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Journal articles on the topic 'Mixed surfactant'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 May 2024

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1

Liu, Jianfei, and Weihong Chen. "Remediation of phenanthrene contaminated soils by nonionic–anionic surfactant washing coupled with activated carbon adsorption." Water Science and Technology 72, no. 9 (2015): 1552–60. http://dx.doi.org/10.2166/wst.2015.357.

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Batch experiments were conducted to investigate the performance of nonionic–anionic mixed surfactants and their recovery through activated carbon. The solubilization capabilities of mixed surfactants toward phenanthrene (PHE) were reduced by addition of anionic surfactant to the mixed systems. Results showed that sorption of Triton X-100 (TX100) onto soil decreased with increasing mass fraction of sodium dodecyl sulfate (SDS) in the mixed surfactant solutions. Soil contaminated with PHE at 200 mg/kg was washed with different surfactant concentrations at various mass ratios of nonionic–anionic

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2

Desai, Tejas R., and Sharad G. Dixit. "Adsorption from Mixtures of Cationic/Non-Ionic Surfactants on to a Polystyrene Surface." Adsorption Science & Technology 15, no. 5 (1997): 391–405. http://dx.doi.org/10.1177/026361749701500507.

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The adsorption of cetyltrimethylammonium bromide (CTAB) and nonyl phenyl ethoxylates (NP-n, where n = 13, 20 and 30) on to polystyrene powder has been studied. Concentrations of surfactant solutions ranging from below CMC to well above CMC were investigated. In a single surfactant system, only the cationic surfactant (CTAB) was found to adsorb appreciably while nonionic surfactants showed negligible adsorption. In mixed surfactant systems, the cationic surfactant was found to induce significant co-adsorption of non-ionic surfactants. The increased adsorption of non-ionic surfactants has been a

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3

Hassan, Mohammed, Sadeq M. Al-Hazmi, Ibrahim A. Alhagri, et al. "Micellar Catalysis of Chemical Reactions by Mixed Surfactant Systems and Gemini Surfactants." Asian Journal of Chemistry 33, no. 7 (2021): 1471–80. http://dx.doi.org/10.14233/ajchem.2021.23187.

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Micellar catalysis exhibited by mixed surfactant systems and gemini surfactants was reviewed. The review focused on mixed surfactant systems and tried to correlate the changes in the physico-chemical properties of these systems to the variations of their catalytic activities. Mixed surfactant systems are promising as the catalytic efficiency of some single surfactants was significantly enhanced in the presence of other critically selected surfactants. The selection should consider the charge, size, and structures of the head group as well as an appropriate length of hydrocarbon tail. The overa

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4

Petrovic, Lidija, Verica Sovilj, Jadranka Milanovic, and Jaroslav Katona. "A conductometric investigation of hydroxypropylmethyl cellulose/sodium dodecyl sulfate/nonionic surfactant systems." Journal of the Serbian Chemical Society 79, no. 11 (2014): 1421–32. http://dx.doi.org/10.2298/jsc140321059p.

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Surfactant mixtures are very often used in various cosmetic and pharmaceutical products because they commonly act in synergism and provide more favorable properties than the single surfactants. At the same time, the 9 presence of polymers in mixtures of surfactants may lead to molecular interactions thereby affecting product stability and activity. For these reasons it is very important to determine the surfactant interactions influence on 1micellization and mixed micellization, as well as polymer-surfactants mixed micelles interactions. In this work we examined self-aggregation of nonionic su

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Pilipović, Ana, Ivana Vapa, Vesna Tepavčević, Gorana Puača, and Mihalj Poša. "Ternary Mixed Micelle Hexadecyltrimethylammonium Bromide—Dodecyltrimethylammonium Bromide—Sodium Deoxycholate: Gibbs Free Energy of Mixing and Excess Gibbs Energy of Mixing." Molecules 28, no. 18 (2023): 6722. http://dx.doi.org/10.3390/molecules28186722.

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Pharmaceutical, food, and cosmetic formulations often contain binary or ternary surfactant mixtures with synergistic interactions amongst micellar building blocks. Here, a ternary mixture of the surfactants hexadecyltrimethylammonium bromide, dodecyltrimethylammonium bromide, and sodium deoxycholate is examined to see if the molar fractions of the surfactants in the ternary mixed micellar pseudophase are determined by the interaction coefficients between various pairs of the surfactants or by their propensity to self-associate. Critical micelle concentrations (CMC) of the analyzed ternary mixt

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6

Siti Noraini Bunawan, Noor Azlina Masdor, Nur Adeela Yasid, Mohd Izuan Effendi Halmi, and Mohd Yunus Abd Shukor. "Effect of Different Hydrophilic-lipophilic Balance (HLB) on Droplet Size, Polydispersity Index and Stability of Lemon Myrtle Nanoemulsion." International Journal of Nanoelectronics and Materials (IJNeaM) 16, DECEMBER (2023): 431–40. http://dx.doi.org/10.58915/ijneam.v16idecember.423.

