Ionic Liquid Surfactant Research Articles

Influence of the Alkyl Chain Length of the Imidazole Ionic Liquid-Type Surfactants on Their Aggregation Behavior with Sodium Dodecyl Sulfate.

The influence of the alkyl chain length of the ionic liquid surfactants 1-hexadecyl-3-alkyl imidazolium bromide [C16imCn]Br (n = 2-16) on their aggregation behavior with sodium dodecyl sulfate (SDS) in water was studied. The rheological properties, thermostability, and microstructure of the samples were characterized via a combination of rheology, cryo-transmission electron microscopy, polarization optical microscopy, and small-angle X-ray scattering. Upon the addition of SDS, the [C16imCn]Br (n = 2, 4, 6) rodlike micelles transit into the gels with high water content. The effects of molar ratio and alkyl chain length on the viscoelasticity and thermal stability of the SDS/[C16imCn]Br (n = 2, 4, 6) gels were studied. However, the [C16imCn]Br (n = 8, 10, 12, 14, 16) rodlike micelles precipitate with the addition of SDS. The [C16imCn]Br (n = 10, 12, 14, 16) gels transit to the rodlike micelles with the proper addition of SDS. The mechanism of the influence of the alkyl chain length of the [C16imCn]Br on their aggregation behavior with SDS was proposed.

An environmentally benign ionic liquid based formulation for enhanced oil spill remediation: Optimization of environmental factors

Formulations based on ionic liquids (ILs) have emerged as potential alternatives to conventional dispersants for remediating the effect of oil spills. However, the performance of such IL formulations is greatly affected by various environmental factors. The present study developed a model that correlates the wave-mixing energy, temperature and salinity with the dispersion effectiveness for a formulation comprising an IL surfactant and a biosurfactant using response surface methodology. The experimental results were fitted with a second-order quadratic model; the analysis of variance showed good correlation between the experimental and predicted data with a R2 value of 0.9968. The maximum dispersion effectiveness was found to be 88.4% at the optimized conditions of a stirring rate of 242 rpm, temperature of 28.3 °C and salinity of 3.4 wt% with an experimental error of <2.0%. Crude oil samples dispersed at these optimized conditions were examined by optical microscopy and dynamic light scattering, and fine droplets with sizes of <300 nm were observed. The results of this work will improve the understanding of the effects of specific environmental factors on this new formulation and assist in oil spill response planning and decision making.

Comparative study on two imidazolium‐based ionic liquid surfactants as corrosion inhibitors for N80 steel in 15% hydrochloric acid solution

AbstractA comparative study on 1‐dodecyl‐2,3‐dimethylimidazolium chloride ([DDMIM]Cl) and 1‐benzyl‐3‐dodecyl‐2‐methylimidazol‐1‐ium chloride ([BDMIM]Cl) as corrosion inhibitors for N80 steel in a 15% hydrochloric acid solution was performed by surface tension tests, electrochemical measurements, weight loss, scanning electron microscopy, atomic force microscopy, and theoretical calculations. The experimental results confirm that [DDMIM]Cl and [BDMIM]Cl act as mixed‐type inhibitors. The adsorption of both inhibitors on the N80 steel surface obeys the Langmuir adsorption isotherm, and [BDMIM]Cl exhibits better inhibitive performance, lower critical micelle concentration (CMC), and a lower ratio of saturation adsorption concentration on the steel surface to its own CMC than [DDMIM]Cl. The results of theoretical calculations reveal that the electron‐donating/accepting capacities and hydrophobicity of the benzyl substituent in the imidazole ring are essential for preventing steel corrosion in acid media.

The aggregation behavior of fluorinated surfactant in an ionic liquid

Although ionic liquids have been studied as self-assembly media, the aggregation of fluorinated surfactants in ionic liquids has not been fully understood. In this work, the aggregation behavior of the fluorinated surfactant, N-ethylperfluorooctane sulfonamide (N-EtFOSA), in the aprotic ionic liquid, 1-ethyl-3-methylimidazolium ethylsulfate ([C2mim][EtSO4]), was studied using surface tension, 19F-NMR, dynamic light scattering (DLS), and cryo transmission electron microscopy (cryo-TEM). The surface properties and thermodynamic parameters were calculated based on the results of surface tension measurements. It was found that the fluorinated surfactant exhibits a considerable surface activity in aprotic ionic liquids, and its critical micelle concentration (cmc) increases with increasing temperature. In addition, the surface properties indicate that solvophobic interactions are the main driving force for micelle formation. The thermodynamic parameters for micelle formation derived from the temperature dependence of the cmc revealed that micelle formation is an enthalpy-driven process. DLS and cryo-TEM results indicated the presence of nanoscale micelles in the N-EtFOSA + [C2mim][EtSO4] system. The results of this work imply that this fluorinated surfactant exhibits a more pronounced surface activity than conventional hydrocarbon surfactants in [C2mim][EtSO4].

