Abstract Focusing on the leakage problem in high temperature and high salinity oil fields (reservoir temperature 120 °C – 130 °C, formation water salinity 220 000 mg/L), a gel-blocking system is pr...

Abstract The Cloud Point Extraction (CPE) of Pb(II) ion, using Triton X-114/alanine and Triton X-114/phenyalanine as biodegradable systems, was carried out. The experimental results are expressed b...

Abstract Many studies have been conducted on the removal of heavy metals from industrial wastewater using biosurfactants, but few papers have been published on the removal of heavy metals from soil...

Abstract Micelles and 4d- or 5d-transition metal ions have been proved to be effective catalysts for the oxidation of 1-pentanol by Ce(IV) in aqueous medium under pseudo 1st order reaction conditio...

Abstract The aim of this study was to establish a simple model describing the microbial reduction of a cleaning process by only using physical parameters of a given cleaning process (time and tempe...

Abstract The “Recommendations for the Quality Assessment of the Cleaning Performance of Dishwasher Detergents” provide detailed procedures to assess the performance of a household dishwasher deterg...

Abstract The effect of oxyethylene groups on the adsorption properties of fatty alcohol polyoxyethylene ether sodium sulfate with narrow ethylene oxide distribution (AEmS, m = 3, 5, 7, 9) was chara...

Abstract The surface tension, pH and contact angle of the wetting liquid as well as the complex composition of the leaf surface are important parameters to describe the spreading, wettability and a...

Abstract Hemp seed oil has good sun protection, repair, anti-allergy and anti-aging effects, and is a high quality raw material for the production of skincare products. However, the influence of su...

Abstract The paper studies the influences of two cationic surfactants – cetylpyridinium chloride (CPCl) and cetylpyridinium bromide (CPBr) – at concentrations 10-times below and 10-times above the ...

Abstract The kinetics of the reaction methionine+cumene hydroperoxide in the presence of nonionic surfactant was studied both in the pre-micellar and post-micellar regions at different temperatures by iodometry. It was established that the rate of the methionine + cumene hydroperoxide reaction depends on the molecular/ionic/micellar form of surfactant in the reaction system. In the post-micellar region

Abstract The synthesis of branched-chain alkyl polyglucosides (APG) from 2-butyl-1-octanol, a Guerbet alcohol, in an acid/phase transfer catalyst (PTC) system was studied. Under optimized conditions the conversion rate of this reaction was 98.4% and the selectivity 16.5:1 (APG to polysaccharide, w/o). The APG was characterized by HPLC, LC/MS and 1HNMR. The surfactant properties showed that the wetting

Abstract In the present study, three amide Gemini surfactants of different chain lengths were synthesized, namely N,N-bis-dodecyl-2,6-pyridinium dimethylamide propionate sodium (DLP-12), N,N-bis-tetradecyl-2,6-pyridinium dimethylamide propionate sodium (DLP-14) and N,N-bis-hexadecyl-2,6-pyridinium dimethylamide propionate sodium (DLP-16). Their chemical compositions and structures were characterized

Abstract The formulation of gypsum foaming agents using alkyl polyglucosides (APG) as main surfactant was studied. The foaming behavior of the foam compound system and the stability of the foam were determined by experiments. The foaming property of APGs with various carbon chain lengths and of APGs in mixtures with other surfactants, such as cocoamidopropyl betaine (CAB), sodium lauryl amphoacetate

Abstract The present study is an investigation of the solubilising ability of natural and conventional surfactants saponin (sapindus saponin or reetha saponin), Rhamnolipids (RLs) and N-cetylpyridinium chloride (CPC) respectively via dye-surfactant interaction. The ionic dye Congo Red was examined by absorption spectroscopy method for the study. The dye interacted strongly with oppositely charged surfactant

Abstract It is important to study the mechanism of wettability of Zhaozhuang coal with surfactant compoundings in order to prevent dust disaster in the process of coal seam mining. By means of molecular simulation, the amounts of water absorbed by different systems, which are composed of monomer surfactant molecules and Zhaozhuang coal molecules or compounding surfactant molecules and Zhaozhuang coal