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Using mixed non-ionic surfactants Tween/Span, we determined the required hydrophilic-lipophilic balance (HLB) value on the oil in water nanoemulsion of lemon myrtle essential oil. In this study, Span 80 mixed with Tween 80, and Span 20 mixed with Tween 20 were used as mixed non-ionic surfactant. The droplet size, polydispersity index and stability of the lemon myrtle nanoemulsion at different HLB values were obtained over a period of 28 days. Both mixed surfactants have similar required HLB value at HLB 14 due to their smallest droplet size and lowest polydispersity index during the early nano

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7

Jiang, Lu Ming, Qing Zhe Jiang, Zhao Zheng Song, and Xiao Xiao. "Mixture of Different Surfactants Enhanced Chemical Flooding for Suijing Oil Recovery." Advanced Materials Research 1004-1005 (August 2014): 688–91. http://dx.doi.org/10.4028/www.scientific.net/amr.1004-1005.688.

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We investigate six different surfactants in interfacial tension (IFT) between the surfactant solution and the crude oil from Suijng oilfield. Based on the measurement of interfacial tension, the anion surfactant Heavy alkylbenzene sulfonate (HABS) and non-ionic surfactant alkyl glycoside (APG) are selected for the formulation of mixed surfactant. The IFT between the mixed surfactant solution comprising the HABS and APG and crude oil from Suijing can be reduced to ultralow.The experimental results indicate that the selected mixed surfactant formulation (0.20%HABS+0.10%APG) has a good performanc

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8

Liu, Jianfei, Yuru Wang, and Huifang Li. "Synergistic Solubilization of Phenanthrene by Mixed Micelles Composed of Biosurfactants and a Conventional Non-Ionic Surfactant." Molecules 25, no. 18 (2020): 4327. http://dx.doi.org/10.3390/molecules25184327.

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This study investigated the solubilization capabilities of rhamnolipids biosurfactant and synthetic surfactant mixtures for the application of a mixed surfactant in surfactant-enhanced remediation. The mass ratios between Triton X-100 and rhamnolipids were set at 1:0, 9:1, 3:1, 1:1, 1:3, and 0:1. The ideal critical micelle concentration values of the Triton X-100/rhamnolipids mixture system were higher than that of the theoretical predicted value suggesting the existence of interactions between the two surfactants. Solubilization capabilities were quantified in term of weight solubilization ra

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9

Datir, Kirti, Harshada Shinde, and Amit P. Pratap. "Preparation of a Gemini Surfactant from Mixed Fatty Acid and its Use in Cosmetics." Tenside Surfactants Detergents 58, no. 1 (2021): 67–73. http://dx.doi.org/10.1515/tsd-2020-2278.

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Abstract Among the surfactants, dimeric surfactants represent a niche group with multifunctional properties. In this work a modified gemini surfactant was synthesized using symmetrical fatty acids. Due to the spacers used to combine the two symmetrical monomers, the synthesized gemini surfactant is cationic. The structure of the compound was confirmed with 1H-NMR. The most advantageous property of the gemini surfactant is that it has a lower surface tension, i. e. less than 35 mNm–1 at 25°C, compared to monomeric surfactants. The surface tension was determined with a Kyowa tensiometer. The CMC

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10

Alves, Luís, Solange Magalhães, Cátia Esteves, Marco Sebastião, and Filipe Antunes. "Synergisms between Surfactants, Polymers, and Alcohols to Improve the Foamability of Mixed Systems." J 7, no. 2 (2024): 169–82. http://dx.doi.org/10.3390/j7020010.

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In order to produce detergents with improved performance and good market acceptability, it is crucial to develop formulations with improved foamability and cleaning performance. The use of a delicate balance of surfactants and additives is an appealing strategy to obtain good results and enables a reduction in the amount of chemicals used in formulations. Mixtures of hydrophobically modified linear polymers and surfactants, as well as balanced mixtures with co-surfactants and/or hydrotropes, are the most effective parameters to control foamability and foam stability. In the present study, the

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11

Mucic, Nenad, Jelena Skrbic, Sandra Bucko, et al. "Adsorption of Equimolar Mixtures of Cationic and Anionic Surfactants at the Water/Hexane Interface." Colloids and Interfaces 5, no. 1 (2020): 1. http://dx.doi.org/10.3390/colloids5010001.

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In mixed solutions of anionic and cationic surfactants, called catanionics, ion pairs are formed which behave like non-ionic surfactants with a much higher surface activity than the single components. In equimolar mixtures of NaCnSO4 and CmTAB, all surface-active ions are paired. For mixtures with n + m = const, the interfacial properties are rather similar. Catanionics containing one long-chain surfactant and one surfactant with medium chain length exhibit a strong increase in surface activity as compared with the single compounds. In contrast, catanionics of one medium- and one short chain s

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12

Abdel-Rahem, Rami A., Sana Niaz, Abdelmnim M. Altwaiq, Muayad Esaifan, Mohammad Bassam Al Bitar, and Abeer Al Bawab. "Synergistic interaction between sodium dodecyl benzene sulfonate (SDBS) and N,N-dimethyldodecan-1-amine oxide (DDAO) and their adsorption onto activated charcoal and Jordanian natural clay." Tenside Surfactants Detergents 59, no. 2 (2022): 144–58. http://dx.doi.org/10.1515/tsd-2021-2395.

