Surfactant solvation effects and micelle formation in ionic liquids

Anderson, Jared L.; Pino, Verónica; Hagberg, Erik C.; Sheares, Valerie V.; Armstrong, Daniel W.

doi:10.1039/b307516h

Cited by 363 publications

(329 citation statements)

References 13 publications

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“…Seyrek et al [31] have shown that the binding constant in the system of -lactoglobulin-poly(vinylsulfate) was inversely related to persistence length of poly(vinylsulfate) chain implying that protein binding to their characteristic hydrophobic-hydrophilic balance, ILs are widely used as surface active agents to study micellization behaviour in water [38][39][40][41][42]. In addition, this particular attribute makes these liquids compatible with many common solvents thereby generating designer solvents with controlled hydrophobicity, polarity and miscibility.…”

Section: Effect Of Persistence Lengthmentioning

confidence: 99%

“…Ionic liquids and their solutions are being used as biocatalytic reaction media, biosensors, protein and enzyme stabilizers etc. [41,42]. Numerous studies have explored protein and enzyme stability in these solvents that conclude that the observed catalytic activity of enzymes was due to the heterogeneously dispersed state of enzymes [43][44][45][46].…”

Section: Effect Of Persistence Lengthmentioning

confidence: 99%

See 1 more Smart Citation

Coacervation in Biopolymers

Rawat¹

2014

J Phys Chem Biophys

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Polyelectrolyte charge; Ionic strength; Surface patch binding; Viscoelastic behavior and internal structure IntroductionCoacervation: Coacervation is a thermodynamic transition which allows a homogeneous solution of charged macroions to undergo liquidliquid phase separation, giving rise to a polymer-rich dense phase coexisting with its supernatant. These two liquid phases are immiscible but are thermodynamically compatible. The polymer-rich dense phase is often called the coacervate. Structurally it lies between the crystalline and liquid phases. Thus, it can bear intermediate range structural order and can be referred to as a mesophase. Coacervation has been mostly studied in aqueous solutions of charged synthetic or biological macromolecules in the past. In particular, protein-polysaccharide and protein-protein coacervates have attracted much attention because of their inherent potential in generating new biomaterials. In addition, such studies provide basic understanding of specific and non-specific interactions operating between complementary polyelectrolytes [1-6] or polyelectrolyte-polyampholyte [7][8][9][10][11][12][13][14][15] pairs. Normally, polysaccharides are strong polyelectrolytes whereas proteins, in addition, can be polyampholytes. Hence, the association problem reduces to that of the general study of interaction between polyelectrolyte (PE) and polyampholyte (PA) molecules [6,16]. A recent review encapsulates many of the anomalous as well as the salient features of protein-polyelectrolyte interactions [1] The phenomenon of protein based coacervates, formed of strong electrostatic interactions, has been reported for β-lactoglobulin-gum Arabic [7,8] [17]. The diversity of material properties associated with coacervates can be gauged from the fact that β-lactoglobulin-gum arabic coacervates were found to be associated with vescicular to sponge-like internal structure whereas whey protein-gum arabic coacervate was observed to be a highly concentrated (melt-like) phase. In contrast, *Corresponding author: Kamla Rawat, Special Center for Nanosciences, Jawaharlal Nehru University, New Delhi 110067, India, Tel: +91 11 2670 4699; Fax: +91 11 2674 1837; E-mail: kamla.jnu@gmail.com β-lactoglobulin-pectin coacervates were found to be a heterogeneous phase comprising of pectin networks with protein domains forming the junction points [17]. It has been shown that a polyelectrolyte, DNA and a polyampholyte, gelatin can undergo associative interaction and form complex coacervates with interesting thermal properties [15]. Further, it has been realized that in a class of systems coacervation transition is governed by surface selective patch binding even though both the polyions carry similar net charge [11,18,19]. In particular, in SPB interactions complementary polyions (normally a PA-PE pair) seek oppositely charged patches to bind overcoming the repulsion occurring between similarly charged surface patches. This is often referred to as binding on the wrong side of pH.The following provides a brief structural i...

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Section: Effect Of Persistence Lengthmentioning

confidence: 99%

Section: Effect Of Persistence Lengthmentioning

confidence: 99%

Coacervation in Biopolymers

Rawat¹

2014

J Phys Chem Biophys

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“…Nowadays, ethylammonium butyrate with a value of 0.576 J m -3 is the solvent with the lowest Gordon parameter known to promote self-assembly of amphiphiles . The self-assembly is not restricted to protic ILs, it has been documented for several aprotic ILs as well (Anderson et al, 2003;Hao et al, 2005;Patrascu et al, 2006). In addition to the extensive amount of research conducted into binary IL/surfactant mixtures progress has been made in the formulation and characterization of nonaqueous microemulsions, the actual topic of this review.…”

Section: Ionic Liquids In Nonaqueous Microemulsionsmentioning

confidence: 99%

Nonaqueous Microemulsions Containing Ionic Liquids – Properties and Applications

Zech¹,

Harrar²,

Kunz³

2011

Ionic Liquids: Theory, Properties, New Approaches

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“…In addition, IL also influenced the formation of the supramolecular assemblies as solvents and co-solvents. (Anderson et al, 2003). The micelle formation is caused by the solvophobic interactions between the hydrocarbon chains of the surfactant molecules just like hydrophobic interactions in aqueous medium.…”

Section: Effects Of Ionic Liquids On the Formation Of Supramolecular mentioning

confidence: 99%