|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||2018 Technical Division Student Poster Competition
||SPG-13: Oxidative Unzipping and Transformation of High Aspect Ratio Boron Nitride Nanotubes into White Graphene Oxide Platelets
||Pranjal Nautiyal, Archana Loganathan, Richa Agrawal, Benjamin Boesl, Chunlei Wang, Arvind Agarwal
|On-Site Speaker (Planned)
Boron Nitride Nanotube (BNNT) is a one-dimensional nanomaterial known to exhibit superior thermal stability, making high temperature applications and processing of BNNT based advanced materials possible. However, there is very little understanding of physical and chemical transformations that BNNT undergoes at elevated temperatures. In this study, high temperature atmospheric oxidation behavior of ultra-long and fine BNNT is investigated by Thermogravimetric Analysis and Differential Scanning Calorimetry. Oxidation of BNNT to form B2O3 is found to initiate at ~750°C. This is accompanied with O2 induced cleavage and unzipping of BNNTs. The unwrapped BNNTs were found to coalescence to form stacks of 2D platelets. FTIR and EDS analysis suggests these 2D structures to be Boron Nitride Oxide platelets, with analogous structure to Graphene Oxide. Therefore we term them as White Graphene Oxide (WGO). This is the first report on high temperature transformation of BNNT bundle to a continuous array of WGO nanoplatelet stacks.