α-sulfonated fatty acid esters: II. Solution behavior of α-sulfonated fatty acid polyethylene glycol esters |
| |
Authors: | Tomomichi Okano Naoyuki Egawa Masami Fujiwara Masahiro Fukuda |
| |
Affiliation: | (1) Surface Science Research Center, Lion Corporation, 7-13-12, Hirai, Edogawa-ku, 132 Tokyo, Japan;(2) Present address: Better-Living Laboratories, Lion Corporation, 7-13-12, Hirai, Edogawa-ku, 132 Tokyo, Japan |
| |
Abstract: | Sodium α-sulfonated, fatty acid polyethylene glycol monoesters C
m
H2m+1CH(SO3Na)COO(C2H4O)
n
H] and diesters C
m
H2m+1CH(SO3Na)COO(C2H4O)
n
COCH(SO3Na)C
m
H2m+1], wherem=10–16 andn=1–35, were prepared by esterification of α-sulfonated, fatty acids with polyethylene glycols, followed by neutralization
with NaOH. Crude products were purified by reversed-phase column chromatography on an octadecyl-modified silica gel. Characteristic
solution behavior of these α-sulfonated fatty acid esters was, examined, and the following features were observed. All monoesters
prepared in this work had Krafft points below 0°C and also possessed good calcium stabilities. Critical micelle concentrations
of the monoesters increased monotonously, as a rule, with an increase in the number of oxyethylene units. These results suggest
that the polyethylene glycol residue of the monoester behaves as a hydrophile. On the other hand, diesters possessed high
water solubility, low foamability, and critical micelle concentrations that were lower by a factor of ten compared to those
of the monoesters. |
| |
Keywords: | Calcium stability critical micelle concentration foaming property interfacial tension Krafft point polyethylene glycol diesters polyethylene glycol monoesters solution behavior structural effect |
本文献已被 SpringerLink 等数据库收录! |
|