Sandwich organization of non-ionic surfactant liquid crystalline phases as induced by large inorganic K₄Nb₆O₁₇ nanosheets

Abstract

While retaining its lamellar liquid crystal phase, K4Nb6O17 nanosheets were used as a template to sandwich and stabilize an alkylpoly(ethylene oxide) nonionic surfactant-water system showing monodomain (lamella) formation within the inorganic niobate sheets that appears to be not dependent on the surfactant liquid crystalline state in solution but more its concentration.

Adsorption of diclofenac onto organoclays: Effects of surfactant and environmental (pH and temperature) conditions

“…Thus, these materials have shown particular properties for the adsorption of many emerging pollutants and were found to be more effective in some cases than activated carbon. Recent studies have highlighted an improvement of the adsorption capacity using organoclays as adsorbents that can potentially be an alternative for the remediation of micro-pollutants [7][8][9][10][11][12][13][14][15][16][17]. Indeed, these materials adsorb a large range of pollutants, such as pesticides [18][19], herbicides [20], phenolic compounds [21][22] and various pharmaceutical products [23][24].…”

Structure and Dynamics of Nonionic Surfactant Aggregates in Layered Materials

“…Past aggregation of a lamellar phase of a tri-ethylene glycol mono decyl-n-decyl ether (C10E3) nonionic surfactant onto a montmorillonite (Mt) confirmed the importance of the surfactant state between single molecules and liquid crystalline phase. [16][17][18] These previous works could not precisely stress out the main driving force (H-bonds and ion-dipole interaction) due to impurities (ferromagnetic species…) and the resolution of the traditional techniques used in the characterization of hybrid materials based on clay minerals.…”

Confinement of a Nonionic Surfactant Membrane Within a Montmorillonite as a New Way to Prepare Organoclay Materials

“…In particular, the C 10 E 3 (tri-ethylene glycol mono n-decyl ether) and water system forms internal structures organized by surfactant bilayers such as the lamellar (L α ) characterized by a stack of surfactant molecules aggregated into a two dimensional structure [12][13][14][15] . interlayer space of a Na-montmorillonite, resulting in the state of the lyotropic liquid crystal in a lamellar phase points out the possible link between bulk surfactants molecular structures and the way they pack in the internal structure of the clay mineral [12][13][14] . This last observation on nonionic organoclays differs from previous studies showing that nonionic surfactants adsorption is usually limited to lateral monolayers parallel to phyllosilicate surface 11 .…”

“…Several authors have recently raised the interest to synthesize organoclays by the use of other surfactants 1,[11][12][13] . Nonionic surfactants containing n-C n H 2n+1 (OCH 2 CH 2 ) m OH (abbreviated as C n E m ) can self-assemble to form bicontinuous structures made of amphiphilic bilayers 14 . In particular, the C 10 E 3 (tri-ethylene glycol mono n-decyl ether) and water system forms internal structures organized by surfactant bilayers such as the lamellar (L α ) characterized by a stack of surfactant molecules aggregated into a two dimensional structure [12][13][14][15] .…”

“…Nonionic surfactants containing n-C n H 2n+1 (OCH 2 CH 2 ) m OH (abbreviated as C n E m ) can self-assemble to form bicontinuous structures made of amphiphilic bilayers 14 . In particular, the C 10 E 3 (tri-ethylene glycol mono n-decyl ether) and water system forms internal structures organized by surfactant bilayers such as the lamellar (L α ) characterized by a stack of surfactant molecules aggregated into a two dimensional structure [12][13][14][15] . interlayer space of a Na-montmorillonite, resulting in the state of the lyotropic liquid crystal in a lamellar phase points out the possible link between bulk surfactants molecular structures and the way they pack in the internal structure of the clay mineral [12][13][14] .…”