Synthesis of Novel Dental Nanocomposite Resins by Incorporating Polymerizable, Quaternary Ammonium Silane-Modified Silica Nanoparticles
Autor: | Elisabeth A. Koulaouzidou, Christos Gogos, Dimitris S. Achilias, Alexandros K. Nikolaidis |
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Rok vydání: | 2021 |
Předmět: |
Dental composite
Thermogravimetric analysis Materials science Polymers and Plastics Organic chemistry 02 engineering and technology Article organosilanes 03 medical and health sciences chemistry.chemical_compound QD241-441 0302 clinical medicine stomatognathic system Autoacceleration dental materials quaternary ammonium compounds Fourier transform infrared spectroscopy Curing (chemistry) dental nanocomposite resins Nanocomposite Flexural modulus nanosilica 030206 dentistry General Chemistry 021001 nanoscience & nanotechnology Silane Chemical engineering chemistry 0210 nano-technology |
Zdroj: | Polymers Polymers, Vol 13, Iss 1682, p 1682 (2021) Volume 13 Issue 11 |
ISSN: | 2073-4360 |
Popis: | Diverse approaches dealing with the reinforcement of dental composite resins with quaternary ammonium compounds (QAC) have been previously reported. This work aims to investigate the physicochemical and mechanical performance of dental resins containing silica nanofillers with novel QAC. Different types of quaternary ammonium silane compounds (QASiC) were initially synthesized and characterized with proton nuclear magnetic resonance (1H-NMR) and Fourier transform infrared (FTIR) spectroscopy. Silica nanoparticles were surface modified with the above QASiC and the structure of silanized products (S.QASiC) was confirmed by means of FTIR and thermogravimetric analysis. The obtained S.QASiC were then incorporated into methacrylate based dental resins. Scanning electron microscopy images revealed a satisfactory dispersion of silica nanoclusters for most of the synthesized nanocomposites. Curing kinetics disclosed a rise in both the autoacceleration effect and degree of conversion mainly induced by shorter QASiC molecules. Polymerization shrinkage was found to be influenced by the particular type of S.QASiC. The flexural modulus and strength of composites were increased by 74% and 19%, while their compressive strength enhancement reached up to 19% by adding 22 wt% S.QASiC nanoparticles. These findings might contribute to the proper design of multifunctional dental materials able to meet the contemporary challenges in clinical practice. |
Databáze: | OpenAIRE |
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