Incorporation of multiwalled carbon nanotubes to acrylic based bone cements: Effects on mechanical and thermal properties


Autoria(s): Ormsby, Ross; McNally, Tony; Mitchell, Christina; Dunne, Nicholas
Data(s)

01/02/2010

Resumo

Polymethyl methacrylate (PMMA) bone cement–multiwalled carbon nanotube (MWCNT) nanocomposites with a weight loading of 0.1% were prepared using 3 different methods of MWCNT incorporation. The mechanical and thermal properties of the resultant nanocomposite cements were characterised in accordance with the international standard for acrylic resin cements. The mechanical properties of the resultant nanocomposite cements were influenced by the type of MWCNT and method of incorporation used. The exothermic polymerisation reaction for the PMMA bone cement was significantly reduced when thermally conductive functionalised MWCNTs were added. This reduction in exotherm translated in a decrease in thermal necrosis index value of the respective nanocomposite cements, which potentially could reduce the hyperthermia experienced in vivo. The morphology and degree of dispersion of the MWCNTs in the PMMA matrix at different scales were analysed using scanning electron microscopy. Improvements in mechanical properties were attributed to the MWCNTs arresting/retarding crack propagation through the cement by providing a bridging effect into the wake of the crack, normal to the direction of crack growth. MWCNT agglomerations were evident within the cement microstructure, the degree of these agglomerations was dependent on the method used to incorporate the MWCNTs into the cement.

Identificador

http://pure.qub.ac.uk/portal/en/publications/incorporation-of-multiwalled-carbon-nanotubes-to-acrylic-based-bone-cements-effects-on-mechanical-and-thermal-properties(bddd1f26-897c-4b40-ae86-2e6b7792d0fc).html

http://dx.doi.org/10.1016/j.jmbbm.2009.10.002

http://www.scopus.com/inward/record.url?scp=73249146197&partnerID=8YFLogxK

Idioma(s)

eng

Direitos

info:eu-repo/semantics/restrictedAccess

Fonte

Ormsby , R , McNally , T , Mitchell , C & Dunne , N 2010 , ' Incorporation of multiwalled carbon nanotubes to acrylic based bone cements: Effects on mechanical and thermal properties ' Journal of Mechanical Behavior of Biomedical Materials , vol 3 , no. 2 , pp. 136-145 . DOI: 10.1016/j.jmbbm.2009.10.002

Palavras-Chave #/dk/atira/pure/subjectarea/asjc/2200/2204 #Biomedical Engineering #/dk/atira/pure/subjectarea/asjc/2200/2211 #Mechanics of Materials #/dk/atira/pure/subjectarea/asjc/2500/2502 #Biomaterials
Tipo

article