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Proceedings Paper

Photochemical surface modification of polyurethane films with biomaterial by excimer laser processing
Author(s): Hiroyuki Niino; Joerg Krueger; Wolfgang Kautek
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Paper Abstract

The surface chemical modification of polyurethane (PU) films was performed by a UV laser-induced chemical reaction in a polysaccharide solution. This was undertaken with the possible application of hydrophilic packaging of implantable medical devices and in-vivo sensors. When a PU film in an aqueous alginic acid (AAC) solution was irradiated with the XeCl laser, it turned hydrophilic. Contact angles of water on the film were changed from 110 degree(s) to 60 degree(s). Since the absorption of AAC solution at 308 nm was negligibly small, the laser irradiation produced reactive sites solely on the PU surface, where AAC could be immobilized by chemical bonds. The mechanism for the modification was investigated by surface analyses with Fourier transform infrared spectroscopy and a photometric dye staining technique. This hydrophilic modification was interpreted as nanometer-scaled grafting of AAC induced by one-photon photochemical processes.

Paper Details

Date Published: 3 June 1998
PDF: 5 pages
Proc. SPIE 3274, Laser Applications in Microelectronic and Optoelectronic Manufacturing III, (3 June 1998); doi: 10.1117/12.309503
Show Author Affiliations
Hiroyuki Niino, Federal Institute for Materials Research and Testing (Japan)
Joerg Krueger, Federal Institute for Materials Research and Testing (Germany)
Wolfgang Kautek, Federal Institute for Materials Research and Testing (Germany)


Published in SPIE Proceedings Vol. 3274:
Laser Applications in Microelectronic and Optoelectronic Manufacturing III
Jan J. Dubowski; Peter E. Dyer, Editor(s)

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