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Article: Spark plasma sintered hydroxyapatite/graphite nanosheet and hydroxyapatite/multiwalled carbon nanotube composites: Mechanical and in vitro cellular properties
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TitleSpark plasma sintered hydroxyapatite/graphite nanosheet and hydroxyapatite/multiwalled carbon nanotube composites: Mechanical and in vitro cellular properties
 
AuthorsZhu, J2
Wong, HM1
Yeung, KWK1
Tjong, SC2
 
KeywordsCarbon-nanotube composites
Cellular properties
Cell culture
Nanocomposites
Spark plasma sintering
 
Issue Date2011
 
PublisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/aem
 
CitationAdvanced Engineering Materials, 2011, v. 13 n. 4, p. 336-341 [How to Cite?]
DOI: http://dx.doi.org/10.1002/adem.201000300
 
AbstractHyroxyapatite (HA) and its nanocomposites reinforced with 0.5, 1, 1.5, and 2wt% graphite nanosheets (GNs) and multi-walled carbon nanotubes (MWNTs) are fabricated by means of spark plasma sintering (SPS) process. The effects of MWNT and GN additions on the morphology, mechanical behavior, cell adhesion, and biocompatibility of HA were studied. Three-point-bending test shows that the bending strength of MWNT/HA nanocomposites increases with increasing MWNT content. However, the bending strength of GN/HA nanocomposites initially increases by adding 0.5wt% GN, and then decreases markedly as the filler content increases. Cell culture and viability test results demonstrate that the GNs with diameters of several micrometers retard osteoblast cell adhesion and proliferation on the GN/HA nanocomposite. In contrast, the addition of 2wt% MWNT to HA is beneficial to promote osteoblast adhesion and proliferation, thereby enhancing the biocompatibility of MWNT/HA nanocomposite. Bending test is used to evaluate the bending strength of spark plasma sintered hydroxyapatite (HA)-based composites reinforced with low loading levels of multi-walled carbon nanotubes (MWNTs) and graphite nanosheets (GNs). The bending stress of MWNT/HA nanocomposites increases markedly with increasing filler content. In contrast, the bending stress of GN/HA nanocomposites reaches an apparent maximum at 0.5wt% GN, thereafter decreases continuously with increasing filler content. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA.
 
ISSN1438-1656
2012 Impact Factor: 1.608
2012 SCImago Journal Rankings: 0.725
 
DOIhttp://dx.doi.org/10.1002/adem.201000300
 
ISI Accession Number IDWOS:000288787500018
Funding AgencyGrant Number
Research Grants Council of Hong Kong, Hong Kong Special Administrative Region, ChinaCityU 120808
Funding Information:

This work is fully supported by the GRF grant (CityU 120808), the Research Grants Council of Hong Kong, Hong Kong Special Administrative Region, China.

 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorZhu, J
 
dc.contributor.authorWong, HM
 
dc.contributor.authorYeung, KWK
 
dc.contributor.authorTjong, SC
 
dc.date.accessioned2011-09-23T05:51:34Z
 
dc.date.available2011-09-23T05:51:34Z
 
dc.date.issued2011
 
dc.description.abstractHyroxyapatite (HA) and its nanocomposites reinforced with 0.5, 1, 1.5, and 2wt% graphite nanosheets (GNs) and multi-walled carbon nanotubes (MWNTs) are fabricated by means of spark plasma sintering (SPS) process. The effects of MWNT and GN additions on the morphology, mechanical behavior, cell adhesion, and biocompatibility of HA were studied. Three-point-bending test shows that the bending strength of MWNT/HA nanocomposites increases with increasing MWNT content. However, the bending strength of GN/HA nanocomposites initially increases by adding 0.5wt% GN, and then decreases markedly as the filler content increases. Cell culture and viability test results demonstrate that the GNs with diameters of several micrometers retard osteoblast cell adhesion and proliferation on the GN/HA nanocomposite. In contrast, the addition of 2wt% MWNT to HA is beneficial to promote osteoblast adhesion and proliferation, thereby enhancing the biocompatibility of MWNT/HA nanocomposite. Bending test is used to evaluate the bending strength of spark plasma sintered hydroxyapatite (HA)-based composites reinforced with low loading levels of multi-walled carbon nanotubes (MWNTs) and graphite nanosheets (GNs). The bending stress of MWNT/HA nanocomposites increases markedly with increasing filler content. In contrast, the bending stress of GN/HA nanocomposites reaches an apparent maximum at 0.5wt% GN, thereafter decreases continuously with increasing filler content. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationAdvanced Engineering Materials, 2011, v. 13 n. 4, p. 336-341 [How to Cite?]
DOI: http://dx.doi.org/10.1002/adem.201000300
 
dc.identifier.doihttp://dx.doi.org/10.1002/adem.201000300
 
dc.identifier.epage341
 
dc.identifier.hkuros192183
 
dc.identifier.isiWOS:000288787500018
Funding AgencyGrant Number
Research Grants Council of Hong Kong, Hong Kong Special Administrative Region, ChinaCityU 120808
Funding Information:

This work is fully supported by the GRF grant (CityU 120808), the Research Grants Council of Hong Kong, Hong Kong Special Administrative Region, China.

 
dc.identifier.issn1438-1656
2012 Impact Factor: 1.608
2012 SCImago Journal Rankings: 0.725
 
dc.identifier.issue4
 
dc.identifier.scopuseid_2-s2.0-79953190060
 
dc.identifier.spage336
 
dc.identifier.urihttp://hdl.handle.net/10722/139550
 
dc.identifier.volume13
 
dc.languageeng
 
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/aem
 
dc.publisher.placeGermany
 
dc.relation.ispartofAdvanced Engineering Materials
 
dc.relation.referencesReferences in Scopus
 
dc.subjectCarbon-nanotube composites
 
dc.subjectCellular properties
 
dc.subjectCell culture
 
dc.subjectNanocomposites
 
dc.subjectSpark plasma sintering
 
dc.titleSpark plasma sintered hydroxyapatite/graphite nanosheet and hydroxyapatite/multiwalled carbon nanotube composites: Mechanical and in vitro cellular properties
 
dc.typeArticle
 
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Author Affiliations
  1. The University of Hong Kong
  2. City University of Hong Kong