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Vol. 26 No. 20 (2014)

Copyright (c) 2014 Hazrat Ali1, Azim Khan1, Irfan Ullah2, Gulrez Fatima Durrani1, Musa Kaleem Baloch2, Abdur Rauf3, Ayesha Niazi1, Muhammad Akram4

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This work is licensed under a Creative Commons Attribution 4.0 International License.

Variant Molar Mass and Concentration Effect of Polyethylene Glycol over the Physico-Chemical Behaviour of CTAB and SDS

https://doi.org/10.14233/ajchem.2014.16924
Hazrat Ali1
1Department of Chemistry, Gomal University, Dera Ismail Khan-29050, Pakistan 2Department of Chemistry, University of Sargodha Sub-Campus Bhakkar-30000, Pakistan 3Department of Chemistry, University of Science and Technology, Bannu-28100, Pakistan 4Medicinal Botanic Center, PCSIR Labs Complex, Peshawar-25120, Pakistan *Corresponding author: E-mail: smileplease79@gmail.com
Azim Khan1
1Department of Chemistry, Gomal University, Dera Ismail Khan-29050, Pakistan 2Department of Chemistry, University of Sargodha Sub-Campus Bhakkar-30000, Pakistan 3Department of Chemistry, University of Science and Technology, Bannu-28100, Pakistan 4Medicinal Botanic Center, PCSIR Labs Complex, Peshawar-25120, Pakistan *Corresponding author: E-mail: smileplease79@gmail.com
Irfan Ullah2
1Department of Chemistry, Gomal University, Dera Ismail Khan-29050, Pakistan 2Department of Chemistry, University of Sargodha Sub-Campus Bhakkar-30000, Pakistan 3Department of Chemistry, University of Science and Technology, Bannu-28100, Pakistan 4Medicinal Botanic Center, PCSIR Labs Complex, Peshawar-25120, Pakistan *Corresponding author: E-mail: smileplease79@gmail.com
Gulrez Fatima Durrani1
1Department of Chemistry, Gomal University, Dera Ismail Khan-29050, Pakistan 2Department of Chemistry, University of Sargodha Sub-Campus Bhakkar-30000, Pakistan 3Department of Chemistry, University of Science and Technology, Bannu-28100, Pakistan 4Medicinal Botanic Center, PCSIR Labs Complex, Peshawar-25120, Pakistan *Corresponding author: E-mail: smileplease79@gmail.com
Musa Kaleem Baloch2
1Department of Chemistry, Gomal University, Dera Ismail Khan-29050, Pakistan 2Department of Chemistry, University of Sargodha Sub-Campus Bhakkar-30000, Pakistan 3Department of Chemistry, University of Science and Technology, Bannu-28100, Pakistan 4Medicinal Botanic Center, PCSIR Labs Complex, Peshawar-25120, Pakistan *Corresponding author: E-mail: smileplease79@gmail.com
Abdur Rauf3
1Department of Chemistry, Gomal University, Dera Ismail Khan-29050, Pakistan 2Department of Chemistry, University of Sargodha Sub-Campus Bhakkar-30000, Pakistan 3Department of Chemistry, University of Science and Technology, Bannu-28100, Pakistan 4Medicinal Botanic Center, PCSIR Labs Complex, Peshawar-25120, Pakistan *Corresponding author: E-mail: smileplease79@gmail.com
Ayesha Niazi1
1Department of Chemistry, Gomal University, Dera Ismail Khan-29050, Pakistan 2Department of Chemistry, University of Sargodha Sub-Campus Bhakkar-30000, Pakistan 3Department of Chemistry, University of Science and Technology, Bannu-28100, Pakistan 4Medicinal Botanic Center, PCSIR Labs Complex, Peshawar-25120, Pakistan *Corresponding author: E-mail: smileplease79@gmail.com
Muhammad Akram4
1Department of Chemistry, Gomal University, Dera Ismail Khan-29050, Pakistan 2Department of Chemistry, University of Sargodha Sub-Campus Bhakkar-30000, Pakistan 3Department of Chemistry, University of Science and Technology, Bannu-28100, Pakistan 4Medicinal Botanic Center, PCSIR Labs Complex, Peshawar-25120, Pakistan *Corresponding author: E-mail: smileplease79@gmail.com

Corresponding Author(s) : Hazrat Ali1

Asian Journal of Chemistry, Vol. 26 No. 20 (2014)

Abstract

Ionic surfactant such as sodium dodecylsulfate (SDS) and N-cetyl N,N,N-trimethyl ammonium bromide (CTAB) has been tensiometrically and conductometrically studied in the presence and absence of water soluble polymer i.e., varying concentration and molar mass of poly(ethylene glycol). Surface tension study shows that poly(ethylene glycol) (PEG) is surface active and its mixture with CTAB and SDS effect the CMC of these surfactants i.e., CMC of CTAB increases with addition of PEG, changes more when concentration or molar mass increases while the effect is opposite for SDS. The surface tension curve of the mixed system of CTAB-PEG show that after CMC, CTAB molecules replace all the PEG molecules or its loops while in case of SDS-PEG some molecules or loop of the polymer always been present at the interface beyond CMC of SDS. Thermodynamic parameters calculated for the mixed systems shows that free energy of micellization for CTAB-PEG increases with the increase in concentration and molar mass of polymer, but opposite result was observed for SDS-PEG mixture. The conductometric and tensiometric results, regarding micellization were comparable. Whereas, different micellization behavior of CTAB and SDS in the presence of PEG is due to the hydrophobic interaction and ion dipole interaction between CTAB-PEG and SDS-PEG, respectively.

Keywords

Ionic surfactant Poly(ethylene glycol) Molar mass Interface Ion dipole interaction Hydrophobic interaction.
Ali1, H., Khan1, A., Ullah2, I., Fatima Durrani1, G., Kaleem Baloch2, M., Rauf3, A., … Akram4, M. (2014). Variant Molar Mass and Concentration Effect of Polyethylene Glycol over the Physico-Chemical Behaviour of CTAB and SDS. Asian Journal of Chemistry, 26(20), 6808–6814. https://doi.org/10.14233/ajchem.2014.16924
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