Polyelectrolyte-surfactant association—from fundamentals to applications

Lindman, Björn; Antunes, Filipe E.; Aidarova, Saule; Miguel, Maria; Nylander, Tommy

doi:10.1134/s1061933x14050111

Cited by 74 publications

(59 citation statements)

References 61 publications

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“…11 Such interactions underpin a number of important consumer applications, including systems for targeted storage, delivery and controlled release, with the presence of both polyelectrolyte and oppositely-charged surfactant giving rise to complementary, and sometimes synergistic effects. 12 A number of fundamental studies have explored the interactions which underpin this kind of binding, and it is generally understood that counter-ions are displaced from the micelle surface and replaced with the polyelectrolyte. 13 Li and Wagner tried to consolidate many of these studies and reported universal binding behaviour for ionic alkyl surfactants with polyanions, noting the importance of surfactant hydrophobicity and polymer charge density in controlling cooperative binding strength.…”

Section: Introductionmentioning

confidence: 99%

Emergence of highly-ordered hierarchical nanoscale aggregates on electrostatic binding of self-assembled multivalent (SAMul) cationic micelles with polyanionic heparin

et al. 2017

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Article:Smith, David Kelham orcid.org/0000-0002-9881-2714 (2017) Emergence of highly-ordered hierarchical nanoscale aggregates on electrostatic binding of self-assembled multivalent (SAMul) N-di-(3-aminopropyl)-N-methylamine (DAPMA) head groups and aliphatic chains connected via an amide linkage, and investigate their ability to self-assemble and bind polyanionic heparin a process of potential clinical importance in coagulation control. Modifying the hydrophobic chain length tunes the self-assembly event, with C16-DAPMA having the lowest critical micelle concentration and also being the optimal heparin binder. Remarkably highly structured hierarchical nanoscale aggregates are formed on binding between the spherical cationic micelles and linear polyanionic heparin. C14-DAPMA and C16-DAPMA yield organized polycrystalline assemblies as observed by transmission electron microscopy (TEM), predicted in solution by mesoscale simulations and characterized by small-angle X-ray scattering (SAXS). This confirms that the micelles remain intact during the hierarchical assembly process and become packed in a face-centered cubic manner. The nanoscale assembly formed by C16-DAPMA showed the highest degree of order. Importantly, these studies indicate the impact of hydrophobic modification on self-assembly and heparin binding, demonstrate remarkably high stability of these self-assembled micelles even when forming strong electrostatic interactions with heparin, and provide structural insights into nanoscale hierarchical electrostatic assemblies.

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Section: Introductionmentioning

confidence: 99%

Emergence of highly-ordered hierarchical nanoscale aggregates on electrostatic binding of self-assembled multivalent (SAMul) cationic micelles with polyanionic heparin

et al. 2017

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“…10,11 In this context, the representative polymer materials used for ethanol-permselective membrane were mainly silicon-containing polymers, such as polydimethylsiloxane (PDMS), [12][13][14][15] poly[1-(trimethylsilyl)-1-propyne] (PTMSP) 16,17,18 and their derivatives 19,20 . 28 To date, PESC membranes (PESCMs) have been exploited as PV membranes, but only for the purpose of separating organic-organic mixtures. In order to enhance the PV performance, attempts have been made to modify PDMS in different ways.…”

Section: Introductionmentioning

confidence: 99%

Preparation and pervaporation characteristics of novel ethanol permselective polyelectrolyte–surfactant complex membranes

et al. 2015

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Recovery of ethanol from low concentration aqueous solution is a critical step for biofuel production. Pervaporation as an energy-efficient separation technology is attracting greater attention in ethanol retrieving.Here we introduce polyelectrolyte-surfactant complexes (PESCs) as membrane materials for ethanol recovery from aqueous solution. PESCs with controlled degree of complexation (DC) were prepared by mixing polyacrylic acid sodium (PAANa) and hexadecyltrimethylammonium bromide (CTAB) at different pH. Both the PESCs and their membranes (PESCMs) were characterized. Pervaporation data show that PESCMs could selectively transport ethanol molecules in the feed, and PESCM with the highest hydrophobicity gives the optimum performances in terms of selectivity. For example, the most hydrophobic PESCM (DC 0.79) features the optimum separation factor of 5.38 couple with a high flux of 4.23 kg m -2 h -1 in processing 5 wt% ethanolwater feed mixture at 30 0 C. The PESCM, which is low cost in terms of starting materials and manufacture engineering, represents an alternative membrane system with considerable potential for biofuel production.

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“…Taking into account the characteristics of the synthesized metallosufactants, electrostatic attractive interactions between the positive heads of both surfactants and the negative phosphate residues of the DNA backbone are expected. The hydrophobic interactions among the tails of the surfactants and the polynucleotide, driven by the entropy of the counterion distribution [23], provoke a conformational modification in the DNA structure, generally related to the condensation of the DNA strands.…”

Section: Resultsmentioning

confidence: 99%

Cooperative interaction between metallosurfactants, derived from the [Ru(2,2′-bpy)3]2+ complex, and DNA

Lebrón

Ostos

Moyá

et al. 2015

Colloids and Surfaces B: Biointerfaces

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Polyelectrolyte-surfactant association—from fundamentals to applications

Cited by 74 publications

References 61 publications

Emergence of highly-ordered hierarchical nanoscale aggregates on electrostatic binding of self-assembled multivalent (SAMul) cationic micelles with polyanionic heparin

Emergence of highly-ordered hierarchical nanoscale aggregates on electrostatic binding of self-assembled multivalent (SAMul) cationic micelles with polyanionic heparin

Preparation and pervaporation characteristics of novel ethanol permselective polyelectrolyte–surfactant complex membranes

Cooperative interaction between metallosurfactants, derived from the [Ru(2,2′-bpy)3]2+ complex, and DNA

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