Small-angle neutron scattering from lecithin reverse micelles

被引：13

作者：

Aliotta, F ^{[1
]}

Fontanella, ME ^{[1
]}

Sacchi, M ^{[1
]}

Vasi, C ^{[1
]}

LaManna, G ^{[1
]}

TurcoLiveri, V ^{[1
]}

机构：

[1] UNIV PALERMO, DIPARTIMENTO CHIM FIS, I-90123 PALERMO, ITALY

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1996年 / 383卷 / 1-3期

关键词：

small angle neutron scattering; lecithin; micelles;

D O I：

10.1016/S0022-2860(96)09274-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report new results of small-angle neutron scattering from cyclohexane-d(12)/lecithin/water micellar solutions, performed as a function of the water content, w(0), the temperature, T and the dispersed-phase volume fraction, phi. The data from dilute samples can be interpreted in terms of the existence of giant cylindrical reverse micelles, in good agreement with the current idea of an unlimited micellar growth with phi. In contrast, the appearance of a sharp interference maximum at high concentrations (phi > 0.15) suggests that the current hypothesis of a gel structure interpreted as a random network of entangled micelles can be assumed to be incorrect, and that there must be some caution in assuming analogies with neutral polymer-like systems.

引用

页码：99 / 106

页数：8

共 11 条

[1] PHENOMENOLOGICAL THEORY OF EQUILIBRIUM THERMODYNAMIC PROPERTIES AND PHASE-SEPARATION OF MICELLAR SOLUTIONS [J].

BLANKSCHTEIN, D ;

THURSTON, GM ;

BENEDEK, GB .

JOURNAL OF CHEMICAL PHYSICS, 1986, 85 (12) :7268-7288

[2] REPTATION OF LIVING POLYMERS - DYNAMICS OF ENTANGLED POLYMERS IN THE PRESENCE OF REVERSIBLE CHAIN-SCISSION REACTIONS [J].

CATES, ME .

MACROMOLECULES, 1987, 20 (09) :2289-2296

[3] REPTATION OF A POLYMER CHAIN IN PRESENCE OF FIXED OBSTACLES [J].

DEGENNES, PG .

JOURNAL OF CHEMICAL PHYSICS, 1971, 55 (02) :572-+

[4]

LINDMAN B, 1985, PHYSICS AMPHIPHILES, P94

[5] ORGANOGELS FROM WATER-IN-OIL MICROEMULSIONS [J].

LUISI, PL ;

SCARTAZZINI, R ;

HAERING, G ;

SCHURTENBERGER, P .

COLLOID AND POLYMER SCIENCE, 1990, 268 (04) :356-374

[6] ARE GIANT MICELLES LIVING POLYMERS [J].

MESSAGER, R ;

OTT, A ;

CHATENAY, D ;

URBACH, W ;

LANGEVIN, D .

PHYSICAL REVIEW LETTERS, 1988, 60 (14) :1410-1413

[7] ORGANOGELS FROM LECITHINS [J].

SCARTAZZINI, R ;

LUISI, PL .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (03) :829-833

[8] CYLINDRICAL STRUCTURE AND FLEXIBILITY OF POLYMER-LIKE LECITHIN REVERSE MICELLES [J].

SCHURTENBERGER, P ;

MAGID, LJ ;

KING, SM ;

LINDNER, P .

JOURNAL OF PHYSICAL CHEMISTRY, 1991, 95 (11) :4173-4176

[9] VISCOELASTIC PROPERTIES OF POLYMER-LIKE REVERSE MICELLES [J].

SCHURTENBERGER, P ;

SCARTAZZINI, R ;

LUISI, PL .

RHEOLOGICA ACTA, 1989, 28 (05) :372-381

[10] ON THE APPLICATION OF POLYMER RENORMALIZATION-GROUP THEORY TO POLYMER-LIKE MICROEMULSIONS [J].

SCHURTENBERGER, P ;

CAVACO, C .

JOURNAL DE PHYSIQUE II, 1993, 3 (08) :1279-1288

← 1 2 →