Effect of silica nanoparticles on mechanical properties of self-cured acrylic resin
| Autor: | C. M. B. Mussatto, Elisa Magno Nunes de Oliveira, Eduardo Gonçalves Mota, Ricardo Meurer Papaléo, Karthikeyan Subramani |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Composite number Nanoparticle Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Flexural strength Surface roughness General Materials Science Acrylic resin chemistry.chemical_classification General Chemistry Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences Monomer chemistry Modeling and Simulation visual_art Silanization visual_art.visual_art_medium 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Nanoparticle Research. 22 |
| ISSN: | 1572-896X 1388-0764 |
| Popis: | The purpose of this in vitro study is to evaluate the effect of the incorporation of silanized and non-silanized silica nanoparticles (~ 160 nm) in mechanical properties and surface roughness of self-cured acrylic resins. Five groups of samples were produced (with six specimens each), following the ISO 20795-1:2013 specifications. In the control group (Ctrl), no particles were added in the resin composition. Non-silanized silica nanoparticles were added either into the polymer (0.7 wt%, group G1) or into the monomer (0.27 wt%, G2). Two equivalent groups were formed for composite resins with silanized nanoparticles (groups G3 with 0.7 wt% incorporated into the polymer and G4 with 0.27 wt% added into the monomer). Data were submitted to Shapiro-Wilk (α = 0.05) and ANOVA/Tukey (α = 0.05). Nanoparticle-loaded resins showed similar microhardness as the control and a reduced flexural strength (20–27%) which was neither dependent on the amount of filler added nor in the method of nanoparticle incorporation. Surface silanization caused no major improvement in the mechanical behavior of the nanoresins but appears to improve dispersibility, as indicated by a smaller surface roughness. |
| Databáze: | OpenAIRE |
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