![]() ![]() ![]() Because of its inexpensive cost and superior mechanical properties, carbon steel is the construction material that is most frequently utilized in numerous industries. Due to its simplicity, low-temperature procedure, clean, affordable, and adjustable nanostructure, electrodeposition is a great method for designing artificial SHP surfaces 3. Several techniques have been presented for the development of SHP coatings, including electrodeposition, electrochemical anodic oxidation, anodization, etc. SHP surfaces have a broad array of uses, including corrosion resistance, UV resistance, oil–water separation technologies, etc. As a result, it's essential to develop low-cost, environmentally friendly procedures and materials for producing SHP surfaces 5, 10. ![]() So, it can be challenging to design a SHP surface with these characteristics, particularly when there are concerns about environmental safety. However, it has been demonstrated that employing such long-chained fluorocarbons has very harmful side effects, including persistence, biomagnification, and bioaccumulation 5, 6, 7, 8, 9. Perfluorinated compounds, such as fluoro silanes or fluorocarbon molecules, have historically been used as low surface energy materials due to their exceptionally low surface energy 4, 5. Low surface energy rough surfaces are typically SHP, whereas high surface energy rough surfaces are typically superhydrophilic 4. It is common knowledge that surface-wetting behaviour is determined by the combination of rough surfaces and various surface energies. Due to the significance of SHP surfaces in both fundamental research and practical applications, they have received a lot of attention. SHP surfaces are exceptionally water-repellent surfaces with a water contact angle, WCA, of more than 150° and a water sliding angle, WSA, of lower than 10° 2, 3. Wide-ranging industrial applications are anticipated for several synthetic superhydrophobic, SHP, surfaces that were inspired by lotus leaves 1. These results highlight the superior performance of the coating and its potential as a highly effective and durable superhydrophobic coating for steel substrates. Additionally, the coating demonstrated improved corrosion resistance, UV resistance, mechanical abrasion resistance, and chemical stability compared to the coating. ![]() Quantitative estimation of the scale inhibition efficiency revealed that the coating exhibited greater efficiency compared to the coating. The water contact angles for and coatings were 161° and 165°, respectively, while the values of water sliding angles for both coatings were 3.0° and 1.0°, respectively. Atomic force microscopy results showed that the coat had higher roughness than resulting in higher superhydrophobicity. Scanning electron microscopy revealed that the superhydrophobic coatings have nanoscale features. Fourier transform infrared spectroscopy showed that the stearic acid-grafted coating, and the stearic acid-grafted composite, were well grafted on the steel surface. We constructed two superhydrophobic coatings on steel substrates using potentiostatic electrodeposition of nickel-modified biochar, and nickel modified by cobalt-biochar nanocomposite, then, these coatings were soaked in an ethanolic stearic acid solution. In this study, we report an eco-friendly and facile process for the synthesis of biochar, BC, and a cobalt-biochar nanocomposite, Co-BC, using rice straw biomass. ![]()
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