• nonionic surfactant phase behavior youtube

    Nonionic Surfactant Phase Behavior YouTube

    2018-01-10· Gel formation can be a challenge for formulators working with nonionic surfactants. This video provides an overview on specific types of liquid-crystal phase...

  • nonionic surfactant phase behavior on vimeo

    Nonionic Surfactant Phase Behavior on Vimeo

    2017-10-06· One challenge that formulators can face when working with nonionic surfactants is the formation of gels, some of which can be persistent and difficult to dissolve. Such gels can occur when liquid-crystal phases are formed during the mixing of surfactant

  • a correlation for phase behavior of nonionic surfactants

    A correlation for phase behavior of nonionic surfactants

    The present study details the behavior of such systems with nonionic surfactants, including the variables: temperature, alcohol type and concentration, added electrolyte, ethylene oxide number of the surfactant, alkane molecular weight for the oil phase, and the hydrophobic molecular weight for the surfactant.

  • phase behavior of polyoxyethylene trisiloxane surfactant

    Phase Behavior of Polyoxyethylene Trisiloxane Surfactant

    A phase diagram of the polyoxyethylene trisiloxane surfactant−water system was constructed as a function of polyoxyethylene (EO) chain length at 25 °C. The HLB (hydrophile−lipophile balance) of surfactant corresponds to the volume ratio of the EO chain to that of surfactant molecule (φEO/φS), where φS and φEO indicate the volume fractions of surfactant and hydrophilic moiety in the

  • complex phase behavior in solvent-free nonionic surfactants

    Complex Phase Behavior in Solvent-Free Nonionic Surfactants

    1996-02-16· The general phase behavior in these materials resembles that of both higher molecular weight block copolymers and lower molecular weight nonionic surfactant solutions. Two of the block copolymers exhibited thermally induced order-order transitions and were studied in detail by small-angle scattering. The fundamental microstructural spacing was

  • nonionic surfactant phase behavior. the effect of ch3

    Nonionic surfactant phase behavior. The effect of CH3

    2008-01-28· In addition, a phase diagram is given for the conventional nonionic C 12 EO 2. Changing OH to OMe has a drastic effect on phase behavior at higher temperatures (>50°C), reducing mesophase upper temperature limits and the cloud temperture (T c) by 20–30°C. Phase transitions that occur below 20°C and the mesophase sequence with increaseing

  • surfactants, phase behavior request pdf

    Surfactants, Phase Behavior Request PDF

    The study of surfactant phase behavior consists in the determination of the number, composition, and structure of phases formed by surfactant systems at a given set of conditions (pressure

  • surfactants, phase behavior springerlink

    Surfactants, Phase Behavior SpringerLink

    Phase is any part of a system that is uniform in physical state, chemical composition, and internal structure. The study of surfactant phase behavior consists in the determination of the number, composition, and structure of phases formed by surfactant systems at a given set of conditions (pressure, temperature, and system composition), in observance of Gibbs phase rule.

  • phase behavior of surfactant an overview sciencedirect

    Phase Behavior of Surfactant an overview ScienceDirect

    By way of illustration, in fig. 4.4 we present a schematic phase diagram representing the non-ionic surfactant C 12 E 5. On the abscissae axis we have the temperature, which is the major control parameter for this surfactant, whereas on the ordinate axis the surfactant concentration is plotted in roughly logarithmic co-ordinates. It is

  • review on surfactant flooding: phase behavior, retention

    Review on Surfactant Flooding: Phase Behavior, Retention

    Surfactant flooding is an important technique used in enhanced oil recovery to reduce the amount of oil in pore space of matrix rock. Surfactants are injected to mobilize residual oil by lowering the interfacial tension between oil and water and/or by the wettability alteration from oil-wet to water-wet. A large number of cationic, anionic, non-ionic, and amphoteric surfactants have been

