Thermoregeneration of Fouling-Inhibiting Plastrons on Conductive Laser-Induced Graphene Coatings by Joule Heating

Manderfeld, E and Nunes Kleinberg, M and Thamaraiselvan, C and Arnusch, CJ and Rosenhahn, A (2022) Thermoregeneration of Fouling-Inhibiting Plastrons on Conductive Laser-Induced Graphene Coatings by Joule Heating. In: Advanced Materials Interfaces .

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Abstract

Superhydrophobic surfaces are capable to resist the adhesion of organisms through a surface bound air layer, known as a plastron. However, the lifetime of such plastrons is limited and their decay results in the loss of the protective barrier against organism attachment. Here a method is established to replenish the plastron by Joule heating of electrically conductive, superhydrophobic laser-induced graphene (SLIG) coatings. Local heating with a DC current reduces the water solubility of gases and the growth of an initial microplastron into a macroplastron through gas nucleation at the liquid–air interface is observed. Small temperature differences between the surface and the surrounding water could induce this effect. Different SLIG surfaces are challenged against biofouling by the diatom Navicula perminuta under dynamic conditions and it is shown that surfaces with intact plastron resist diatom accumulation. Surfaces without the protective air layer are found to accumulate high amounts of diatoms. The results underline the promising potential of plastron-based antifouling approaches because plastrons can be stabilized for extended times. This strategy could be applied to many other materials for an effective protection against fouling organism.

Item Type:	Journal Article
Publication:	Advanced Materials Interfaces
Publisher:	John Wiley and Sons Inc
Additional Information:	The copyright for this article belongs to John Wiley and Sons Inc.
Keywords:	Biology; Coatings; Heating; Joule heating; Phase interfaces, Air layers; Anti-foulings; Graphene coatings; Joules heating; Laser induced; Laser-induced graphene; Plastron replenishment; Super-hydrophobic surfaces; Superhydrophobic; Surface bounds, Graphene
Department/Centre:	Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research
Date Deposited:	04 Nov 2022 09:53
Last Modified:	04 Nov 2022 09:53
URI:	https://eprints.iisc.ac.in/id/eprint/77780

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