Epoxy silica nanocomposites

Epoxy–Amine Based Nanocomposites Reinforced by Silica Nanoparticles

Thermokinetic Group,Laboratory of Chemistry of Organic and Metallic Materials CMOM,University of Nice−Sophia Antipolis,Parc Valrose,06108 Nice Cedex 2,France

J. Phys. Chem. C,2011,115 (46),pp 5

DOI: 10.1021/jp2066259

Section:

Abstract

In general,the incorporation of nanoparticles into polymers shows an increase of the materials performances,but the effect of the nanosized objects is still not well understood. In this study,we have investigated the impact of incorporation of silica nanoparticles in an epoxy/amine (DGEBA/PDA) system. Naked silica nanoparticles (SiNP) were synthesized via a sol–gel technique. To evaluate the interfacial effect on properties of nanocomposites,the surface of the nanoparticles was modified by substituting silanol groups into epoxide functions (SiNPEp). A new method was elaborated for obtaining different organic–inorganic nanocomposites with a very good dispersion without any aggregation according to transmission electron microscopy (TEM) analyses. The influence of the different silica nanoparticles (SiNP or SiNPEp) on the mechanisms of the reaction between epoxy and amine groups is highlighted. Important new inputs on the cure kinetics of the epoxy/amine mixture are given. The glass transition temperatures and thermal properties of nanocomposites have been examined,and relationships have been established.

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Easy Adoption
The simple, low-cost fabrication technique was designed to be easily scaled up and compatible with existing battery manufacturing. Once fabricated, the nanocomposite anodes would be used in batteries just like conventional graphite structures. That would allow battery manufacturers to adopt the new anode material without making dramatic changes in production processes.
And because the final composite spheres are relatively large when they are fabricated into anodes, the self-assembly technique avoids the potential health risks of handling nanoscale powders

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Thermal Degradation of Polymer Blends, Composites, and Nanocomposites (Engineering Materials)
Book (Springer-Verlag)
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