  • surfactants, phase behavior request pdf

    Surfactants, Phase Behavior Request PDF

    The study of surfactant phase behavior consists in the determination of the number, composition, and structure of phases formed by surfactant systems at a given set of conditions (pressure

  • phase behavior of oleyl oleate with nonionic

    Phase Behavior of Oleyl Oleate with Nonionic

    Sulaiman et al. [9] studied the ternary phase diagrams of oleyl oleate with nonionic surfactants . The presence of a larger percentage of high HLB value surfactant (polyoxyethylene sorbitan mono

  • changes in phase behavior from the substitution

    Changes in Phase Behavior from the Substitution

    Changes in Phase Behavior from the Substitution of Ethylene Oxide with Carbon Dioxide in the Head Group of Nonionic Surfactants Vivian J. Spiering,*[a] Aurora Ciapetti,[a] Michelle TupinambaLima,[b] Dominic W. Hayward,[a] LaurenceNoirez,[c] Marie-Sousai Appavou,[d] Reinhard Schom-cker,[b] and Michael Gradzielski*[a] Introduction

  • structure and phase behavior of polymer loaded non

    Structure and phase behavior of polymer loaded non

    2016-04-12· We investigate the structure and phase behavior of C12E4 based reverse water in octane microemulsions with small angle x-ray scattering

  • phase behavior in systems of nonionic

    PHASE BEHAVIOR IN SYSTEMS OF NONIONIC

    The phase diagram of the C 12 H 25 (OCH 2 CH 2) 5 OH/water/tetradecane system was studied around the critical solution temperatures of surfactant-water and surfactant-oil phases. Although the phase behavior is very complicated due to the formation of liquid crystalline phase, basic phase-changes around the three-phase region, consisted of a

  • effects of urea on the microstructure and phase behavior

    Effects of urea on the microstructure and phase behavior

    2010-09-29· Urea unfolding curves of membrane proteins are usually measured at a constant surfactant concentration 29, and such studies do not address the effect of urea on the surfactant phase behavior. When a concentration path in an unfolding experiment also crosses the CMC, or another condition where micellar structure changes, complications in

  • phase behavior of bicontinuous and water/diesel fuel

    Phase Behavior of Bicontinuous and Water/Diesel Fuel

    (2015). Phase Behavior of Bicontinuous and Water/Diesel Fuel Microemulsions Using Nonionic Surfactants Combined with Hydrophilic Alcohol Ethoxylates. Journal of Dispersion Science and Technology: Vol. 36, No. 1, pp. 10-17.

  • effect of surfactant and surfactant blends

    Effect of surfactant and surfactant blends

    2011-06-01· Methods: Nonionic surfactant blends of Tween ® and Tween ® /Span ® series were screened based on their solubilization capacity with water for palm kernel oil esters. Tween ® 80 and five blends of Tween ® 80/Span ® 80 and Tween ® 80/Span ® 85 in the hydrophilic-lipophilic balance (HLB) value range of 10.7–14.0 were selected to study the phase diagram behavior of palm kernel oil esters

  • molecular dynamic computer simulations of phase

    Molecular Dynamic Computer Simulations of Phase

    2002-03-15· Aggregation without aggravation: A rapid and accurate estimation of the phase structure of amphiphilic molecules is made possible with a new computer simulation technique that excellently reproduces the aggregation behavior of such compounds.For dodecyldimethylamine oxide it is demonstrated how the micellar, hexagonal (see picture for isodensity profile), and lamella surfactant

  • an aqueous anionic/nonionic surfactant two-phase

    An aqueous anionic/nonionic surfactant two-phase

    Aqueous binary surfactant solutions, based on the cloud point phenomenon, have been utilized to design efficient extraction of a variety of substances. In this study, the effect of the anionic surfactant sodium dodecyl sulfate (SDS) on the clouding behaviour of aqueous nonionic surfactant