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Abstract Solutions of sodium dodecyl benzene sulfonate (SDBS) and N,N-dimethyldodecan-1-amine oxide (DDAO) with mole fractions of 0.00, 0.25, 0.50, 0.75 and 1.00 were prepared and their surface tension was measured as a function of total surfactant concentration. The critical micelle concentration (CMC) values of these mixed solutions were also determined. The minimum area occupied by a surfactant molecule at air/water interface was calculated for single and binary surfactant mixtures. A pronounced synergistic interaction between SDBS and DDAO was detected. The surface tension and CMC-values o

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13

Kochkodan, Olga, and Viktor Maksin. "Mixed adsorption of hexadecylpyridinium bromide and Triton X surfactants at graphitized carbon black." Journal of the Serbian Chemical Society 85, no. 6 (2020): 781–94. http://dx.doi.org/10.2298/jsc190416112k.

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Adsorption of cationic 1-hexadecylpyridinium bromide (HDPB) and non-ionic p-(1,1,3,3-tetramethylbutyl)-phenoxypolyoxyethylene glycols surfactants of the Triton X series (Triton X-45, Triton X-100 and Triton X-305) from their single and mixed aqueous solutions at thermally graphitized carbon black (CB) was studied. It was shown that the adsorption of the non-ionic surfactant from its individual solution decreased when a number of ethylene oxide units in the surfactant molecule increased. Addition of the non-ionic surfactants increased the amount of HDPB adsorbed from HDPB/Triton X mixtures. At

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14

Kaewpukpa, R., Sumaeth Chavadej, and J. F. Scamehorn. "Oily Soil Detergency under Microemulsion Conditions: Effects of Oil Loading and Surfactant Adsorption." Advanced Materials Research 55-57 (August 2008): 929–32. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.929.

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Detergency process of oily soil removal from fabrics is of interest and the mechanisms of oily soil removal are very complicated involving several factors: interfacial tension, oil loading and surfactant adsorption. In this study, the effects of oil loading and the surfactant adsorption on the detergency performance of oily soil removal were investigated. Mixed surfactant systems of branched alcohol propoxylate sulfate sodium salt (Alfoterra 145-3PO), an extended anionic surfactant, and secondary alcohol ethoxylate (Tergitol 15-S-5), a nonionic surfactant, were used to form microemulsions with

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15

Zhang, Qian, Huirong Chi, Mingzhi Tang, et al. "Mixed surfactant modified graphene oxide nanocarriers for DOX delivery to cisplatin-resistant human ovarian carcinoma cells." RSC Advances 6, no. 90 (2016): 87258–69. http://dx.doi.org/10.1039/c6ra17609g.

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16

Kochkodan, Olga, Victor Maksin, and Tetyana Semenenko. "Adsorption of Sodium Hexadecyl Sulfate and Triton X from Binary Aqueous Solutions at Thermally Graphitized Carbon Black." Periodica Polytechnica Chemical Engineering 65, no. 1 (2020): 72–79. http://dx.doi.org/10.3311/ppch.15085.

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Adsorption of anionic sodium hexadecyl sulfate (SHS) and nonionic Triton X surfactants with different ethoxylation degree: TX-45, TX-100 and TX-300 from their individual and mixed aqueous solutions at the surface of thermally graphitized carbon black (CB) was studied. It was found that at low solution concentrations addition of the nonionic surfactant increases the amount of SHS adsorbed from SHS/Triton X mixtures compared to SHS amount adsorbed from its individual solution. These findings might be explained by decreasing in electrostatic repulsion between SHS ions due to inclusion of the mole

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17

Prisle, N. L., T. Raatikainen, A. Laaksonen, and M. Bilde. "Surfactants in cloud droplet activation: mixed organic-inorganic particles." Atmospheric Chemistry and Physics 10, no. 12 (2010): 5663–83. http://dx.doi.org/10.5194/acp-10-5663-2010.

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Abstract. Organic compounds with surfactant properties are commonly found in atmospheric aerosol particles. Surface activity can significantly influence the cloud droplet forming ability of these particles. We have studied the cloud droplet formation by two-component particles comprising one of the organic surfactants sodium octanoate, sodium decanoate, sodium dodecanoate, and sodium dodecyl sulfate, mixed with sodium chloride. Critical supersaturations were measured with a static diffusion cloud condensation nucleus counter (Wyoming CCNC-100B). Results were modeled from Köhler theory applying

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18

Journal, Baghdad Science. "Synergistic Interaction in the adsorbed mixed surfactants film of Sodium Dodecyl Sulfate and Cocamidopropyl Betaine on Liquid – Air Interfacial." Baghdad Science Journal 13, no. 2 (2016): 1–9. http://dx.doi.org/10.21123/bsj.13.2.1-9.

