Dodecyl Dimethyl Ammonium Research Articles

Aqueous and solid state supramolecular ionic network of Fe+2/Ni+2/Cu+2/Zn+2-DTAB-ceftriaxone: Study of radical scavenging and antimicrobial activities

Abstract A series of metallic-supramolecular ionic networks (MSINs) with Fe + 2 /Ni + 2 /Cu + 2 /Zn + 2 , ceftriaxone and dodecyl dimethyl ammonium bromide (DTAB) have been prepared and studied in aqueous and solid both states. In aqueous state the potential of pure individual solutions of Fe + 2 /Ni + 2 /Cu + 2 /Zn + 2 , ceftriaxone, DTAB, Fe + 2 /Ni + 2 /Cu + 2 /Zn + 2 + DTAB and Fe + 2 /Ni + 2 /Cu + 2 /Zn + 2 + DTAB + ceftriaxone were measured, and variations inferred their ionic interaction. For solid MSINs the same interaction has been analysed with FTIR where changes in intensity of IR peaks have been observed. The free radical scavenging activity (FRSA) of individual (metal ions, ceftriaxone, DTAB) on complexion (metal ions + ceftriaxone + DTAB) has been assessed with 2, 2-diphenyl-1-picrylhydrazyl (DPPH) in solid and aqueous both states. All MSINs have shown good antioxidant activity measured via potentiometric titration where decrease in potential was made a criterion for attributing their activity similar to spectrophotometric method. The solid MSINs have also been screened for against Gram − ve ( E. coli ; ATCC 25922) and + ve ( Staphylococcus aureus ; ATCC 33591) bacterial strains where they have shown good response. The antioxidant and antimicrobial activities of prepared MSINs show their medicinal importance.

Wettability modification and restraint of moisture re-adsorption of lignite using cationic gemini surfactant

Adsorption of surfactants onto lignite surface may result in wettability changes and slow the re-adsorption of moisture onto dried lignite. In this work, a cationic gemini surfactant, ethanediyl-1,2-bis(dimethyl dodecyl ammonium bromide) (12-2-12), was chosen, and its adsorption characteristics and the influence on the surface wettability of lignite were investigated. The results suggest that a strong attraction takes place between the negatively charged lignite surface and a gemini surfactant with positively charged head groups to form a monolayer adsorption in low surfactant concentration. Electrostatic forces play a dominant role in the adsorption of a cationic gemini surfactant on the lignite surface while hydrogen bonding does not. The adsorption density of a gemini surfactant on coal surfaces increased with an enhancement in the amount of polar oxygen containing functional groups and the addition of KCl. A decrease in wetting heat indicated that the lignite treated with the gemini surfactant led to a significant decrease in the hydrophilicity of lignite. The high concentration of oxygen-containing functional groups increased the negative charge of the coal surface, which is beneficial for adsorption of the cationic gemini surfactant adsorption onto the coal surface that decreased the hydrophilicity of lignite effectively. The lignite wettability surface modification results were compared with the traditional cationic surfactant cetyltrimethyl ammonium bromide (CTAB); these results suggested that the unique chemical structure of the gemini surfactant with two hydrophilic and two hydrophobic groups had a more prominent impact on lignite surface hydrophilicity. The gemini surfactant adsorbed on lignite surface also had a significant improvement in resisting moisture re-adsorption and could create pathways toward utilizing lignite industrially.

Rheological Investigation of Wormlike Micelles Based on Gemini Surfactant in EG–Water Solution

AbstractThe self‐assembly behavior of gemini surfactants in ethylene glycol (EG)‐water (5/95, v/v) mixed solvent was investigated by rheological measurements at 10 °C. The influence of molecular structure of the gemini surfactant and added hydrotrope on the solution properties was studied. Sodium salicylate (NaSal) showed stronger ability to induce 2‐hydroxyl‐propanediyl‐α,ω‐bis‐(dimethyldodecylammonium bromide), referred to as 12‐3(OH)‐12, to form wormlike micelles than sodium benzoate. Less NaSal is required to promote a sphere to rod transition and to reach the peak viscosity. Moreover, the concentrations of hydrotrope and gemini surfactant are both lower than conventional single‐chain surfactant systems to reach a comparable viscosity. The strong hydrophobicity of gemini surfactants and hydrotropes is responsible for the high efficiency in forming wormlike micelles in EG/water systems. The geometric structure of gemini surfactants also plays a vital role in self‐assembly into wormlike micelles. Dimethylene‐1,2‐bis‐(dodecyl dimethylammonium bromide), referred to as 12‐2‐12, shows absolute superiority over 12‐3(OH)‐12 in constructing wormlike micelles. The present study will be helpful for developing de‐icing fluids and anti‐freezing solutions, which need rheology control in EG‐aqueous medium at low temperature.

