Investigation on carbon nanomaterials: Coaxial CNT-cylinders and CNT-polymer composite

[摘要] The macroscopic coaxial carbon cylinders (dia. ∼ 0.5 cm with varying lengths, ∼ 7â€�??10 cm) consisting of aligned carbon nanotube (CNT) stacks have been prepared by controlled spray pyrolysis method. The coaxial carbon cylinders of CNT stacks have been formed directly inside the quartz tube. Another study is done on multi-walled CNTs (MWNTs)â€�?�polymer (e.g. polyethylene oxide (PEO), polyacrylamide (PAM)) composite films. We have investigated the structural, electrical and mechanical properties of MWNTsâ€�?�PEO composites. Composites with different wt% (between 0 and 50 wt% of MWNTs) have been prepared and characterized by the scanning electron microscopic technique. Enhanced electrical conductivity and mechanical strength were observed for the MWNTsâ€�?�PEO composites. We have also studied the electrical property of MWNTsâ€�?�PAM composite films.

[学科分类] 材料工程

[关键词] Coaxial carbon cylinders;polyethylene oxide;electrical conductivity;mechanical properties.