Indiana University-Purdue University Indianapolis (IUPUI) / Recent theoretical and experimental studies, suggest that Carbon nanotubes are
10-100 times higher than the strongest steel at a fraction of the weight. There are two
main types of CNTs that can have high structural perfection. Single-walled nanotubes
(SWNTs) consist of a single graphite sheet seamlessly wrapped into a cylindrical tube.
Multi-walled carbon nanotubes (MWNTs) comprise an array of such nanotubes concentrically
nested like rings of a tree trunk.
Denture base acrylics have been reinforced with different materials with limited
success. No single reinforced material has showed a great statistical difference in
mechanical improvement. The goal of this investigation was to study the effects of Single
Walled Carbon Nanotubes reinforcement on the mechanical properties of commercially
available denture base PMMA. Denture Base material was reinforced with Single-walled
Carbon Nanotubes (SWNTs) at dispersion of 0.25 wt % (group 1), 0.50 wt % (group 2),
0.75 wt % (group 3) and 0.0 wt % (group 4, control). Samples from each group were
evaluated for microhardness, flexural strength, flexural modulus, and fracture toughness.
The samples were tested in two conditions, as manufactured (dry) and after storing at 37 C
for 7 days (wet). Data from four experiments was analyzed by ANOVA. All control sample values were in the range of acceptance compared with previous studies. Higher values were
obtained for the control groups for flexural strength and modulus compared with the
experimental samples. (p < 0.05) There was no statistical difference regarding fracture
toughness between control and experimental groups. A statistical difference was observed
in Hardness. The experimental group showed higher values under compression.
| Identifer | oai:union.ndltd.org:IUPUI/oai:scholarworks.iupui.edu:1805/2315 |
| Date | January 2010 |
| Creators | Scotti, Kevin |
| Contributors | Chu, Tien-Min Gabriel, Paez de Mendoza, Carmen Y., Andres, Carl J., 1942-, Levon, John A., Hovijitra, Suteena, 1944- |
| Source Sets | Indiana University-Purdue University Indianapolis |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
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