Rapid direct deposition of TiH2 paste for porous Ti scaffolds with tailored porous structures and mechanical properties

Min Kyung Ahn; Jung Bin Lee; Young Hag Koh; Hyoun Ee Kim

doi:10.1016/j.matchemphys.2016.03.033

Rapid direct deposition of TiH₂ paste for porous Ti scaffolds with tailored porous structures and mechanical properties

Min Kyung Ahn, Jung Bin Lee, Young Hag Koh, Hyoun Ee Kim

School of Biomedical Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

We herein demonstrate the utility of the rapid direct deposition of a titanium hydride (TiH₂) paste for the production of porous titanium (Ti) scaffolds with tailored porous structures and mechanical properties. In particular, methylcellulous (MC) polymer was used as the binder, since it can rapidly solidify in acetone through solvent extraction, thus enabling deposited green filaments to have high structural integrity. In addition, TiH₂ powder was used as the Ti source because of its smaller particle size than commercial Ti powder and conversion to Ti metal through a two-step dehydrogenation process. The uses of fine TiH₂ powder and MC binder allowed for the creation of three-dimensionally interconnected periodic macrochannels with sizes of ∼165 ± 14 × 167 ± 25 μm. The produced Ti scaffold had a porosity of ∼42 ± 7 vol % and a reasonably high compressive strength of 48 ± 15 MPa. In addition, the porosity and mechanical properties of porous Ti scaffolds could be tailored simply by adjusting the initial distances between deposited green TiH₂/MC filaments. All of the porous Ti scaffolds produced with various porosities showed good in vitro biocompatibility.

Original language	English
Pages (from-to)	104-109
Number of pages	6
Journal	Materials Chemistry and Physics
Volume	176
DOIs	https://doi.org/10.1016/j.matchemphys.2016.03.033
Publication status	Published - 2016 Jun 15

Keywords

Biomaterials
Mechanical properties
Metals
Powder metallurgy

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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title = "Rapid direct deposition of TiH2 paste for porous Ti scaffolds with tailored porous structures and mechanical properties",

abstract = "We herein demonstrate the utility of the rapid direct deposition of a titanium hydride (TiH2) paste for the production of porous titanium (Ti) scaffolds with tailored porous structures and mechanical properties. In particular, methylcellulous (MC) polymer was used as the binder, since it can rapidly solidify in acetone through solvent extraction, thus enabling deposited green filaments to have high structural integrity. In addition, TiH2 powder was used as the Ti source because of its smaller particle size than commercial Ti powder and conversion to Ti metal through a two-step dehydrogenation process. The uses of fine TiH2 powder and MC binder allowed for the creation of three-dimensionally interconnected periodic macrochannels with sizes of ∼165 ± 14 × 167 ± 25 μm. The produced Ti scaffold had a porosity of ∼42 ± 7 vol % and a reasonably high compressive strength of 48 ± 15 MPa. In addition, the porosity and mechanical properties of porous Ti scaffolds could be tailored simply by adjusting the initial distances between deposited green TiH2/MC filaments. All of the porous Ti scaffolds produced with various porosities showed good in vitro biocompatibility.",

keywords = "Biomaterials, Mechanical properties, Metals, Powder metallurgy",

author = "Ahn, {Min Kyung} and Lee, {Jung Bin} and Koh, {Young Hag} and Kim, {Hyoun Ee}",

note = "Funding Information: This work was supported by the Industrial Strategic Technology Development Program (contract No. 10045329 , Development of customized implant with porous structure for bone replacement) funded by the Ministry of Trade, Industry and Energy (MOTIE) of Korea . Publisher Copyright: {\textcopyright} 2016 Elsevier B.V. Copyright: Copyright 2016 Elsevier B.V., All rights reserved.",

year = "2016",

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doi = "10.1016/j.matchemphys.2016.03.033",

language = "English",

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AU - Ahn, Min Kyung

AU - Lee, Jung Bin

AU - Koh, Young Hag

AU - Kim, Hyoun Ee

N1 - Funding Information: This work was supported by the Industrial Strategic Technology Development Program (contract No. 10045329 , Development of customized implant with porous structure for bone replacement) funded by the Ministry of Trade, Industry and Energy (MOTIE) of Korea . Publisher Copyright: © 2016 Elsevier B.V. Copyright: Copyright 2016 Elsevier B.V., All rights reserved.

PY - 2016/6/15

Y1 - 2016/6/15

N2 - We herein demonstrate the utility of the rapid direct deposition of a titanium hydride (TiH2) paste for the production of porous titanium (Ti) scaffolds with tailored porous structures and mechanical properties. In particular, methylcellulous (MC) polymer was used as the binder, since it can rapidly solidify in acetone through solvent extraction, thus enabling deposited green filaments to have high structural integrity. In addition, TiH2 powder was used as the Ti source because of its smaller particle size than commercial Ti powder and conversion to Ti metal through a two-step dehydrogenation process. The uses of fine TiH2 powder and MC binder allowed for the creation of three-dimensionally interconnected periodic macrochannels with sizes of ∼165 ± 14 × 167 ± 25 μm. The produced Ti scaffold had a porosity of ∼42 ± 7 vol % and a reasonably high compressive strength of 48 ± 15 MPa. In addition, the porosity and mechanical properties of porous Ti scaffolds could be tailored simply by adjusting the initial distances between deposited green TiH2/MC filaments. All of the porous Ti scaffolds produced with various porosities showed good in vitro biocompatibility.

AB - We herein demonstrate the utility of the rapid direct deposition of a titanium hydride (TiH2) paste for the production of porous titanium (Ti) scaffolds with tailored porous structures and mechanical properties. In particular, methylcellulous (MC) polymer was used as the binder, since it can rapidly solidify in acetone through solvent extraction, thus enabling deposited green filaments to have high structural integrity. In addition, TiH2 powder was used as the Ti source because of its smaller particle size than commercial Ti powder and conversion to Ti metal through a two-step dehydrogenation process. The uses of fine TiH2 powder and MC binder allowed for the creation of three-dimensionally interconnected periodic macrochannels with sizes of ∼165 ± 14 × 167 ± 25 μm. The produced Ti scaffold had a porosity of ∼42 ± 7 vol % and a reasonably high compressive strength of 48 ± 15 MPa. In addition, the porosity and mechanical properties of porous Ti scaffolds could be tailored simply by adjusting the initial distances between deposited green TiH2/MC filaments. All of the porous Ti scaffolds produced with various porosities showed good in vitro biocompatibility.

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KW - Powder metallurgy

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