2 edition of Ultrasonic and electrochemical studies of surfactant aggregation in aqueous solution. found in the catalog.
Ultrasonic and electrochemical studies of surfactant aggregation in aqueous solution.
W. A. Wan Badhi
PhD thesis, Chemistry.
Abstract. Bilayer swelling behavior of nonionic and anionic surfactant mixed aqueous solution induced by adding glycerin was studied. The phenomenon were performed on a system, polyethylene glycol ether of tridecyl alcohol with the average number of ethylene oxide of 5 (CH 3 (CH 2) 12 (OCH 2 CH 2) 5 OH; abbreviation IT5) and SDS mixed aqueous solution, with white cream of the . ionic surfactants are dissolved as electroneutral molecules, e.g. higher fatty alcohols or cholesterol which have polar hydroxyl groups. Ionic surfactants dissociate in aqueous solutions into pairs of 2 cations and anions, but usually only one kind of these ions are surface active, and ions with the opposite charge are called counterions.
This book is the premier text on the properties and applications of surfactants. The third edition is completely updated and revised, including new information on gemini surfactants (a new type of powerful surfactant), superspreading (or superwetting) by aqueous surfactant solutions of highly hydrophobic surfaces (important in agricultural applications), and dynamic surface tension (an. An improved critical micelle concentration (cmc) prediction model is developed and validated to study micellization of various pure and mixed surfactants in aqueous solution containing salts ( M).Title: Research associate at University .
Full Text Thermodynamics of self-aggregation of mixed cationic gemini/sodium deoxycholate surfactant systems in aqueous solution: The cross-linking action of gemini surfactant by Wang, Yujie and Wang, Yujie and Wu, Hui and Wu, Hui and Wang, Jiuxia and Wang, Jiuxia and Lou, Pengxiao and Lou, Pengxiao and Zhao, Yang and Zhao, Yang and Bai. Now in its fourth edition, Surfactants and Interfacial Phenomena explains why and how surfactants operate in interfacial processes (such as foaming, wetting, emulsion formation and detergency), and shows the correlations between a surfactants chemical structure and its action. Updated and revised to include more modern information, along with additional three chapters on Surfactants in Biology.
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Electrochemical behavior of malachite green (MG) oxalate in aqueous solution was studied in the presence of a cationic surfactant, cetyltrimethylammonium bromide (CTAB), and an anionic surfactant, sodium dodecyl sulfate (SDS) at a glassy carbon electrode using cyclic voltammetry.
The electrochemical oxidation of MG has been characterized as an electrochemically irreversible diffusion Cited by: 5. Request PDF | Studies on Acoustic and Aggregation Properties of Sodium Dodecyl Sulfate in Amino Acid Solutions through Ultrasonic Velocity Technique | Acoustic and aggregation.
The sonication−centrifugation technique is commonly used for dispersing single-walled carbon nanotubes (SWCNTs) in aqueous surfactant solutions. However, the methodologies and materials used for this purpose are widely varied, and few dispersive agents have been studied systematically.
This work describes a systematic study into the ability of some well-known (and some less common Cited by: Aggregation behavior of Dioctadecyldimethylammonium chloride in mixed cationic surfactant system.
apparent molar volume and compressibility studies of cetyltrimethylammonium bromide in aqueous solution of leucine. Journal of Molecular Liquids, Electrochemical Pumping of DMF Electrolyte Solutions across by: Using a drug-selective membrane electrode it has been shown that the cationic drug chlorocyclizine hydrochloride forms a 1: 1 inclusion compound with α-cyclodextrin in aqueous solution.
The drug also forms mixed micelles with cetyltrimethylammonium bromide, and the partition coefficient of the drug between aqueousCited by: Interactions between hyaluronan and the cationic surfactant Septonex were studied using high resolution ultrasound spectroscopy.
Four different interaction regions were identified in aqueous solution in a narrow interval of surfactant concentrations. In contrast, in mol/L NaCl solution, essentially only two principal regions were observed. The optimal parameters for ultrasonic electrochemical treatment of difficult-to-settle slime water are as follows: The electrolysis current is A, the electrolysis time is 5 min, the energy density is W/cm 3, the ultrasonic time is 4 min, 3.
Study on new treatment technology for difficult-to-settle slime water Mineral-hardness method. Regarding applications with surfactants in electrochemistry, EIS has been widely used for the study of the inhibition of corrosion by surfactant coatings [84, 85], the investigation of ionic surfactant selective electrodes, the effect of anionic and cationic surfactants in the performance of batteries and the study of electrochemical reactions.