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In the present work, the critical micelle concentration (CMC) of the solution of Sodium dodecyl sulfate (SDS) as anionic surfactant, Cocamidopropyl Betaine (CAPB) as amphoteric surfactant, and their mixture have been determined using surface tension and conductivity measurements at a temperature range 293 -323 K. The adsorption and thermodynamic micellization parameters (?G?m, ?G?ads, ?max ,Amin,?cmc ) for individual surfactants was calculated. Rosen model which is focuses on the adsorbed mixed surfactant film at the air/solution interface was used to calculate the interaction parameter ( ?? )

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19

Ezhilrani, V. C., Vigneshwari R, and Sasmita Dash. "Comparison Between Interaction of Hydrophobic-anionic and Hydrophobic-cationic Mixed Micellar System with Drug Ciprofloxacin." Oriental Journal Of Chemistry 37, no. 6 (2021): 1376–86. http://dx.doi.org/10.13005/ojc/370616.

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The interaction studies of drug ciprofloxacin with two mixed micellar systems are reported. The mixed micelles comprise a nonionic hydrophobic surfactant, pluronic L-81, an anionic surfactant, Ammonium dodecyl sulfate (ADS); and a cationic surfactant, Cetylpyridinium bromide (CPB). The various combinations chosen were L-81-ADS and L-81-CPB. The properties of both the mixed micelles were compared. Spectrophotometric, conductometric, co-solvent effect, and Infrared studies were used for the investigations. The studies were carried out in a wide range of mixed micellar concentrations in the post

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20

Azum, Naved, Malik Abdul Rub, Anish Khan, Maha M. Alotaibi, Abdullah M. Asiri, and Mohammed M. Rahman. "Mixed Micellization, Thermodynamic and Adsorption Behavior of Tetracaine Hydrochloride in the Presence of Cationic Gemini/Conventional Surfactants." Gels 8, no. 2 (2022): 128. http://dx.doi.org/10.3390/gels8020128.

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In this approach, tensiometry and UV-visible techniques are used to determine the effect of cationic gemini and conventional surfactants on tetracaine hydrochloride (TCH), an anesthetic drug. We have estimated micellar, interfacial, and energetic constraints. To gain a deep understanding of their mixed association behavior, the outputs were examined using different theoretical models. The critical micelle concentration for single and mixed amphiphiles was estimated. The cmc values of mixed amphiphiles were found between the individual amphiphiles due to strong attractive interaction (synergism

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Connolly, Terrence J., and Vincent C. Reinsborough. "Micellar rate enhancement studies in mixed sodium fluorocarbon/hydrocarbon surfactant solutions." Canadian Journal of Chemistry 70, no. 6 (1992): 1581–85. http://dx.doi.org/10.1139/v92-194.

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Stopped-flow kinetic studies were conducted in mixed micellar solutions of fluorocarbon and hydrocarbon anionic surfactants to determine the prevalent micellar form. The probe reaction was the Niaq2+/pyridine-2-azo-p-dimethylaniline (PADA) complexation, which is many times accelerated in the presence of anionic micelles. Binding constants for Niaq2+ and PADA partitioning between bulk solution and micelles were determined through the murexide technique and solubility measurements respectively and the molar reaction volume was obtained from the Robinson equation. The three binary surfactant syst

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22

Van Hamme, J. D., and O. P. Ward. "Influence of chemical surfactants on the biodegradation of crude oil by a mixed bacterial culture." Canadian Journal of Microbiology 45, no. 2 (1999): 130–37. http://dx.doi.org/10.1139/w98-209.

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The effects of surfactant physicochemical properties, such as the hydrophile-lipophile balance (HLB) and molecular structure, on the biodegradation of 2% w/v Bow River crude oil by a mixed-bacterial culture were examined. Viable counts increased 4.6-fold and total petroleum hydrocarbon (TPH) biodegradation increased 57% in the presence of Igepal CO-630, a nonylphenol ethoxylate (HLB 13, 0.625 g/L). Only the nonylphenol ethoxylate with an HLB value of 13 substantially enhanced biodegradation. The surfactants from other chemical classes with HLB values of 13 (0.625 g/L) had no effect or were inh

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23

Prisle, N. L., T. Raatikainen, A. Laaksonen, and M. Bilde. "Surfactants in cloud droplet activation: mixed organic-inorganic particles." Atmospheric Chemistry and Physics Discussions 9, no. 6 (2009): 24669–715. http://dx.doi.org/10.5194/acpd-9-24669-2009.

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Abstract. Organic compounds with surfactant properties are commonly found in atmospheric aerosol particles. Surface activity can significantly influence the cloud droplet forming ability of these particles. We have studied the cloud droplet formation by two-component particles comprising one of the organic surfactants sodium octanoate, sodium decanoate, sodium dodecanoate, and sodium dodecyl sulfate, mixed with sodium chloride. Critical supersaturations were measured with a static diffusion cloud condensation nucleus counter (Wyoming CCNC-100B). Results were modeled from Köhler theory applying

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Varade, Dharmesh, Hemant Ankleshwaria, and Pratap Bahadur. "Mixed Surfactant Systems." Tenside Surfactants Detergents 40, no. 5 (2003): 298–302. http://dx.doi.org/10.1515/tsd-2003-400511.

