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- PMID: 18431757
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Article: Nickel release behavior and surface characteristics of porous NiTi shape memory alloy modified by different chemical processes
Title | Nickel release behavior and surface characteristics of porous NiTi shape memory alloy modified by different chemical processes | ||||||
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Authors | |||||||
Keywords | Chemical treatment Nickel release Porous NiTi shape memory alloy Surface modification XPS | ||||||
Issue Date | 2009 | ||||||
Publisher | John Wiley & Sons, Inc. The Journal's web site is located at http://www.interscience.wiley.com/jpages/0021-9304/ | ||||||
Citation | Journal Of Biomedical Materials Research - Part A, 2009, v. 89 n. 2, p. 483-489 How to Cite? | ||||||
Abstract | As a non-line-of-sight surface modification technique, chemical treatment is an effective method to treat porous NiTi with complex surface morphologies and large exposed areas due to its liquidity and low temperature. In the work described here, three different chemical processes are used to treat porous NiTi alloys. Our results show that H2O2 treatment, NaOH treatment, and H2O2 pre-treatment plus subsequent NaOH treatment can mitigate leaching of nickel from the alloy. The porous NiTi samples modified by the two latter processes favor deposition of a layer composed of Ca and P due to the formation of bioactive Na2TiO 3 on the surface. Among the three processes, H2O 2 pre-treatment plus subsequent NaOH modification is the most effective in suppressing nickel release. Small area X-ray photoelectron spectroscopy reveals that the surfaces treated by different chemical processes have different structures and compositions. The sample modified by the H 2O2 treatment is composed of rough TiO2 on the outer surface and an oxide transition layer underneath whereas the sample treated by NaOH comprises a surface layer of titanium oxide and Na 2TiO3 together with a transition layer. The sample processed by the H2O2 and NaOH treatment has a pure Na2TiO3 layer on the surface and a transition layer underneath. These results help to elucidate the different nickel release behavior and bioactivity of porous NiTi alloys processed by different methods. © 2008 Wiley Periodicals, Inc. | ||||||
Persistent Identifier | http://hdl.handle.net/10722/139539 | ||||||
ISSN | 2023 Impact Factor: 3.9 2023 SCImago Journal Rankings: 0.807 | ||||||
ISI Accession Number ID |
Funding Information: Contract grant sponsor: City University of Hong Kong Applied Research Grant (ARG); contract grant number: 9667002 | ||||||
References | |||||||
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DC Field | Value | Language |
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dc.contributor.author | Wu, S | en_HK |
dc.contributor.author | Liu, X | en_HK |
dc.contributor.author | Chan, YL | en_HK |
dc.contributor.author | Chu, PK | en_HK |
dc.contributor.author | Chung, CY | en_HK |
dc.contributor.author | Chu, C | en_HK |
dc.contributor.author | Yeung, KWK | en_HK |
dc.contributor.author | Lu, WW | en_HK |
dc.contributor.author | Cheung, KMC | en_HK |
dc.contributor.author | Luk, KDK | en_HK |
dc.date.accessioned | 2011-09-23T05:51:26Z | - |
dc.date.available | 2011-09-23T05:51:26Z | - |
dc.date.issued | 2009 | en_HK |
dc.identifier.citation | Journal Of Biomedical Materials Research - Part A, 2009, v. 89 n. 2, p. 483-489 | en_HK |
dc.identifier.issn | 1549-3296 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/139539 | - |
