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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2289
Title: Effects of various factors on the interfacial mass transfer phenomenon and dispersion of polyaniline in an aqueous/organic bi-/tri-phasic system
Authors: Dutta K.
Kumar P.
Das S.
Kundu, Patit Paban
Published in: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Abstract: Upon electrostatic interaction between positive charge-bearing oxidized polyaniline and negatively charged amphiphile molecules (AMs), the AMs get attached onto the polymer chains, resulting in charge neutralization and formation of hydrophobic cover on the polymer surface. In an interfacial polymerization setup, comprising of an aqueous/organic interface, this attachment phenomenon essentially leads to aqueous-to-organic phase transfer of the in situ synthesized polymer. As a result, the initial fine dispersion of polyaniline obtained in the aqueous phase gets converted to a fine dispersion in the organic phase. These fine dispersions in either phase shall render the possibility of better solution processing ability of this otherwise 'difficult-to-process' polymer. Herein, we demonstrate how factors like temperature, rate and extent of agitation, concentration of AMs, nature and number of organic phases, phase composition, natural interfacial presence of AMs, and gravity affect the extent of phase transfer. While, both the extent of transfer and the time required for achieving the maximum transfer depended on the concentration of AMs below its critical aggregation concentration, only the latter was found to vary with the rate of stirring. Presence of interfacial AMs, gravity, and the number and nature of the organic phases were all found to affect the transfer process. © 2013 Elsevier B.V.
Citation: Colloids and Surfaces A: Physicochemical and Engineering Aspects (2013), 436(): 830-838
URI: https://doi.org/10.1016/j.colsurfa.2013.07.046
http://repository.iitr.ac.in/handle/123456789/2289
Issue Date: 2013
Publisher: Elsevier B.V.
Keywords: Amphiphiles
Dispersion
Interface
Phase transfer
Polyaniline
ISSN: 9277757
Author Scopus IDs: 7005115695
55642355800
55820818900
35475516300
Author Affiliations: Dutta, K., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India
Kumar, P., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India
Das, S., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India
Kundu, P.P., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India
Funding Details: KD thanks the Council of Scientific and Industrial Research (CSIR) for a Senior Research Fellowship. PK is thankful to the Department of Science and Technology (Govt. of India) for providing the INSPIRE fellowship.
Corresponding Author: Kundu, P.P.; Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India; email: ppk923@yahoo.com
Appears in Collections:Journal Publications [CH]

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