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Heat‐resistant superamphiphobic robust surface by self‐assembled monolayer surface reaction
Author(s) -
Liu Taolin,
Kong Fanxin,
Mao Wentao,
Kong Qinggang,
Kong Fanzhen,
Qian Haiyan
Publication year - 2021
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6939
Subject(s) - materials science , monolayer , scanning electron microscope , surface tension , surface energy , chemical engineering , substrate (aquarium) , contact angle , surface modification , composite material , x ray photoelectron spectroscopy , polymer chemistry , nanotechnology , oceanography , physics , quantum mechanics , geology , engineering
Superamphiphobic surfaces have been arousing great attention in recent years for improved durability in practical applications. In this study, composites of dual‐sized porous silicas of micro‐/nanoparticles and silicic acid binder were coated on the glassy substrate as the micro‐/nano‐structure, then 60 nm porous silica particles modified by 3‐aminopropyltriethoxysilane (APTS) were coated. With the aid of the efficient, rapid, and stoichiometric reaction of amino group and epoxy group, the monolayer low‐surface‐energy long perfluorinated chains self‐assembled in the surface. Field emission scanning electron microscope (FESEM) and atomic force microscopy (AFM) verified the concave–convex surface topological features. This surface realized super‐repellency to liquids (surface tension ranging from 72.0 to 27.2 mN/m). This surface sustains superamphiphobicity after 15 times of the tape tearing test. After soaking in base (pH = 14), acid (pH = 1), and n ‐heptane for 20 days, this surface still holds superamphiphobicity. Its heat‐resistant ability is so outstanding that it keeps superamphiphobicity after drying for 3 h at 250°C.