)), and naturally available halloysite nanotubes (HNTs). They are based on surface modification of HNTs with P(FAC 8 ‐ co ‐DOPAm). A procedure to attain stable affinity between silica and the copolymer is established, and used for surface modification of HNTs. Superamphiphobic coatings are obtained by casting the suspension of P(FAC 8 ‐ co ‐DOPAm)‐modified HNTs onto substrates. The superamphiphobic coatings exhibit Cassie–Baxter's wetting to liquids with a wide range of surface tension, because of the extremely low surface free energy and the unique micro‐/nanohierarchical surface topography, as well as the re‐entrant curvature of HNTs. These superamphiphobic coatings are environmentally and chemically durable, and can resist water scouring. The abundance of HNTs in nature and the easily controlled process of this method ensure an efficient approach for large‐scale production of superamphiphobic coatings for various applications.