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Varade, D., S. Mody, H. Ankleshwaria, and P. Bahadur. "Mixed Surfactant Systems." Tenside Surfactants Detergents 40, no. 1 (2003): 46–51. http://dx.doi.org/10.1515/tsd-2003-400111.

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Rosen, Milton J., and Qiong Zhou. "Surfactant−Surfactant Interactions in Mixed Monolayer and Mixed Micelle Formation." Langmuir 17, no. 12 (2001): 3532–37. http://dx.doi.org/10.1021/la001197b.

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27

Huang, Xiangrong, Zhicheng Ye, Yazhuo Shang, et al. "Effect of Single/Mixed Surfactant Systems on Orientations of Liquid Crystals and Interaction of Proteins with Surfactants at Fluid Interfaces." Australian Journal of Chemistry 74, no. 8 (2021): 591. http://dx.doi.org/10.1071/ch21063.

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A series of single surfactant systems, i.e, quaternary ammonium-based gemini surfactants with different spacers and alkyl chain lengths (m-n-m; m=12, n=2, 3, 4, 6; n=3, m=12, 14, 16), halogen-free surface-active ionic liquid (HF-SAILs) with different symmetries ([Cnmim][C12H25SO4]; n=6, 8, 10, 12), and single-chain cationic surfactants including 1-dodecyl-3-methylimidazolium bromide ([C12mim]Br) and dodecyltrimethylammonium bromide (DTAB), along with certain combinations of different surfactants (12-3-12/[C12mim]Br and 12-3-12/DTAB) were applied to an aqueous/liquid crystal interface (ALI). Al

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Liu, Z. Q., and J. A. Zabkiewicz. "Influence of surfactant mixtures on cuticular uptake of glyphosate into grasses." Proceedings of the New Zealand Plant Protection Conference 52 (August 1, 1999): 228–33. http://dx.doi.org/10.30843/nzpp.1999.52.11606.

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The uptake of glyphosate into wheat and two grass species in the presence of surfactants varied with surfactant structure, ethylene oxide (EO) content and concentration. A synergistic uptake enhancement into wheat and barnyard grass was observed when an aliphatic amine surfactant was mixed with either an alcohol or octylphenol nonionic surfactant with different EO content, at equivalent concentration. The effect of an amine+alcohol surfactant mixture on glyphosate uptake into wheat and ryegrass was compared with commercial glyphosate formulations.

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Sharma, Gaurav, and Kishore K. Mohanty. "Wettability Alteration in High-Temperature and High-Salinity Carbonate Reservoirs." SPE Journal 18, no. 04 (2013): 646–55. http://dx.doi.org/10.2118/147306-pa.

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Summary The goal of this work was to change the wettability of a carbonate rock from mixed-wet toward water-wet at high temperature and high salinity. Three types of surfactants in dilute concentrations (&lt;0.2 wt%) were used. Initial surfactant screening was performed on the basis of aqueous stability at these harsh conditions. Contact-angle experiments on aged calcite plates were conducted to narrow the list of surfactants, and spontaneous-imbibition experiments were conducted on field cores for promising surfactants. Secondary waterflooding was carried out in cores with and without the

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Ludwig, Michael, Ramsia Geisler, Sylvain Prévost, and Regine von Klitzing. "Shape and Structure Formation of Mixed Nonionic–Anionic Surfactant Micelles." Molecules 26, no. 14 (2021): 4136. http://dx.doi.org/10.3390/molecules26144136.

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Aqueous solutions of a nonionic surfactant (either Tween20 or BrijL23) and an anionic surfactant (sodium dodecyl sulfate, SDS) are investigated, using small-angle neutron scattering (SANS). SANS spectra are analysed by using a core-shell model to describe the form factor of self-assembled surfactant micelles; the intermicellar interactions are modelled by using a hard-sphere Percus–Yevick (HS-PY) or a rescaled mean spherical approximation (RMSA) structure factor. Choosing these specific nonionic surfactants allows for comparison of the effect of branched (Tween20) and linear (BrijL23) surfacta

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Straight, Paul D., Joanne M. Willey, and Roberto Kolter. "Interactions between Streptomyces coelicolor and Bacillus subtilis: Role of Surfactants in Raising Aerial Structures." Journal of Bacteriology 188, no. 13 (2006): 4918–25. http://dx.doi.org/10.1128/jb.00162-06.

