Superamphiphobic and Electroactive Nanocomposite toward Self-Cleaning, Antiwear, and Anticorrosion Coatings

Abstract

Multifunctional coatings are in urgent demand in emerging fields. In this work, nanocomposite coatings with extraordinary self-cleaning, antiwear, and anticorrosion properties were prepared on aluminum substrate by a facile spraying technique. Core-shell structured polyaniline/functionalized carbon nanotubes (PANI/fCNTs) composite and nanosized silica were synergistically integrated into ethylene tetrafluoroethylene (ETFE) matrix to construct lotus-leaf-like structures, and 1H,1H,2H,2H- perfluorooctyltriethoxysilane (POTS) was used to decrease the surface energy. The composite coating with 6 wt % PANI/fCNTs possesses superamphiphobic property, with contact angles of 167°, 163°, and 159° toward water, glycerol, and ethylene glycol, respectively. This coating demonstrates stable nonwetting performance over a wide temperature range (<400 °C), as well as outstanding self-cleaning ability to prevent contamination by sludge, concentrated H2SO4, and ethylene glycol. Superamphiphobic surface property could be maintained even after 45 000 times abrasion or bending test for 30 times. The coating displayed strong adhesive ability (grade 1 according to the GB/T9286) on the etched aluminum plate. The superamphiphobic surface could be retained after immersion in 1 mol/L HCl and 3.5 wt % NaCl solutions for 60 and 90 d, respectively. It should be noted that this coating reveals significantly improved anticorrosion performance as compared to the bare ETFE coating and ETFE composite coating without PANI/fCNTs. Such coatings with integrated functionalities offer promising self-cleaning and anticorrosion applications under erosive/abrasive environment.

Development of poly(vinylcarbazole)/alumina nanocomposite coatings for corrosion protection of 316L stainless steel in 3.5% NaCl medium

“…The standard tape adhesion test (ASTM D 3359) was used to evaluate the adhesion strength between the interface of PVK, PVK‐Al 2 O 3 coatings and the substrate . The results are generally classified as follows: 0B (65%), 1B (35–65%), 2B (15–35%), 3B (5–15%), 4B (0–5%), and 5B (0% or none).…”

Bioinspired Surfaces with Superamphiphobic Properties: Concepts, Synthesis, and Applications

“…Considering many practical applications, such as clothing, kitchenware, oil pipeline, and so on, antifouling property is of great significance in a wide range of areas . Yuan et al have prepared the superamphiphobic coating with composite ethylene tetrafluoroethylene‐polyaniline functionalized carbon nanotubes. Such a liquid‐repellent surface was able to keep the surface uncontaminated even after immersion test for 100 cycles in the sludge, while the blank aluminum plate was seriously covered with dirt after the first immersion.…”

“…Nonwetting tests with sludge c1,c2), mixture of H 2 O and ethylene glycol (EG) d), and concentrated H 2 SO 4 e). a–e) Reproduced with permission . Copyright 2016, American Chemical Society.…”

Nanocomposite Coatings: Preparation, Characterization, Properties, and Applications

“…For organic matrix, called polymer-based nanocomposite, the most used polymers for preparation of nanocomposite coating can be listed as follows: epoxy [2][3][4][5][6][7], polyurethane [8,9], Chitosan [10,11], polyethylene glycol (PEG) [12][13][14][15], polyvinylidene fluoride (PVDF) [16], PANi [17][18][19], PPy [20][21][22][23], polystyrene [24], polyamic acid and polyimide [25], rubber-modified polybenzoxazine (PBZ) [26], polymers containing reactive trimethoxysilyl (TMOS) [27], pullulan [28], fluoroacrylic polymer [29,30], ethylene tetrafluoroethylene (ETFE) [31], polyacrylate [3], poly(N-vinyl carbazole) [32], polycarbonate [33], fluorinated polysiloxane [34], polyester [35], polyacrylic [36], polyvinyl alcohol (PVA) [37], polydimethylsiloxane [38], polyamide [39], and UV-curable polymers [40].…”

“…For organic nanoparticles (organic nanofiller), the most used nanoparticles were PTFE [80][81][82], PEO [83], PANi [31], or nanocellulose and cellulose nanocrystal [18,40].…”