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- Title
Effect of nano ZrO<sub>2</sub> on flexural strength and surface hardness of polymethylmethacrylate.
- Authors
ZHANG Xin-jing; ZHANG Xiu-yin; ZHU Bang-shang; ZHANG Lu; QIAN Chen
- Abstract
PURPOSE: To study the effect of polymethylmethacrylate (PMMA's) mechanical properties reinforced by nano ZrO2 particles with different filling amounts. METHODS: The nano ZrO2 particles were surface-treated by silane coupling agent (Z-6030) in 1.5wt% ratio, the untreated particles were regarded as the control group. The modified nano ZrO2 particles were mixed with the PMMA powders in proportion of 0.5%,1%,I.5%,2%,2.5%,3% and 3.5%, respectively. Then the nano ZrO2/PMMA composites were synthesized. The specimens were examined by Vickers hardness test and three-point bending test , the surface of fracture was observed by SEM. All data were analyzed with ANOVA test by SAS 6.12 software package. RESULTS: Fourier transform infrared (FFIR) spectroscopy showed that the silane coupling agent linked to the nano ZrO2 particles surface after treating, the Vickers hardness was highest when the adding amount of nano ZrO2 particles was 1.5% and 2%(P<0.05).The flexural strength of nano ZrO2/PMMA composites in the proportion of 1.5% was the highest(P<0.05).SEM indicated that the ductile fracture existed on the surface of fracture. CONCLUSIONS: The silane coupling agent can enhance the bonding strength of nano ZrO2 particles and the PMMA matrix , the PMMA's mechanical properties could be improved by adding the nano ZrO2 particle in an appropriate proportion. 1.5% and 2% of nano ZrO2 particles render the nanocomposite the maximal Vickers hardness, while 1.5% ZrO2 nanoparticles render the nanocomposite the maximal flexural strength. Supported by Research Fund of Science and Technology Commission of Shanghai Municipality (065CJ14048,09CJI408900).
- Subjects
ZIRCONIUM oxide; NANOSTRUCTURED materials; POLYMETHYLMETHACRYLATE; HARDNESS testing; STRENGTH of materials; MATRICES (Mathematics); FOURIER transform infrared spectroscopy
- Publication
Shanghai Journal of Stomatology, 2011, Vol 20, Issue 4, p358
- ISSN
1006-7248
- Publication type
Article