LOW-FREQUENCY DIELECTRIC INVESTIGATIONS IN POLYMER-LIKE LECITHIN GELS

被引：17
|
作者：
ALIOTTA, F
FONTANELLA, ME
GALLI, G
LANZA, M
MIGLIARDO, P
SALVATO, G
机构：
[1] UNIV MESSINA,DIPARTIMENTO FIS,I-98166 MESSINA,ITALY
[2] UNIV MESSINA,INFM,I-98166 MESSINA,ITALY
来源：
JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 03期
关键词：
D O I：
10.1021/j100105a033
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：
In this work, we present the results from dielectric measurements on soybean lecithin/isooctane/water gel. The pure solvent and the solution of lecithin in isooctane are also investigated for comparison. A low-frequency dielectric dispersion of the complex permittivity epsilon* is evidenced in the gel and analyzed within the framework of the phenomenological Cole-Cole model. The frequency of the maximum in the dielectric loss shows an Arrhenian behavior as a function of the temperature; this behavior is interpreted in terms of a strong influence of H20 diffusive motion, inside micelles, on the lecithin dipole reorientations.
引用
收藏
页码：733 / 736
页数：4
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