Oligo- and polyethylene glycols in water-in-oil microemulsions.: A SANS study

被引：13

作者：

Schübel, D

Bedford, OD

Ilgenfritz, G

Eastoe, J

Heenan, RK

机构：

[1] Univ Cologne, Inst Chem Phys, D-50939 Cologne, Germany

[2] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England

[3] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1999年 / 1卷 / 10期

关键词：

D O I：

10.1039/a900685k

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：

The influence of oligo- and polyethylene glycols (PEG) on ionic aerosol-OT water-in-oil (w/o) microemulsions has been investigated by small-angle neutron scattering (SANS). The scattering curves can be described with a model of polydisperse spheres, using an Omstein-Zernicke structure factor, regardless of the PEG relative molecular mass. The results obtained at a constant temperature difference from the percolation point indicate that the droplet structure is maintained, the core radius is decreased and the polydispersity is increased with increasing PEG chain length. There is good evidence that long-chain PEGs induce aggregation of these droplets. The results support the model of polymer adsorption, which was deduced from the influence of PEGs on the percolation behaviour.

引用

页码：2521 / 2525

页数：5

共 14 条

[1] Effect of PEG on the stability of AOT microemulsions [J].