Magnetic induction represents a highly useful means of achieving rapid heat transfer without the need for physical connections. In polymer nanocomposites with magnetic nanoparticles, exposure to high-frequency alternating current may be utilized to induce a significant amount of heating, with the spatial distribution of heating controlled by the distribution of nanoparticles. Although these methods have proven useful for initiating chemical cure reactions in thermally polymerized networks, the introduction of metals such as iron and cobalt in magnetic nanoparticles often results in significant decreases in the thermo-chemical stability of the networks. We present a method for overcoming these difficulties by first coating the magnetic nanoparticles with a nanoscopic layer of silica. The surface functionality of the silica may then be controlled to provide compatibility with the polymer network, while isolating it from the damaging effects of undesirable metals. The method has been used successfully to prepare polycyanurate networks reinforced with silica-coated nanoparticles.

New methods for curing thermally stable polycyanurate networks based on magnetic induction heating of coated nanoparticles

249th National Meeting (2015)

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