Journal
ULTRASONICS SONOCHEMISTRY
Volume 40, Issue -, Pages 861-873Publisher
ELSEVIER
DOI: 10.1016/j.ultsonch.2017.07.040
Keywords
Composite materials; Fracture mechanics; Mechanical properties; Nanoparticle dispersion; Physical properties
Categories
Funding
- Council of Scientific & Industrial Research (CSIR) of India
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Optimized ultrasonic assisted dispersion of un-functionalized titanium dioxide (TiO2) nanoparticles (0.5-20 wt %) into epoxy resin is reported. The investigation shows that there is a direct relation among nanoparticles content, inter-particle spacing and cluster size of the particles on the glass transition temperature (T-g) and tensile properties of the prepared nanocomposites. A significant improvement in tensile strength and modulus with minimal detrimental effect on the toughness was observed for the prepared composites, where compared to pristine epoxy resins, about 26% and 18% improvement in tensile strength and strain-to-break %, respectively, was observed for 10 wt% particles loading, whereas a maximum improvement of about 54% for tensile toughness was observed for 5 wt% particles loaded resins. The investigations found that a strong particle matrix interface results in the enhancement of the mechanical properties due to leading toughening mechanisms such as crack deflection, particle pull out and plastic deformation.
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