The Viscosity of Organic Liquid Suspensions of Trimethyldococylammonium-Montmorillonite Complexes
| العنوان: | The Viscosity of Organic Liquid Suspensions of Trimethyldococylammonium-Montmorillonite Complexes |
|---|---|
| المؤلفون: | Makoto Minase, Katsuyuki Kawamura, Mitsuji Kondo, Masanobu Onikata |
| المصدر: | Clays and Clay Minerals. 56:49-65 |
| بيانات النشر: | Springer Science and Business Media LLC, 2008. |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | Relative Sediment Volume, Stoichiometry, Structure, Analytical chemistry, Soil Science, FTIR Absorption Spectra, chemistry.chemical_compound, symbols.namesake, Geochemistry and Petrology, Earth and Planetary Sciences (miscellaneous), Cation-exchange capacity, XRD 00l Reflection, Organoclay, Organic chemistry, Specific Plastic Viscosity, Organophilic Bentonite, Alkyl, Water Science and Technology, chemistry.chemical_classification, Trimethyldococylammonium, Specific Gel Volume, Particle Morphology, Hydrocarbon, Montmorillonite, chemistry, Bentonite, symbols, van der Waals force, Clay minerals |
| الوصف: | An organophilic bentonite was prepared by means of a reaction of natural Na-montmorillonite with trimethyldococylammonium which has an especially long n-alkyl chain. The addition of trimethyldococylammonium to montmorillonite was in the range 0.25–3.0 times the cation exchange capacity (CEC) of the clay (i.e. 0.23–2.82 mmol/g clay). The particle morphology in organic liquid suspensions of organoclay complexes was studied by measuring the viscosity based on Eyring’s rate process and Robinson’s relative sediment volume. In toluene, montmorillonite with 1.17 mmol/g clay trimethyldococylammonium (1.25 times the CEC) had the largest specific gel volume, relative sediment volume, and K-factor. The results of the stoichiometry for trimethyldococylammonium-montmorillonite show that practically all of the quaternary ammonium was adsorbed to montmorillonite. Maximum half widths of 001 reflections from X-ray diffraction patterns were obtained in the range 0.74–1.17 mmol/g clay, indicating a disordered arrangement of the organic cation molecules intercalated between the layers. Appreciable shifts to lower-frequency regions in the Fourier transform infrared absorption spectra as a result of CH2-stretching vibrations were observed with increasing amounts of the organic cation. When increasing the amount of organic cation added to the clay from 0.94 to 1.41 mmol/g clay, a large shift occurred to the lower-frequency side, approaching the frequency of the organic cation alone. This indicates that the interaction between adjacent hydrocarbon chains becomes progressively stronger, due to van der Waals attraction, with increases in the amount of organic cation. Interactions of the alkyl chains in trimethyldococylammonium-montmorillonite complexes with irregularly distributed and randomly arranged alkyl chains between the silicate layers were weak, and, as a result, solvation with external organic liquids occurred and gel formation developed through macroscopic swelling of the organoclay. |
| وصف الملف: | application/pdf |
| تدمد: | 1552-8367 0009-8604 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcdf57742b1f88c051d3627e03a141b9 https://doi.org/10.1346/ccmn.2008.0560105 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....fcdf57742b1f88c051d3627e03a141b9 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15528367 00098604 |
|---|