A Waterborne Coating System for Preparing Robust, Self‐healing, Superamphiphobic Surfaces

Abstract

Existing coating systems for preparing superamphiphobic surfaces are predominantly confined into small-scale uses due to the heavy use of organic solvents. Waterborne coating treatment is highly desirable for the high safety, low cost, and non-environmental impact, but remains difficult to develop due to the problems in forming durable, homogeneous coating from an aqueous dispersion of amphiphobic substances. In this study, we have proved that lyophobic nanoparticles, fluorinated alkyl silane (FAS), and fluorocarbon surfactant can form a stable dispersion in water, suitable for preparing durable superamphiphobic surfaces on various solid This article is protected by copyright. All rights reserved. 2 substrates. A series of substrates including fabrics, sponge, wood, glass, and metal, after being coated with this ternary coating system show superamphiphobicity with low contact angle hysteresis. The coating is durable enough against physical abrasion, repeated washing, boiling in water, and strong acid/base attacks. Benefiting from FAS, the coating also has a self-healing ability against both physical and chemical damages. The unexpected stability of the ternary dispersion is a result of the synergistic interaction of the three ingredients. Results from this study may promote the wide development of safe, and cost-efficient superamphiphobic techniques for diverse applications.Received: ((will be filled in by the editorial staff))Revised: ((will be filled in by the editorial staff)) Published online: ((will be filled in by the editorial staff))

Facile Design and Fabrication of Superwetting Surfaces with Excellent Wear-Resistance

“…Self-repair with the aid of external stimuluses allows periodically renewable non-wettability even if repeated wear occurs on topography, but suffers from low regeneration rates or laborious procedures. 27,29,35,[57][58][59][60] Wear-induced wettability regeneration as previously described is available to the superhydrophilic surfaces, but it has been little resultful for the renovation of superhydrophobic surfaces, on which more rigid patterns are required for the water/gas/solid three-phase system. Some studies reveal that superimposed roughness can be renewed through wear without degeneration of superhydrophobicity, nevertheless not accessible at significant wear.…”

“…For superhydrophilic surfaces, compression/tensile measurements, 18,19 approach force, 18 nanoindentation, 20 sand grain impact, 19,20 finger wipe, 19 tape peeling 19 and linear abrasion 21 were adopted in a few literatures. More methods in tribology have been concerned and introduced into the durability assessment of superhydrophobic surfaces, including tangential abrasion, [22][23][24][25][26][27][28][29] blade/knife scratching, 22,24,25,[27][28][29] pencil hardness tests, 30,31 finger wiping, 22,24,25 sand grain impact, 30,32 water jet tests, 33,34 laundering tests, 29,35 etc. The linear abrasion test is always recommended as the most principal means for evaluating the mechanical durability of superhydrophobic surfaces against wear.…”

Flourishing Self‐Healing Surface Materials: Recent Progresses and Challenges

“…Recently, Lin and co‐workers designed a superamphiphobic coating on the surface of fabric based on lyophobic nanoparticles, and the presence of fluoroalkyl silane (FAS) in coating and fluorocarbon in surfactant, it endowed the fiber with self‐healing function. In short, combining the superwettability with self‐healing function promotes the development of fabric, and have broad applications in the public's everyday life …”

Direct Assembly of Silica Nanospheres on Halloysite Nanotubes for “Green” Ultrahydrophobic Cotton Fabrics

“…The fatty acid treatment on fabrics without any particles results in hydrophobic surface with a WCA of 127° compared Adv. [44] The WCA increases from 127° to 143° by grafting just 0.1% Si-HNT particles and fatty acid on the fabric. 2019, 3,1900009 www.advsustainsys.com to almost zero for the control cotton fabric, which readily absorbs the water drop making it difficult to measure the WCA.…”