Flocculation of montmorillonite dispersions based on surfactant-polymer interactions.

Citation:

Magdassi S, Rodel B-Z. Flocculation of montmorillonite dispersions based on surfactant-polymer interactions. Colloids Surf., AColloids and Surfaces, A: Physicochemical and Engineering Aspects. 1996;119 (1) :51 - 56.

Date Published:

1996///

Abstract:

A two-step flocculation process is described in which a polycation (polydiallyldimethylammonium chloride) is adsorbed on to neg. charged montmorillonite particles, followed by the addn. of an anionic surfactant [sodium dodecyl sulfate (SDS)]. At a 1:1 molar ratio, optimal flocculation is obtained owing to the formation of an insol. surfactant-polymer complex in the presence of the particles. The pptn. of the insol. complex is also dependent on the SDS and polymer concns., and occurs at a 1:1 SDS:monomer molar ratio. From adsorption isotherms of the polymer-particle and surfactant-polymer systems, the adsorption energy was calcd. and subsequently a flocculation mechanism is suggested. [on SciFinder(R)]

Notes:

CAPLUS AN 1996:757049(Journal)