  • interaction of hydrophobically modified polymers

    Interaction of hydrophobically modified polymers

    The phase behavior, membrane rigidity, compression modulus, and bilayer mean bending modulus are found to be independent of molecular weight, polydispersity, and hydrophobe length of hm-polymers. The rigidity and compression moduli of membranes increase with increasing polymer concentration and hydrophobe substitution level. A minimum hydrophobic interaction strength (combination of

  • nonionic surfactant cloud point youtube

    Nonionic Surfactant Cloud Point YouTube

    2018-03-02· One characteristic property of nonionic surfactants in water is Cloud Point, the onset of cloudiness as temperature is raised. Clouding results from decreasing hydration of oxyethylene headgroups

  • correlation for phase behavior of nonionic surfactants

    Correlation for phase behavior of nonionic surfactants

    The present study details the behavior of such systems with nonionic surfactants, including the variables: temperature, alcohol type and concentrations, added electrolyte, ethylene oxide number of the surfactant, alkane molecular weight for the oil phase, and the hydrophobic molecular weight for the surfactant. 28 references.

  • phase behavior of engkabang fat with nonionic

    Phase Behavior of Engkabang Fat with Nonionic

    Abstract Phase behavior of engkabang fat was determined through the construction of ternary phase diagrams using nonionic surfactants. Several phase regions appeared in the ternary phase diagrams such as isotropic, homogenous, liquid crystal, two phase and three phase regions. The increase of hydrophilic-lipophilic balance (HLB) values of the nonionic surfactants used gave larger isotropic

  • phase behavior of nonionic surfactant/oil/water

    Phase Behavior of Nonionic Surfactant/Oil/Water

    The phase behavior of nonionic ethoxylate surfactant/light alkane/water systems is reported in detail. In compressible liquids such as propane, phase transitions which are normally induced by changing temperature or salinity can also be accomplished with pressure A complete transition from a lower to middle to upper phase microemulsion with pressure is reported for the first time in propane.

  • predicting microemulsion phase behavior for surfactant

    Predicting Microemulsion Phase Behavior for Surfactant

    The results indicate the significance of HLD-NAC equation of state in not only shorten the surfactant screening processes for formulators, but also predicting microemulsion phase behavior based on surfactant structure. A compositional reservoir simulator with such an equation of state will increase its predictability and hence help with the

  • monodisperse perfluoroalkyl oxyethylene nonionic

    Monodisperse Perfluoroalkyl Oxyethylene Nonionic

    The results of phase behavior in aqueous binary systems are discussed. As expected, the replacement of OH group by an OMe group effectively reduces the hydrophilicity of the surfactant but does not change dramatically its phase behavior in water.

  • interfacial tension and behavior of nonionic surfactants

    Interfacial Tension and Behavior of Nonionic Surfactants

    Abstract Low interfacial tensions are possible with nonionic surfactants. The effects of several solution variables (e.g., salinity and alcohol) on low-tension behavior have been determined for some nonionic surfactants. Nonionics have been found to

  • the phase behavior and microstructure of efficient

    The Phase Behavior and Microstructure of Efficient

    PHASE BEHAVIOR Results CiEj/DDAB/water. The addition of small amounts of DDAB greatly influences the aqueous phase behavior of both C12E6 and C8E3 (Fig. 1). The lower consolute point that charac-FIG. 1. Pseudo-binary surfactant water phase diagrams of C12E6 and C8E3 with added DDAB. The phase Lfirepresent both single and multiphase lamellar

  • a nonionic polyethylene oxide (peo) surfactant model

    A Nonionic Polyethylene Oxide (PEO) Surfactant Model

    Polyethoxylated, nonionic surfactants are important constituents of many drug formulations, including lipid-based formulations. In an effort to better understand the behavior of formulation excipients at the molecular level, we have developed molecular dynamics (MD) models for the widely used surfactant Kolliphor EL (KOL), a triricinoleate ester of ethoxylated glycerol.