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ABSTRACT Using mixed-species cultures, we have undertaken a study of interactions between two common spore-forming soil bacteria, Bacillus subtilis and Streptomyces coelicolor. Our experiments demonstrate that the development of aerial hyphae and spores by S. coelicolor is inhibited by surfactin, a lipopeptide surfactant produced by B. subtilis. Current models of aerial development by sporulating bacteria and fungi postulate a role for surfactants in reducing surface tension at air-liquid interfaces, thereby removing the major barrier to aerial growth. S. coelicolor produces SapB, an amphipath

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Alexandrova, Lidia A., Ljudmil S. Grigorov, Nikolay A. Grozev, and Stoyan I. Karakashev. "Investigation of Interfacial Free Energy of Three-Phase Contact on a Glass Sphere in Case of Cationic-Anionic Surfactant Aqueous Mixtures." Coatings 10, no. 6 (2020): 573. http://dx.doi.org/10.3390/coatings10060573.

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The wetting of adsorbed surfactants solids is important for various technological applications in particular for the process of foam flotation. The present work aims at calculating the surface tensions of the three phase interfaces at different surfactant concentrations using the Girifalco and Good method. For this purpose, the surface tension and contact angle vs. surfactant concentration of the test substances amines and sulfonates and their mixture were measured for liquid–air interface. Calculated surface tension of solid–air interface vs. concentration for C10 amine and mixed systems are

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Ahmad, Moughes, and Najam Sardar. "Study on Solution Behavior of Green Gemini-Conventional Mixed Systems and their Solubilization Capability Towards Phenanthrene." Oriental Journal Of Chemistry 39, no. 5 (2023): 1214–25. http://dx.doi.org/10.13005/ojc/390514.

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In the present study green ester bonded cationic gemini surfactants, Ethane-1,2-diyl bis (N,N-dimethyl-N-hexadecylammonium acetoxy)dichloride (16E216) and 2,2’-{(oxybis(ethane1,2-diyl)bis(oxy)bis(N-alkyl-N,N-dimethyl-2-hexadecyl oxoethanaminium)dichloride (16E316) were synthesized and evaluated for their various physicochemical and other interaction parameters with their mixtures with conventional surfactants namely (cetyltrimethylammonium bromide (CTAB) and cetyltrimethylammonium chloride (CTAC) by tensiometry. Much lower cmc values of the order of 250 times were observed for 16E216 and 16E31

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Zhao, Jun, Yenan Wang, Wenwen Dong, et al. "A new surfactant-introduction strategy for separating the pure single-phase of metal–organic frameworks." Chemical Communications 51, no. 46 (2015): 9479–82. http://dx.doi.org/10.1039/c5cc02043c.

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Surfactant-directed crystal growth can effectively separate mixed-phase crystals. By introducing different surfactants, two previous mixed-phase Ni(ii)–MOFs constructed from an undeveloped pyridyl-tetracarboxylate and Ni(ii) salts were successfully isolated to obtain two pure products.

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Poša, Mihalj. "Symmetry (Asymmetry) of the Molar Excess Gibbs Free Energy Function of the Binary Mixed Micelles of Bile Acid Anion and Classical Cationic Surfactant: Influence of Sterically Shielded and Sterically Unshielded Polar Groups of the Steroid Skeleton." Symmetry 14, no. 11 (2022): 2337. http://dx.doi.org/10.3390/sym14112337.

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Binary mixtures of surfactants build a binary mixed micelle in which the ratio of surfactants usually differs from the initial ratio of surfactants in their binary mixture. The thermodynamic stabilization of the binary mixed micellar pseudophase about the hypothetical ideal state (intermolecular interactions between the different particles and the conformational states of the particles are identical to those of monocomponent states) is described by the molar excess Gibbs free energy (gE). The dependence of gE on the molar fraction of surfactant i (xi) from the binary mixed micelle can be descr

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Azum, Naved, Malik Abdul Rub, Sulaiman Yahya Alfaifi, and Abdullah M. Asiri. "Interaction of Diphenhydramine Hydrochloride with Cationic and Anionic Surfactants: Mixed Micellization and Binding Studies." Polymers 13, no. 8 (2021): 1214. http://dx.doi.org/10.3390/polym13081214.

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The focus of the present work is to evaluate the interactions of an anti-allergic drug (diphenhydramine hydrochloride, DPH) with anionic (sodium dodecyl sulfate, SDS) and cationic (cetylpyridinium chloride, CPC) surfactants in the aqueous medium. The mixed micellization behavior and surface properties of drug-surfactant mixtures have been examined by surface tension measurements. Various theoretical approaches were applied to explore the synergistic or non-ideal behavior of the current mixed systems. Furthermore, the binding studies of drug with surfactants have been elaborated by UV–visible s

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Nguyen, T. B. N., W. Bae, and T. Q. C. Dang. "Improvements of Mixed-surfactants in Alkaline/Surfactant/Polymer Solutions." Petroleum Science and Technology 32, no. 12 (2014): 1458–64. http://dx.doi.org/10.1080/10916466.2012.669001.

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YING, ZHE, JIN-HONG DU, SHUO BAI, FENG LI, CHANG LIU, and HUI-MING CHENG. "MECHANICAL PROPERTIES OF SURFACTANT-COATING CARBON NANOFIBER/EPOXY COMPOSITE." International Journal of Nanoscience 01, no. 05n06 (2002): 425–30. http://dx.doi.org/10.1142/s0219581x02000449.