Synthesis of Hydrophobic Cationic Chitosan Flocculant and Its Sludge Dewatering Property

ABSTRACTThe hydrophobic cationic chitosan (HTCC) flocculant was synthesized by reacting chitosan with epoxy propyl trimethyl ammonium chloride (EPTAC) and (2,3-epoxy propyl) dodecyl dimethyl ammonium chloride (EDC), to improve its waste sludge dewaterability. By FTIR and 1H NMR analysis, EPTAC and EDC were confirmed to be grafted onto the molecular chains of chitosan (CTS) successfully. With the increase of EDC content, G′ of HTCC aqueous solution with 1:1.5:1.5 mole ratio of CTS:EPTAC:EDC consistently showed higher values than G″ over the entire frequency range explored, indicating the formation of a physically cross-linked network. The crystallization ability of HTCC decreased compared with pristine CTS. The long alkyl chains on the EDC molecules enhanced the hydrophobicity of HTCC, and better dewaterability of the waste sludge was achieved through the promoted bridging action of HTCC.

Electrospray ion mobility mass spectrometry of positively and negatively charged (1R,2S)-dodecyl(2-hydroxy-1-methyl-2-phenylethyl)dimethylammonium bromide aggregates.

Self-assembling processes of surfactants in the gas phase constitute a developing research field of interest since they allow information to be gained on the peculiar structural organization of these aggregates, on their ability to incorporate from small molecules up to proteins and on their possible use as carriers of drugs in the gas phase or as cleaning agents and exotic reaction media. The mass spectra of charged aggregates of the chiral surfactant (1R,2S)-dodecyl(2-hydroxy-1-methyl-2-phenylethyl)dimethylammonium bromide (DMEB) in the gas phase have been recorded using a Synapt G2-Si mass spectrometer in the positive and negative ion mode. For comparison purposes, the mass spectra of sodium bis(2-ethylhexyl)sulfosuccinate and sodium octane sulfonate aggregates have also been recorded under the same experimental conditions. The collisional cross sections of positively and negatively charged DMEB aggregates were obtained through an appropriate calibration of the measured drift times. For all the surfactants investigated, it has been found that there is a lowest and a highest limit of the aggregation number at each charge state: no aggregates are found outside this range. Moreover, the occurrence at each aggregation number and extra charge of a unique value of drift time points toward aggregates whose conformations do not show discernible shape change in the experiment time scale. The analysis of the collisional cross sections emphasizes that the DMEB aggregates are nearly spherical clusters somewhat affected by the charge state and constituted by interlaced polar and apolar domains. The analysis of all the experimental findings indicates that in the gas phase DMEB forms supramolecular aggregates characterized by an internal organization whose stability is triggered by the charge state. The comparison of the behavior of DMEB aggregates with that of sodium bis(2-ethylhexyl)sulfosuccinate and sodium octane sulfonate aggregates allows us to highlight the effects on the aggregate organization in gas phase due to nature of the head group and alkyl chain steric hindrance.

Quaternary ammonium biocides as antimicrobial agents protecting historical wood and brick.

Quaternary ammonium compounds (QACs) are widely used in disinfection of water, surfaces and instruments as well as in textile, leather and food industries because of their relatively low toxicity, broad antimicrobial spectrum, non-volatility and chemical stability. Due to these advantages, QACs are also used in restoration and can be applied on historical material. The aim of this study was to determine the usefulness of biocides based on quaternary ammonium salts and containing various excipients in the protection of historical materials against microbial growth. The study determined the antimicrobial activity of three biocides against bacteria: Pseudomonas fluorescens, Staphylococcus equorum, Bacillus cereus, Bacillus muralis, Sporosarcina aquimarina and Rhodococcus fascians, and moulds: Chaetomium globosum, Penicillium citreonigrum, Cladosporium cladosporioides I, Acremonium strictum, Aspergillus fumigatus and Cladosporium cladosporioides II, all isolated from historical wood and brick. Staphylococcus equorum, Bacillus cereus, Sporosarcina aquimarina and Rhodococcus fascians bacteria, and Cladosporium cladosporioides I and Acremonium strictum moulds showed high sensitivity to quaternary ammonium biocides. Historical wood can be effectively disinfected by three applications of biocide A (30% v/v) containing dodecyl dimethyl ammonium chloride (DDAC), citric acid, propiconazole and propanol. Disinfection of historical brick can be carried out by three applications of 6% v/v solutions of biocide B (based on DDAC and ethylenediaminetetraacetic acid - EDTA) or biocide C (containing a non-ionic surfactant, DDAC and EDTA). Effective protection of historical building materials against microbial growth for a period of seven days can be achieved by the application of biocide A (30% v/v) on the wood surface and biocide B (6% v/v) on the brick surface.

