EFFECT OF DOUBLE-BOND ON THE SURFACE-PROPERTIES OF AQUEOUS-SOLUTIONS OF EICOSAPOLYENOIC ACIDS

被引：17
|
作者：
YOKOYAMA, S [1 ]
NAKAGAKI, M [1 ]
机构：
[1] TOKYO INST COLLOID SCI,TOKYO,JAPAN
来源：
COLLOID AND POLYMER SCIENCE | 1993年 / 271卷 / 05期
关键词：
EICOSAPOLYENOIC ACID; SURFACE TENSION; DOUBLE BOND; CRITICAL MICELLE CONCENTRATION; ADSORPTION AT AIR WATER INTERFACE;
D O I：
10.1007/BF00657397
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：
Surface tensions of aqueous solution of eicosapolyenoic acids (EA) with 2 approximately 5 double bonds were measured by use of a Du Nouy tensiometer at pH 7.80 and 25-degrees-C, and the effects of double bond on the surface properties of EA were investigated. The value of critical micelle concentration of EA increased twofold with increasing number of double bonds. The free energy for the adsorption per double bond at the air-water interface was estimated as 2.47 kj (double bond)-1, and the negative value of free energy for the adsorption of EA molecule decreased with increasing number of double bonds.
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页码：512 / 518
页数：7
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