title: Diester-containing Zwitterionic Gemini Surfactants with Different Spacer and Its Impact on Micellization Properties and Viscosity of Aqueous Micellar Solution.
abstract: A series of diester containing zwitterionic gemini surfactants, N,N-dimethyl-N-alkyl-2-[[hydroxy (alkoxy) phosphinyl]oxy]-alkylammonium designated as C8(-)-S-Cn(+), S = 2 and 3, n = 12, 14 and 16, were synthesized and characterized by instrumental techniques namely FT-IR, (1)H NMR, (13)C NMR, (31)P NMR and Mass spectral studies. These new gemini surfactants further investigated for their various surfactant properties. The critical micelle concentration (cmc) and the effectiveness of surface tension reduction (Πcmc) were determined as a function of surfactant concentration by means of surface tension measurement. Micellization and viscosity properties were investigated by surface tension, electrical conductivity, dye micellization and rheology techniques. The findings of the aqueous surfactant system obtained were impacted by polarity, size and the nature of zwitterions as the surface. The thermodynamic and viscosity properties of these surfactants found to be based on the structures of gemini surfactants.
authors.affiliation: Department of Oils, Oleochemicals and Surfactants Technology, Institute of Chemical Technology (University under Section 3 of UGC Act 1956; Formerly UDCT/ UICT).
authors.forename: Sachin Vasant
authors.initials: SV
authors.lastname: Patil
authors.forename: Sanyukta Arun
authors.initials: SA
authors.lastname: Patil
authors.forename: Amit Prabhakar
authors.initials: AP
authors.lastname: Pratap
mesh_terms: D004952:Esters / Q000737:chemistry*; D008823:Micelles; D015394:Molecular Structure; D012996:Solutions; D013501:Surface-Active Agents / Q000138:chemical synthesis / Q000737:chemistry*; D014783:Viscosity; D014867:Water / Q000737:chemistry*
chemical_list: D004952:Esters; D008823:Micelles; D012996:Solutions; D013501:Surface-Active Agents; D014867:Water