Abstract
Surface-modified silica nanoparticles are available as concentrates in epoxy resins in industrial quantities for nearly 20 years. Meanwhile, they are used in many epoxy resin formulations for various applications like fiber-reinforced composites, adhesives or electronic components; even in space vehicles like satellites. Some of the drawbacks of “classic” epoxy toughening using elastomers as a second phase, like lower modulus or a loss in strength can be compensated by using nanosilica together with such tougheners. Apparently, there exists a synergy as toughness and fatigue performance are increased significantly. This work intends to provide an overview regarding the possibilities of nanotoughening with silica, the industrial applications of such epoxy resin formulations and the most recent research results.
Highlights
For many years epoxy resins are used in a continuously growing variety of industrial applications.From aircraft components to high-performance automotive adhesives, from rotor blades for wind energy installations to heavy-duty coatings for the marine industry
Very extensive review covering both crystalline and amorphous silica nanoparticles done published by Fruijtier-Poelloth, came to the conclusion that silica nanoparticles have no was different by Hoetthan et al larger
Zappalorto et al used as a multiscale system for the assessment of the fracture toughness of nanosilica in epoxy resins and found good agreement between the predictions of the model and the experimental data provided by testing an amine-cured diglycidyl ether of bisphenol A (DGEBA) [31]
Summary
For many years epoxy resins are used in a continuously growing variety of industrial applications. The researchers cited in this work have been using commercially available 40 wt % concentrated masterbatches of surface-modified silica nanoparticles in various epoxy resins. Being spherical,cited theyin dothis notwork exhibit any thixotropic properties, available as larger, branched structures masterbatches of surface-modified silica nanoparticles in various epoxy resins. %, they do increase the resin viscosity only why nanosilica inhandled a pure form, as powder, became noascommercial for4.epoxy resins Being spherical, they do not exhibit any thixotropic properties, as larger, branched structures of silica typically do. Nanosilica content using different nanosilica concentrates [4]
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