Nanotech 2013 Vol. 2
Nanotech 2013 Vol. 2
Nanotechnology 2013: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational (Volume 2)

Micro & Nano Fluidics Chapter 5

Coating Resistance to Biofouling Inception for Freshwater Vehicles

Authors: P. Malm, G. Krishnan, R. Loth, A. Steele, I. Bayer

Affilation: University of Virginia, United States

Pages: 350 - 353

Keywords: biofluidics, biofouling, coatings, hydrophobicity, turbulent flow, laminar flow

Preventing biofouling in natural bodies of freshwater is important for a wide variety of applications. The relationship between surface properties and antifouling has been the subject of many recent studies, with primary focus on long-term exposure across weeks and months. The current study focuses on short-term exposure and the inception of biofouling, with specific focus on the extension of laminar flow across low-speed freshwater vehicles as a mechanism to reduce drag. Adhered particles cause earlier transition to turbulence with a larger operative surface roughness than a respectively clean coating; eliminating adherence prevents turbulent wake regions from forming behind particles and provides an extension of effective laminar flow. The current study’s novelty is the focus on short-term biofouling elements, as opposed to matured biofilms and long-term macrofouling Polytetrafluoroethylene (Teflon) was chosen for comparison to traditional polyurethane coatings for its hydrophobic properties based on static contact angle. Digital microscopy followed a dynamic freshwater environment to determine if bioparticles adhered with sufficient height (5μm) to cause turbulent trips.

ISBN: 978-1-4822-0584-8
Pages: 808
Hardcopy: $209.95