Intercalation behavior and enhanced dewaterability of waste sludge of cationic polyacrylamide/montmorillonite composite synthesized via in situ intercalation polymerization

Montmorillonite was rendered organophilic with acryloxyethyl dodecyl dimethyl ammonium bromide (denoted as OMMT-AD), and a series of cationic polyacrylamide (CPAM)/OMMT-AD composites were synthesized via an in situ intercalation polymerization. It was found that with increasing AD content, the interlayer spacing of OMMT and the thickness of the intercalated AD chains increased, and the saturation content of AD molecules in the MMT layers was 2.0 CEC. Some orderly structures of AD molecules formed between the MMT layers, and MMT was proposed to present lateral-monolayer, lateral-bilayer and paraffin-type monolayer conformations in the confined space of MMT. The cationic degree and reduced viscosity of the CPAM/OMMT-AD composites decreased with the increase of the OMMT-AD content. The strong intermolecular interaction appeared between the CPAM and the OMMT-AD, and the OMMT-AD platelets dispersed well with an exfoliated state in CPAM matrix as indicated by X-ray diffraction analysis and TEM observation. Compared with solution intercalation, the composites prepared by in situ intercalation polymerization had better stability and dispersion of MMT in the CPAM matrix. The dewaterability of the waste sludge was improved by using CPAM/OMMT-AD composites.

Induced Chirality in Confined Space on Halogen Gold Complexes

The solubilization of HAuCl4 in toluene within optically active reverse micelles and lamellar structures formed by (1R,2S)-Dodecyl(2-hydroxy-1-methyl-2-phenylethyl)dimethylammonium bromide (DMEB) has allowed us to evidence the complex phenomenology accompanying the confinement of Au salt within these nanostructures. Together with a chloride/bromide exchange process occurring in the first coordination sphere of an Au ion, UV–vis and electronic circular dichroism (ECD) spectra reveal the appearance of an induced dichroic signal attributable to Au complexes entrapped in the hydrophilic domain of the DMEB chiral nanostructures. Interestingly, change of the effective oxidation state and coordination geometry of the gold ion confined in DMEB nanostructures has been inferred by an analysis of the Au and Br X-ray Absorption Fine Spectroscopy (X-ray Absorbition Near Edge Spectroscopy and Extended X-ray Absorption Fine Spectroscopy) signals. Remarkably, bromine, not covalently bonded to the organic part, acts as the vector that transfers the chirality information on the DMEB to the gold complexes. Structural information on the HAuCl4 solubilized in DMEB reverse micelles dispersed in toluene, obtained by SAXS, indicate the formation of elongated clusters consisting of Au complexes stabilized by DMEB, confirming that the chirality transfer occurs in the micellar core of the DMEB and persists in the solid composites obtained by slow evaporation of the solvent.

Biodegradation of benzalkonium chlorides singly and in mixtures by a Pseudomonas sp. isolated from returned activated sludge

Bactericidal cationic surfactants such as quaternary ammonium compounds (QACs) are widely detected in the environment, and found at mgkg−1 concentrations in biosolids. Although individual QACs are amenable to biodegradation, it is possible that persistence is increased for mixtures of QACs with varying structure. The present study evaluated the biodegradation of benzyl dimethyl dodecyl ammonium chloride (BDDA) singly and in the presence of benzyl dimethyl tetradecyl ammonium chloride (BDTA) using Pseudomonas sp., isolated from returned activated sludge. Growth was evaluated, as was biodegradation using 14C and HPLC-MS methods. BDTA was more toxic to growth of Pseudomonas sp. compared to BDDA, and BDTA inhibited BDDA biodegradation. The benzyl ring of [U-14C-benzyl] BDDA was readily and completely mineralized. The detection of the transformation products benzyl methyl amine and dodecyl dimethyl amine in spent culture liquid was consistent with literature. Overall, this study demonstrates the antagonistic effect of interactions on biodegradation of two widely used QACs suggesting further investigation on the degradation of mixture of QACs in wastewater effluents and biosolids.

