| 초록 |
Graphene has been recently introduced as a new conductive nano-sized filler, but relatively little work has examined the preparation of polymer nanocomposites using conventional processing techniques. The purpose of this study was to prepare graphene-thermoset polymer(epoxy, unsaturated polyester) nanocomposites using three-roll milling (or calendaring) and investigate the effect of material and processing parameters, namely, matrix type, filler content, roll speeds, and number of passes (at a fixed roll gap) on the properties and morphologies of nanocomposites. Commercially available graphene was used, which was prepared by complete oxidation of pristine graphite followed by ultrasonication-induced exfoliation and thermal shock reduction. Graphene-polymer nanocomposites were cast into films and characterized through TEM, FE-SEM, electrical resistivity measurement, and dynamic mechanical analysis. Optimal graphene nanocomposite processing guidelines are suggested. |
