Intercalation into sodium montmorillonite

The intercalation of water-soluble polymers is a clear case where the edge effect does not present any barrier to intercalation. An example would be the intercalation of PVP into sodium montmorillonite [1]. In this case, hydrated sodium montmorillonite as a powder can be mixed with powdered PVP in a bowl mixer and the intercalation occiurs in seconds. 

Poly(bis-methoxyethoxycthoxy phosphazene) (MEEP) and cryptand[2.2.2] (crypt) have b n intercalated separately into sodium exchanged montmorillonite (Na-mont), and impedance spectroscopy indicates that ionic conductivities of the resulting nanocomposites (log... 

Takagi et al. reported the intercalation of l, 3, 3 -trimethylspiro[2//-l-benzopyran-2,2 -indoline] (H-SP) and its 6-nitto (NO2-SP) and 6-nitro-8-(pyri-dinium)-methyl (Py+-SP) derivatives into montmorillonite their photochromic behavior (the photochromic reaction of spiropyran is shown in Fig. 22) has been studied for colloidal systems (208). The effects of intCTcalation on the rate of thermal coloration and decoloration have been compared with those in other systems, such as colloidal silica, hexadecyltrimethylammonium bromide, and sodium dodecylsulfate (SDS) micelles. 

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