Wyniki wyszukiwania dla: anionic surfactants

• Cationic or anionic surfactant oscillators for molecular recognition of taste substances

  Publikacja

  • M. Szpakowska
  • A. Magnuszewska
  • J. Szwacki

  - Rok 2005

  Otrzymano krzywe oscylacyjne róznicy potencjału elektrochemicznego miedzy fazami wodnymi oscylatora zawierajacego jonowy surfanktant. Były one analizowane poprzez konsrukcje portretów fazowych uzywając metody opóźnienia czasowego. Kształt portertów fazowych jest rożny dla układów z kationowym lub anionowym surfanktantem. Szeregi wzrostu powierzchni atraktorów dla tych dwoch oscylatorów sa także rózne.

• Aggregation of nonionic surfactants in imidazolium ionic liquids

  Publikacja

  • A. Selwent
  • J. Łuczak

  - Rok 2013

  Micellar aggregation of surfactants in aqueous solutions has been described in terms of the balance between dispersive interactions of the hydrocarbon part of the amphiphilic molecule, and the hydration and electrostatic repulsive effects of hydrophilic head group. Changing the interactions by replacing water with another polar solvent, such as amides or glycols, has been studied to a smaller extent (Singh, Saleem et al. 1980;...

• Kinetics and thermodynamics of the reaction of iminodiacetate copper(II) complexes with 1,10-phenanthroline and 2,2′-bipyridine in aqueous, anionic, cationic and nonionic surfactants solutions

  Publikacja

  • J. Drzeżdżon
  • A. Piotrowska
  • D. Wyrzykowski
  • A. Tesmar
  • L. Chmurzyński
  • D. Jacewicz

  - Reaction Kinetics Mechanisms and Catalysis - Rok 2017

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• Investigation of the Electrokinetic Properties of Paraffin Suspension. 2. In Cationic and Anionic Surfactant Solutions

  Publikacja

  • E. Chibowski
  • A. Wiacek
  • L. Holysz
  • K. Terpilowski

  - LANGMUIR - Rok 2005

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• Micelle formation of Tween 20 nonionic surfactant in imidazolium ionic liquids

  Publikacja

  • J. Łuczak
  • A. Selwent
  • J. Hupka

  - COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS - Rok 2015

  Aggregation behavior of polyoxyethylene (POE)-type nonionic surfactant Tween 20 in imidazolium ionic liquids with varying chain length and different anions, such as tetrafluoroborate, hexafluorophosphate, bis(trifluoromethanesulfonyl)imide, and trifluoromethanesulfonate, was investigated by means of surface tension, conductivity and dynamic light scattering measurements. The role of the chain length, anion size as well as interactions...

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• Oscillators with anionic surfactants as systems for molecular recognition of taste substances

  Publikacja

  • M. Szpakowska
  • A. Magnuszewska

  - Rok 2005

  Zaprezentowano, charakterystyki oscylacyjne układów trojfazowych, ktore mogą byc uzyte do rozpoznawania substancji smakowych. Zaobserwowano, że zmiany osylacyjne róznicy potencjału elektrycznego miedzy fazami wodnymi zależą od rodzaju substancji smakowej obecnej w układzie. Ich rózne wartosci poczatkowe są ważną cechą z punktu mozliwości zastosowania tych układów w sensorach smaku. Dla kazdego układu wyznaczono portrety fazowe...

• DETERMINATION OF SURFACTANTS IN ENVIRONMENTAL SAMPLES. PART II. ANIONIC COMPOUNDS

  Publikacja

  • E. Olkowska
  • M. Ruman
  • A. Kowalska
  • Ż. Polkowska

  - Ecological Chemistry and Engineering S - Chemia i Inżynieria Ekologiczna S - Rok 2013

  Surfactants (SAA) with negative charge of polar group are named as anionic compounds. They are main constituent of most products containing synthetic surfactants. The linear alkylbenzene sulfonates (LAS), alkyl ethoxysulfates (AES) and alkyl sulfates (AS) are typically applied from this class of compounds. Those surfactants are ingredients of household detergents and cleaners, laundry detergents, cosmetic. Moreover they can be...

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• SmallAngle Neutron Scattering Study of the Structure of Mixed Micellar Solutions Based on Nonionic and Two Cationic Surfactants

  Publikacja

  • A. Rajewska
  • K. Mędrzycka
  • E. Hallmann

  - PHYSICS OF THE SOLID STATE - Rok 2014

  The aggregation in mixed water systems based on nonionic surfactant, i.e., heptaethylene glycol monotetradecyl ether (C14E7), and cationic surfactants, i.e., cetyltrimethylammonium bromide (CTAB), and cetyltrimethylammonium chloride (CTAC) has been investigated using the smallangle neutron scattering method. The preliminary results of the study of the behavior of C14E7 aqueous solutions (for a concentration of 0.17%) when adding...

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• Similar concentration of surfactants in rural and urban areas

  Publikacja

  • E. Olkowska
  • Ż. Polkowska
  • M. Ruman
  • J. Namieśnik

  - Environmental Chemistry Letters - Rok 2015

  Since surfactants are used in various products, they end up in surface and wastewater. Surfactants may therefore impact ecosystems and living organisms. Actually, only few anionic surfactants and some alkylphenols are regulated. There is no comprehensive evaluation of surfactants in the atmosphere, surfaces and waters of areas of increasing anthropic levels. Here, we measured the levels of cationic, anionic and nonionic surfactants...

• The effect of alkyl chain length on synergistic effects in micellization and surface tension reduction in nonionic gemini (S-10) and anionic surfactants mixtures

  Publikacja

  • A. Trawińska
  • E. Hallmann
  • K. Mędrzycka

  - COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS - Rok 2016

  Mixtures of nonionic gemini surfactant S-10 ( α, α'-[2,4,7,9-tetrametyl-5-decyne-4,7-diyl]bis[ω-hydroxy -polioxyetylene] with anionic SRS (sodium alkylsulfates) and SRSO3 (sodium alkylsulfonates) of different alkyl chain length (from 10 to 14 carbon atoms) were investigated. Surface tension measurements were used to find the cmc values and other adsorption parameters. The Clint, Rubingh’s and Rosen theories were applied for evaluation...

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