Abstract
Multi-wall carbon nanotubes (CNTs) with diameters between 10 nm and 20 nm were prepared by melt spinning, stabilizing and carbonizing of fine core/shell-1/shell-2 polymer microspheres. Microspheres were synthesized by three-steps soap free emulsion polymerization of methylmetacrylale (MMA) and acrylonitrile (AN) using potassium persulfate (KPS) as a polymerization radical initiator. The final composition of microspheres was PMMA core/PAN shell-1/PMMA shell-2 and diameter ca. 500nm. The outer PMMA layer played the role of a matrix polymer. Microspheres were directly melt spun at ca. 300°C followed by stabilization of PAN at 220°C in oxygen and carbonization at 100°C in nitrogen. TG-DTA study was used for clarifying the PAN thermal behavior during CNTs synthesis. SEM, TEM and HRTEM were used in characterizing the microspheres and CNTs morphology.
Original language | English |
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Journal | Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals |
Volume | 387 |
Issue number | PART 2 |
DOIs | |
Publication status | Published - 2002 Dec 1 |
Event | Proceedings of the First International Symposium on Nanocarbons - Nagano, Japan Duration: 2001 Nov 14 → 2001 Nov 16 |
Keywords
- Carbon nanotubes
- Core/shell microspheres
- Melt spinning
- Soap-free emulsion polymerization
ASJC Scopus subject areas
- Condensed Matter Physics