NDLI: The effect of formulation variables on fouling-release performance of stratified siloxane

Content Provider	Springer Nature Link
Author	Bodkhe, Rajan B. Thompson, Stephanie E. M. Yehle, Carolyn Cilz, Nicholas Daniels, Justin Stafslien, Shane J. Callow, Maureen E. Callow, James A. Webster, Dean C.
Copyright Year	2011
Abstract	The effects of formulation variables, such as type of polyol, solvent type and solvent content, and coating application method, on the surface properties of siloxane–polyurethane fouling-release coatings were explored. Fouling-release coatings allow the easy removal of marine organisms from a ship’s hull via the application of a shear force to the surface. Self-stratified siloxane–polyurethane coatings are a new approach to a tough fouling-release coating system. Combinatorial High Throughput Experimentation was employed to formulate and characterize 24 different siloxane–polyurethane coatings applied using drawdown and drop-casting methods. The resulting coatings were tested for surface energy using contact angle measurements. The fouling-release performance of the coatings was tested using a number of diverse marine organisms including bacteria (Halomonas pacifica and Cytophaga lytica), sporelings (young plants) of the green macroalga (Ulva linza), diatom ((microalga) Navicula incerta), and barnacle (Amphibalanus amphitrite). The performance of the majority of the coatings was found to be better than the silicone standards, Intersleek$^{®}$ and Silastic$^{®}$ T2. An increase in solvent content in the formulations increased the surface roughness of the coatings. Coatings made with polycaprolactone polyol appeared to be somewhat rougher compared to coatings made with the acrylic polyol. The adhesion strength of sporelings of Ulva increased with an increase in solvent content and increase in surface roughness. The adhesion strengths of Ulva sporelings, C. lytica, and N. incerta were independent of application method (cast or drawdown) in contrast to H. pacifica adhesion, which was dependent on the application method.
Starting Page	235
Ending Page	249
Page Count	15
File Format	PDF
ISSN	15470091
Journal	JCT Research
Volume Number	9
Issue Number	3
e-ISSN	19353804
Language	English
Publisher	Springer US
Publisher Date	2011-09-13
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Marine coatings Fouling Siloxane Polyurethane Ulva Materials Science Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings Industrial Chemistry/Chemical Engineering Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Chemistry Surfaces, Coatings and Films Colloid and Surface Chemistry Surfaces and Interfaces

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