Počet záznamů: 1

Chemical Interactions of Surface-Active Agents with Growing Resorcinol-Formaldehyde Gels

  1. 1.
    0348835 - UFCH-W 2011 RIV US eng J - Článek v odborném periodiku
    Jirglová, Hana - Maldonato-Hódar, F. J.
    Chemical Interactions of Surface-Active Agents with Growing Resorcinol-Formaldehyde Gels.
    Langmuir. Roč. 26, č. 20 (2010), s. 16103-16109 ISSN 0743-7463
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: chemical interactions * FTIR * physical chemistry
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 4.269, rok: 2010

    The influence of cationic, anionic, and nonionic surfactants (S) on the characteristics of carbon xerogels was analyzed. The polymerization of resorcinol (R) and formaldehyde (F) was developed in an aqueous solution of S without any additional catalyst. The gels obtained were dried in air to obtain organic xerogels and then carbonized to carbon xerogels. The prepared samples were characterized by FTIR, TG, SEM, and N-2 and CO2 adsorption. The formation of RF-S copolymers was observed for cationic and nonionic surfactants, but this was not observed for anionic S, probably because of repulsive electrostatic interactions between the two organic phases. Nevertheless, anionic S leads to a greater morphological transformation with the formation of nonporous needle particles associated with the higher pH induced by this S. Carbon xerogels are microporous materials with interesting molecular sieve behavior.
    Trvalý link: http://hdl.handle.net/11104/0006059