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Carbon nanofibers (CNFs) were coated by surfactants of polyoxyetheylene alkyl ether ( AEO 9, AEO 7) and polyvinyl alcohol (PVA 1799), respectively, after being mixed with surfactant aqueous solution and then treated with ultrasonication, high shear and magnetic stirring. The CNF/epoxy composites were prepared by mixing the surfactant coated CNFs with epoxy. Tensile strength, elastic modulus and ultimate strain of the composites were studied. The tensile strength and the ultimate strain of the composites were increased by 20% and 70%, respectively, after the CNFs were coated by surfactants. How

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Yadav, Chandradip Kumar, Ajaya Bhattarai, Tulasi Prasad Niraula, et al. "Critical Analysis of Surfactant-Dye Interaction: A Review." Amrit Journal 3, no. 1 (2023): 66–77. http://dx.doi.org/10.3126/amritj.v3i1.61543.

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The interaction between surfactants and dyes is fundamental in achieving the desired coloration and properties in various applications, shaping the functionality and effectiveness of dye-related processes across multiple industries. Further research and advancements in this field will continue contributing to innovative solutions and improved sustainability. While mixed surfactants offer these advantages, the choice between using a single surfactant or a mixture depends on the specific application, the desired properties, cost considerations, and compatibility with other formulation components

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Abdul Razak, Muhammad Raziman, Pay Jun Liew, Nur Izan Syahriah Hussein, and Qumrul Ahsan. "Effect of Surfactant on EDM of Low Conductivity Reaction-Bonded Silicon Carbide." Key Engineering Materials 701 (July 2016): 107–11. http://dx.doi.org/10.4028/www.scientific.net/kem.701.107.

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This work was focused on improving machining performance of reaction-bonded silicon carbide (RB-SiC) ceramic material using an electrical discharge machine (EDM) with the aid of surfactant. The changes of material removal rate, electrode wear ratio and surface roughness were investigated under two different surfactants, namely Span 20 and Span 80. The surfactant was mixed with carbon nanofiber (CNF) and EDM oil prior to the experiment. Then, the mixture was homogenized in an ultrasonic homogenizer for 35 minutes. In order to investigate the effect of surfactant, different weight percentages wh

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Drennan, Catherine E., Rachelle J. Hughes, Vincent C. Reinsborough, and Oladega O. Soriyan. "Article." Canadian Journal of Chemistry 76, no. 2 (1998): 152–57. http://dx.doi.org/10.1139/v97-226.

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Kinetic studies through stopped-flow spectroscopy were undertaken in the dilute solution range of anionic surfactants where pronounced rate enhancement or inhibition of Ni2+-ligand complexations is often observed at surfactant concentrations much below the critical micelle concentration (CMC). The results are interpreted in terms of Ni-surfactant micelles as the agents responsible for the rate changes in dilute surfactant solution. At higher surfactant concentrations these micelles are transformed into mixed micelles (counterion and size changes), eventually becoming normal surfactant micelles

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Meena, Jagrati, Suresh Kumar Meena, and KM Gangotri. "Enhanced Electrical Output by Mixed Surfactant for Solar Cells: EDTA+TB+NaLS+CPC+Tween-80 system." Oriental Journal Of Chemistry 40, no. 1 (2024): 288–93. http://dx.doi.org/10.13005/ojc/400135.

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Enhancing photogalvanics electrical output in the sphere of solar energy is the goal of the study. The use of fossil fuels is also limitation to energy conversion. The photogalvanic (PG)cell with EDTA + TB + NaLS + CPC + Tween-80 produces superior results than a system with just one surfactant. The photopotential (PP) and photocurrent (PC) of the EDTA+TB + NaLS + CPC + Tween-80 photogalvanics were measured at 689.00 mV and 234.00 uA, respectively. The efficiency and performance of the EDTA+TB+NaLS+CPC+Tween-80 photogalvanics were determined to be 0.2811% and 109.00 minutes, respectively. The p

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Olanrewaju, Owoyomi, Jide Ige, and Soriyan Omopariola. "Alkaline hydrolysis of brilliant green in mixed cationic surfactant systems." Open Chemistry 9, no. 1 (2011): 106–11. http://dx.doi.org/10.2478/s11532-010-0120-1.

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AbstractKinetic measurements were performed for the alkaline hydrolysis of brilliant green — a triphenylmethane dye used as a model compound for probing micellar rate effects. This reaction was studied both in the presence of tetradecyltrimethylammonium bromide (TTAB) and tetradecyltriphenylphosphonium bromide (TTPPBr) and also in binary mixtures of these surfactants at different mole fractions of each. All rate surfactant profiles were analyzed using the pseudo-phase model in order to obtain the regression parameters, including binding constants and rate constants in the micellar pseudo-phase

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Yeh, D. H., and S. G. Pavlostathis. "Development of hexachlorobenzene-dechlorinating mixed cultures using polysorbate surfactants as a carbon source." Water Science and Technology 43, no. 2 (2001): 43–50. http://dx.doi.org/10.2166/wst.2001.0071.

