Manufacturing industrial-volume composites with well controlled uniform dispersion can be challenging, and is especially true for high performance polymers, such as polyetherimide (PEI). Toward that end, we report here a simple and versatile 2-Step processing approach which is based on formation of a high concentration of multi-walled carbon nanotube (MWCNT) filled PEI, which we call "Solid Nano-Nectar" (SNN). In this study we found surprisingly strong influences of the solvents that were used in the SNN preparation for dispersion of MWCNTs on the properties of the composites. The thermal conductivity of the SNN (made using DMF solvent) incorporated composites was about 72% higher than pure PEI, and 50% higher than that from 1-Step processing at same loading of 0.5 wt%. The thermal stability increased by 13 °C from this composite prepared by 1-Step processing, but a more noticeable change in thermal stability of 33 °C was observed at same loading using the 2-Step process. Such improvement was also observed in dynamic mechanical properties.
Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.