Photochemical surface modification of polyurethane films with biomaterial by excimer laser processing

Hiroyuki Niino; Joerg Krueger; Wolfgang Kautek

doi:10.1117/12.309503

3 June 1998 Photochemical surface modification of polyurethane films with biomaterial by excimer laser processing

Hiroyuki Niino, Joerg Krueger, Wolfgang Kautek

Proceedings Volume 3274, Laser Applications in Microelectronic and Optoelectronic Manufacturing III; (1998) https://doi.org/10.1117/12.309503
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

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.

Citation Download Citation

Hiroyuki Niino, Joerg Krueger, and Wolfgang Kautek "Photochemical surface modification of polyurethane films with biomaterial by excimer laser processing", Proc. SPIE 3274, Laser Applications in Microelectronic and Optoelectronic Manufacturing III, (3 June 1998); https://doi.org/10.1117/12.309503

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