A Comparison of Supercritical Carbon Dioxide and Organic Solvents for the Intercalation of 4-Phenylazoaniline into a Pillared Clay Mineral

A novel water-based epoxy coating using self-doped polyaniline–clay synthesized under supercritical CO2 condition for the protection of carbon steel against corrosion

“…Sc-CO 2 also has the advantage to offer zero surface tension and it is able to swell and selectively dissolve compounds. This Sc-CO 2 process can be used as an intercalating agent for layered materials and a variety of polymers have already been successfully intercalated into MMT [13,18,28,29,[33][34][35]. A new inverse emulsion polymerization and intercalation procedure under Sc-CO 2 was shown to be more effective for impregnation, disaggregation and exfoliation of MMTs than isooctane [6].…”

“…PAni-MMT NCs with organically modified clays were also synthesized using a mechanochemical reaction [24,25]. Others were prepared using the mechanochemical intercalation method [5] Here, we report on the synthesis of PAniC NCs using a supercritical carbon dioxide (Sc-CO 2 ) method [13,[28][29][30]. It is an alternative to the use of toxic organic solvents and is relatively easy to implement (T c = 31.1 • C, P c = 73.8 Bar) [31,32].…”

Characterization of sodium dodecyl sulfate modified iron pillared montmorillonite and its application for the removal of aqueous Cu(II) and Co(II)

“…The synthesis of organo-clays has focused on intercalation of long-chain quaternary ammonium cations in the interlayer space. The reagents can be alkylammonium derivatives, natural organic cations like l-carnitine, l-cystine dimethyl ester, thiamine, 4-phenylazoaniline, and so on [21][22][23][24][25].…”

Designed Nanostructures of Clay for Controlled Adsorption of Organic Compounds

“…Recently, supercritical carbon dioxide was used to incorporate dyes, the process is a superior in terms of equilibrium adsorptivity and adsorption kinetics due to its lower affinity of the adsorbent, higher diffusivity, and much lower viscosity. 103 We have used TMA modified saponite (Sumecton SA) for the immobilization of 1,4-dihydroxyanthraquinone (DAQ) to study its photochemical hole burning (PHB) reaction. 101 PHB is the site-selective and persistent photobleaching of an inhomogeneously broadened absorption band, induced by resonant laser light irradiation at cryogenic temperatures.…”