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The use of three nonionic polysorbate surfactants – Tween 60, 61 or 65 – as the sole carbon source to sustain methanogenesis and dechlorination, as well as the effect of long-term exposure of enriched cultures to these surfactants, was investigated through the development of three sediment-derived cultures. Over a one-year period, the carbon source in these cultures was gradually switched from glucose and methanol to surfactant only, while the surfactant concentration was increased from an initial concentration of 100 mg/L to 400 mg/L. In each feeding cycle, the surfactants were partially degr

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Jiao, Jinqing, Tao Li, Guangwen Zhang, et al. "Molecular Dynamics Simulations of the Short-Chain Fluorocarbon Surfactant PFHXA and the Anionic Surfactant SDS at the Air/Water Interface." Molecules 29, no. 7 (2024): 1606. http://dx.doi.org/10.3390/molecules29071606.

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The research and development of alternatives to long-chain fluorocarbon surfactants are desperately needed because they are extremely toxic, difficult to break down, seriously harm the environment, and limit the use of conventional aqueous film-forming foam fire extinguishing agents. In this study, mixed surfactant systems containing the short-chain fluorocarbon surfactant perfluorohexanoic acid (PFHXA) and the hydrocarbon surfactant sodium dodecyl sulfate (SDS) were investigated by molecular dynamics simulation to investigate the microscopic properties at the air/water interface at different

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Mondain-Monval, O., and P. Poulin. "Mixed colloid–surfactant systems." Journal of Physics: Condensed Matter 16, no. 19 (2004): S1873—S1885. http://dx.doi.org/10.1088/0953-8984/16/19/001.

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Moater, Elena Irina, Cristiana Radulescu, and Ionica Ionita. "The Spectrophotometric and Tensiometric Study of Interaction Between Nonionic Surfactants with Acid Dye." Revista de Chimie 68, no. 5 (2017): 1010–13. http://dx.doi.org/10.37358/rc.17.5.5600.

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The study of the interaction between nonionic surfactants and acid dyes is very important in clarifying the mechanism of wool dyeing and colors preservation and also for the washing conditions determination. This paper presents the spectrophotometric and tensiometric data of the interaction between the alkyl polyglucosides surfactants class with new synthesized dye, from the class of azoic dyes derived from 3H-aza-1-oxa-2H-tioxo-5,8-fenalendisulfonic acid. A multiplicity of transitions is observed, when the surface tension of aqueous solutions of nonionic surfactant (APG) in the presence of th

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Akbar, Javed R., Rubena Deubry, D. Gerrard Marangoni, and Shawn D. Wettig. "Interactions between gemini and nonionic pharmaceutical surfactants." Canadian Journal of Chemistry 88, no. 12 (2010): 1262–70. http://dx.doi.org/10.1139/v10-135.

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The nature and strength of the interactions between the 1,3-bis(dimethylhexadecyl)propanediammonium dibromide (16-3-16) gemini surfactant and a homologous series of nonionic polyoxyethylene (20) sorbitan ester surfactants having laurate (Tween 20), stearate (Tween 60), or oleate (Tween 80) alkyl tails has been investigated. The critical micelle concentration (cmc) values of the mixed gemini–tween systems were determined using the du Noüy ring surface tension method, and the results have been analyzed using Clint’s, Rubingh’s, Motomura’s, and Maeda’s theories for mixed micellar systems. The res

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Liu, Z. Q. "Synergistic enhancement of glyphosate uptake into grasses by adjuvant combinations." Australian Journal of Agricultural Research 55, no. 4 (2004): 415. http://dx.doi.org/10.1071/ar03166.

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The influence of various adjuvant combinations on the uptake of glyphosate was examined using a model grass species, wheat. Compared with each of 6 surfactants used alone, a greater uptake enhancement was observed when an aliphatic amine surfactant of higher ethylene oxide (EO) content was mixed with either a linear alcohol or an octylphenol non-ionic surfactant of lower EO content, at equivalent concentration. Surfactant ratio in a mixture was also important in the case of one combination. Three of the positive surfactant combinations were also tested on barnyard grass and their synergistic e

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Calderón, Silvia M., and Nønne L. Prisle. "Composition dependent density of ternary aqueous solutions of ionic surfactants and salts." Journal of Atmospheric Chemistry 78, no. 2 (2021): 99–123. http://dx.doi.org/10.1007/s10874-020-09411-8.

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AbstractSurfactants exist in atmospheric aerosols mixed with inorganic salts and can significantly influence the formation of cloud droplets due to bulk–surface partitioning and surface tension depression. To model these processes, we need continuous parametrizations of the concentration dependent properties of aqueous surfactant–salt solutions for the full composition range from pure water to pure surfactant or salt. We have developed density functions based on the pseudo-separation method and Young’s mixing rule for apparent partial molal volumes for solutions that mimic atmospheric droplets

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