Dodecyldimethyl(3-sulfopropyl)ammonium Hydroxide와 다른 계면활성제와의 혼합미셀화에 관한 연구

Dodecyldimethyl(3-sulfopropyl)ammonium Hydroxide와 다른 계면활성제와의 혼합미셀화에 관한 연구

Efeito do tratamento de bacelos de videira 'Red Globe' no controle do cancro bacteriano causado por Xanthomonas campestris pv. viticola

A disseminação de Xanthomonas campestris pv. viticola (Xcv), agente do cancro bacteriano da videira, ocorre, dentre outras formas, por meio de mudas e bacelos infectados. Foi estudada a obtenção de material propagativo livre do patógeno, testando a eficiência do tratamento de bacelos com termoterapia, bactericidas e sanitizantes. Os isolados de Xcv foram testados quanto à patogenicidade e realizado o teste de sensibilidade in vitro aos produtos, em diferentes concentrações. A erradicação de Xcv em bacelos de videira foi testada em experimentos com termoterapia (50ºC por 30 e 40 min; 53ºC por 5 e 10 min); bactericidas [oxitetraciclina+sulfato de cobre (150+2.000; 165+2.200; 180+2.400 e 195+2.600 mg L-1 de H2O) e oxitetraciclina (600; 700; 800 e 900 mg L-1)]; e sanitizantes [cloreto de dodecildimetil amônio (600; 1.200; 1.800; 2.400 e 3.000 µL L-1); hipoclorito de sódio (5.000; 10.000; 20.000; 30.000 e 40.000 µL L-1) e cloreto de benzalcônio (125; 167;250; 334 e 500 µL L-1)]. Foram avaliados período de incubação, incidência e severidade da doença. O bactericida oxitetraciclina e os sanitizantes cloreto de dodecildimetil amônio e hipoclorito de sódio proporcionaram os maiores halos de inibição de Xcv in vitro. No entanto, apesar dos diversos tratamentos testados, não foi possível recomendar tratamento termoterápico ou produto que erradicasse Xcv de bacelos infectados. Porém, ficou confirmada a grande importância destes na disseminação do agente do cancro bacteriano da videira.

Xanthomonas campestris pv. viticola on grapevine cutting tools and water: survival and disinfection.

Bacterial canker (Xanthomonas campestris pv. viticola) (Xcv) is the most important disease of grapevine in northeast of Brazil. The survival of Xcv2Rif was evaluated from 0 to 42 h following the dipping of the harvest shears in a pathogen suspension. An in vitro test of Xcv sensitivity to sanitizing agents and initial tests on shears were performed with dodecyl dimethyl ammonium chloride (1,140 ppm), benzalkonium chloride (245 ppm), sodium dichloroisocyanurate (16.2 ppm), sodium hypochlorite (20,000 ppm), calcium hypochlorite (130 ppm), calcium oxychloride (97,500 ppm) and chlorine dioxide (41 ppm). The ability of dodecyl dimethyl ammonium chloride (1,140 ppm) and sodium hypochlorite (20,000 ppm) to disinfect shears was tested with 50 sequential cuts on vine leaves. The maintenance of the efficacy of the sanitizing agents was tested between 0 and 8 h following solution preparation. The ability of five sanitizing agents to disinfect Xcv-contaminated water was also tested. Xcv survived for 24 h on harvest shears. Sodium hypochlorite and dodecyl dimethyl ammonium chloride presented the largest growth inhibition zones to four Xcv isolates and were 100% effective in disinfecting contaminated harvest shears. These two sanitizing agents maintained their efficacy for 8 h. Xcv was spread by contaminated harvest shears until the 24th cut, in average. Water disinfection was successfully achieved with dodecyl dimethyl ammonium chloride (570 ppm), sodium hypochlorite (5,000 ppm) and benzalkonium chloride (122.5 ppm).

