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Titolo:
Interfacial properties of nonionic micellar aggregates as a function of temperature and concentration
Autore:
Briganti, G; DArrigo, G; Falconi, L; Maccarini, M;
Indirizzi:
Univ La Sapienza, Dept Phys, INFM, I-00185 Rome, Italy Univ La Sapienza Rome Italy I-00185 Dept Phys, INFM, I-00185 Rome, Italy Univ La Sapienza, Dept Energet, INFM, I-00185 Rome, Italy Univ La Sapienza Rome Italy I-00185 t Energet, INFM, I-00185 Rome, Italy Univ Sheffield, Dept Phys, INFM Roma 1, Sheffield, S Yorkshire, England Univ Sheffield Sheffield S Yorkshire England field, S Yorkshire, England
Titolo Testata:
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
fascicolo: 1, volume: 164, anno: 2000,
pagine: 19 - 25
SICI:
0927-7757(20000430)164:1<19:IPONMA>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
WATER; VELOCITY;
Keywords:
interfacial properties; nonionic micellar aggregates; temperature; concentration;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Briganti, G Univ La Sapienza, Dept Phys, INFM, PA Moro 2, I-00185 Rome, Italy Univ La Sapienza PA Moro 2 Rome Italy I-00185 185 Rome, Italy
Citazione:
G. Briganti et al., "Interfacial properties of nonionic micellar aggregates as a function of temperature and concentration", COLL SURF A, 164(1), 2000, pp. 19-25

Abstract

By means of density, dielectric spectroscopy and sound velocity measurements we perform a systematic study on the polyoxyethylene C12E6 nonionic surfactant solutions as a function of temperature and concentration. Both density and sound velocity data, at about 34 degrees C, coincide with the value obtained for pure water. Above this temperature the density is lower than the water density whereas below, it is greater, the opposite happens for thecompressibility. Combining results from these different techniques we attempt a detailed description of the evolution of the micellar interfacial properties with temperature. It is well known that nonionic surfactant solutions dehydrate with growing temperature. Our results indicate that this process is associated with a continuous change in the polymer conformation and in the local density of the micellar interface. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 09:18:14