NAVRACHANA UNIVERSITY

Test of Hofmeister-like series of anionic headgroups: clouding and micellar growth

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dc.contributor.author Kumar, Sanjeev
dc.contributor.author Patel, Harsha
dc.contributor.author Sandeep R. Patil
dc.date.accessioned 2016-05-11T09:24:39Z
dc.date.available 2016-05-11T09:24:39Z
dc.date.issued 2013
dc.identifier.issn 1435-1536 (Online)
dc.identifier.issn 0303-402X (Print)
dc.identifier.other 10.1007/s00396-013-2942-9
dc.identifier.uri http://27.109.7.66:8080/xmlui/handle/123456789/264
dc.description Colloid and Polymer Science, Volume 291, Issue 9 , pp 2069-2077 en_US
dc.description.abstract Phenomenon of clouding in charged micellar solutions is a fairly recent addition to conventional phenomenon shown by aqueous nonionic micelles. In this paper, we have tested a Hofmeister-like ordering of charged headgroups in the context of cloud point (CP) and micellar growth. For this purpose, we have used various combinations of surfactant (sodium dodecyl sulfate, SDS; sodium dodecylbenzene sulfonate, SDBS; sodium salts of α-sulfonato myristic acid methyl ester, MES; and α-sulfonato palmitic acid methyl ester, PES) and tetra-n-butylammonium bromide (TBAB). Different surfactant concentrations and TBAB concentrations are used and CP measurements have been performed. CP values were found in the order SDBS < SDS < PES < MES for the same concentration of surfactant and TBAB. This order has been discussed in the light of water affinities of interacting ionic species (i.e., surfactant headgroup and TBA+ counterion). The ordering was found similar for the case of micellar growth studied by dynamic light scattering (DLS). A bimodal distribution of aggregate size was found that transforms to giant aggregates at CP. The micelles of roughly 10-nm size convert to aggregates of 1 μm. The study has a few novelties: (1) headgroup dependence of CP, (2) micellar growth on heating, and (3) confirmation of Hofmeister-like series of headgroup. en_US
dc.language.iso en en_US
dc.publisher Springer Berlin Heidelberg en_US
dc.subject Surfactant en_US
dc.subject Cloud point en_US
dc.subject Hofmeister series en_US
dc.subject Micelle en_US
dc.subject Dynamic light scattering en_US
dc.title Test of Hofmeister-like series of anionic headgroups: clouding and micellar growth en_US
dc.type Article en_US


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