  • researchgate.net

    researchgate.net

    To my daughter, Raya. “ a scientist must also be absolutely like a child. If he sees a thing, he must say that he sees it, whether it was what he thought he was going to see

  • phase behavior of highly immiscible polymer blends

    Phase Behavior of Highly Immiscible Polymer Blends

    these nonionic surfactant molecules are comparable in magnitude.33-39 They are thus often referred to as balanced surfactants. Our objective is to study the phase behavior of mixtures of highly immiscible polymerss polyethylene (PE) and polyisobutylene (PIB)sin the presence of a balanced surfactant. The surfactant

  • correlation for phase behavior of nonionic surfactants

    Correlation for phase behavior of nonionic surfactants

    The present study details the behavior of such systems with nonionic surfactants, including the variables: temperature, alcohol type and concentrations, added electrolyte, ethylene oxide number of the surfactant, alkane molecular weight for the oil phase, and the hydrophobic molecular weight for the surfactant. 28 references.

  • clouding behavior of microemulsions of some nonionic

    CLOUDING BEHAVIOR OF MICROEMULSIONS OF SOME NONIONIC

    CLOUDING BEHAVIOR OF MICROEMULSIONS OF SOME NONIONIC SURFACTANTS 2010 PARTHA MUKHERJEE CENTRE OF STUDIES IN SURFACE SCIENCE AND TECHNOLOGY SCHOOL OF CHEMISTRY SAMBALPUR UNIVERSITY JYOTI VIHAR 768 019, INDIA . CLOUDING BEHAVIOR OF MICROEMULSIONS OF SOME NONIONIC SURFACTANTS Thesis Submitted to Sambalpur

  • diversifying the solid state and lyotropic phase behavior

    Diversifying the solid state and lyotropic phase behavior

    2007-09-13· The solid state and lyotropic phase behavior of 10 new nonionic urea-based surfactants has been characterized. The strong homo-urea interaction, which can prevent urea surfactants from forming lyotropic liquid crystalline phases, has been ameliorated through the use of isoprenoid hydrocarbon tails

  • monodisperse perfluoroalkyl oxyethylene nonionic

    Monodisperse Perfluoroalkyl Oxyethylene Nonionic

    The results of phase behavior in aqueous binary systems are discussed. As expected, the replacement of OH group by an OMe group effectively reduces the hydrophilicity of the surfactant but does not change dramatically its phase behavior in water.

  • effects of urea on the microstructure and phase behavior

    Effects of urea on the microstructure and phase behavior

    2010-09-29· Urea unfolding curves of membrane proteins are usually measured at a constant surfactant concentration 29, and such studies do not address the effect of urea on the surfactant phase behavior. When a concentration path in an unfolding experiment also crosses the CMC, or another condition where micellar structure changes, complications in

  • the phase behavior and microstructure of efficient

    The Phase Behavior and Microstructure of Efficient

    PHASE BEHAVIOR Results CiEj/DDAB/water. The addition of small amounts of DDAB greatly influences the aqueous phase behavior of both C12E6 and C8E3 (Fig. 1). The lower consolute point that charac-FIG. 1. Pseudo-binary surfactant water phase diagrams of C12E6 and C8E3 with added DDAB. The phase Lfirepresent both single and multiphase lamellar

  • alkyl polyglucoside microemulsion phase behavior

    Alkyl polyglucoside microemulsion phase behavior

    phase behavior observed in water–alkane–C i E j mixtures [9–14]. These mixtures provide an excel-lent basis for comparison with other water–oil– nonionic surfactant mixtures. The omnipresent characteristic of water– alkane–C i E j phase behavior is the change in the partitioning of the surfactant

  • interaction of hydrophobically modified polymers

    Interaction of hydrophobically modified polymers

    The phase behavior, membrane rigidity, compression modulus, and bilayer mean bending modulus are found to be independent of molecular weight, polydispersity, and hydrophobe length of hm-polymers. The rigidity and compression moduli of membranes increase with increasing polymer concentration and hydrophobe substitution level. A minimum hydrophobic interaction strength (combination of

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