High-Q high-resolution ultrasonic spectroscopy is used to detect the onset of aggregation in asphaltene solutions and micelle formation with standard surfactants.
This technique allows determination of the speed of sound in solution to a fewparts in a million. The interactions between the anionic surfactant sodium dodecyl sulfate (SDS) and a hydrophobically modified non ionic polymer, methylcellulose (MC), have been investigated in aqueous solution by.
The end-capped telechelic HEUR associative polymer was reported to exhibit a single mode Maxwell typed relaxation behavior. suggested that the single mode Maxwell relaxation time corresponded to the lifetime of the hydrophobe in the micellar junction.
However, results from some recent publications suggested that a more complex relaxation behavior existed. The self-aggregation of a series of non-ionic surfactants in aqueous solutions and solubilization of flavonoid into micelles was theoretically examined using a molecular dynamic method.
Six models of surfactants, with systemically growing polyoxyethylene parts, were used: mono- di- tri- tetra- penta- and deca-ethylene glycol decyl ether.
Aggregation behavior of surfactant in solvents other than water (non aqueous) is considerably dependent on solvent polarity and its ability to form hydrogen bond in solution. Micellization can be possible in solvents such as ethylene glycol, hydrazine, formamide, glycerol, which have high degree of hydrogen bonding [6,7,8,9].
In order to investigate the effect of ionic surfactant on the dynamic properties of nonelectrolyte aqueous solutions, the ultrasonic absorption, velocity and the conductivity have been measured for.
In the present study, AgNPs were synthesized by a combination of two schemes, namely, the electrochemical synthesis of stabilized metal clusters 18 and the reduction of AgNP by methanol.
12,29,35 In the scheme 1 18 a two-electrode setup containing 15 mL of electrolyte solutions was used. The anode consisted of a bulk Ag metal to be transformed.
Adsorption microcalorimetry used to study interfacial aggregation of quaternary ammonium surfactants (zwitterionic and cationic) on powdered silica supports in dilute aqueous solutions Jerzy Zajac Colloids and Surfaces A: Physicochemical and Engineering AspectsThe roles of cationic and anionic surfactants in assembling reduced graphene oxide hydrogels (RGOHs) and controlling their porous structures are studied in this work.
The mechanisms of the surfactant effects were studied by x-ray diffraction, Fourier transform infrared spectroscopy, x-ray photoelectron spectroscopy, and electrochemical methods. Ultrasonic absorption was measured in hexane solutions of octylammonium alkanoates (nonanoate, decanoate, dodecanoate, and tetradecanoate).
The value of critical micelle concentration (CMC) was determined to be M (1 M=1 mol dm −3) for all the excess ultrasonic absorption, observed in the solutions above the CMC, was ascribed to the association-dissociation of the.
The suspensions of S NPs for both the electrochemical and the DLS measurements were prepared directly in the electrochemical cell by acidification (to pH ≈ 2 by HCl, Kemika, Croatia) of sodium tetrasulphide (Na 2 S 4) (Alfa Aesar, USA) solutions in deaerated mol∙dm −3 NaCl (Kemika, Croatia) used as supporting electrolyte.
All electrochemical and DLS measurements were performed. The pH value of copolymer solution plays a great role on adsorption, which indicates that the electrostatic action is the main adsorption mechanism of CMC based polymeric surfactants.
Key words: Polymer surfactant, Carboxy methyl cellulose, Adsorption mechanism, Solid/liquid interface. Binding isotherms for various sodium dodecyl sulfate–polyvinylpyrrolidone mixtures have been constructed from electrochemical measurements involving a dodecyl sulfate-selective membrane electrode.
It was found that once the surfactant starts to bind to the polymer, small surfactant aggregates are formed. These aggr.Surfactants in Solution: Volume 9 Colja Laane, Matthijs Dekker (auth.), Dr. Kashmiri Lal Mittal (eds.) This and its companion volumes 7,8, and 10 document the proceedings of the 6th International Symposium on Surfactants in Solution (SIS) held in New Delhi, India, Augustunder the joint auspices of the Indian Society for Surface.Then, around g of cement and 20 mL of solution (with or without surfactant) were mixed by hand-shaking for about 15 s followed by ultrasonic treatment for min.
Subsequently, 1 mL of suspension was transferred into the measuring cell for zeta potential measurement.