CRITICAL DEMICELLIZATION CONCENTRATION OF DIETHYLAMMONIUM PERFLUORONONANOATE AND DIETHYLAMMONIUM TETRADECYL SULFATE MIXTURE IN AQUEOUS-SOLUTION | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

3860184

Reference Type

Journal Article

Title

CRITICAL DEMICELLIZATION CONCENTRATION OF DIETHYLAMMONIUM PERFLUORONONANOATE AND DIETHYLAMMONIUM TETRADECYL SULFATE MIXTURE IN AQUEOUS-SOLUTION

Author(s)

Asakawa, T; Shiraishi, T; Sunazaki, S; Miyagishi, S

Year

1995

Is Peer Reviewed?

Yes

Journal

Bulletin of the Chemical Society of Japan
ISSN: 0009-2673
EISSN: 1348-0634

Volume

Issue

Page Numbers

2503-2509

DOI

10.1246/bcsj.68.2503

Web of Science Id

WOS:A1995TA77500008

Abstract

The micellar pseudophase diagram of diethylammonium perfluorononanoate (DEAPFN) and diethylammonium tetradecyl sulfate (DEATS) was determined by both conductivity and fluorescence probe methods. The conductivity measurements gave unusually low dissociation degrees of counter ion for DEAPFN-rich regions in contrast to those for DEATS-rich region. The micelles in a DEAPFN-rich region have high microviscosities, suggesting a micellar growth. The existence of the second cmc indicated the presence of two types of mixed micelles, but the mutual solubility of fluorocarbon and hydrocarbon surfactants in micellar pseudophase showed significant differences between DEAPFN-DEATS and LiPFN-LiTS systems. Third inflection points on both conductivity and fluorescence intensity curves were observed for DEAPFN-DEATS system. This suggests the presence of a critical demicellization concentration (CDC).