Abstract
In this study, imidazole supported silica nanoparticle (ISS) was prepared from Tetraethyl orthosilicate (TEOS) precursor via co-condensation method. To warrant the chemical linkage of imidazole group to the silica surface, different spectroscopic characterization was performed. The microscopic investigation under TEM elucidates GMS/ISS particle size compared to as synthesized nanosilica (nS), which also endorses their surface modification. Further, ISS (0–3 wt %) was used to prepare epoxy nanocomposites. The ISS/EP enhances the tensile strength as well as the tensile modulus by ∼45% (84 MPa) and ∼36% (1.37 GPa) with respect to the neat epoxy (58 MPa and 1 GPa) respectively. Herein, the ISS nanoparticle uplifts the tensile performance of the epoxy nanocomposites at lower (1 wt %) filler content. To verify this result, further the dispersion study of ISS in epoxy system under TEM study was performed. A homogeneous distribution is observed at 1 wt % of ISS nanoparticles. In addition to that, Composites embedded with 1 wt % of ISS showed significant enhancement in toughness without sacrificing their stiffness properties. This noticeable improvement offered by ISS opens up the scope to use theses one-pot synthesized nanoparticles as toughness enhancer for highly brittle epoxy systems.
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