Publications by Year: 2017

Prud’homme, R. K. ; Aksay, I. A. Conductive circuit containing a polymer composition containing thermally exfoliated graphite oxide and method of making the same, 2017.Abstract
A conductive circuit containing a polymer composite, which contains at least one polymer and a modified graphite oxide material, containing thermally exfoliated graphite oxide having a surface area of from about 300 m2/g to 2600 m2/g, and a method of making the same.
Aksay, I. A. ; Milius, D. L. ; Korkut, S. ; Prud'homme, R. K. Functionalized Graphene Sheets having High Carbon to Oxygen Ratios, 2017.Abstract
The present invention relates to functionalized graphene sheets having low oxygen content and methods for their prepartion.
Alifierakis, M. ; Sallah, K. S. ; Aksay, I. A. ; Prevost, J. H. Reversible Cluster Aggregation and Growth Model for Graphene Suspensions. AIChE Journal 2017, 63, 5462-5473.Abstract
We present a reversible cluster aggregation model for 2-D macromolecules represented by line segments in 2-D; and, we use it to describe the aggregation process of functionalized graphene particles in an aqueous SDS surfactant solution. The model produces clusters with similar sizes and structures as a function of SDS concentration in agreement with experiments and predicts the existence of a critical surfactant concentration (C-crit) beyond which thermodynamically stable graphene suspensions form. Around C-crit, particles form dense clusters rapidly and sediment. At C << C-crit, a contiguous ramified network of graphene gel forms which also densifies, but at a slower rate, and sediments with time. The deaggregation-reaggregation mechanism of our model captures the restructuring of the large aggregates towards a graphite-like structure for the low SDS concentrations. (C) 2017 American Institute of Chemical Engineers