Abstract We have studied the effect of NaCl and CaCl2 on phase behavior of foaming aqueous dispersions containing mixtures of silica nanoparticles (Ludox CL) and sulfobetaine (LHSB). At the evaluated ratio, the phase behavior results show that at a low CaCl2 concentration, sedimentation occurs, whereas a stable aqueous dispersion could be achieved when the CaCl2 concentration reaches to 20%. The adsorption

Abstract Two series of well-defined dimeric metallo-bolaamphiphiles (bola surfactants) with the coordinated metal ions (Cu, Co, Zn) were prepared. These oligomeric surfactants consist of simple monomeric cationic surfactant fragments which are coupled via the hydrophilic ammonium chloride head groups by C6 and C12 spacer groups of different lengths. FTIR and 1HNMR identification techniques confirmed

Abstract In this work, we report the application of coconut oil derived N-acyl prolinate surfactant as a potential ingredient in laundry detergent formulation using biological, physicochemical and molecular docking approach. The properties of the sodium cocyl prolinate surfactant 2 were compared with those of sodium cocoate surfactant 1, a sodium salt of fatty acids from coconut oil, as well as the

Abstract Antioxidant substances are used not only in food and beverages, but also in soap formulations which are known to be effective in skin cleansing, and are also used as ingredients in the detergent and cosmetics market. The aim of this study was to determine the bactericidal effects of plain and antibacterial soaps containing Punica granatum flower (PGF), Carrot seed (CS, Daucus carota), Lavender

In this study, 16 acylamino acid surfactants carrying glycine, alanine, valine, and leucine residues were synthesized in the desired yields in an environmentally friendly manner using vegetable oils and beef tallow as acyl donors. The quantitative compositional analyses of these surfactants were performed using HPLC/MS, and the results were consistent with the fatty acid compositions of the corresponding

In the present study, a series of gemini surfactants with amide group (abbreviated as (m = 12–16, n = 1, 2)) were synthesized. Complementary characterizations of their structure by spectroscopic methods such as IR, 1H-NMR, MS, and investigations of their properties such as measurements of the conductivity, the surface tension, the foaming and the emulsifying capacity were performed. The results showed

A surfactant mediated cloud point extraction (CPE) has been developed to remove color from wastewater containing toxic Eosin Y dye, using Triton X-114 (TX-114) as nonionic surfactant. Most of the dye molecules become solubilized in the coacervate phase leaving dilute phase free of dyes. The effects of surfactant concentration, temperature and salt concentration on the extraction yield of the dye have

The PDMC colloid (PDMC = poly(methacryloyloxyethyl trimethylammonium chloride) is a polyquaternary ammonium salt that is homopolymerized by methacryloyloxyethyl trimethyl ammonium chloride (DMC). The polymerization was carried out in aqueous solution, which was characterized by one-off feeding, a redox initiator system and segmented temperature control. The molecular structure of PDMC was characterized

Cationic flavor microcapsules were synthesized with tetradecyl allyldimethyl ammonium bromide (TADAB) as main shell material by emulsion polymerization. Methyl methacrylate (MMA), polyoxyethylene alkyl ether, and pentaerythritol tetraacrylate (PETRA) were applied as co-monomer, emulsifier and crosslinking agent, respectively. The polymerization reaction was proved by Fourier transform infrared spectroscopy

Oxidation of cyclohexanol, a six membered cyclic alcohol, by Ce(IV) is a slow-moving reaction. Therefore, it was investigated in a comparative study whether the oxidation rate can be increased by adding trace amounts of Ru(III) and Ir(III) metal catalysts in anionic (sodium dodecyl sulfate) and cationic (cetylpyridinium chloride) micellar media. The kinetics of the oxidation of cyclohexanol with Ce(IV)

The equilibrium and dynamic surface properties and the adsorption behavior of alkyl glycosides and their derivatives alkyl glycoside tartarates at the air/water solution interface were investigated. The equilibrium surface tension and the critical micelle concentration were measured by Wilhelmy plate method and the dynamic surface tension was measured by maximum bubble pressure method. The data display

A series of alkyl polyglycoside polyoxypropylene ethers (APGPE-n) has been prepared by propoxylation of alkyl polyglycoside (APG). The structure, the physical and application properties of alkyl polyglycoside polyoxypropylene ethers were investigated and compared with the APG raw material to highlight the effect of propylene oxide (PO) addition on the chemo-physical properties of the surfactants.

