1
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Phase separation phenomena and thermodynamics of octylphenol polyoxyethylene ether in micellar solutions: Effect of high concentration of inorganic salts and linear correlation. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.04.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2
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Illous E, Ontiveros JF, Lemahieu G, Lebeuf R, Aubry JM. Amphiphilicity and salt-tolerance of ethoxylated and propoxylated anionic surfactants. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124786] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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3
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Dilek Yıldız, Mustafa Demir. Flame Atomic Absorption Determination of Copper in Environmental Water with Cloud Point Extraction using Isonitrosoacetophenone 2-aminobenzoylhydrazone. JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1134/s1061934819050022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Thermodynamics and phase separation phenomenon of polyoxyethylene sorbitan monolaurate in micellar solutions containing inorganic salts. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2018.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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Liu X, Lu Y, Luo G. Continuous Flow Synthesis of Polystyrene Nanoparticles via Emulsion Polymerization Stabilized by a Mixed Nonionic and Anionic Emulsifier. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b02352] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaojing Liu
- State Key Laboratory of Chemical
Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Yangcheng Lu
- State Key Laboratory of Chemical
Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Guangsheng Luo
- State Key Laboratory of Chemical
Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
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6
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Temel NK, Gürkan R. Extraction, Preconcentration, and Quantification of Low Levels of Free Formaldehyde from Some Beverage Matrices by Combination of Ultrasound-Assisted-Cloud Point Extraction with Spectrophotometry. FOOD ANAL METHOD 2017. [DOI: 10.1007/s12161-017-0973-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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7
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Batıgöç Ç, Akbaş H. Thermodynamic parameters of clouding phenomenon in nonionic surfactants: The effect of the electrolytes. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.02.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Thakkar K, Bharatiya B, Ray D, Aswal VK, Bahadur P. Molecular interactions involving aqueous Triton X-100 micelles and anionic surfactants: Investigations on surface activity and morphological transitions. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.08.086] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Behr AM, Tucker CJ, Daugs ED. Performance of New Biodegradable Di-Sulfonate Surfactants as Hydrotropes in High-Temperature and Salinity Environments. J SURFACTANTS DETERG 2014. [DOI: 10.1007/s11743-014-1651-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Stability of oil-in-water macro-emulsion with anionic surfactant: Effect of electrolytes and temperature. Chem Eng Sci 2013. [DOI: 10.1016/j.ces.2013.07.050] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Duarte LJN, Canselier JP. Oxo-Alcohol Ethoxylates: Surface and Thermodynamic Properties and Effect of Various Additives on the Cloud Point. TENSIDE SURFACT DET 2013. [DOI: 10.3139/113.100272] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
In this study the thermodynamic properties of various Oxo-alcohol ethoxylates related to their adsorption at the air/water interface and to their micellization have been studied. The effect of various additives, including electrolytes, alcohols, polar aromatic solutes, and ionic and nonionic surfactants on the cloud point of aqueous solutions of the same surfactants has also been investigated. Salting-out electrolytes lower the cloud point while salting-in species raise it. Except for the totally water-miscible alcohols, most hydroxylated compounds lower the cloud point. Phenols, aromatic alcohols, and amines seem to interact preferentially with the ethylene oxide groups of the micelles, leading to strong dehydration, and consequently lowering the cloud point. On the contrary, by forming mixed micelles, an anionic surfactant strongly raises the cloud point of the nonionic.
