Superhydrophobic coating based on silica derived from bagasse modified with vinyltriethoxysilane and copper (Cu) as antibacterial agent

Abstract

Prevention of material degradation can be achieved through the coating. Surface coating is an economically advantageous method in producing desired characteristics and auxiliary aesthetics of surface material. Modern coating processes usually use nanomaterial technology made from silica. Silica can be taken from various sources, such as bagasse waste. Bagasse has high silica content up to 88%. Coating material from silica has good adhesion, good protective properties that allow it to withstand the diffusion of water vapor, ions, and oxygen to metal surfaces. Modified silica can be used to produce superhydrophobic surfaces. The addition of vinyl groups to silica can improve the elastic and mechanical properties without much variation in density or thermal conductivity. The addition of vinyltriethoxysilane can create uniform distribution of nanoparticles. Modification of silica can be done to procure anti-bacterial properties. Copper (Cu) is often used as a high activity anti-bacterial with a fairly affordable cost. With the supplementary anti-bacterial properties, material damages attributed to bacteria may be prevented or reduced. This review aims to provide an overview of the production of superhydrophobic coatings using different methods, analyze the characteristics of synthesized materials, and choose suitable methods for producing superhydrophobic coatings. This review proposes the fabrication of silica superhydrophobic coating with the sol-gel method modified through the addition of vinyl and Cu as an anti-bacterial. This recommendation is based on the literature study that has been carried out.