Fluorophotometric determination of critical micelle concentration (CMC) of ionic and non-ionic surfactants with carbon dots via Stokes shift

A new and facile method for the determination of critical micelle concentration (CMC) of ionic and non-ionic surfactants is proposed in this article. Carbon dots exhibited substantial fluorescence and therefore enhanced the sensitivity of this evaluation. Understanding the formation of surfactant micelles is vital for the applications of biomedicine such as drug fabrication and smart molecular vehicles in delivering therapeutic dosage to various molecular sites. The fluorescence property of carbon dots was utilized for the first time to estimate the critical micelle concentration of surfactants. The central concept of the approach is based on the Stokes shift determination of a system composed of constant amount of carbon dots with varying concentrations of ionic and non-ionic surfactants. The synthesized carbon dots were characterized by FTIR, TEM, XRD, Raman, UV, and fluorescence spectroscope. The carbon dots were excited at 280nm so as to obtain maximum emission for the Stokes shift measurement. The CMC value of cetyltrimethyl ammonium bromide (CTAB), sodium dodecyl sulfate (SDS), Triton X-100, dodecyldimethyl(3-sulfopropyl)ammonium hydroxide (SB-12) evaluated by this approach was found to be 0.98, 7.3, 0.19, and 3.5mM, respectively. The signals of spectra were assigned and explained in terms of both electron transitions between specific molecular orbital and the interaction with solvent.

Morphology and local organization of water-containing (1R,2S)-dodecyl(2-hydroxy-1-methyl-2-phenylethyl)dimethylammonium bromide reverse micelles dispersed in toluene.

The structure of (1R,2S)-dodecyl(2-hydroxy-1-methyl-2-phenylethyl)dimethylammonium bromide (DMEB) reverse micelles, at various water-to-surfactant molar ratio (Rw, Rw = [water]/[DMEB]) and DMEB concentrations, has been investigated by small angle X-ray scattering (SAXS) and extended X-ray absorption fine structure spectroscopy (EXAFS). SAXS data of dry reverse micelles are consistent with a model of spherical hydrophilic core surrounded by DMEB alkyl chains whose polydispersity decreases significantly with surfactant concentration. By adding water, a sphere to cylinder transition occurs leading to a one-dimensional growth of reverse micellar cores with Rw and surfactant concentration. The observed behavior was taken as an indication that water molecules are confined in the core of DMEB reverse micelles, quite uniformly distributed among them and mainly located among surfactant head groups. EXAFS data allow to focus within the hydrophilic micellar core to solve the short range local environment around the Br(-) counterion and to follow its changing with surfactant concentration and Rw. Analysis of Fourier transform of the EXAFS spectra indicates the existence of a local order nearby the bromide ions; pointing toward a quite structured hydrophilic core of DMEB reverse micelles. However, as a consequence of the fluid nature of reverse micelles, such local order is lower than that found in the lamellar structure of solid DMEB. Water confinement within the reverse micellar cores induces an increase of the local disorder suggesting an enhancement of the micellar core dynamics.

Solid-phase extraction gold from alkaline cyanide solution with quaternary ammonium surfactant

The solid-phase extraction (SPE) technique applied to the extraction of organic compound was creatively used as the extraction of inorganic gold in the paper. Two types of techniques were proposed and explored, namely the SPE and the liquid–liquid extraction (LLE) of the quaternary ammonium surfactant [cetytrimethyl ammonium bromide (CTMAB), cetyl pyridine bromide (CPB), benzyl dimethyl dodecyl ammonium chloride (BDMDAC), and dodecyl trimethyl ammonium chloride (DTMAC)]. The surfactant could react with Au(CN) 2 − to form the ionic complex, and the compound could be extracted by SPE column of reversed-phase bonded silica gel. Hence, a new method of SPE was proposed to extract gold with these features of the high selectivity, the reliability, and the simplicity. The experimental result shows that the recovery rate of gold is more than 98 %, and the solid-phase extraction column is not easily damaged and it can be repeatedly used. The new method can be used as the extraction process of gold from alkaline cyanide solution as well. Besides, the paper also puts forward a new process of gold extraction.

Synthesis, Surface Properties, and Antibacterial Activity of Quaternary Ammonium Salts Containing Epoxide Group

Epoxypropyl dodecyl dimethyl ammonium chloride (EPDDMAC) was synthesized with N,N-dimethyl dodecyl amine (DMDA) and epichlorohydrin (EPIC). Diethyl-2,3-epoxypropyl-[3-methyldimethoxyl)] silpropyl ammonium chloride (DEEPSAC) was synthesized with N,N-diethyl-aminopropyl-methyldimethoxysilane (DEAPMDES) and epichlorohydrin (EPIC). The products were characterized by infrared and elemental analysis and 1H NMR spectroscopy. The surface tension, conductivity, and antibacterial activities of EPDDMAC and DEEPSAC were studied.

