Sol–gel template preparation of alumina nanofillers for reinforcing the epoxy resin

Abstract

Alumina nanofibers were prepared by sol-gel template method. Carbon nanofibers (CNFs) of feather-like morphology obtained by chemical vapor deposition of C 2 -C 4 hydrocarbons mixture have been used as a template. The distinctive feature of CNF is a friable disordered structure consisting of separate fragments of graphite-like phase. To simplify the sol-gel synthetic procedure, the impact of preparative conditions such as type of precursor and ratio of starting components was studied. CNFs were coated with corresponding alumina precursor and subjected to a high temperature treatment. The resulted alumina nanofibers were explored by means of scanning electron microscopy (SEM), physical nitrogen adsorption (BET), and X-ray diffraction. The optimal Al 2 O 3 :CNF ratio was found to be 1:6. According to SEM and BET, surface area of prepared alumina fibers 70-90 nm in diameter lies in a range of 149-174 m 2 /g. The thermal and strength properties of epoxy composites reinforced with alumina nanofibers are compared. It was demonstrated that used nanofillers affect noticeably the properties of the epoxy matrix. Graphical Abstract

Nonlinear Conductivity and Thermal Stability of Anti-Corona Epoxy Resin Nanocomposites

“…The performance of a composite dielectric can be significantly influenced by the incorporation of nanoparticles into epoxy resin, as indicated by several scientific studies. Alumina nanofibers were successfully synthesized via the sol-gel template method by Pavel V. Krivoshapkin et al, and incorporating them into epoxy composites led to significant enhancements in both thermal stability and mechanical strength properties [19]. Pan Hu et al successfully functionalized the surface of nano TiO2 by grafting a silane coupling agent, KH570, onto its hydroxyl groups, resulting in the preparation of an epoxy resin nanocomposite material.…”

Effect of Al2O3 nanofillers in basalt/epoxy composites: Mechanical and tribological properties

“…It is observed that the addition of fillers improves the tribological properties. Krivoshapkin et al [ 39 ] explored the reinforcing effect of alumina nanofibers on the epoxy matrix and found that, increase in mechanical strength of the epoxy composite filled with optimal content of 1% alumina nanofibers. Niaki el al.…”