A preliminary study on the properties and fouling-release performance of siloxane-polyurethane coatings prepared from poly(dimethylsiloxane) (PDMS) macromers.
Siloxane-polyurethane fouling-release (FR) coatings based on aminopropyl terminated poly(dimethylsiloxane) (PDMS) macromers were prepared and characterized for FR performance via laboratory biological assays. These systems rely on self-stratification, resulting in a coating with a siloxane-rich surface and polyurethane bulk. Previously, these coating systems have used PDMS with multiple functional groups which react into the polyurethane bulk. Here, aminopropyl terminated PDMS macromers were prepared, where a single amine group anchors the PDMS in the coating. Coatings were prepared with four molecular weights (1000, 5000, 10,000, and 15,000 g mol⁻¹) and two levels of PDMS (5% and 10%). High water contact angles and low surface energies were observed for the coatings before and after water immersion, along with low pseudobarnacle removal forces. Laboratory bioassays showed reduced biofilm retention of marine bacteria, good removal of diatoms from coatings with low molecular weight PDMS, high removal of algal sporelings (young plants), and low removal forces of live barnacles.
Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota, USA.
Stacy
S
Sommer
Abdullah
A
Ekin
Dean C
DC
Webster
Shane J
SJ
Stafslien
Justin
J
Daniels
Lyndsi J
LJ
VanderWal
Stephanie E M
SE
Thompson
Maureen E
ME
Callow
James A
JA
Callow
D000818:Animals; D059001:Aquatic Organisms / Q000187:drug effects / Q000502:physiology; D001419:Bacteria / Q000187:drug effects / Q000254:growth & development; D001422:Bacterial Adhesion / Q000187:drug effects; D018441:Biofilms / Q000187:drug effects; D057219:Biofouling / Q000191:economics / Q000517:prevention & control*; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D017377:Diatoms / Q000187:drug effects / Q000502:physiology; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D004866:Equipment Contamination / Q000517:prevention & control; D008386:Marine Biology; D008422:Materials Testing; D012767:Ships; D001468:Thoracica / Q000187:drug effects / Q000502:physiology; D044445:Ulva / Q000187:drug effects / Q000502:physiology
D020099:Coated Materials, Biocompatible; D004129:Dimethylpolysiloxanes