The Effect of Acid, Salt and Base Immersion on Hydrophobic Properties of SiMn/PS Nanocomposite

Abstract

Abstract The manufacture of hydrophobic coatings that have self-cleaning properties has become a research trend now, but when applied, the coating is still easily damaged due to contact with other objects and is not durable due to corrosion. This problem will certainly hinder the application of hydrophobic surfaces in industry. For this reason, the researchers mixed substrates that had anti-corrosion properties such as silica and hard and strong properties such as manganese to be able to solve the previous problem, and the method used is spin coating. The precursors were made by adding 0.5 grams of polystyrene, 0.2 grams of silica nanoparticles and 0.2 grams of manganese nanoparticles. The coating was done by using the spin coating method and the calcination temperature was 60°C using an oven for 1 hour. The research results indicate that during immersion in an acid solution (pH 6), a salt solution (pH 7) and an alkaline solution (pH 11) as well as before immersion, there is a decrease in crystal size. For the best contact angle results obtained after immersion in acid is 97.28° with salt and base is 91.65° and 95.21° and before immersion is 104.70°.