RT Journal Article
T1 Advanced g-mps-pmma bone cements: Influence of graphene silanisation on fatigue performance, thermal properties and biocompatibility
A1 Abenojar Buendía, Juana
A1 Ballesteros Iglesias, Yolanda
A1 Real Romero, Juan Carlos del
A1 Dunne, Nicholas J.
A1 Paz, Eva
AB The incorporation of well-dispersed graphene (G) powder to polymethyl methacrylate(PMMA) bone cement has been demonstrated as a promising solution to improving its mechanicalperformance. However, two crucial aspects limit the effectiveness of G as a reinforcing agent: (1)the poor dispersion and (2) the lack of strong interfacial bonds between G and the matrix of thebone cement. This work reports a successful functionalisation route to promote the homogenousdispersion of G via silanisation using 3-methacryloxypropyltrimethoxy silane (MPS). Furthermore,the effects of the silanisation on the mechanical, thermal and biocompatibility properties of bonecements are presented. In comparison with unsilanised G, the incorporation of silanised G (G_MPS1and G_MPS2) increased the bending strength by 17%, bending modulus by 15% and deflection atfailure by 17%. The most impressive results were obtained for the mechanical properties underfatigue loading, where the incorporation of G_MPS doubled the Fatigue Performance Index (I) valueof unsilanised G-bone cement—meaning a 900% increase over the I value of the cement without G.Additionally, to ensure that the silanisation did not have a negative influence on other fundamentalproperties of bone cement, it was demonstrated that the thermal properties and biocompatibilitywere not negatively impacted—allowing its potential clinical progression.
PB MDPI
SN 2079-4991
YR 2021
FD 2021-01-08
LK https://hdl.handle.net/10016/33139
UL https://hdl.handle.net/10016/33139
LA eng
DS e-Archivo
RD 12 sept. 2024