TY - JOUR
T1 - Effect of terminal functional groups of silane layers on adhesive strength between biomedical Ti-29Nb-13Ta-4.6Zr alloy and segment polyurethanes
AU - Hieda, Junko
AU - Niinomi, Mitsuo
AU - Nakai, Masaaki
AU - Kamura, Hiroyuki
AU - Tsutsumi, Harumi
AU - Hanawa, Takao
N1 - Funding Information:
This study has been supported in part by a Grant-in-aid for Scientific Research from the Japan Society for the Promotion of Science (/# 21656171 ); the Global COE program “Materials Integration International Center of Education and Research, Tohoku University,” Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan ; Tohoku Leading Women's Jump Up Project, Tohoku University ; the inter-university cooperative research program “ Highly-functional Interface Science: Innovation of Biomaterials with Highly-functional Interface to Host and Parasite, Tohoku University and Kyushu University”, MEXT ; and the cooperative research program of the Advanced Research Center of Metallic Glasses, Institute for Materials Research, Tohoku University .
PY - 2012/2/25
Y1 - 2012/2/25
N2 - Composite materials that consisted of a biomedical β-type titanium alloy, Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) with low Young's modulus and segment polyurethane (SPU) have been fabricated for application in biomedical devices. The effects of different kinds of terminal functional groups and the thickness of the silane layers (SIL) on the adhesive strength between TNTZ and SPU were investigated by means of shear bonding tests. The following silane coupling agents were employed in this study: 3-methacryloxypropyltrimethoxysilane (γ-MPTS), aminopropyltriethoxysilane (APS), and 3-mercaptopropyltrimethoxysilane (γ-MPS). Furthermore, the shear bonding strength of the TNTZ/SIL/SPU interface was also characterized after immersion in water for 30 d. Silane coupling treatment produces a ten-fold increase in the shear bonding strength, independent of the type of terminal functional groups and the thickness of the silane layers. Scanning electron microscopic evaluation of the fracture surfaces of the TNTZ/SIL/SPU composites after the shear bonding tests coupled with energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy revealed that the TNTZ/SIL/SPU composites are partially fractured at the interfaces of the TNTZ/SIL while the rest of the fracture occurs at the interfaces of the SIL/SPU in single sample. The shear bonding strength decreases after immersion in water for 30. d when APS and γ-MPS are used as the silane coupling agents, because stable chemical bonding is not achieved between the silane layer and SPU, whereas the bonding of the γ-MPTS composite is not affected by exposure to water.
AB - Composite materials that consisted of a biomedical β-type titanium alloy, Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) with low Young's modulus and segment polyurethane (SPU) have been fabricated for application in biomedical devices. The effects of different kinds of terminal functional groups and the thickness of the silane layers (SIL) on the adhesive strength between TNTZ and SPU were investigated by means of shear bonding tests. The following silane coupling agents were employed in this study: 3-methacryloxypropyltrimethoxysilane (γ-MPTS), aminopropyltriethoxysilane (APS), and 3-mercaptopropyltrimethoxysilane (γ-MPS). Furthermore, the shear bonding strength of the TNTZ/SIL/SPU interface was also characterized after immersion in water for 30 d. Silane coupling treatment produces a ten-fold increase in the shear bonding strength, independent of the type of terminal functional groups and the thickness of the silane layers. Scanning electron microscopic evaluation of the fracture surfaces of the TNTZ/SIL/SPU composites after the shear bonding tests coupled with energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy revealed that the TNTZ/SIL/SPU composites are partially fractured at the interfaces of the TNTZ/SIL while the rest of the fracture occurs at the interfaces of the SIL/SPU in single sample. The shear bonding strength decreases after immersion in water for 30. d when APS and γ-MPS are used as the silane coupling agents, because stable chemical bonding is not achieved between the silane layer and SPU, whereas the bonding of the γ-MPTS composite is not affected by exposure to water.
KW - Adhesive strength
KW - Silane coupling agent
KW - β-type titanium alloy
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U2 - 10.1016/j.surfcoat.2011.12.044
DO - 10.1016/j.surfcoat.2011.12.044
M3 - Article
AN - SCOPUS:84857656733
SN - 0257-8972
VL - 206
SP - 3137
EP - 3141
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
IS - 13
ER -