The glucose-based cationic-nonionic surfactant (GCN) and Ag-SiO2 nanocomposites were prepared and the interfacial tension and foaming properties were investigated. Besides, the structures of GCN were confirmed by Fourier transform infrared spectrometer and 1H nuclear magnetic resonance. The synthesized Ag-SiO2 was characterized by X-Ray diffraction and transmission electron microscope. The performance

Abstract Herein, we investigated the micelle formation of mixed systems of the antipsychotic drug, chlorpromazine hydrochloride (CPZ), and the bile salt, sodium deoxycholate (NaDC), both in the absence and presence of NaCl by tensiometry. To understand the aggregation behaviour of the mixture of these two amphiphiles, we calculated various micellar and interfacial parameters using the theories of Clint

Abstract Hemp seed oil has a very better effect of sunscreen, repair, anti-allergy and anti-aging, as a result of which it is a high-quality raw material for skin care products. In this study, the oxidation degree of hot-pressed and cold-pressed hemp seed oil which was stored in five different environments, was evaluated. The results showed that the long-chain unsaturated fatty acids were oxidized

Abstract The surface properties of the binary mixture of cetyl diphenyl ether disulfonate (C16-MADS) and linear alkylbenzene sulfonate (LAS) have been investigated by salinity and hardness tolerance, equilibrium surface tension, wettability, foam and emulsification measurements. The results show that with increasing mass ratio of LAS in the C16-MADS/LAS mixed system, the ability to reduce the surface

Abstract In this paper, three kinds of aliphatic alcohol polyoxyethylene ethers (AEO) with different molecular weight distribution were used as raw materials, and aliphatic alcohol polyoxyethylene ether phosphate (AEP) was obtained by P2O5 process. FT-IR and 31P-NMR were used to characterize the structure of the product, confirming the formation of the product. HPLC-ESI was used to probe the molecular

Abstract Chitosan is an abundant and renewable natural biopolymer which exhibits a variety of beneficial properties. Quaternized chitosan compound was extensively studied as an antistatic agent in cosmetics and hair care products such as in hair conditioners and fabric softeners. However, the low solubility of chitosan in water limits its applications. This paper describes a novel way to synthesize

Abstract The application of phosphate compounds as a builder in a detergent formulation created eutrophication that encouraged industry to produce more eco-friendly detergents. To overcome that problem, phosphate can be substituted by zeolit that is more effective in cleaning and also biodegradable. In this study, zeolite was synthesized from rice husk ash using a melting method followed by hydrothermal

Abstract Under the aspect of strict environmental regulations, hydrotropy is accepted as an environmentally friendly (“green”) approach to solubilise hydrophobic compounds. Above the minimum hydrotrope concentration (MHC), hydrotropes are capable of self-aggregation; the MHC is considered the minimum requirement for solubilisation. In this article a comprehensive overview of the aggregation behaviour

Abstract Non-ionic carbohydrate based gemini surfactants with rigid aromatic spacer CH2-Ar-CH2, which carry two hydrophobic tails of different tail lengths (C12, C14 and C16) and two sugar moiety polar head groups were synthesized and their reverse micellar behavior for solubilization of some aromatic α-amino acids viz. histidine (His), phenylalanine (Phy), tyrosine (Tyr) and tryptophan (Trp) in n-hexane

Abstract Olive oil was selected as the oil substrate and hydrolyzed by Candida sp. 99–125 lipase. The hydrolysis rate of olive oil was used as an indicator. Based on the single factor experiment, the effects of dosage of Candida sp. 99–125 lipase, reacting temperature, pH value and water-oil ratio were investigated. Box-Behnken center combination and response surface methodology were utilized to optimize

