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

0348835 - ÚFCH JH 2011 RIV US eng J - Journal Article
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
Institutional research plan: CEZ:AV0Z40400503
Keywords : chemical interactions * FTIR * physical chemistry
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 4.269, year: 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.
Permanent Link: http://hdl.handle.net/11104/0006059