Influence of surfactants on porous properties of carbon cryogels prepared by sol-gel polycondensation of resorcinol and formaldehyde

N. Tonanon, W. Tanthapanichakoon, T. Yamamoto, H. Nishihara, S. R. Mukai, H. Tamon

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

The role of surfactants on carbon cryogels is investigated by using three different surfactants, nonionic (SPAN80), cationic (trimethylstearylammonium chloride; C18) and nonionic polymeric fluorinated (FC4430) surfactants. By using different SPAN80 concentrations (10.0, 5.0, 2.5, 1.0 and 0.5 vol.%), double-structure carbon microspheres with SBET (630-700 m 2/g) and Vmes (0.51-0.93 cm3/g) are obtained. Mesoporous carbon cryogels with different SBET and Vmes are prepared by using C18 with different volume ratios of cyclohexane to water in a C18/water/cyclohexane mixture. Carbon cryogels with SBET (690-810 m2/g) and Vmes (0.83-1.74 cm3/g) are obtained when cyclohexane is contained in the mixture, on the contrary, when there is no cyclohexane in the mixture, a water-based carbon cryogel with low SBET (480 m2/g) and Vmes (0.29 cm 3/g) is obtained. Carbon cryogels prepared by using C18 have larger mesopore size and broader mesopore size distribution compared with carbon cryogels prepared by using other surfactants. Microcellular (sponge-like) carbon cryogels with mesoporous surface, SBET (210-660 m 2/g) and Vmes (0.37-0.92 cm3/g), are obtained by introducing FC4430 (two concentrations) to two starting RF solutions (C/W=6,45). Low FC4430 concentration leads to carbon cryogels with higher S BET (610 and 660 m2/g) and narrower mesopore size distributions compared to the high concentration counterpart. Hence, it is found that different surfactant types have interesting effects on morphologies and porous properties of RF carbon cryogels.

Original languageEnglish
Pages (from-to)2981-2990
Number of pages10
JournalCarbon
Volume41
Issue number15
DOIs
Publication statusPublished - 2003
Externally publishedYes

Keywords

  • A. Porous carbon
  • B. Pyrolysis
  • C. Adsorption
  • D. Porosity
  • Scanning electron microscopy

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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