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12
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Klaus A, Tiddy GJT, Rachel R, Trinh AP, Maurer E, Touraud D, Kunz W. Hydrotrope-induced inversion of salt effects on the cloud point of an extended surfactant. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:4403-11. [PMID: 21443178 DOI: 10.1021/la104744e] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We report on the effects of electrolytes spanning a range of anions (NaOc, NaSCN, NaNO(3), NaBr, NaCl, NaBu, NaOAc, Na(2)SO(4), Na(2)HPO(4), and Na(2)CO(3)) and cations (LiCl, NaCl, KCl, CsCl, and choline chloride) on the aqueous solubility of an extended surfactant. The surfactant is anionic with a long hydrophobic tail as well as a significant fraction of propylene oxide groups and ethylene oxide groups (C(12-14)-PO(16)-EO(2)-SO(4)Na, X-AES). In the absence of electrolytes, X-AES exhibits a cloud-point temperature that decreases with increasing surfactant concentration. After the addition of salts to the surfactant solutions, various shifts in the solubility curves are observed. These shifts follow precisely the same Hofmeister series that is found for salting-in and salting-out effects in protein solutions. In the presence of different concentrations of sodium xylene sulfonate (SXS), the solubility of the surfactant increases. In this context, SXS can be considered to be a salting-in salt. However, when the electrolytes are added to an aqueous solution of X-AES and SXS the Hofmeister series reverses for divalent anions such as Na(2)SO(4), Na(2)HPO(4), and Na(2)CO(3). Studies on the phase behavior and micelle structures using polarization microscopy, freeze-etch TEM, and NMR measurements indicate a dramatic change in the coexisting phases on the addition of SXS.
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Affiliation(s)
- Angelika Klaus
- Institute of Physical and Theoretical Chemistry, Faculty of Natural Sciences III, University of Regensburg, D-93040 Regensburg, Germany
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13
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Effect of temperature on pseudoternary system Tween-80–butanol–hexane–water. J Colloid Interface Sci 2011; 355:157-63. [DOI: 10.1016/j.jcis.2010.12.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Revised: 12/08/2010] [Accepted: 12/09/2010] [Indexed: 11/19/2022]
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14
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Mei Z, Xu J, Sun D. O/W nano-emulsions with tunable PIT induced by inorganic salts. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2010.11.069] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Mata JP, Majhi PR, Yamashita M, Khanal A, Nakashima K, Bahadur P. Aggregation Behavior of Pluronic-L64 in Presence of Sodium Dodecyl Sulphate in Water. J DISPER SCI TECHNOL 2010. [DOI: 10.1080/01932690701857152] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- J. P. Mata
- a Research School of Chemistry, Australian National University , Canberra , Australia
| | - P. R. Majhi
- b Department of Pharmaceutical Chemistry , School of Pharmacy, University of California , San Francisco , California , USA
| | - M. Yamashita
- c Department of Chemistry , Faculty of Science and Engineering, Saga University , Saga , Japan
| | - A. Khanal
- c Department of Chemistry , Faculty of Science and Engineering, Saga University , Saga , Japan
| | - K. Nakashima
- c Department of Chemistry , Faculty of Science and Engineering, Saga University , Saga , Japan
| | - P. Bahadur
- d Department of Chemistry , V. N. S. G. University , Surat , India
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16
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Patel T, Bahadur P, Mata J. The clouding behaviour of PEO–PPO based triblock copolymers in aqueous ionic surfactant solutions: A new approach for cloud point measurements. J Colloid Interface Sci 2010; 345:346-50. [DOI: 10.1016/j.jcis.2010.01.079] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2009] [Revised: 01/25/2010] [Accepted: 01/27/2010] [Indexed: 10/19/2022]
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17
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Nandni D, Vohra KK, Mahajan RK. Study of micellar and phase separation behavior of mixed systems of triblock polymers. J Colloid Interface Sci 2009; 338:420-7. [DOI: 10.1016/j.jcis.2009.06.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2009] [Revised: 06/15/2009] [Accepted: 06/16/2009] [Indexed: 11/30/2022]
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18
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Yao HL, Shi YC, Yuan SL, Li GZ. Quantitative Structure-Property Relationship on Prediction of Cloud Point of Surfactants. J DISPER SCI TECHNOL 2009. [DOI: 10.1080/01932690802598531] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Kobayashi H, Chaiyasat A, Oshima Y, Suzuki T, Okubo M. Incorporation of nonionic emulsifier inside carboxylated polymer particles during emulsion copolymerization: influence of methacrylic acid content. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:101-106. [PMID: 19053645 DOI: 10.1021/la8021003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The influence of the methacrylic acid (MAA) content (0-10 mol %) on the incorporation of polyoxyethylene nonylphenyl ether (Emulgen 911, HLB 13.7) nonionic emulsifier inside polymer particles during emulsion copolymerization of styrene (S) and MAA was investigated. The amount of incorporated emulsifier after centrifugal washing with 2-propanol to remove adsorbed emulsifier from the surfaces was directly measured by gel permeation chromatography (GPC) and (1)H NMR. The level of incorporation increased with increasing MAA content and reached 74% of the total amount of emulsifier at 10 mol % MAA. At lower MAA contents (0-3 mol %), the particle size distribution was bimodal because of formation of new particles by secondary nucleation. However, only limited secondary nucleation occurred at higher MAA contents (6-10 mol %), and monodisperse particles were thus obtained.
