Effect of Artificial Electric Field Surface by Wave-Driven Triboelectricity on Anti-Bioadhesion for Riser Protection

Biofouling has been a persistent problem in marine riser system, resulting in energy waste and equipment damage. In this study, a kind of water wave-driven contact-mode flexible triboelectric nanogeneration has been prepared by using graphene-doped PDMS as dielectric friction material. When the graphene content is 2%, the average output voltage can reach 46 V under the contact frequency 10 Hz. The flexible triboelectric nanogeneration encapsulation module is impinged by water waves to generate alternating microelectric field on the riser surface and destroy the adhesion conditions of microorganisms during the biofilm stage. In the biofouling experiments at different stages, the biofouling area of the platymonas subcordiformis has been reduced by 53%, 62% and 61%. It provides a new idea for effective treatment of biofouling of mussels, oysters and barnacles attached to risers.