| 초록 |
Since Boron nitride nanotube (BNNT) was first synthesized by Chopra et al in 1995, it has gradually attracted interests as a substitute for carbon nanotube (CNT). Even though BNNT possesses impressive thermal and electrical properties, it is still commercially unavailable. Ball milling process as one of strong candidates for a commercial process results in lots of impurities including BN nanoparticles and amorphous materials and milling ball debris and its related compounds from annealing process. Therefore, purification process is prerequisite for applications such as heat dissipative materials. In this study, BNNT was wrapped by various polymers such as amine terminated polyethyleneoxide, hydroxyl polyethylene, and oxidized polyethylene and then dissolved in solvents. Successively surface modified BNNT was purified by centrifugal separation process. Purity of BNNT was verified by Raman spectroscopy and SEM and TEM. |
