Investigation of Entropic Packing Effect of Ternary Suspended NOHM on Thermal Properties and Swelling behavior via Thermal and Spectroscopic Analyses

Abstract

Nanoparticle Organic Hybrid Material (NOHM) is a new green platform material which is self–suspended liquid–like material consisted of inorganic core and organic canopy. This new platform, NOHM, has been evaluated to have high potential for various energy and environmental applications such as CO2 sorptive materials, electrolytes, and lubricants with a low vapor pressure and promising thermal stability at high temperature over 200 °C. More importantly, NOHM has a great tunability on both entropic and enthalpic designs by introducing tailored core and linkage with specific functionalities. In particular, the entropic property which related to the intramolecular interactions between core and canopy structure could influence on the system's thermal, chemical, and electrical properties. In this investigation, it was designed to evaluate the entropic packing effects of NOHM systems on thermal properties and swelling behavior. The four different NOHM systems with varying the core size and the suspension system were synthesized (single 7, 12, 22 nm suspension and ternary suspension) and their thermal properties and swelling patterns were investigated via thermal analysis and spectroscopic analyses including ATR FT-IR and DOSY NMR. Through the investigation, the entropic packing effects by core size were identified. In addition, the ternary suspended NOHM system were evaluated to have high potential for thermal fluid application.