Interactions between Quaternary Ammonium Surfactant Oligomers and Water-Soluble Modified Guars

Studies of the Interaction of Cationic Gemini Surfactants with Polymers and Triblock Copolymers in Aqueous Solution

“…The choice of gemini surfactants was made to explore the effect of varying the size of the head group of these compounds on the interactions with neutral polymers in solution. To our knowledge only one previous study of surfactant-polymer interactions has been performed using gemini surfactants (22). The results obtained here are considerably different from those previously reported because different polymers were used in the two studies.…”

Interactions between Polyanions and Cationic Surfactants with Two Unequal Alkyl Chains or of the Dimeric Type

“…A similar result has been obtained in an investigation of the interaction between nonionic water-soluble guar derivatives and cationic monomeric and dimeric surfactants similar to the ones used in this study (22). Apparently the proximity of the two charged amphiphilic moieties in dimeric surfactants strengthens their interaction with polymers, whether neutral or oppositely charged.…”

Dimeric (Gemini) Surfactants: Effect of the Spacer Group on the Association Behavior in Aqueous Solution

“…The corresponding monomer, DTAB, hardly interacted with these two polymers. The trimeric surfactant 12-3-12-3-12 interacted more strongly with these polymers than the dimeric surfactant 12-3-12 (93).…”

“…The 12-s-12 surfactants were shown to interact weakly with hydroxypropylguar and strongly with hydrophobically modified hydroxypropylguar (93). The corresponding monomer, DTAB, hardly interacted with these two polymers.…”

“…The reported studies involved m-s-m dimeric surfactants and several water-soluble polymers (93)(94)(95)(96). The 12-s-12 surfactants were shown to interact weakly with hydroxypropylguar and strongly with hydrophobically modified hydroxypropylguar (93).…”