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Updated: May 4, 2026
Preparation of Silica Nanoparticles Through Microwave-assisted Acid-catalysis
Published on: December 16, 2013
Poly(methyl-methacrylate) nanocomposites with low silica addition
Sebastian Balos1, Branka Pilic2, Dubravka Markovic3
1Assistant Professor and Deputy Head of Department, Department of Production Engineering, Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia.
Adding low concentrations of nanosilica to poly(methyl-methacrylate) (PMMA) significantly enhances denture material strength and microhardness. The optimal 0.023% nanosilica content improves mechanical properties without compromising material integrity.
Area of Science:
- Materials Science
- Polymer Science
- Biomaterials Engineering
Background:
- Poly(methyl-methacrylate) (PMMA) is the standard denture base material.
- PMMA exhibits limitations in ductility and strength, impacting denture longevity and function.
Purpose of the Study:
- To enhance the mechanical properties of PMMA for denture applications.
- To investigate the effect of nanosilica addition on PMMA's microhardness and fracture toughness.
Main Methods:
- Incorporation of varying concentrations of nanosilica (0.023% to 0.91% by volume) into PMMA.
- Evaluation of microhardness and fracture toughness using standardized testing procedures.
- Analysis of material properties using differential scanning calorimetry and scanning electron microscopy.
Main Results:
- Optimal enhancement in microhardness and fracture toughness observed at the lowest nanosilica concentration (0.023%).
- Nanosilica addition influenced the glass transition temperature (Tg), with higher concentrations increasing Tg.
- Scanning electron microscopy revealed nanoparticle agglomeration at higher concentrations (0.91%), hindering uniform reinforcement.
Conclusions:
- Low nanosilica content (0.023%) provides superior mechanical properties for PMMA denture bases.
- Nanosilica reinforcement offers a cost-effective method for improving denture material performance.
- Uniform nanoparticle distribution is crucial for achieving optimal mechanical enhancement.
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