Improvement of adhesive strength of segmented polyurethane on Ti–29Nb–13Ta–4.6Zr alloy through H2O2 treatment for biomedical applications

Authors

  • Junko Hieda,

    Corresponding author
    1. Department of Biomaterials Science, Institute for Materials Research, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
    • Department of Biomaterials Science, Institute for Materials Research, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
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  • Mitsuo Niinomi,

    1. Department of Biomaterials Science, Institute for Materials Research, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
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  • Masaaki Nakai,

    1. Department of Biomaterials Science, Institute for Materials Research, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
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  • Hiroyuki Kamura,

    1. Department of Medical Materials, Graduate School of Biomedical Engineering, Tohoku University, Aramaki Aza, Aoba-ku, Sendai 980-8579, Japan
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  • Harumi Tsutsumi,

    1. Department of Biomaterials Science, Institute for Materials Research, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
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  • Takao Hanawa

    1. Department of Metals, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
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  • How to cite this article: Hieda J, Niinomi M, Nakai M, Kamura H, Tsutsumi H, Hanawa, T. 2013. Improvement of adhesive strength of segmented polyurethane on Ti–29Nb–13Ta–4.6Zr alloy through H2O2 treatment for biomedical applications. J Biomed Mater Res Part B 2013:101B:776–783.

Abstract

The number of hydroxyl groups on a Ti–29Nb–13Ta–4.6Zr (TNTZ) alloy surface was controlled through H2O2 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 H2O2 concentration of 5% (v/v). On the other hand, an increase from 5% (v/v) to 30% (v/v) in H2O2 concentration leads to a decrease in the number of hydroxyl groups on the TNTZ surface because at higher H2O2 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.

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