Templated pyrolytic carbon: the effect of poly(ethylene glycol) molecular weight on the pore size distribution of poly(furfuryl alcohol)-derived carbon
✍ Scribed by Michael S. Strano; Hans Agarwal; John Pedrick; Dennis Redman; Henry C. Foley
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 609 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0008-6223
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✦ Synopsis
Poly(ethylene glycol), which has a negligible carbon yield upon pyrolysis, was used as a template to study the controlled formation of mesoporosity in pyrolytic carbons. A series of carbons was produced from mixtures of poly(ethylene glycol) and poly(furfuryl alcohol) with 25, 50 and 75% composition by weight and an M of 300 to18 500 g / mol of template. n Polydisperse dextran adsorption reveals a maximum in uptake for 8000 g / mol and 50% templated carbons, while materials from 75% mixtures or those from less than 2000 g / mol template yielded negligible dextran uptake. These results correlated well with the intensity ratio of a broad peak between 7 and 118 2u in the X-ray diffraction spectrum and the 002 diffraction peak and also qualitatively with micrographs of the internal microstructure of the carbons. The results suggest a templating process dominated by both the molecular size of the template and the rate of expulsion of decomposed template material during the formation of the solid.