Abstract
Poly(oligo(ethylene glycol) methacrylate) (pOEGMA) brushes were grafted via surface-initiated atom transfer radical polymerization (SI-ATRP) from a poly(styrene-co-vinylbenzyl chloride) macroinitiator. While bromoisobutyryl initiator groups are most commonly used for this purpose, benzyl chloride initiators may be advantageous for some applications due to superior stability. Water-only graft solutions produced thicker brush coatings with superior low fouling properties (low protein adsorption and cell adhesion) versus mixed water/alcohol solutions. Coatings produced using 475 Da OEGMA (methyl ether terminated) further reduced non-specific interactions compared to 360 Da OEGMA (hydroxyl terminated). Initiator density had minimal effect on low fouling properties.
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