Phase-transfer catalysis of a new cationic gemini surfactant with ester groups for nucleophilic substitution reaction

Abstract A highly effective phase transfer of a quaternary ammonium gemini surfactant with ester groups ((diethylhexanedioate) diyl-α,ω-bis(dimethyl dodecyl ammonium bromide) referred to as 12-10-12) was synthesized with high yield and characterized by infrared spectroscopy, elemental analysis and 1H-NMR. Then, 12-10-12 was used as a phase transfer catalyst to study the catalytic effect on the reaction of anhydrous sodium acetate and 4-methylbenzyl chloride. The possible catalytic mechanism and the influence of surfactant concentration, temperature and type are also discussed. The experimental results showed that the catalysis efficiency was more active than the traditional, single-chained surfactant, tetrabutyl ammonium bromide. It also revealed that the reaction was first-order with respect to the concentration of 4-methylbenzyl chloride. The concentration of 4-methylbenzyl chloride grew linearly with the concentration of 12-10-12 and as the reaction temperature increased. The optimum reaction time was 7 h.

Chiroptical Phenomena in Reverse Micelles: The Case of (1R,2S)‐Dodecyl (2‐hydroxy‐1‐methyl‐2‐phenylethyl)dimethylammonium Bromide (DMEB)

(1R,2S)-Dodecyl(2-hydroxy-1-methyl-2-phenylethyl)dimethylammonium bromide (DMEB) aggregates dispersed in carbon tetrachloride have been investigated by Fourier transform infrared (FT-IR), vibrational circular dichroism (VCD) and (1)H nuclear magnetic resonance (NMR) spectroscopy at various surfactant concentration and water-to-surfactant molar ratio. Experimental data indicate that, even at the lowest investigated concentration and in absence of added water, DMEB molecules associate in supramolecular assemblies. At higher DMEB concentration the aggregates can confine water molecules, making it plausible to think that DMEB form reverse micelles and that water molecules are quite uniformly distributed among them and mainly located in the proximity of surfactant head groups. Moreover, the water state in DMEB reverse micelles has been found to be different from that in pure water, due to system-specific water/surfactant head group interactions. (1)H NMR diffusion measurements of both water and DMEB emphasize their joined translational motion characterized by a diffusion rate one order of magnitude lower than that of free molecules. Finally, VCD allowed us to show some characteristics of the association of optically active DMEB molecules as reverse micelles and water confinement inside; namely, we monitored the vibrational optical activity of deuterated hydroxyl bonds of the self-assembled DMEB molecules and their interaction with D(2)O molecules.

Modified gelatin with quaternary ammonium salts containing epoxide groups

Abstract An EPDDMAC-GE polymer (hydrophilic molecule) has been synthesized based on epoxypropyl dodecyl dimethyl ammonium chloride (EPDDMAC) and gelatin. A DEEPSAC-GE polymer (hydrophobic molecule) has been synthesized based on diethyl-2,3-epoxypropyl-[3-methyldimethoxyl] silpropyl ammonium chloride (DEEPSAC) and gelatin. Compared with initial gelatin, the gelatin modified with quaternary ammonium salts containing epoxide groups exhibits stronger antibacterial activity.

Mixed Micellar Properties and Related Interaction Parameters of Butanediyl‐1,4‐bis(dodecyl dimethyl ammonium bromide) Gemini Surfactant with Nonionic Amphiphiles

AbstractMixed micellization of cationic gemini surfactant butanediyl‐1,4‐bis(dimethyldodecylammonium bromide) with nonionic surfactants (sorbitan esters, alcohols and phenol ethoxylates) and triblock copolymers has been studied tensiometrically. Various physicochemical parameters of the studied systems including ideal CMC values, experimental and ideal micellar compositions, interaction parameters, activity coefficients of the components, etc. have been evaluated by considering theoretical models of Clint, Rubingh, Rosen and Maeda. The experimental critical micelle concentration (CMC) values of the mixed micelles were lower than the CMC values of the individual components and showed a negative deviation from ideal CMC (CMC*) values. The analysis reveals that the mole fractions of gemini are lower compared to the nonionic surfactants/triblock polymers and the values of ΔGm°, ΔGad°, Gmin and ΔGexm show that the spontaneity of the studied mixed micelles relatively decreases as the content of the gemini in the bulk phase increases.