Antialgal Assesment of Anionic Hydrogel Coated Surface Treatment for Reducing Biofouling on Water Immersed Materials

摘要

Surface engineering using anionic hydrogel coating induced by Fenton reagent and microwave plasma treatment have been succesfuly coated onto PP surfaces. The stability of modified surface evaluated by immersion in seawater and freshwater. The sulfonate and carboxyl functional groups were reduced yet still observed under FTIR evaluation. The antialgal properties of modified surface then assesed by immersion in solution of four species of microalgae differs in shapes, size and surface charges, i.e.: Spirulina sp., Isocrysis sp., Nitzchia sp. and Tetraselmis sp. The results showed that surface coating of PP by using poly-SPMA anionic hydrogels would reduce the adhesion of microalgae cells onto modified surface, yet the adhesion was affected by size, shape and zeta potential of microalage. Small size, spherical and lower negative surface charge of microalgae adhered more in the surface compared with the larger, filament shape and higher negative surface charge of microalgae. It is concluded, modifying any surfaces regularly fouled by bacteria or algae when contact or immerse in water, especially using anionic hydrogels might improved the surface antialgal and antibacterial properties. This would be beneficial to reduce operational loss in many application in water systems including membrane processes, water treatments equipments or other materials and appliances.