Palladium Acetate/[CPy][Br]: An Efficient Catalytic System towards the Synthesis of Biologically Relevant Stilbene Derivatives via Heck Cross‐Coupling Reaction.

AbstractThe main objective of this study was to replace the traditionally applicable volatile organic solvents and imidazolium‐based ionic liquid solvents with thermally stable surfactant, cetylpyridinium bromide as surfactant ionic liquid (SIL) and examine the potential of the same as viable reaction medium in the synthesis of stilbenes, quinoxaline and pyridone decorated substrates via Heck cross‐coupling reaction. This work thoroughly investigates the thermal, spectral and morphological properties of cetylpyridinium bromide as surfactant ionic liquid. Cetylpyridinium bromide is a well‐known germicide with well‐established degradation mechanism and displays remarkable solvent properties for the homogeneously catalysed Heck cross‐coupling reactions, which is of great significance to enlarge the applications window of cetylpyridinium bromide from biologically significant surfactant material to the choice of solvent in synthetic organic chemistry.

Phase behavior and microstructure of sugar surfactant-ionic liquid microemulsions

Microemulsions have been explored as a unique and versatile reaction media for a variety of chemical reactions, viz. nanoparticle preparation, organic synthesis, bio-organic synthesis etc. The phase behavior and microstructure of a ternary system water/1-butyl-3-methylimidazolium hexafluorophosphate/Sugar Surfactant was studied as a function of temperature and sugar surfactant mass fraction, γ. In the present study, a hydrophobic ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate was used to replace commonly used organic solvents (n-alkanes) as an oil/non-polar phase substitute in ternary microemulsion formulations, wherein, a sugar based alkyl polyglycoside nonionic surfactant was used instead of a conventional nonionic surfactant (i.e., alkyl polyoxyethylene ether class) to solubilize hydrophobic ionic liquid and water. The effect of alkanols of variable chain length (octanol, decanol and dodecanol) as co-surfactant on the phase behavior and microstructure of ionic liquid/sugar surfactant/water ternary microemulsion systems was also investigated. The ability of nonionic sugar-based surfactant n-decyl β-D-maltoside, and n-dodecyl β-D-maltoside, to solubilize oil (hydrophobic ionic liquid) and water, i.e., was evaluated. Moreover, phase behavior and microstructure of ternary systems, 1-butyl-3-methylimidazolium tetrafluoroborate:water (1:1)/sugar surfactant/n-alkanes (alkanes of varying chain length, i.e., octane, decane and dodecane) was also studied. Solubilization of a water insoluble dye, Sudan Red, in selected microemulsion systems was also investigated.

Enhancement of β‐Phase Crystalline Structure and Piezoelectric Properties of Flexible PVDF/Ionic Liquid Surfactant Composite Nanofibers for Potential Application in Sensing and Self‐Powering

AbstractPolyvinylidene fluoride (PVDF) is a piezo‐polymer which among its crystalline phases, the β‐phase has been researched for the improvement of piezoelectric properties. In this study, to improve the β‐phase contents and thereby the piezoelectric response of the polymer, the effect of adding self‐synthesized ionic liquid surfactant (ILS) in PVDF nanofibers is studied. This material is added in different weight percentages into the PVDF solution and the nanofibers are produced by electrospinning to prepare active piezoelectric thin layers. SEM, XRD, FTIR, and piezo‐tests are employed for assessing the effect of the ILS on the enhancement of β‐phase in electrospun nanofibers and their piezoelectric performance. The results indicate ≈98.6% β‐phase formation in the sample containing 4 wt% ILS and in comparison with the pure nanofibers, the output voltage and its power density are improved 186.9% and 275%, respectively. Considering the results, it is suggested that the ILS can improve the piezoelectric response of the polymer in the fabricated structure by simple mixing in solution compared to other additives.

