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Preparation of nanocrystalline porous titania films on titanium substrates by a sol–gel method with polyethylene glycol as a template |
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| Authors: | Shaojing Bu Chunxiang Cui Xiaoxin Liu Ling Bai |
| Affiliation: | (1) School of Materials Science and Engineering, Hebei University of Technology, Dingzigu, Road No. 1, Hongqiao District, Tianjin, 300130, P.R. China;(2) Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials, Tianjin University, Tianjin, 300072, P.R. China |
| Abstract: | Porous nanocrystalline TiO2 films have been prepared on cp-Ti substrates for biomedical usage by a sol–gel process from the solutions containing polyethylene glycol (PEG) as a template. Variations of the crystal structure with heat-treatment temperature determined by XRD are different for TiO2 films and powders, due to the effect of titanium substrate. The surface texture of porous TiO2 films is analyzed by means of SEM and found to greatly depend on the concentration and molecular weight of PEG. The pore formation mechanism is discussed in relation to the self-assembly of PEG and phase separation between PEG adsorbed on TiO2 oligomers and ethanol. |
| Keywords: | TiO2 porous film Sol– gel Templating Polyethylene glycol Titanium substrate |
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