Dispersing Carbon Nanotubes in Laponite Films and Hydrogels

Carbon nanotubes (CNTs) have many interesting properties (fast electron transport, ease of functionalization, and high tensile strength) that make them attractive for commercial applications in sensors, integrated circuits, and solar cells. We are currently exploring the interactions between CNTs and Laponite, a synthetic clay that directs self-assembly to realize novel nanocomposites. Carboxylic acid functionalized and nonfunctionalized multi-walled carbon nanotubes were included within Laponite films and hydrogels at varied weight percent loadings. Structural and compositional studies of the Laponite/CNT nanomaterials were completed using optical and infrared spectroscopy, scanning electron microscopy, atomic force microscopy and powder X-ray diffraction. Microscopy data indicated varied polydispersities with optimal dispersion of CNTs at lower CNT loadings. By improving dispersion and studying green routes for synthesis using water-based methods, we hope to improve the viability of these nanocomposites for clean energy applications.