Effects of selenium atom on the solution properties of N-alkyl-N-methylpyrrolidinium bromide

Selenium-containing surfactants have recently attracted considerable interest, but the influences of a selenium (Se) atom and its site on the solution properties are still a challenge. Herein, we systematically studied the micellization behavior and foam/emulsion properties of ionic liquid surfactants (CmSeCnMPB, m = 14,12,10, m + n = 16, MPB = N-methylpyrrolidinium bromide) bearing a Se atom at different sites of the hydrophobic tail, and compared with N-cetyl-N-methylpyrrolidinium bromide (C16MPB). The results showed that the micellization behavior and foam/emulsion properties of CmSeCnMPB are closely related to the site of the Se atom in the hydrophobic tail. With increasing the spacer between Se atom and headgroup, the critical micelle concentration (cmc) and minimum area per surfactant molecule at the air–water interface (Amin) all increased, whether for the reduced or oxidized form, and the pC20 values, standard Gibbs free energy of micelle formation (ΔGmo) decreased accompanied by an increasing contribution of the Se atom, reflecting a shortening in the effective length of the hydrophobic chain. Upon increasing temperature, the micellization of CmSeCnMPB was transformed from entropy-driven mode to enthalpy-driven mode, and the transformation temperature decreased with increasing the spacer length. The longer the spacer, the worse the foam/emulsion performance, and the greater the oxidation-induced changes in cmc, Amin, pC20, and foam/emulsion properties. Oxidation can completely switch off the foam/emulsion properties of C10SeC6MPB, but only impair those of C12SeC4MPB or C14SeC2MPB. By comparison with C16MPB, it is confirmed that the Se atom brings two competing effects: enhancing hydrophobicity akin to one methylene and decreasing hydrophobicity by disturbing the regularity. The former prevails over the latter for C14SeC2MPB, but the latter surpasses the former for C10SeC6MPB.

Micellization, surface activities and thermodynamics study of dialkylpyridinium [C16pymCn][Br] (n = 1–4) in aqueous solutions

The pyridinium-base ionic liquids surfactants: N-hexadecyl-3-alkylpyridinium bromide [C16pymCn][Br] (n: the carbon numbers of short alkyl side chain, n = 1, 2, 3, 4) were synthesized and characterized by NMR(1H, 13C) and FTIR. The thermal properties of the [C16pymCn][Br] showed a same transition from a crystalline phase to a thermotropic liquid-crystalline phase and then to an isotropic liquid phase, and were thermally stable in the desired temperature range. The critical micelle concentration (CMC) values and surface tension of [C16pymCn][Br] gradually decreases with the increasing length of the side chain from 1 to 4. The temperature dependence of CMC shows typical U-shaped. The surface chemical parameters of all the synthesized surfactants showed moderate surface activity. The calculated thermodynamic parameters showed that the micellization processes of [C16pymCn][Br] are spontaneous, endothermic at low temperatures and exothermic at high temperatures. For the micellization process of [C16pymCn][Br] (n = 1–3) were entropy-driven in the investigated temperature range. The micellization process of [C16pymC4][Br] changes from entropy-driven to enthalpy-driven at high temperature. The standard heat capacity were further discussed. It can be concluded that propyl- and butyl-chain of meta-position can be folded and thus at least partially removed from contact with water.

Spectroscopic and interfacial investigation on the interaction of hemoglobin with conventional and ionic liquid surfactants

A comprehensive investigation on the interactions between equine heart hemoglobin and different surface active agents including ionic liquid surfactants (ILs) was performed in aqueous buffer (pH = 7.4) by ultraviolet-visible and fluorescence spectroscopic techniques coupled with tensiometry. The surface active agents include a cationic surfactant cetyltrimethylammonium bromide (CTAB), two cationic ILs 1-hexadecyl-3-methylimidazolium chloride (C16MeImCl), 1-butyl-3-methylimidazolium octyl sulfate (C4MeImOS), three anionic surfactants sodium N-dodecanoyl sarcosinate (SDDS), sodium dodecylbenzene sulfonate (SDBS), sodium cholate (NaC), and a non-ionic surfactant N-decanoyl-N-methylglucamine (Mega 10). In particular, surfactant-induced conversion of the iron coordination and spin states of hemoglobin was monitored by the shifts of the Soret peak. Fluorescence studies indicated exposure of the tryptophan and tyrosine residues of hemoglobin to polar environment when surface active agents were introduced, the relative contributions of these amino acids to the fluorescence intensity being different for different surfactants. Hemoglobin was found to be unfolded in surfactant solutions. Unfolding of hemoglobin was found to be more pronounced in presence of ionic surfactants than in presence of the non-ionic one.

