Collapse of polyelectrolyte networks induced by their interaction with oppositely charged surfactants

Khokhlov, Alexei R.; Kramarenko, Elena Yu.; Махаева, Е. Е.; Starodubtsev, S. G.

doi:10.1021/ma00044a045

Cited by 157 publications

(163 citation statements)

References 3 publications

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“…The SDS-watergel interactions are dependent on the hydrophilic character of the network structure as well as of the surfactant properties. This SDS behaviour is well established in charged gels [32][33][34]. In fact, the charged swollen polymer gels form stable complexes with oppositely charged surfactants [34,35].…”

Section: Discussionmentioning

confidence: 67%

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Diffusion coefficients of sodium dodecyl sulfate in water swollen cross-linked polyacrylamide membranes

Valente

Miguel

Lobo

2002

European Polymer Journal

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Diffusion of aqueous sodium dodecyl sulfate (SDS) across cross-linked polyacrylamide hydrogel membranes has been studied by electrical conductivity measurements. Initial rapid sorption of SDS (as unimer) into the membranes is observed. The effect of SDS concentration, and of cross-linker fraction on the degree of swelling of the gels is studied and associated with binding of the surfactant to the polymer, with surface bound water suggested to be involved in these interactions. Below the surfactant critical micelle concentration, volume collapse of less cross-linked membranes is observed, and associated with aggregate formation. Fluorescence measurements using pyrene as a probe show that micellar aggregates do not diffuse through the membrane, and only overall unimer diffusion is observed. The effect of cross-linking on the diffusion process is discussed.

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Section: Discussionmentioning

confidence: 67%

“…This SDS behaviour is well established in charged gels [32][33][34]. In fact, the charged swollen polymer gels form stable complexes with oppositely charged surfactants [34,35]. The formation of such complexes results in aggregation of the surfactant ions at concentrations below the cmc in solution [36].…”

Section: Discussionmentioning

confidence: 75%

Diffusion coefficients of sodium dodecyl sulfate in water swollen cross-linked polyacrylamide membranes

Valente

Miguel

Lobo

2002

European Polymer Journal

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“…The extensive theoretical and experimental [138][139][140][141][142][143][144][145] studies have shown that the addition of anionic, cationic, and nonionic surfactants to the solution containing a gel can also influence the T V and swelling degree of hydrogels depending on their hydrophobicity and charge of the polymer network. In general, addition of anionic or cationic surfactant to the solution of nonionic hydrogel increases T V as well as the swelling range, whereas the nonionic surfactant does not affect T V or volume change.…”

Section: Surfactants As Effectors Of Hydrogel Volume Changementioning

confidence: 99%

Lipobeads

Казаков¹

2017

Liposomes

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A combination of lipid bilayer and cross-linked polymer network is the logical step in development of polymeric and liposomal nanoscopic systems to provide the natural level of functionality. From liposomal systems, lipobeads borrow the welldeveloped methods for preparation, diversity of lipids to control the properties of a lipid bilayer, biocompatibility of the lipid bilayer, possibility to vary size and morphology (passive targeting), availability of the external surface for attachment of various ligands (active targeting), encapsulation efficiency of both hydrophilic and hydrophobic molecules. Mechanical stability of the lipid bilayer and environmental responsiveness of the whole structure are the properties that hydrogel core brings to the new construct. The reports reviewed in this chapter demonstrate that lipobeads of nanometer and micrometer sizes can be prepared in different media, retain their stimuli responsiveness under physiological conditions, exhibit both reversible and irreversible aggregation, can be loaded with both small and high molecular weight molecules. As a platform for drug delivery systems, lipobeads have already been loaded with chemotherapeutics, malaria vaccine, and dermatological agent providing different controlled release profiles without leakage. Consecutive multistep triggering, new schemes of drug release, combined drug delivery, vesobeads, proteolipobeads, enzyme-containing lipobeads, and hemi-lipobeads are the directions for their future development.

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“…After immersion of polyelectrolyte gel in the solution of the oppositely charged surfactants due to exchange reaction and hydrophobic interactions the surfactants are concentrated and aggregated inside the gel phase; simultaneously, the gel collapses. [21][22][23][24][25] The practical aspects of the present research are connected with the design of new materials based on hydrogels possessing the combination of properties of the gel and feature dye.…”

Section: Introductionmentioning

confidence: 99%

Complexes of polyelectrolyte hydrogels with organic dyes: Effect of charge density on the complex stability and intragel dye aggregation

Jeon

Махаева

Khokhlov

1999

J. Polym. Sci. B Polym. Phys.

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Collapse of polyelectrolyte networks induced by their interaction with oppositely charged surfactants

Cited by 157 publications

References 3 publications

Diffusion coefficients of sodium dodecyl sulfate in water swollen cross-linked polyacrylamide membranes

Diffusion coefficients of sodium dodecyl sulfate in water swollen cross-linked polyacrylamide membranes

Lipobeads

Complexes of polyelectrolyte hydrogels with organic dyes: Effect of charge density on the complex stability and intragel dye aggregation

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