Arrangement, conformation, and mobility of surfactant molecules intercalated in montmorillonite prepared at different pillaring reagent concentrations as studied by solid-state NMR spectroscopy

Interactions between Nafion resin and protonated dodecylamine modified montmorillonite: A solid state NMR study

“…Dodecylamine modification resulted in an increase of about 4.80 Å in the interlayer spacing, indicating the formation of intercalated structure. Previous report [32] showed that when dodecyltrimethylammonium cation was intercalated into MMT as a lateral monolayer, the quaternary ammonium cation (-N(CH 3 ) + 3 ) head group resulted in an increase of about 5.10 Å in the interlayer spacing. The head group (ammonium cation) in our system is about two N-H bonds in length, thus about 2 Å, which is much smaller than that of quaternary trimethylammonium cation.…”

“…The head group (ammonium cation) in our system is about two N-H bonds in length, thus about 2 Å, which is much smaller than that of quaternary trimethylammonium cation. It is therefore reasonable to assume that the organic modifier (dodecylamine) may adopt a bi-layer arrangement in the gallery of MMT [32].…”

Surfactant-modified montmorillonite by benzyloctadecyldimethylammonium chloride for removal of perchlorate

“…This results in sufficient space for BODMA + migration in various directions [30]. For BODMA-1-MMT, based on a mutual alkyl chain interlocking mode [31], the 0.13 nm larger d 001 -value and sharper peak than for BODMA-0.5-MMT suggests a pseudo-trilayer conformation. With an increase in the amount of BODMA-Cl added, larger amounts of BODMA-Cl intercalated into the interlayer spaces by hydrophobic interactions among alkyl chains and then rearranged the orientation.…”

Influence of Energy State of Montmorillonite Interlayer Cations on Organic Intercalation

“…Many researchers' characterized arrangement and conformation of alkyl ammonium cations intercalated Mt. Stacking density of alkyl ammonium cations, amount of intercalated cations, leads to variations of interlayer arrangement [15] and spacing of Mt. e remarkable development of molecular computer simulations is very helpful in demonstrating a chemical evolution on the structure and behavior of clay minerals on the atomic level.…”