Study of rate dependent behavior of glass/epoxy composites with nanofillers using non-contact strain measurement

Gurusideswar, S.; Ramachandran, V.; Gupta, Neelam

doi:10.1016/j.ijimpeng.2017.05.013

Cited by 27 publications

(11 citation statements)

References 39 publications

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“…The exfoliation mechanism of the dispersion should occur when the d-spacing is higher than 10 nm [ 29 ]. The d-spacing for 5 wt.% nanosilica incorporated in the epoxy matrix increased from 4.52 to 5.31 Å, confirming that dispersion occurred via the intercalation mechanism, as reported by Gurusideswar et al [ 30 ]. However, no substantial changes in the d-spacing of the ZnO nanoparticles were observed after dispersion in the epoxy coating matrix at various concentrations.…”

Section: Resultssupporting

confidence: 82%

Effects of SiO2 and ZnO Nanoparticles on Epoxy Coatings and Its Performance Investigation Using Thermal and Nanoindentation Technique

et al. 2021

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Synergistic formulations were developed with nano-pigments, and their effects on the mechanical properties on steel substrates and structures were evaluated. This paper provides a complete analysis of the epoxy coating, focusing on the incorporation of nano-pigments and their synergistic effects in obtaining higher mechanical properties. This study reports the preparation of epoxy nano-silica composites, their characterization, and the development of coatings based on nano-silica and ZnO particles. In this composite, epoxy resin was incorporated with SiO2 as the main pigment and ZnO as a synergistic pigment to achieve high-performance epoxy coatings for multiple applications. The mechanical properties of these coatings (ESZ1–ESZ3) were evaluated by nanoindentation, and were used to measure the enhanced durability of nanocomposite coatings developed with synergistic formulations with different types of nanoparticles. Their performance was evaluated before and after exposure to a 3.5% NaCl solution to examine the changes of hardness and elastic modulus. The results showed that the nanoindentation technique, in conjunction with Fourier transform infrared spectroscopy and X-ray diffraction, could examine the durability and predict the service life of nanocomposite coatings. A correlation was observed between the modulus and hardness before and after exposing epoxy composite coatings (ESZ1–ESZ3) to a 3.5% NaCl solution.

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Section: Resultssupporting

confidence: 82%

Effects of SiO2 and ZnO Nanoparticles on Epoxy Coatings and Its Performance Investigation Using Thermal and Nanoindentation Technique

et al. 2021

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“…Dispersion by exfoliation occurs when the d-spacing is higher than 10 nm [ 23 ]. The d-spacing for 5 wt.% nanosilica dispersed in the epoxy matrix was found to significantly increase from 4.52 Å to 5.31 Å, which ensures the dispersion of the nanosilica in the epoxy matrix via intercalation mechanism as reported by Gurusideswar et al [ 24 ]. In contrast, the d-spacing of the ZnO crystal layers was not significantly changed by incorporation into the epoxy coating matrix, or by increasing the ZnO concentration in the epoxy coating matrix.…”

Section: Resultssupporting

confidence: 54%

Effect of Incorporated ZnO Nanoparticles on the Corrosion Performance of SiO2 Nanoparticle-Based Mechanically Robust Epoxy Coatings

et al. 2020

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This paper presents the studies of the development of a high-performance epoxy coating for steel substrates. To this end, it investigated the synergistic effect of incorporating zinc oxide (ZnO) nanoparticles into nanosilica containing epoxy formulations. The mechanical properties of the epoxy coating formulations were improved by modifying the surfaces of the silica nanoparticles (5 wt.%) with 3-glycidoxypropyl trimethoxysilane, which ensured their dispersal through the material. Next, the ZnO nanoparticles (1, 2, or 3 wt.%) were incorporated to improve the corrosion performance of the formulations. The anticorrosive properties of the coatings were examined by electrochemical impedance spectroscopy (EIS) of coated mild steel specimens immersed in 3.5% NaCl solution over different time intervals (1 h to 30 days). Incorporation of the ZnO nanoparticles and the nanosilica into the coating formulation improved the corrosion resistance of the epoxy coating even after long-term exposure to saline test solutions. Finally, to evaluate how the nanoparticles affected the chemical and morphological properties of the prepared coatings, the coatings were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD).

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“…The d-spacing of nanosilica reinforced composite laminates is noticed significantly increased from 4.27 Å to 4.76 Å for 0.75 wt% filler reinforced composite as compared to other weight fractions. This ensured enhanced dispersion of nanosilica in epoxy and an intercalated structure as reported by [36]. Very weak peaks were recorded in the case of 1 wt% of nanosilica due to the exfoliated structure.…”

Section: Resultsmentioning

confidence: 55%

Assessments of Secondary Reinforcement of Epoxy Matrix-Glass Fibre Composite Laminates through Nanosilica (SiO2)

Lazar¹,

Sengottuvelu²,

Natarajan

2018

Materials

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The principal objective of this research work was to investigate the results of impregnating epoxy matrix-glass fibre composite laminates with nanosilica as secondary reinforcement. 0.5, 0.75, 1 and 3 wt% nanosilica was used and thereafter properties of composites were assessed through tensile, three point bending, quasi static indentation tests and dynamic mechanical analysis. Scanning electron microscope examinations were done on fracture surfaces and failure modes were analyzed. The internal failures of the composite due to quasi-static indentation were evaluated through C-Scan. Among samples of different weight fractions, 0.75 wt% nanosilica reinforced composite laminates exhibited substantial increase of 42% in tensile strength and 39.46% in flexural strength. The reduction in glass transition temperature (Tg), increase in storage modulus (E′), loss modulus (E″) and damping factor (tan δ) were also observed. Quasi-static indentation assessments revealed that energy absorption property was enhanced significantly by 53.97%. Hence nanosilica up to 0.75 wt% can be used as a potential candidate for secondary reinforcement in epoxy composite laminates.

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Study of rate dependent behavior of glass/epoxy composites with nanofillers using non-contact strain measurement

Cited by 27 publications

References 39 publications

Effects of SiO2 and ZnO Nanoparticles on Epoxy Coatings and Its Performance Investigation Using Thermal and Nanoindentation Technique

Effects of SiO2 and ZnO Nanoparticles on Epoxy Coatings and Its Performance Investigation Using Thermal and Nanoindentation Technique

Effect of Incorporated ZnO Nanoparticles on the Corrosion Performance of SiO2 Nanoparticle-Based Mechanically Robust Epoxy Coatings

Assessments of Secondary Reinforcement of Epoxy Matrix-Glass Fibre Composite Laminates through Nanosilica (SiO2)

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