Abstract In this work, we have investigated the washing performance of sodium oxalate-based detergents containing different enzymes (protease, lipase and cellulase). The results show that sodium oxalate-based detergents with enzymes have a better washing performance than formulations containing the conventional builder STPP and zeolite 4A. For sodium oxalate-based with protease, the amount of sodium

Abstract In this study a solvent extraction method is used to investigate the succesive removal of a binary mixture of the cationic dyes Basic Yellow-2 (BY) and Basic Blue-26 (BB) from textile effluents by the anionic surfactant sodium dodecylsulfate (SDS) and isoamyl alcohol as an organic solvent. The dye ions are encapsulated in the core of the reverse micelles which remain in the organic phase and

Abstract Microorganisms have the remarkable capacity to develop resistance to antimicrobial agents. This is of particular concern for fungal pathogens which cause devastating invasive infections with limited treatment options. Thus the need for new antifungal agents is undeniable. This work presents the antifungal properties of four surfactant groups, namely two groups of sulfobetaines and two groups

Abstract Cationic polyacrylamide (CPAM) was prepared in aqueous solution by free radical polymerization of methacryloyloxy ethyl trimethylammonium chloride (DMC) and acrylamide (AM). A redox initiator system was used. The structure of CPAM was characterized by IR and 1H NMR. The intrinsic viscosity and cationicity of CPAM were measured by an Ubbelohde viscometer and titration experiments, respectively

Abstract In this study synergistic effect of the biosurfactants saponin and rhamnolipid on the removal of the heavy metals such as vanadium, nickel and chromium from contaminated soil was investigated. Washing solutions were prepared by using different concentrations of two biosurfactants. In this work, the optimum HLB value of the extraction process of about 10.5 was obtained for the mixture of 62

Abstract The composition and solubilization of the optimum microemulsion systems containing Triton X-100/pentan-1-ol/aliphatic hydrocarbon/water were studied with the ∊-β fishlike phase diagram method. The solubilities of the alkanol (SA), the mass fractions of the alkanol in the interfacial layer (AS) and the optimum solubilization parameters (SP∗) of the microemulsion systems with different aqueous

Abstract A single borate ester additive sometimes fails to meet the requirements of modern working conditions, it needs two or more additives for the use. Two N-containing heterocyclic borate esters, 2-(1H-benzotriazol-1-yl) ethyl bis(2-aminoethyl) borate (BEB) and bis-(2-amionethyl) (2-benzothiazol-2-ylthio)ethyl borate (MEB) have been synthesized. Their tribological properties were studied by a four-ball

Abstract This study is aimed to examine the quality of beauty soap bars available to the consumers in Pakistan. A range of soap bars manufactured by local small-scale manufacturers from Pakistan were analyzed for their physiochemical properties such as pH, foaming, total fatty substances, matter insoluble in alcohol, free fatty acids, total alkali and moisture contents. The quality of the Pakistani

Abstract The Fischer-Tropsch synthesis can be used to achieve a high content of α-olefin (C5–C11) products using Fe-based catalysts. Herein, C6 and C8 α-olefins have been selected as examples for the alkylation of benzene catalyzed by using an acidic ionic liquid (Et3NHCl-AlCl3) to obtain a variety of intermediates used to prepare surfactants. A series of alkylbenzenes were synthesized by controlling

Abstract The microenvironment of water droplets of nonionic polyoxyethylene (4) lauryl ether reverse micelles was investigated with infrared and ultraviolet-visible spectroscopy, also by viscosity and dynamic light scattering measurements in the presence of biological surfactant sodium cholate as additive. Influence of concentrations of polyoxyethylene (4) lauryl ether and sodium cholate on the microstructure

Abstract In order to expand the application range of surfactants, octadecyl trimethyl ammonium chloride (OTAC) and polyacrylic acid (PAA) were used as raw materials to synthesize octadecyl trimethyl ammonium polyacrylic (OTAP). The molar ratios of OTAC to polyacrylic acid monomer were 1:1, 1:2 and 1:3. The synthesized compounds were named as OTAP-1, OTAP-2, OTAP-3. The obtained research results show

