UV-Enhanced Bioactivity of PS/TiO2 Coating Prepared by Layer-by-Layer Self-Assembly Method

Abstract:

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The TiO2 nanopowder was prepared with TiOSO4 as raw material at low temperature by hydrolysis method, and microspheres coated polyethylene and TiO2 were then fabricated on titanium by layer-by-layer self-assembly technology. Using ultraviolet irradiation of titanium coating in distilled water for some time, titanium with enhanced bioactivity was achieved when immersed in simulated body fluid (SBF). The morphology, size and crystal shape before and after ultraviolet irradiation were characterized by scanning electron microcopy (SEM) and X-ray diffraction (XRD). UV irradiation of titanium results in the conversion of Ti4+ to Ti3+ and the generation of oxygen vacancies, which could react with the absorbed water to form basic Ti–OH groups. Compared with the coating non-UV irradiation, the UV-irradiated coatings do not present any obvious differences in morphology, surface roughness, grain size and phase component; however, they have more abundant basic Ti–OH groups thus the water contact angle decreases greatly so the surface become much more hydrophilic.

Info:

Periodical:

Key Engineering Materials (Volumes 434-435)

Edited by:

Wei Pan and Jianghong Gong

Pages:

579-581

DOI:

10.4028/www.scientific.net/KEM.434-435.579

Citation:

Z. X. Zhang et al., "UV-Enhanced Bioactivity of PS/TiO2 Coating Prepared by Layer-by-Layer Self-Assembly Method", Key Engineering Materials, Vols. 434-435, pp. 579-581, 2010

Online since:

March 2010

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Price:

$35.00

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