Study of the Colloidal Interactions Between Microemulsion Nanodroplets in the Presence of Telechelic Polymers: Theory and Experiment

R. Ahfir; A. Azougarh; M. Benhamou; M. Filali

doi:10.15866/irephy.v8i3.1832

Study of the Colloidal Interactions Between Microemulsion Nanodroplets in the Presence of Telechelic Polymers: Theory and Experiment

R. Ahfir⁽¹⁾, A. Azougarh⁽²⁾, M. Benhamou⁽³⁾, M. Filali^(4*)

^(*) Corresponding author

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Abstract

The aim of this work is an extensive study of the colloidal interactions between positively charged O/W microemulsion spherical nanodroplets, in the presence of telechelic polymers PEO-m (one end-grafted) or PEO-2m (double end-grafted) by using Small Angle Neutron Scattering. First, we compute the structure factor using the Ornstein-Zernike integral equation approach together with the hypernetted chain (HNC) closure relation, with an effective pair potential for each experimental situation. Second, we show that adding PEO-m strengthens repulsive interaction, while an addition of PEO-2m induces rather an attractive interaction by bridging between nanodroplets. Finally, the agreement between the calculated and experimental spectra is reasonable and allows a quantitative description for each mixed system.
Copyright © 2014 Praise Worthy Prize - All rights reserved.

Keywords

Microemulsion; Telechelic Polymers: PEO-M; PEO-2m; Small Angle Neutron Scattering; Ornstein-Zernik; Structure Factor

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