Influence of Addition Synthetic Surfactants on the Rheological Properties of Argan Oil-In-Water Emulsions

               

K. Rhattas1*, N. Hajjaji1, T. Jazouli1, D. Chebabe1, M. C. Sanchez2, J. M. Madiedo2

1 Faculty of Sciences-Laboratory of Organic Synthesis and Reactivity, B.P 133.14000 Kenitra, Morocco.

2 Laboratory of Rheology-University of Huelva, Crta. De Palos-la Rabida. s/n la Rabida.

 21819. Palos de la Frontera, Huelva. Espagne

* Corresponding author. E-mail: rhattas.karima@caramail.com/ n_hajjaji@hotmail.com

Received: 12 October 2006; revised version accepted: 15 April 2008

 

Abstract

     The main purpose of this study is to establish a correlation between rheometric parameters and Argan oil, mixture of synthetic and polymer emulsifiers prepared to stabilize the emulsions. The rise of the cisaillment modulus value determined in linear response with concentration of emulsions implied an elastic character. The different parameters have been evaluated in rheometric study using steady-state flow and oscillatory measurements (G, G). This study has been developed by optical analysis which of in the experimental results we have shown that:

- The addition of synthetic emulsifiers ST10, 2ST10, ST12 in the emulsion containing 3 wt % by Triton N-101 increase and leads a narrow size droplets provides a formation of network structure which implies an important stability of emulsions;

- Addition of salt (NaCl 0,5 M) in emulsion implies reduction of viscoelasticity this decrease related to a  double layer between droplets which ionic strength increase should lead to instability;

     We conclude that the Synthetic emulsifiers have an emulsifiant and stabilizing character of emulsions, this stability depends on the nature and concentration of emulsifiers.

 

Keywords:  Rheology; Triazole; Emulsions; Argan Oil; Steady-state flow; Oscillatory.

2015