Journal of Porous Materials

, Volume 19, Issue 2, pp 189–194 | Cite as

Organic acid catalyzed synthesis of 5-methylresorcinol based organic aerogels in acetonitrile

  • Anna-Liisa Peikolainen
  • Olga Volobujeva
  • Riina Aav
  • Mai Uibu
  • Mihkel Koel


A method of preparing 5-methylresorcinol and formaldehyde based organic aerogels in non-aqueous media with a benzoic acid derivative as a catalyst is being proposed in this paper. Here acetonitrile is used as a solvent that allows direct drying with carbon dioxide over the supercritical state without the need for a solvent exchange. The acidic properties of 2,6-dihydroxy-4-methyl benzoic acid promote the reaction of sol–gel polymerization, and at the same time it takes part in the reaction as a co-monomer and influences the nanostructure of the material. The evolution of the polymer was monitored using nuclear magnetic resonance spectroscopy and the structure of the resulting organic aerogels depending on the molar ratio of 5-methylresorcinol to 2,6-dihydroxy-4-methyl benzoic acid was studied by nitrogen adsorption–desorption measurements, scanning electron microscopy and infrared spectrometry.


Aerogel Organic aerogel 5-methylresorcinol 2,6-dihydroxy-4-methyl benzoic acid Supercritical drying Oil-shale 



The authors would like to thank Tiiu Kailas for the IR spectroscopy measurements, Kristiina Kreek for preparing many samples for the study, Tõnis Pehk and Marina Kudrjašova for the NMR analysis, and Rein Kuusik for fruitful discussions. The financial support of ETF grant 7303 is gratefully acknowledged.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Anna-Liisa Peikolainen
    • 1
  • Olga Volobujeva
    • 2
  • Riina Aav
    • 1
  • Mai Uibu
    • 3
  • Mihkel Koel
    • 1
  1. 1.Department of ChemistryTallinn University of TechnologyTallinnEstonia
  2. 2.Department of Materials ScienceTallinn University of TechnologyTallinnEstonia
  3. 3.Laboratory of Inorganic MaterialsTallinn University of TechnologyTallinnEstonia

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