| 초록 |
In this study, we synthesized silica coated MWNTs composite by surface oxidation of MNWTs using a phase transfer catalyst in the presence of KMnO4 and followed by two ways. The one is the grafting of 2-AEAPS (2-aminoethyl 3-aminopropyl trimethoxysilane) and the other is the grafting of P4VP (poly4-vinylpyridine) by surface initiated polymerization. The grafted AEAPS and P4VP on MWNTs can activate a silica synthesis process by an acid-base interaction. Stöber method was employed as a synthetic method for silica. The composite material was characterized using XRD, TGA, SEM, TEM, and EDS. The synthesized silica forms a uniform layer on MWNTs with a controllable thickness in nanometer scale. The silica coated CNTs composite is focused recently because they are useful for the advancement of nanoscale sensors and electric devices as well as for optical, magnetic, catalytic applications. Specifically they can promote compatibility with existing silicon based technology. |
