Sprayable Superhydrophobic Polydopamine-Modified Oleic Acid/Nanoscale SiO₂Composites for Insulator Protective Coatings

Abstract

Failures of porcelain insulators due to ice formation, corrosive pollutant deposition, and cracks result in significant power losses in the power transmission system. Using a simple three-step sprayable coating technique, we propose a novel superhydrophobic material for high-voltage insulator surface protection with water absorption resistance, self-cleaning, icephobic, and crack healing capabilities. An adhesive polydopamine layer sprayed on an insulator surface to predevelop a macro−nano hierarchical surface based on an oleic acid/nano-SiO 2 composite with an oleic acid infusion arrangement is a crucial endurance technique. The technique shows less than 3% water absorbance, more than 150°contact angle, less than 2°contact angle hysteresis, self-cleaning ability, ice-phobic with a minimum ice adhesion strength of 15.5 ± 9.9 kPa, and crack-healing characteristics after corrosive, thermal, and mechanical aging. Such sustainable, long-lasting, and facile techniques would find widespread applications in the power, civil, marine, and aviation industries.

Effects of Nanoadditives on the Anticorrosion Performance of Nanocomposite Coatings: A Review

“…(1) complexity of preparation technology: Some composite additives with multiple functions require complex processes and controls, such as the preparation of microcapsules and the stable release of corrosion inhibitors, which require precise control of the process. Developing simpler and more efficient preparation methods for nanocomposite coatings can promote the industrialization process of nanocomposite anticorrosion coatings. , (2) Higher preparation costs. Some effective nanoadditives are expensive.…”

“…Developing simpler and more efficient preparation methods for nanocomposite coatings can promote the industrialization process of nanocomposite anticorrosion coatings. 196,197 (2) Higher preparation costs. Some effective nanoadditives are expensive.…”

Unveiling the Future of Insulator Coatings: Unmatched Corrosion Resistance and Self-Healing Properties of PFPE Lubricating Oil-Infused Hydrophobized CeO2 Surfaces

“…Tafe curves were measured during Gamry-made electrochemical workstation tests by sweep ing the voltage from −0.6 to 0.6 V versus the open circuit potential at 1 mV/s. The open circuit voltage was maintained at equilibrium, while the frequency was changed between 0.01-100,000 Hz to determine the electrochemical impedance spectroscopy [17][18][19]. The slippery lubricant-infused porous coating offers corrosion resistance and a nonstick surface to various materials.…”

“…Any excess PFPE lubricating oil was removed during the process. As a result, a PFPE-infused hydrophobized CeO 2 composite was successfully developed on the insulator surface [16,17]. The thickness of the coating can be observed in the micrographs shown in Figure S1 and Table S2.…”

Superhydrophobic TiN-Coated Cotton Fabrics with Nanoscale Roughness and Photothermal Self-Healing Properties for Effective Oil–Water Separation

“…Superhydrophobic materials are widely used in de-icing, , anti-corrosion, , self-cleaning, , and oil–water separation , due to their water-repellent properties. It is generally believed that water repellency is provided by the nanorough structure and low surface free energy of the interface. , Nanorough structures are usually provided by nanoinorganic particles, and low surface energy layers are provided by low surface energy polymers. Tang and Liu used hydroxyl-terminated polydimethylsiloxane (HPDMS) to provide low surface energy, and HPDMS has a stronger interaction with cotton fabrics .…”