Influence of hematite nanorods on the mechanical properties of epoxy resin

Abstract

The mechanical properties of nanocomposites obtained by incorporation of fairly uniform hematite nanorods (α-Fe 2 O 3 NRs) into epoxy resin were studied as a function of the content of the inorganic phase. A thorough microstructural characterization of the α-Fe 2 O 3 NRs and the nanocomposites was performed using transmission electron microscopy (TEM) and atomic force microscopy (AFM). The TEM measurements revealed rod-like morphology of the nanofiller with a uniform size distribution (8.5 nm×170 nm, dia-meter×length). High-magnification TEM and AFM measurements indicated agglomeration of α-Fe 2 O 3 NRs embedded in the epoxy resin. Stress at break, strain at break, elastic modulus and tensile toughness of the nanocomposites were compared with the data obtained for pure epoxy resin. Significant influence of nanofiller on the mechanical properties of epoxy resin, as well as on the glass transition temperature, could be noticed for samples with low contents of the inorganic phase (up to 1 wt. %).

Temperature effects on structural integrity of fiber‐reinforced polymer matrix composites: A review

“…Bogdanovic et al . determined the effect of α‐Fe 2 O 3 on epoxy resin by DSC . Except for the sample with the highest content of α‐Fe 2 O 3 nanorods (NRs) (1.0 wt %), all the other composite samples had a lower T g than that of the pure epoxy resin, as shown in Figure .…”

Polymer Composites of Low-Density Polyethylene (LDPE) with Elongated Hematite (α-Fe2O3) Particles of Different Shapes

“…It can be observed that the weakest increase in tensile strength is observed for the samples LDPE/0.5%HR1 and LDPE/1%HR1 due to the use of rod-shaped hematite particles, which show the highest tendency to agglomerate when used in higher content because of their specific geometry and the ability to aggregate. It is known that there is a tendency for rod-like filler nanoparticles to form agglomerates in the surrounding media, which limits the use of such 1D nanofiller types for the reinforcement of polymers [30]. Bogdanović et al [30] showed that hematite nanofiller has an influence on the improvement of the mechanical properties of an epoxy polymer matrix when the composites are prepared with low filler content (up to 1 wt.%).…”

“…It is known that there is a tendency for rod-like filler nanoparticles to form agglomerates in the surrounding media, which limits the use of such 1D nanofiller types for the reinforcement of polymers [30]. Bogdanović et al [30] showed that hematite nanofiller has an influence on the improvement of the mechanical properties of an epoxy polymer matrix when the composites are prepared with low filler content (up to 1 wt.%). There is a possibility for the agglomeration of filler particles in the polymer matrix when the filler content exceeds a certain value, which influences the decrease in the mechanical properties [31].…”

“…Rod-shaped hematite particles (R1) also show the influence on the improvement of the polymer composite's thermal stability but with less impact, due to their tendency to agglomerate in a polymer matrix [30]. They are long and straight particles with the highest tendency to agglomerate.…”

Investigating The Effect of Magnetite (Fe3O4) Nanoparticles on Mechanical Properties of Epoxy Resin

“…The interesting characteristics of epoxy include low shrinking after cure, good adhesion to different substrates, great stiffness, low creep, chemical and thermal resistance, low cost and high significance of hardness and strength. Epoxy resins exhibit some advantages in mechanical properties [9][10][11][12][13]. These excellent properties make epoxy resin a selection resin for many high-performing engineering applications [14].…”