Magnetic proline-based ionic liquid surfactant as a nano-carrier for hydrophobic drug delivery.

Magnetic proline-based surface-active ionic liquid ([ProC10][FeCl3Br]) have been synthesized and investigated for their application in hydrophobic drug delivery. Hydrophobic drugs lead to poor absorptivity, drug aggregation, and high local toxicity. Herein, the vesicular structures formed from [ProC10][FeCl3Br] have been used as drug delivery reactors. The self-assembly behavior of [ProC10][FeCl3Br] in aqueous medium has been investigated using tensiometry, fluorescence, dynamic light scattering (DLS), and transmission electron microscopy (TEM). The physicochemical interactions of [ProC10][FeCl3Br] with animal DNA have been studied using circular dichroism (CD), fluorescence, zeta potential, and gel electrophoresis to confirm its bio-friendly nature. The engendered vesicles prepared from [ProC10][FeCl3Br] have been investigated for the in vitro drug delivery of guest molecule pyrene as a hydrophobic model drug and ciprofloxacin as a hydrophobic antibiotic drug. The drug loading capacity and spontaneous kinetic release of the drug have been studied using various theoretical mathematical drug release models.

Ionic liquid surfactants as multitasking micellar catalysts for epoxidations in water

Surface-active imidazolium tungstate ILs are multitask epoxidation catalysts in water using H2O2 as oxidant. The micelles solubilize olefins in the aqueous phase and catalyze the epoxidation. Organophosphonic acids greatly increase the reaction rate.

The Synergistic Effect of NaHSO4 and NaCl Salts on Corrosion Inhibition Performance of Two Gemini Cationic Surfactant Ionic Liquids

In this study, two imidazolium-based ionic liquid surfactants (TSIL and EFAIL) were first synthesized, and then investigated the synergistic effects of NaHSO4 and NaCl salts on corrosion inhibition performance of TSIL and EFAIL inhibitors on low carbon steel samples in 1M HCl solution. For this aim, the electrochemical techniques of potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), surface morphology analyses, and quantum chemical calculations were employed. Results showed that adding salts to acidic solutions containing EFAIL and TSIL increased their inhibition efficiency. Furthermore, addition of NaHSO4 to TSIL-containing solution could further increase the inhibition efficiency compared to other mixtures of the salts and the inhibitors. The DFT results also revealed that the energy gap of TSIL is lower than that of EFAIL, implying that TSIL has more chemical reactivity and less kinetic stability than EFAIL.

Micellization of Ionic Liquid Surfactants Induced by Sodium Polystyrenesulfonate in Aqueous Solutions

The aggregation phenomena of two ionic liquid surfactants—1-decyl-3-methylimidazolium chloride (C10MeImCl) and 1-hexadecyl-3-methylimidazolium chloride (C16MeImCl) have been investigated in aqueous solutions in the presence of a polyelectrolyte, sodium polystyrenesulfonate (NaPSS), using electrical conductivity, surface tension, fluorescence and vapor pressure measurements. The counterion-condensation behavior of aqueous NaPSS has also been studied and approximately 62% of the counterions have been found to remain uncondensed in these solutions. The characteristic concentrations signifying different kinds of interactions, namely the critical aggregation concentration and the polymer saturation concentration, in the premicellar regime have been identified. Surface-active complexes with bound surfactant monomers onto the polyion backbone, non-surface active aggregates with small micellar units wrapped by polyion chains, and non-surface active micelles of ionic liquid surfactant monomers, were found to form in aqueous ionic liquid surfactant solutions in the presence of NaPSS. The surfactant concentration where polyelectrolyte–surfactant monomer complexes begin to form (cac), the concentration where the polyion chains get saturated with the small micellar units (psc), and the concentration where micelles of ionic liquid surfactant molecules begin to appear (cmc*) were identified in aqueous C16MeImCl solutions in the presence of NaPSS. Only two critical concentrations, namely the psc, and cmc* were, however, detected in aqueous C10MeImCl solutions in the presence of NaPSS. Effects of alkyl chain length of the ionic liquid surfactants, temperature, NaPSS concentration, and the charge parameter of NaPSS on the self-aggregation of the ionic liquid surfactants have been considered to elucidate the interactions in these mixed systems. The thermodynamics of micellization in these systems have also been studied and the spontaneity of the polyelectrolyte-induced micellization processes have been rationalized for the systems investigated, with the entropy terms superseding the enthalpy terms.

