A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Static and dynamic mechanical properties of graphene oxide-based bone cementing agents
Tekijät: Khan AA, Mirza EH, Mohamed BA, El-Sharawy MA, Al-Asmari MH, Al-Khureif AA, Dar MA, Vallittu PK
Kustantaja: SAGE PUBLICATIONS LTD
Julkaisuvuosi: 2019
Journal: Journal of Composite Materials
Tietokannassa oleva lehden nimi: JOURNAL OF COMPOSITE MATERIALS
Lehden akronyymi: J COMPOS MATER
Vuosikerta: 53
Numero: 16
Aloitussivu: 2297
Lopetussivu: 2304
Sivujen määrä: 8
ISSN: 0021-9983
eISSN: 1530-793X
DOI: https://doi.org/10.1177/0021998319826347
Tiivistelmä
The purpose of this laboratory study was to formulate graphene oxide (GO) nano-sheets and characterize composites of homogenously dispersed GO sheets in poly(methyl methacrylate) (PMMA) acrylic resin of two groups, i.e., with 0.025 wt/wt.% GO (GO1-group) and 0.05 wt/wt.% GO (GO2-group). A large array of surface, mechanical and dynamic mechanical properties, including creep, recovery, stress relaxation behaviour and temperature and frequency sweep of the formulated bone cements were further characterized. Analysis of variance test results (p = 0.05, n = 5) indicated that the nanohardness and elastic modulus of the experimental groups were not significantly different from those of the control. Micro-computed tomography results showed high porosity in the experimental groups. The compressive strength significantly increased both in GO1- and GO2-group under dry and wet storage conditions. The dynamic mechanical properties suggest a desirable role of GO in polymerization with PMMA. The produced GO-PMMA composites exhibited the expected characteristics, so their use in developing low-loading bone cement composites appears to be promising.
The purpose of this laboratory study was to formulate graphene oxide (GO) nano-sheets and characterize composites of homogenously dispersed GO sheets in poly(methyl methacrylate) (PMMA) acrylic resin of two groups, i.e., with 0.025 wt/wt.% GO (GO1-group) and 0.05 wt/wt.% GO (GO2-group). A large array of surface, mechanical and dynamic mechanical properties, including creep, recovery, stress relaxation behaviour and temperature and frequency sweep of the formulated bone cements were further characterized. Analysis of variance test results (p = 0.05, n = 5) indicated that the nanohardness and elastic modulus of the experimental groups were not significantly different from those of the control. Micro-computed tomography results showed high porosity in the experimental groups. The compressive strength significantly increased both in GO1- and GO2-group under dry and wet storage conditions. The dynamic mechanical properties suggest a desirable role of GO in polymerization with PMMA. The produced GO-PMMA composites exhibited the expected characteristics, so their use in developing low-loading bone cement composites appears to be promising.
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