Abstract Modern science and technology promote synthesis routes which are eco-friendly, chemicals which are promoted as “green” and solvents which are less toxic. A convenient method for the synthesis of ether by the reaction of 4-hydroxy benzoic acid and benzyl chloride using a surfactant as catalyst has been developed. The targeted ether is completely immiscible in water but in association with the

Abstract The paper presents a system-based approach for predicting the changes of the plasma concentration and the therapeutic effect of sodium p-aminosalicylate caused by addition of surfactant Tween 80 to a liquid dosage form. A predictive pharmacokinetic model of the oral administration is synthetized together with the corresponding model of its parametric sensitivity. The sensitivities predicted

Abstract The inhibition effect of three inhibitors with different chain lengths of their ether groups on Q235 steel in 0.5 M HCl solution at 318 K was determined by means of weight loss measureme nt, electrochemical methods (Tafel and EIS) and surface analysis (SEM). Moreover, the further study of corrosion inhibition mechanism was also conducted by computational methods (Quantum chemical calculations

Abstract Sugar oxime ether surfactants are a new class of surfactants produced by the reaction of a sugar with a hydrophobic alkoxyamine, producing an oxime ether linkage. We examined nine examples of this class of surfactants. The sugars used were maltose, sucrose, and glyceraldehyde; the alkoxyamines were decyloxyamine, dodecyloxya mine, and adamantyloxyamine. For the resulting surfactants we determined

Abstract This manuscript describes a responsive, rapid, validated and economical spectrofluorimetric method for determination of Melphalan in its pharmaceutical dosage forms and spiked human plasma. The proposed method is relied on the investigation of fluorescence action of Melphalan in Tween-80 micellar system. The Melphalan shows strong native fluorescence at λem 365 nm upon excitation at λex 265

Abstract Cationic quaternary ammonium surfactant s are widely applied in many fields, such as detergent, cosmetics, petroleum and natural gas industries. However, the study of the effect of anion on cationic surfactants is rare. To research the influence of anions on the surface properties, a cationic surfactant was prepared, (cetyltrimethyl ammonium isonicotinate, CTAIN), and the surface properties

Abstract Most research interests focused on the development of non-toxic and environmentally green corrosion inhibitors. In this work, three environment friendly corrosion inhibitors based on cinnamaldehyde named N,N-dimethyl-N-(2-((3-phenylallylidene) amino)ethyl)octan-1-aminiumbromide (PhAEO), N,N-dimethyl-N-(2-((3-phenyl allylidene) amino)ethyl)decan-1-aminiumbromide (PhAED) and N,N-dimethyl-N-(2-

Abstract Herein, synthesis of rhamnolipid surfactants was performed using a non-pathogenic Pseudomona s putida strain cultured on a variety of waste frying oils (WFOs) under Taguchi multi-objective optimization design. The effect of substrate types, fermentation setups and incubation time on the biomass concentration, rhamnolipid yield and surface tension of the cultivate media has been investigated

Abstract Mixtu res of the anionic surfactant AEC7-Na (branched alcohol ether carboxylate) and the cationic surfactant didecylmethylhydroxyethylammonium chloride (DEQ) were systematically investigated. The results showed that the mixtures possess synergisms. The DEQ-AEC7-Na mixture with a mass ratio of 1:1 showed the best result in terms of surface activity, wettability and emulsifying performance.

Abstract Effect of optically active dopants on the morphologic and optical refracting properties of the lyotropic liquid crystalline mesophase with anisometric micelles has been investigated. Lyotropic lamellar mesophases, which are formed by the plate-like micelles of quasi-indef inite diameter, were objects of the investigations. Wine acid (WA) and tartaric acid (TA) were used as the optically active

Abstract A quaternary ammonium salt gemini surfactant (C12N)2O with diethyl ether as the spacer group was synthesized by dodecyl dimethyl amine and 2-chloroethyl ether. The structure of the product was confirmed by Fourier transform infrared spectra (FT-IR) and proton nuclear magnetic resonance spectra (1H NMR), which showed that the structure of the synthesized product was consistent with the theoretical