Chemical Characterisation of Silanised Zirconia Nanoparticles
and Their Effects on the Properties of
PMMA-Zirconia Nanocomposites
الباحث الأول:
Saleh Zidan
الباحثين الآخرين:
Nikolaos Silikas 2 , Suhad Al-Nasrawi 3 , Julfikar Haider 2,4 , Abdulrahman Alshabib 5,
Alshame Alshame 6 and Julian Yates
المجلة:
Materials 2021, 14,
3212.
تاريخ النشر:
None
مختصر البحث:
Abstract: Objectives: The objective of this study was to investigate the mechanical properties of highimpact
(HI) heat-cured acrylic resin (PMMA) reinforced with silane-treated zirconia nanoparticles.
Methods: Forty-five PMMA specimens reinforced …
Abstract: Objectives: The objective of this study was to investigate the mechanical properties of highimpact
(HI) heat-cured acrylic resin (PMMA) reinforced with silane-treated zirconia nanoparticles.
Methods: Forty-five PMMA specimens reinforced with zirconia were fabricated and divided into three
groups: Pure HI PMMA (control group), PMMA reinforced with 3 wt.% of non-silanised zirconia
nanoparticles and PMMA reinforced with 3 wt.% of silanised zirconia nanoparticles. Silanised
and non-silanised zirconia nanoparticles were analysed with Fourier Transform Infrared (FTIR)
Spectroscopy. For measuring the flexural modulus and strength, a Zwick universal tester was
used, and for surface hardness, a Vickers hardness tester were used. Furthermore, raw materials and
fractured surfaces were analysed using Scanning Electron Microscopy (SEM). A one-way ANOVA test
followed by a post-hoc Bonferroni test was employed to analyse the data. Results: The results showed
that the mean values for flexural strength (83.5 6.2 MPa) and surface hardness (20.1 2.3 kg/mm2)
of the group containing 3 wt.% treated zirconia increased significantly (p < 0.05) in comparison to
the specimens in the group containing non-treated zirconia (59.9 7.1 MPa; 15.0 0.2 kg/mm2)
and the control group (72.4 8.6 MPa; 17.1 0.9 kg/mm2). However, the group with silanised
zirconia showed an increase in flexural modulus (2313 161 MPa) but was not significantly different
(p > 0.05) from the non-silanised group (2207 252 MPa) and the control group (1971 235 MPa).
Conclusion: Silane-treated zirconia nano-filler improves the surface hardness and flexural strength of
HI PMMA-zirconia nanocomposites, giving a potentially longer service life of the denture base.