Mixed micellization behaviour of tri-substituted surface active ionic liquid and cationic surfactant in aqueous medium and salt solution: Experimental and theoretical study

The aim of the present study is to investigate the mixed micellization behaviour of trisubstituted surface active ionic liquid (SAIL) 1-tetradecyl-2,3-dimethylimidazolium bromide [C14bmim][Br] and cationic surfactant cetyltrimethylammonium bromide (CTAB) in aqueous solution and in the presence of inorganic salt, sodium bromide (NaBr) using the conductivity, steady-state fluorescence and 1H NMR measurements. The degree of counter-ion dissociation (g), critical micelle concentration (cmc), various thermodynamic parameters of micellization (ΔGm0, ΔHm0 and ΔSm0) have been evaluated from conductivity measurements. All these parameters show that strong synergistic interactions have been observed in the studied mixed systems in the aqueous medium and the presence of salt promotes the electrostatic interactions that result in lowering of cmc values. The aggregation number (Nagg) of mixed micelle has been ascertained from steady-state fluorescence quenching indicate that the contribution of CTAB was always more than that of SAIL. The results have been analysed on the basis of Rubingh, Clint and Motomura theory. Various mixed micellar parameters such as ideal cmc (cmc*), activity coefficients (f1 and f2), micellar mole fraction of CTAB in mixed and ideal state (X1mandX1ideal), interaction parameter (βm) and excess Gibbs free energy of micellization (ΔGex) have been calculated at temperatures of (298.15, 308.15 and 318.15) K. Mixed micellar parameters (cmc*, X1m, and ΔGex) reveal non-ideal behaviour of the mixed system and magnitude of interaction parameter (βm) becomes more negative in the presence of salt. 1H NMR shed light on the electrostatic interactions between CTAB and SAIL in mixed state.

Performance comparison of novel chemical agents in improving oil recovery from tight sands through spontaneous imbibition

Tight sands are abundant in nanopores leading to a high capillary pressure and normally a low fluid injectivity. As such, spontaneous imbibition might be an effective mechanism for improving oil recovery from tight sands after fracturing. The chemical agents added to the injected water can alter the interfacial properties, which could help further enhance the oil recovery by spontaneous imbibition. This study explores the possibility of using novel chemicals to enhance oil recovery from tight sands via spontaneous imbibition. We experimentally examine the effects of more than ten different chemical agents on spontaneous imbibition, including a cationic surfactant (C12TAB), two anionic surfactants (O242 and O342), an ionic liquid (BMMIM BF4), a high pH solution (NaBO2), and a series of house-made deep eutectic solvents (DES3–7, 9, 11, and 14). The interfacial tensions (IFT) between oil phase and some chemical solutions are also determined. Experimental results indicate that both the ionic liquid and cationic surfactant used in this study are detrimental to spontaneous imbibition and decrease the oil recovery from tight sands, even though cationic surfactant significantly decreases the oil–water IFT while ionic liquid does not. The high pH NaBO2 solution does not demonstrate significant effect on oil recovery improvement and IFT reduction. The anionic surfactants (O242 and O342) are effective in enhancing oil recovery from tight sands through oil–water IFT reduction and emulsification effects. The DESs drive the rock surface to be more water-wet, and a specific formulation (DES9) leads to much improvement on oil recovery under counter-current imbibition condition. This preliminary study would provide some knowledge about how to optimize the selection of chemicals for improving oil recovery from tight reservoirs.

