Fabrication of Robust Waterborne Superamphiphobic Coatings with Antifouling, Heat Insulation, and Anticorrosion

Zeting Qiao; Guoyu Ren; Xiaodong Chen; Yanli Gao; Yun Tuo; Cuiying Lu

doi:10.1021/acsomega.2c06145

Fabrication of Robust Waterborne Superamphiphobic Coatings with Antifouling, Heat Insulation, and Anticorrosion

ACS Omega. 2022 Dec 20;8(1):804-818. doi: 10.1021/acsomega.2c06145. eCollection 2023 Jan 10.

Authors

Zeting Qiao¹, Guoyu Ren^{1

2}, Xiaodong Chen¹, Yanli Gao¹, Yun Tuo¹, Cuiying Lu^{1

2}

Affiliations

¹ School of Chemistry and Chemical Engineering, Yulin University, Yulin, Shaanxi 719000, P. R. China.
² Shaanxi Key Laboratory of Low Metamorpcoal Clean Utilizationhic, Yulin University, Yulin, Shaanxi 719000, P. R. China.

Abstract

Water-based superamphiphobic coatings that are environmentally friendly have attracted tremendous attention recently, but their performances are severely limited by dispersibility and mechanical durability. Herein, a dispersion of poly(tetrafluoroethylene)/SiO₂@cetyltrimethoxysilane&sodium silicate-modified aluminum tripolyphosphate (PTFE/SiO₂@CTMS&Na₂SiO₃-ATP) superamphiphobic coatings was formed by mechanical dispersion of poly(tetrafluoroethylene) emulsion (PTFE), modified silica emulsion (SiO₂@CTMS), sodium silicate (Na₂SiO₃), and modified aluminum tripolyphosphate (modified ATP). The four kinds of emulsions were mixed together to effectively solve the dispersity of waterborne superamphiphobic coatings. Robust waterborne superamphiphobic coatings were successfully obtained by one-step spraying and curing at 310 °C for 15 min, showing strong adhesive ability (grade 1 according to the GB/T9286), high hardness (6H), superior antifouling performance, excellent impact resistance, high-temperature resistance (<415 °C), anticorrosion (immersion of strong acid and alkali for 120 h), and heat insulation. Remarkably, the prepared coating surface showed superior wear resistance, which can undergo more than 140 abrasion cycles. Moreover, the composite coating with 35.53 wt % SiO₂@CTMS possesses superamphiphobic properties, with contact angles of 160 and 156° toward water and glycerol, respectively. The preparation method of superamphiphobic coatings may be expected to present a strategy for the preparation of multifunctional waterborne superamphiphobic coatings with excellent properties and a simple method.