Effect of Alkylamine Chain Length on the Critical Micelle Concentration of Cationic Gemini Butanediyl-α, ω-bis(dimethylcetylammonium bromide) Surfactant

Khan, Iqrar Ahmad; Mohammad, Riyaj; Alam, Md. Sayem; Kabir-ud-Din, †

doi:10.1080/01932690903123361

Cited by 38 publications

(21 citation statements)

References 24 publications

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“…Like our earlier findings with CTAB [26], which can be considered as the conventional counterpart of 16-s-16, we see, once again, that the amines are less effective than the corresponding alkanols in reducing the CMC values of all the gemini surfactants [36]. The amines are weak bases and, due to feeble hydrolysis ðÀNH 2 þ H 2 O $ NH þ 3 þ OH À Þ; the protonated amine species get repelled by the cationic geminis.…”

Section: Resultssupporting

confidence: 49%

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Mixed Micellization of Cationic Gemini Surfactants with Primary Linear Alkylamines

Khan

Mohammad

Alam

et al. 2009

J Surfact & Detergents

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Due to the potential use of amines as co-surfactants in microemulsions, the effect of adding alkylamines (C 4 -C 8 NH 2 ) on the aggregation properties of cationic gemini surfactants [pentanediyl-1, 5-bis(dimethylcetylammonium bromide) and hexanediyl-1, 6-bis(dimethylcetylammonium bromide), referred to as 16-5-16 and 16-6-16 compounds] has been studied using tensiometry at 303 K. Data on critical micelle concentration (CMC), the surface properties C 20 (the surfactant concentration required to reduce the surface tension by 20 mN/m), U max (maximum surface excess), A min (minimum surface area per molecule) evaluated from the surface tension versus surfactant concentration plot, the interaction parameters b r (for mixed monolayer formation at the aqueous solution/air interface), and b m (for mixed micelle formation in aqueous medium) are reported. A synergistic interaction was observed both in the micelle as well as at interface, as evident from interaction parameters. Theoretical models of Clint, Rubingh and Rosen were used to explain and compare the results. More synergistic interaction was observed in 16-5-16 as compared to 16-6-16. The CMC values of 16-s-16 (s = 5, 6) decreased with increasing amine concentrations and the extent of the effect followed the sequence: octylamine [ heptylamine [ hexylamine [ pentylamine [ butylamine.

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Section: Resultssupporting

confidence: 49%

“…The CMC/C 20 effectiveness is in the order: 16-6-16 [ 16-5-16 [ 16-4-16 [36], which supports the tendency of the 16-6-16 to adsorb at the air/water interface more than 16-5-16. In our previous study we found a similar trend of decreasing CMC with increasing amine concentrations [36]. Values of the G CMC were obtained by using the equation…”

Section: Resultsmentioning

confidence: 96%

Mixed Micellization of Cationic Gemini Surfactants with Primary Linear Alkylamines

Khan

Mohammad

Alam

et al. 2009

J Surfact & Detergents

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“…For all the binary mixtures, pC 20 values increase with an increasing mole fraction of TW-80 indicating low and low surface adsorption [3]. On the other hand, the ease of a particular component toward micellization compared to interfacial adsorption is given qualitatively by CMC/C 20 .The CMC/C 20 values for all mixtures studied is noregular but we can say for α=0.3 and 0.5 the mixture prefer adsorption at interface while other mixtures preferred micelle formation [1], [9].…”

Section: Resultsmentioning

confidence: 99%

Surface Properties of Mixed Adsorbed Surfactants Film of Tween 20 and Tween 80 on Liquid

2017

IJSR

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“…[20] The amphiphilic molecules which contain two parts, one water fearing part or oil preferring, referred to as hydrophobic or lipophilic and the other one is the water preferring part, hydrophilic. In aqueous environment, these amphiphilic molecules (viz., surfactants, [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] drugs, [38][39][40][41][42][43][44][45][46][47] polymers, [48][49][50][51][52] etc. ), can form a kind of self-organized molecular assembly above their critical micelle concentrations (cmc).…”

Section: Introductionmentioning

confidence: 99%

Role of Cloud Point of the Capping Agent (Nonionic Surfactant, Triton X-100) on the Synthesis of Silver Nanoparticles

Alam

Siddiq

Balamurugan

et al. 2015

Journal of Dispersion Science and Technology

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The solution behavior of the nonionic surfactants below and above the cloud point (CP) is quite different. At below CP, a single phase of molecular or micellar solution exists, whereas above the CP, the solution separates into two phases: the first one is denser and smaller phase contains most of the surfactant and the other one is relatively voluminous aqueous phase has surfactant concentration close to the critical micelle concentration (cmc). There are many reports are available where nonionic surfactant used as capping agent. But, to the best of our knowledge, there is no report on the CP's role on the synthesis of nanoparticles (NPs). Therefore, it is very important to understand role of the CP on the synthesis of NPs. In the present work, we report the role of clouding of nonionic surfactant, Triton X-100 (using as capping agent) on the synthesis of AgNPs below and above the CP. The morphology of AgNPs was studied by transmission electron microscopy (TEM), dynamic light scattering (DLS), UV-Vis absorption, etc., techniques. Below the CP spherical polydisperse particles of 12 ± 5 nm mean diameter were found whereas above the CP the aggregated particles with higher diameter were found.

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Effect of Alkylamine Chain Length on the Critical Micelle Concentration of Cationic Gemini Butanediyl-α, ω-bis(dimethylcetylammonium bromide) Surfactant

Cited by 38 publications

References 24 publications

Mixed Micellization of Cationic Gemini Surfactants with Primary Linear Alkylamines

Mixed Micellization of Cationic Gemini Surfactants with Primary Linear Alkylamines

Surface Properties of Mixed Adsorbed Surfactants Film of Tween 20 and Tween 80 on Liquid

Role of Cloud Point of the Capping Agent (Nonionic Surfactant, Triton X-100) on the Synthesis of Silver Nanoparticles

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