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Affiliation(s)
- Hiroshi Kobayashi
- Graduate School of Engineering, Kobe University, Kobe 657-8501, Japan
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20
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Ahmed Muhe M, . RJ. Effect of Electrolyte on Synergism of Anionic-Nonionic Surfactant Mixture. ACTA ACUST UNITED AC 2007. [DOI: 10.3923/jas.2007.1362.1371] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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21
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Anton N, Saulnier P, Béduneau A, Benoit JP. Salting-Out Effect Induced by Temperature Cycling on a Water/Nonionic Surfactant/Oil System. J Phys Chem B 2007; 111:3651-7. [PMID: 17388519 DOI: 10.1021/jp0664768] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This paper presents original effects induced by temperature cycling on the transitional phase inversion of emulsions, stabilized by a nonionic polyethoxylated C18E6 surfactant model. The phase inversion follow-up is performed by electrical conductivity measurements, which involves focusing the study on the shape and location of the emulsion inversion region. In that way, new observations are brought out as a gradual evolution of the emulsion inversion along the cycling process. Two alternative approaches are considered for tackling these results: (i) first, a molecular approach regarding the particular organization and rearrangement of water clusters surrounding the surfactant polymer polar head, and (ii) second, a thermodynamic approach only considering the whole Gibbs free energy of the system. The volumic approaches are transposed, here, to the water/oil interface, and disclose that the phase inversion zone is included in a metastable region, able to stabilize for a given temperature, either metastable O/W emulsions or stable W/O ones. In that way, this study proposes novel and complementary insights into the phenomena governing the emulsion phase inversion.
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Affiliation(s)
- Nicolas Anton
- Inserm U646, Ingénierie de la vectorisation particulaire, Université d'Angers, F-49100 Angers, France
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22
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Nakashima K, Bahadur P. Aggregation of water-soluble block copolymers in aqueous solutions: recent trends. Adv Colloid Interface Sci 2006; 123-126:75-96. [PMID: 16860770 DOI: 10.1016/j.cis.2006.05.016] [Citation(s) in RCA: 197] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
This review summarizes recent literature and some of our own results on aggregation behavior on water-soluble block copolymers belonging to three different classes viz. hydrophilic-hydrophobic (AB, ABA and BAB) block copolymers, double hydrophilic block copolymers (DHBCs) and ABC triblock copolymers. In the case of amphiphilic copolymers, special attention has been focussed on aggregation of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymers (Pluronics) and their aggregation in aqueous solutions at different temperatures as well as in the presence of various additives. Recent studies based on modern techniques viz. scattering (static and dynamic light scattering and small angle neutron scattering), spectral methods, e.g., fluorescence (static and time resolved), nuclear magnetic resonance and Fourier transform infrared spectroscopies, thermal methods e.g., differential scanning calorimetry and isothermal titration calorimetry, cryotransmission electron microscopy, ultrasonic absorption along with general physical properties like surface tension, viscosity and dye solubilization are summarized. For the DHBCs where one of the blocks is usually a polyion, complex formation by adding oppositely charged ions induces the formation of nanoaggregates. Characterization of such nanoaggregates of polyion complexes of DHBCs and their potential use for incorporation of ionic solutes in the micellar core are reviewed. The formation and characteristics of core-shell-corona micelles of ABC triblock copolymers and their applications as vehicles for controlled drug release are also discussed.
