Abstract
Native cellulose samples with high crystallinity were pyrolyzed up to above 2000 C and the resulting carbon structures were examined. The drying method for water-swollen or water-suspended cellulose prior to pryrolysis was found to significantly affect preservation of the large surface areas of the original cellulose; i.e., solvent exchange drying (water-ethanol-t-butyl alcohol) of hydrogels and rapid-freeze drying of water suspended particles by spraying onto a cooled copper plate gave surface area of cellulose of 60-120 m2/g, about twice of those by ordinary freeze dyring. The carbons derived from these materials had nearly the same surface area as the starting cellulose and maintained the nanofibrillar morphology.
Original language | English |
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Pages (from-to) | [237]/13-[243]/19 |
Journal | Molecular Crystals and Liquid Crystals |
Volume | 387 |
Issue number | PART 2 |
DOIs | |
State | Published - 2002 |
Event | Proceedings of the First International Symposium on Nanocarbons - Nagano, Japan Duration: 14 Nov 2001 → 16 Nov 2001 |
Keywords
- Cellulose
- Nanofibrillar carbon
- Surface area