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Chemical Interactions of Surface-Active Agents with Growing Resorcinol-Formaldehyde Gels
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SYSNO ASEP 0348835 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Chemical Interactions of Surface-Active Agents with Growing Resorcinol-Formaldehyde Gels Author(s) Jirglová, Hana (UFCH-W) RID, ORCID
Maldonato-Hódar, F. J. (ES)Source Title Langmuir. - : American Chemical Society - ISSN 0743-7463
Roč. 26, č. 20 (2010), s. 16103-16109Number of pages 7 s. Language eng - English Country US - United States Keywords chemical interactions ; FTIR ; physical chemistry Subject RIV CF - Physical ; Theoretical Chemistry CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000282936700055 DOI 10.1021/la102499h Annotation 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. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2011
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