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Affiliation(s)
- Kenichi Nakashima
- Department of Chemistry, Faculty of Science and Engineering, Saga University, 1 Honjo-machi, Saga 840-8502, Japan
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23
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Garrett P, Wicks S, Fowles E. The effect of high volume fractions of latex particles on foaming and antifoam action in surfactant solutions. Colloids Surf A Physicochem Eng Asp 2006. [DOI: 10.1016/j.colsurfa.2006.01.054] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Mata J. Hydrodynamic and Clouding Behavior of Triton X‐100+SDS Mixed Micellar Systems in the Presence of Sodium Chloride. J DISPER SCI TECHNOL 2006. [DOI: 10.1081/dis-200066708] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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25
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Joshi V, Varade D, Parikh J. Clouding Behavior of Ethylene Oxide‐Propylene Oxide Block Copolymer P85: The Effect of Additives. J DISPER SCI TECHNOL 2006. [DOI: 10.1080/01932690500267280] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Estimation of degree of counterion binding and related parameters of monomeric and dimeric cationic surfactants from cloud point measurements by using triblock polymer as probe. Colloid Polym Sci 2006. [DOI: 10.1007/s00396-005-1457-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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27
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Bakshi MS, Singh J, Kaur J. Estimation of degree of counterion binding and thermodynamic parameters of ionic surfactants from cloud point measurements by using triblock polymer as probe. J Colloid Interface Sci 2005; 287:704-11. [PMID: 15925640 DOI: 10.1016/j.jcis.2005.02.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2004] [Revised: 12/17/2004] [Accepted: 02/15/2005] [Indexed: 10/25/2022]
Abstract
Cloud point (C(P)) was measured for ternary mixtures of different ionic surfactants such as sodium dodecyl sulfate (SDS), dodecyltrimethylammonium bromide (DTAB), and dimethylene bis(dodecyldimethylammonium bromide) (12-2-12) plus triblock polymer (TBP) ((PEO)(2)(PPO)(15.5)(PEO)(2)) plus water, keeping the concentration of TBP constant and varying the surfactant concentration from pre- to postmicellar regions. These experiments were also performed in the presence of different fixed amounts of NaBr to evaluate the salt effect on the clouding behavior of these ternary mixtures. The C(P) value of TBP exhibits a drastic change at the cmc of each surfactant. The cmc values thus obtained both in the absence and in the presence of NaBr were used to evaluate counterion binding (beta) with the Corrin-Harkins method. beta values were also used to evaluate the thermodynamic parameters of these ionic surfactants. The results suggest that the beta values evaluated using this method, especially at low [TBP], are in good agreement with those reported in the literature.