dc.description.abstract | As a non-line-of-sight surface modification technique, chemical treatment is an effective method to treat porous NiTi with complex surface morphologies and large exposed areas due to its liquidity and low temperature. In the work described here, three different chemical processes are used to treat porous NiTi alloys. Our results show that H2O2 treatment, NaOH treatment, and H2O2 pre-treatment plus subsequent NaOH treatment can mitigate leaching of nickel from the alloy. The porous NiTi samples modified by the two latter processes favor deposition of a layer composed of Ca and P due to the formation of bioactive Na2TiO 3 on the surface. Among the three processes, H2O 2 pre-treatment plus subsequent NaOH modification is the most effective in suppressing nickel release. Small area X-ray photoelectron spectroscopy reveals that the surfaces treated by different chemical processes have different structures and compositions. The sample modified by the H 2O2 treatment is composed of rough TiO2 on the outer surface and an oxide transition layer underneath whereas the sample treated by NaOH comprises a surface layer of titanium oxide and Na 2TiO3 together with a transition layer. The sample processed by the H2O2 and NaOH treatment has a pure Na2TiO3 layer on the surface and a transition layer underneath. These results help to elucidate the different nickel release behavior and bioactivity of porous NiTi alloys processed by different methods. © 2008 Wiley Periodicals, Inc. | en_HK |
dc.language | eng | en_US |
dc.publisher | John Wiley & Sons, Inc. The Journal's web site is located at http://www.interscience.wiley.com/jpages/0021-9304/ | en_HK |
dc.relation.ispartof | Journal of Biomedical Materials Research - Part A | en_HK |
dc.rights | Journal of Biomedical Materials Research Part A. Copyright © John Wiley & Sons, Inc. | - |
dc.subject | Chemical treatment | en_HK |
dc.subject | Nickel release | en_HK |
dc.subject | Porous NiTi shape memory alloy | en_HK |
dc.subject | Surface modification | en_HK |
dc.subject | XPS | en_HK |
dc.subject.mesh | Body Fluids | - |
dc.subject.mesh | Chemical Processes | - |
dc.subject.mesh | Nickel - analysis - chemistry | - |
dc.subject.mesh | Porosity | - |
dc.subject.mesh | Titanium - chemistry | - |
dc.title | Nickel release behavior and surface characteristics of porous NiTi shape memory alloy modified by different chemical processes | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1549-3296&volume=89&issue=2&spage=483&epage=489&date=2009&atitle=Nickel+release+behavior+and+surface+characteristics+of+porous+NiTi+shape+memory+alloy+modified+by+different+chemical+processes | - |
dc.identifier.email | Yeung, KWK:wkkyeung@hkucc.hku.hk | en_HK |
dc.identifier.email | Lu, WW:wwlu@hku.hk | en_HK |
dc.identifier.email | Cheung, KMC:cheungmc@hku.hk | en_HK |
dc.identifier.email | Luk, KDK:hcm21000@hku.hk | en_HK |
dc.identifier.authority | Yeung, KWK=rp00309 | en_HK |
dc.identifier.authority | Lu, WW=rp00411 | en_HK |
dc.identifier.authority | Cheung, KMC=rp00387 | en_HK |
dc.identifier.authority | Luk, KDK=rp00333 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1002/jbm.a.32008 | en_HK |
dc.identifier.pmid | 18431757 | - |
dc.identifier.scopus | eid_2-s2.0-65449124391 | en_HK |
dc.identifier.hkuros | 192170 | en_US |
dc.identifier.hkuros | 166287 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-65449124391&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 89 | en_HK |
dc.identifier.issue | 2 | en_HK |
dc.identifier.spage | 483 | en_HK |
dc.identifier.epage | 489 | en_HK |
dc.identifier.isi | WOS:000264850200021 | - |
dc.publisher.place | United States | en_HK |
dc.relation.project | Development of novel materials for orthopaedics | - |
dc.relation.project | Development of novel materials for orthopaedics | - |
dc.identifier.scopusauthorid | Wu, S=15125218800 | en_HK |
dc.identifier.scopusauthorid | Liu, X=8408205200 | en_HK |
dc.identifier.scopusauthorid | Chan, YL=8250546500 | en_HK |
dc.identifier.scopusauthorid | Chu, PK=36040705700 | en_HK |
dc.identifier.scopusauthorid | Chung, CY=8100842800 | en_HK |
dc.identifier.scopusauthorid | Chu, C=7404345713 | en_HK |
dc.identifier.scopusauthorid | Yeung, KWK=13309584700 | en_HK |
dc.identifier.scopusauthorid | Lu, WW=7404215221 | en_HK |
dc.identifier.scopusauthorid | Cheung, KMC=7402406754 | en_HK |
dc.identifier.scopusauthorid | Luk, KDK=7201921573 | en_HK |
dc.identifier.issnl | 1549-3296 | - |