Evaluation of the influence of manufacture parameters during organoclay synthesis
Abstract The aim of this study was to evaluate the influences of synthesis parameters on the organophilization of a sodium bentonite clay via interlayer cation exchange by organocations. The parameters analyzed were: stirring time, rest time and surfactant concentration. The novelty of this study, w...
Gespeichert in:
Veröffentlicht in: | Cerâmica 2018-09, Vol.64 (371), p.418-424 |
---|---|
Hauptverfasser: | , , , , , , |
Format: | Magazinearticle |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | Abstract The aim of this study was to evaluate the influences of synthesis parameters on the organophilization of a sodium bentonite clay via interlayer cation exchange by organocations. The parameters analyzed were: stirring time, rest time and surfactant concentration. The novelty of this study, when compared to others reported on the literature data, is the evaluation of different stirring and rest times, which is usually used as 20 min and 24 h, respectively. The organoclays obtained were characterized via X-ray diffraction, Fourier transform infrared spectroscopy and Foster swelling test performed in water and hexane. The results allowed to observe the intercalation of the surfactant between the bentonite layers, the low influence of stirring and resting times on basal interplanar distance, and that the increase of the resting time resulted in higher efficiency on the organophilization process. The Foster swelling test evidenced the organophilic character of the obtained clay.
Resumo O objetivo deste trabalho foi avaliar a influência dos parâmetros de síntese de organofilização de uma bentonita sódica através da reação de troca catiônica. Os parâmetros avaliados foram: tempo de agitação, tempo de repouso e concentração do surfactante. A principal diferença desse estudo para a literatura publicada é o estudo dos tempos de agitação e de repouso. As argilas organofílicas obtidas foram caracterizadas por difração de raios X, espectroscopia de infravermelho com transformada de Fourier e teste de inchamento Foster realizado em água e hexano. Os resultados permitiram observar a intercalação do surfactante entre as camadas de bentonita, a baixa influência dos tempos de agitação e repouso e que o aumento do tempo de repouso gera maior eficiência no processo de organofilização. O teste de inchamento Foster evidenciou o caráter organofílico da argila obtida. |
---|---|
ISSN: | 0366-6913 1678-4553 1678-4553 |
DOI: | 10.1590/0366-69132018643712298 |