Effect of chain length and counter-ion on interaction study of mixed micellar system of isoquinoline-based surface active ionic liquid and cationic surfactants in aqueous medium

In the present study, we have investigated the effect of nature of surfactant, chain length and counter-ion on the mixed micellization behaviour ofvarious cationic surfactants, tetradecyltrimethylammonium bromide (TTAB), dodecyltrimethylammonium chloride (DTAC) and cationic gemini surfactant, bis(tetradecyldimethylammonium)hexane dibromide(C14-6-C14,2Br) with surface active ionic liquid (SAIL) tetradecylisoquinolinium bromide [C14iQuin][Br]. The interactions and mixed micellar behaviour of cationic surfactants and SAIL in aqueous medium have been studied by employing conductometry measurements and 1H NMR technique. The critical micelle concentration (cmc) and various thermodynamic parameters like standard Gibbs free energy of micellization (ΔGm0), change in standard enthalpy (ΔHm0) and entropy of micellization (ΔSm0) have been calculated from conductometry measurements. Mixed micellar parameters such as ideal cmc (cmc*), micellar mole fraction (X1m), micellar interaction parameter (βm) and activity coefficients, (f1 and f2) have been evaluated by applying Clint, Rubingh and Motomura theoretical models. Synergistic and non-ideal interactions have been found between SAIL and surfactants.

Imidazolium-based ionic liquid surfactants as pseudostationary in combination with a chiral selector in micellar electrokinetic chromatography.

In recent years, ionic liquid-based surfactants have drawn more and more attention. As a new promising brand of surfactants, ionic liquid-based surfactants have their unique properties and superior aggregation behavior, which can be introduced as micellar pseudostationary in MEKC mode. In this paper, a novel ionic liquid-based surfactant, 1-butyl-3-methylimidazolum dodecyl sulfate [C4MIm][C12SO4], was synthesized through ion exchange reaction and applied for the first time to form micellar as pseudostationary phase for chiral separation with clindamycin phosphate as chiral selector. As observed, compared with conventional non-ionic liquid anionic surfactant, improved separation of tested drug enantiomers was obtained in the established MEKC system with ionic liquid-based surfactant. Parameters such as concentration of ionic liquid-based surfactants, type and proportion of organic modifier, concentration of chiral selector, and pH of buffer solution were systematically investigated to optimize the ionic liquid-based surfactant MEKC system. Graphical abstract.

Imidazolium‐Based Stabilization of Aqueous Multiwall Carbon Nanotube Dispersions

AbstractImidazolium bromide, an ionic liquid surfactant acrylate, as well as its homopolymer and various copolymers are demonstrated to be superior dispersing aids for preparing aqueous multiwall carbon nanotube (MWCNT) dispersions. We demonstrate apparent complete exfoliation in water with extinction coefficients at 500 nm of about 60 cm2 mg−1 of MWCNT dispersed, a new lower bound and the highest reported extinction to date. The efficacy or efficiency of dispersion (activated by ultrasonication) is examined in terms of a quotient of extinction and weight ratio of the active monomer and MWCNT. A rank ordering of the results obtained for seven stabilizers based on the same imidazolium bromide monomer provides insights into roles of π‐overlap adsorption onto MWCNT surfaces and how hydrogel properties of some of these polymers provide stability in water at higher concentrations than previously considered feasible for surfactant‐stabilized and polymer‐stabilized MWCNT dispersions. Simple nanocomposite film formation is demonstrated by casting and thermal diffusivity and electrical conductivity properties are examined.

Synthesis, characterization, ecotoxicity and biodegradability evaluations of novel biocompatible surface active lauroyl sarcosinate ionic liquids

Ionic liquids (ILs) based surfactants have been emerged as attractive alternatives to the conventional surfactants owing to their tailor-made and eco-friendly properties. Therefore, present study described the synthesis of nine new fatty amino acids based IL surfactants utilizing lauroyl sarcosinate anion and pyrrolidinium, imidazolium, pyridinium, piperidinium, morpholinium and cholinium cations for the first time. The synthesized surface active lauroyl sarcosinate ionic liquids (SALSILs) were characterized by 1H NMR, 13C NMR and TGA. Next, the surface tension and critical micellar concentrations were determined and compared with the surface properties of ILs based surfactants. Further, the toxicity and biodegradability of the synthesized SALSIILs were evaluated to confirm their safe and efficient process applications. The studies revealed that three out of nine synthesized SALSILs containing pyridinium cation have showed strong activity towards the tested microbial growth. The remaining six SALSILs met the biocompatible measures demonstrating moderate to low activity depends on the tested microbes. The alicyclic SALSILs containing morpholinium and piperidinium cations have demonstrated 100% biodegradation after 28 days of the test period. Overall, it is believed that the synthesized SALSILs could effectively replace the conventional surfactants in a wide variety of applications.