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Improvement of adhesive strength of segmented polyurethane on Ti–29Nb–13Ta–4.6Zr alloy through H 2 O 2 treatment for biomedical applications
Author(s) -
Hieda Junko,
Niinomi Mitsuo,
Nakai Masaaki,
Kamura Hiroyuki,
Tsutsumi Harumi,
Hanawa Takao
Publication year - 2013
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.32881
Subject(s) - materials science , adhesive , composite material , shear strength (soil) , silane , surface modification , alloy , biocompatibility , composite number , durability , immersion (mathematics) , metallurgy , chemical engineering , layer (electronics) , environmental science , mathematics , soil science , pure mathematics , engineering , soil water
The number of hydroxyl groups on a Ti–29Nb–13Ta–4.6Zr (TNTZ) alloy surface was controlled through H 2 O 2 treatment for further improvement of the adhesive strength and durability against water of TNTZ/silane layers (SILs)/segmented polyurethane (SPU) composites. The effect of the terminal functional groups on the adhesive strength of SPU on TNTZ, and the adhesiveness of SPU on TNTZ against water was investigated. Three types of silane‐coupling agents were used to bind TNTZ and SPU: methacryloxypropyltrimethoxysilane (γ‐MPTS), aminopropyltriethoxysilane (APS), and mercaptopropyltrimethoxysilane (γ‐MPS). The adhesive strength of each composite was evaluated by shear bonding tests. The number of hydroxyl groups increases with an increase in treatment time at a H 2 O 2 concentration of 5% (v/v). On the other hand, an increase from 5% (v/v) to 30% (v/v) in H 2 O 2 concentration leads to a decrease in the number of hydroxyl groups on the TNTZ surface because at higher H 2 O 2 concentrations, the reaction that consumes the hydroxyl groups is dominant. The shear bonding strength is doubled compared with the untreated TNTZ/SIL/SPU interface. Although the shear bonding strength decreases after immersion in water for 30 days when APS and γ‐MPS are used, TNTZ/γ‐MPTS/SPU composites exhibit good durability to water and maintain an equivalent shear bonding strength before immersion in water. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2013.