Bio-compatible Polymer Coatings Using Low
Temperature, Atmospheric Pressure Plasma
Author(s)
S. Farhat, M. Gilliam, A. Zand & M. Rabago-Smith
Abstract
Current research has been dedicated to investigating the viability of atmospheric
pressure plasmas for use in coating technology. In addition to being more cost
effective and efficient, atmospheric pressure plasma offers a more streamlined
process, as it can be employed directly into the production line. Atmospheric
pressure plasma has been used in applications including biocompatibility,
hydrophilicity/hydrophobicity, and coating with antibacterial films.
Polyethylene is used as a biocompatible surface for ball and socket joint
replacements, which are under constant wear. Atmospheric pressure plasma
treatment was used to change the surface chemistry by grafting various
biocompatible polymers to the polyethylene surface, as methods of
providing wear resistance as well as providing a self-lubricating surface. The
organic coatings included biocompatible polymers, such as poly(2-
hydroxyethylmethacrylate), polyethylenimine, and polyethylene glycol. Low
temperature, atmospheric pressure plasma was used, along with an in-house
constructed spray delivery system, to coat high density polyethylene substrates.
Coatings were characterized with Fourier transform infrared spectroscopy
(FTIR), contact angle analysis, and adhesion testing. A significant decrease in
contact angle was noted for various coatings produced with this method,
indicating an increased wettability. Plasma processing conditions, specifically
the pretreatment of the substrate and the input power, greatly affected the
adhesion and uniformity of the polymerized layer.
Keywords: atmospheric pressure plasma, coatings, hydrophilicity.
Keywords
atmospheric pressure plasma, coatings, hydrophilicity.
Related Book
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