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Enhanced interfacial adhesion and osseointegration of anodic TiO2 nanotube arrays on ultra-fine-grained titanium and underlying mechanisms

Enhanced interfacial adhesion and osseointegration of anodic TiO2 nanotube arrays on ultra-fine-grained titanium and underlying mechanisms
Enhanced interfacial adhesion and osseointegration of anodic TiO2 nanotube arrays on ultra-fine-grained titanium and underlying mechanisms
The poor adhesion of anodic TiO2 nanotubes (TNTs) arrays on titanium (Ti) substrates adversely affects applications in many fields especially biomedical engineering. Herein, an efficient strategy is described to improve the adhesion strength of TNTs by performing grain refinement in the underlying Ti substrate via high-pressure torsion processing, as a larger number of grain boundaries can provide more interfacial mechanical anchorage. This process also improves the biocompatibility and osseointegration of TNTs by increasing the surface elastic modulus. The TNTs in length of 0.4 μm have significantly larger adhesion strength than the 2.0 μm long ones because the shorter TNTs experience less interfacial internal stress. However, post-anodization annealing reduces the fluorine concentration in TNTs and adhesion strength due to the formation of interfacial cavities during crystallization. The interfacial structure of TNTs/Ti system and the mechanism of adhesion failures are further investigated and discussed.
Adhesion strength, High-pressure torsion, Ti-based implants, TiO2 nanotubes, Ultra-fine-grained materials
1742-7061
360-375
Hu, Nan
958c9af0-da5f-43eb-b486-35e483a82feb
Wu, Yuzheng
2b59beef-44af-44c8-a7a4-dbca87bd2bc3
Xie, Lingxia
6fc9141c-42d5-41dd-962b-a95700d75f9f
Mohd Yusuf, Shahir Yasin Bin
5888c057-33da-45f3-a84d-95a291db8f34
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, Marco
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Tong, Liping
df65aa4e-1d5d-47a0-8e22-fbacd1da7e57
Chu, Paul K.
45d2a73e-c742-4f4f-b6d2-2c165b5e015a
Wang, Huaiyu
1e86fd87-7d0e-4e3c-8eb2-4af3d73c4fa6
Hu, Nan
958c9af0-da5f-43eb-b486-35e483a82feb
Wu, Yuzheng
2b59beef-44af-44c8-a7a4-dbca87bd2bc3
Xie, Lingxia
6fc9141c-42d5-41dd-962b-a95700d75f9f
Mohd Yusuf, Shahir Yasin Bin
5888c057-33da-45f3-a84d-95a291db8f34
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, Marco
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Tong, Liping
df65aa4e-1d5d-47a0-8e22-fbacd1da7e57
Chu, Paul K.
45d2a73e-c742-4f4f-b6d2-2c165b5e015a
Wang, Huaiyu
1e86fd87-7d0e-4e3c-8eb2-4af3d73c4fa6

Hu, Nan, Wu, Yuzheng, Xie, Lingxia, Mohd Yusuf, Shahir Yasin Bin, Gao, Nong, Starink, Marco, Tong, Liping, Chu, Paul K. and Wang, Huaiyu (2020) Enhanced interfacial adhesion and osseointegration of anodic TiO2 nanotube arrays on ultra-fine-grained titanium and underlying mechanisms. Acta Biomaterialia, 106, 360-375. (doi:10.1016/j.actbio.2020.02.009).

Record type: Article

Abstract

The poor adhesion of anodic TiO2 nanotubes (TNTs) arrays on titanium (Ti) substrates adversely affects applications in many fields especially biomedical engineering. Herein, an efficient strategy is described to improve the adhesion strength of TNTs by performing grain refinement in the underlying Ti substrate via high-pressure torsion processing, as a larger number of grain boundaries can provide more interfacial mechanical anchorage. This process also improves the biocompatibility and osseointegration of TNTs by increasing the surface elastic modulus. The TNTs in length of 0.4 μm have significantly larger adhesion strength than the 2.0 μm long ones because the shorter TNTs experience less interfacial internal stress. However, post-anodization annealing reduces the fluorine concentration in TNTs and adhesion strength due to the formation of interfacial cavities during crystallization. The interfacial structure of TNTs/Ti system and the mechanism of adhesion failures are further investigated and discussed.

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More information

Accepted/In Press date: 6 February 2020
e-pub ahead of print date: 11 February 2020
Keywords: Adhesion strength, High-pressure torsion, Ti-based implants, TiO2 nanotubes, Ultra-fine-grained materials

Identifiers

Local EPrints ID: 438023
URI: http://eprints.soton.ac.uk/id/eprint/438023
ISSN: 1742-7061
PURE UUID: d228b4c4-5fd5-40e3-85e9-1643486de1e4

Catalogue record

Date deposited: 26 Feb 2020 17:31
Last modified: 25 Nov 2021 23:54

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Contributors

Author: Nan Hu
Author: Yuzheng Wu
Author: Lingxia Xie
Author: Nong Gao
Author: Marco Starink
Author: Liping Tong
Author: Paul K. Chu
Author: Huaiyu Wang

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