Nanomaterials with high aspect ratio and high surface/volume ratio advantage as nanofiller materials impart very different viscoelastic behavior compared to traditional solids and filler compositions in fluids. Shear stress and other rheological measurements can reveal orders of magnitude change as a function of 0.01 to 1.0 % percolation thresholds. This talk will focus on the interesting fluid and coating properties of graphene oxide (GO) and molybdenum disulfide (MOS2) dispersions. The synthesis and preparation from a variety of interacalative oxidative and exfoliation methods is reported with focus on dispersity and functional group control resulting in modifiable nanoparticles. The nanoparticles can be modified using grafting chemistry and their swelling and stabiliy properties reported. In particular, PEGylation and hyperbranched grafting methods is possible. Interesting rheological behavior can be observed with grafted vs mixed systems in terms of stability and swelling behavior. It is of high interest for possible applications in coatings, additives, and incorportation in drilling fluids.

Grafted graphene oxide (GO) and molybdenum disulfide (MOS2) nanoparticle dispersions

248th National Meeting (2014)

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