Results 241 to 250 of about 29,099 (296)

Nonionic Surfactants

2017
Distribution of the polyoxyethylene chain polyoxyethylene alkylphenols polyoxyethylene alcohols polyoxyethylene esters of fatty acids polyoxyethylene mercaptans polyoxyethylene alkylmines nonionic surfactants containing an amide group polyol ester surfactants nonionics as intermediate for ionic surfactants.
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Novel nonionic siloxane surfactants

Applied Organometallic Chemistry, 1992
AbstractA new method for ethoxylation without application of pressure is described. Butynediololigo(oxyethylene) [H(OCH2CH2)nOCH2CCCH2O(CH2CH2O)nH with n=1–16] has been prepared in the presence of an electrophilic catalyst in a specially developed reciruculating apparatus. The products have been characterized by NMR and IR spectroscopy.New nonionic
R Wersig, G Sonnek, C Niemann
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Clouding of nonionic surfactants

Current Opinion in Colloid & Interface Science, 2016
Nonionic surfactants have broad applications such as cleaning and dispersion stabilization, which frequently are hampered by strong temperature sensitivities. As manifested by clouding and decreased solubility with increasing temperature, the interaction between water and the oligo(oxyethylene) head-groups is becoming less favorable.
Lindman, Bjorn, Medronho, Bruno, Karlstrom, Gunnar   +2 more
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Competitive Adsorption of Nonionic Surfactant and Nonionic Polymer on Silica

Langmuir, 2007
Competitive adsorption of the nonionic polymer poly(ethylene oxide) (PEO) and the nonionic surfactant of the type poly(ethylene oxide) alkyl ether from aqueous solutions on a silica surface is examined. From one-component solutions, both species readily adsorb onto silica and, in the bulk of mixed (two-component) solutions, polymer-surfactant complexes
Postmus, B.R., Leermakers, F.A.M., Koopal, L.K., Cohen Stuart, M.A.   +3 more
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Nonionic Surfactants

2000
Structure and nomenclature of surface-active alkyl glucosides synthesis of alkyl glucosides and alkyl polyglucosides chemical properties and derivatization of surface-active alkyl glucosides and alkyl polyglucosides surfactant properties analytical chemistry of alkyl polyglucosides ecology toxicology and dermatology application.
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Biodegradation of nonionic surfactants

Journal of the American Oil Chemists' Society, 1984
AbstractThis paper discusses the biodegradability of alcohol‐based nonionics measured by the recommended legislative test procedures and how the results obtained are affected by the chemical structure of the surfactant, and thus provides guidance on the selection of materials.
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Activity of Nonionic Surfactants

Russian Journal of Applied Chemistry, 2001
The surface activity of block copolymers of ethylene and propylene oxides, based on ethylenediamine, mono(ethylene glycol), and triethanolamine, was studied. Adsorption characteristics of the investigated compounds at the water-air interface are estimated.
B. R. Fakhrutdinov, O. A. Varnavskaya, L. K. Khvatova, N. A. Lebedev, I. N. Diyarov, R. Z. Fakhrutdinov   +5 more
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Dissolution Rates of Pure Nonionic Surfactants

Langmuir, 2000
no ...
Chen, B. H., Miller, C. A., Walsh, J. M., Warren, P. B., Ruddock, J. N., Garrett, P. R., Argoul, Françoise, Léger, Christophe   +7 more
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Nonionic surfactants in cylindrical hydrophilic pores

Progress in Colloid & Polymer Science, 1997
A mean field lattice (MFL) theory has been used to study the adsorption behaviour of nonionic surfactants in hydrophilic cylindrical pores. The theory predicts that with decreasing pore radius the absorbed amount decreases. Moreover, the step in the adsorption isotherm, which is a first-order phase transition in the mean field approximation, shifts to ...
Huinink, H.P., de Keizer, A., Leermakers, F.A.M., Lyklema, J.   +3 more
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Interfaces Charged by a Nonionic Surfactant

The Journal of Physical Chemistry B, 2018
Highly hydrophobic, water-insoluble nonionic surfactants are often considered irrelevant to the ionization of interfaces at which they adsorb, despite observations that suggest otherwise. In the present study, we provide unambiguous evidence for the participation of a water-insoluble surfactant in interfacial ionization by conducting electrophoresis ...
Joohyung Lee, Zhang-Lin Zhou, Sven Holger Behrens   +2 more
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