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Title: Collapse and coacervation of a lamellar phase by inter-headgroup bridging
Authors: Pal, Antara
Bharath, P.
Dastidar, Sudipta G.
Raghunathan, V.A.
Issue Date: 28-Jan-2012
Publisher: Royal Society of Chemistry
Citation: Soft Matter, 2012, Vol.8, p927
Abstract: We report the collapse of an electrostatically swollen surfactant lamellar phase above a critical concentration of an added nonionic surfactant due to hydrogen bonding between the two types of headgroups. At still higher concentrations of the neutral surfactant a temperature-driven lamellar to coacervate transition is observed. Small-angle X-ray diffraction pattern of the coacervate can be modeled as arising from bilayers with short-range positional correlations, whereas cryo-scanning electron microscopy images show bilayer-like features riddled with pores. Very similar behavior is found when the nonionic polyoxyethylene alkyl ether surfactant is replaced by polyethylene glycol of sufficiently high molecular weight.
Description: Restricted Access.
ISSN: 1744-683X
1744-6848 (Online)
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Copyright: 2012 Royal Society of Chemistry
Appears in Collections:Research Papers (SCM)

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