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Affiliation(s)
- Mandeep Singh Bakshi
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
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28
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Coulombeau H, Testard F, Zemb T, Larpent C. Effect of recognized and unrecognized salt on the self-assembly of new thermosensitive metal-chelating surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:4840-50. [PMID: 15984240 DOI: 10.1021/la049832r] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
New functional thermoreversible metal complexing surfactants consisting of a chelating amino acid residue grafted to the tip of a nonionic surfactant [alkyl poly(oxyethylene) CiEj] or in a branched position are studied. Nonionic surfactants are thermoreversible and exhibit a clouding phenomenon associated with phase separation of micelles. The functional molecules retain both the surface-active properties and the characteristic thermoreversible behavior. Because of the hydrophilic contribution of the chelating group (acetyl lysine), the cloud point and the area at the air-water interface are higher for functional surfactants than for nonionic precursors. These new surfactants have efficient complexing properties toward metal ions and are more efficient than the mixture of the corresponding nonionic surfactant and the acetyl lysine ligand solubilized in micelles. This reveals the synergistic effect obtained by the covalent link between the two functions. Addition of a bulky group on classical amphiphilic structures modifies markedly the packing constraints at the origin ofmicellar structures. Small-angle X-ray or neutron scattering results, modeled jointly on the absolute scale, demonstrate the influence of unrecognized lithium nitrate (LiNO3) as well as specifically recognized uranyl nitrate [UO2(NO3)2] salts on micellar structure and phase boundaries. The determination of the micellar shape variations induced by a recognized salt, that is, a decrease of the polar headgroup, allows the rationalization of uncommon synergistic effects on the cloud point variation: increase with lithium nitrate, no decrease in the presence of uranyl nitrate, and a very large decrease when these two salts are present together.
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Affiliation(s)
- Hélène Coulombeau
- CEA-Saclay, DSM/DRECAM/SCM/Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire, Gif/Yvette 91 191, France
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29
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Li JL, Chen BH. Equilibrium partition of polycyclic aromatic hydrocarbons in a cloud-point extraction process. J Colloid Interface Sci 2003; 263:625-32. [PMID: 12909056 DOI: 10.1016/s0021-9797(03)00403-x] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
A cloud-point extraction (CPE) process using the nonionic surfactant Tergitol 15-S-7, a secondary ethoxylated alcohol, to extract selected polycyclic aromatic hydrocarbons (PAHs) from aqueous solutions is investigated. The CPE process is facilitated at the ambient temperature, ca. 22 degrees C, by the reduction of the cloud-point temperature of the surfactant solution by addition of sodium sulfate. It is observed that the preconcentration factor could be enhanced either by increasing the salt concentration or by decreasing the initial surfactant concentration in the micellar solution. A high preconcentration factor of about 40 was achieved at 1 wt% surfactant concentration with the addition of 0.6 M Na(2)SO(4). It is also noted that the equilibrium partition coefficients of the model PAHs are nearly independent of surfactant concentrations, up to 3 wt%, in this study. Correlations between the equilibrium partition coefficients K(p) of the PAHs and their octanol-water partition coefficients K(ow), as well as K(p) and the molar volume V(x) of these PAHs, indicate that the partition processes of the PAHs in the CPE processes are mainly governed by their hydrophobic affinities to the surfactant aggregates. Furthermore, the effect of added Na(2)SO(4) on the equilibrium partition coefficients is also studied. It is shown that addition of more Na(2)SO(4) to the surfactant solution gives more partition of the PAHs into the surfactant-rich phase.
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Affiliation(s)
- Jing-Liang Li
- Department of Chemical and Environmental Engineering, National University of Singapore, 10 Kent Ridge Crescent, 119260, Singapore.
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30
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Effect of different additives on the cloud point of a polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer in aqueous solution. J SURFACTANTS DETERG 2002. [DOI: 10.1007/s11743-002-0226-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Phase behavior and detergency study of lauryl alcohol ethoxylates with high ethylene oxide content. J SURFACTANTS DETERG 2000. [DOI: 10.1007/s11743-000-0129-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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32
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Quina FH, Hinze WL. Surfactant-Mediated Cloud Point Extractions: An Environmentally Benign Alternative Separation Approach. Ind Eng Chem Res 1999. [DOI: 10.1021/ie980389n] [Citation(s) in RCA: 333] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Frank H. Quina
- Department of Chemistry, Wake Forest University, P.O. Box 7486, Winston-Salem, North Carolina 27109
| | - Willie L. Hinze
- Department of Chemistry, Wake Forest University, P.O. Box 7486, Winston-Salem, North Carolina 27109
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