Changing the Anchor Density of a Swollen Polymer Brush at the Interface of Two Immiscible Liquids

Teppner, Renate; Motschmann, H.

doi:10.1021/ma9718053

Cited by 5 publications

(11 citation statements)

References 23 publications

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“…[41][42][43][44][45] There are several studies that investigate the behaviour of polymer brushes grafted not at any solid interface, but at a liquid-fluid or liquid-liquid interface. 2,8,[46][47][48] Very often these brushes are di-block co-polymer brushes, where the different blocks exhibit different affinities for the individual solvents. Such localization is important for controlling the properties of the liquid-fluid and liquid-liquid interfaces for a host of different applications.…”

Section: Polymer Brushes For Other Scenariosmentioning

confidence: 99%

Polyelectrolyte brushes: theory, modelling, synthesis and applications

et al. 2015

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Polyelectrolyte (PE) brushes are a special class of polymer brushes (PBs) containing charges. Polymer chains attain "brush"-like configuration when they are grafted or get localized at an interface (solid-fluid or liquid-fluid) with sufficiently close proximity between two-adjacent grafted polymer chains - such a proximity triggers a particular nature of interaction between the adjacent polymer molecules forcing them to stretch orthogonally to the grafting interface, instead of random-coil arrangement. In this review, we discuss the theory, synthesis, and applications of PE brushes. The theoretical discussion starts with the standard scaling concepts for polymer and PE brushes; following that, we shed light on the state of the art in continuum modelling approaches for polymer and PE brushes directed towards analysis beyond the scaling calculations. A special emphasis is laid in pinpointing the cases for which the PE electrostatic effects can be de-coupled from the PE entropic and excluded volume effects; such de-coupling is necessary to appropriately probe the complicated electrostatic effects arising from pH-dependent charging of the PE brushes and the use of these effects for driving liquid and ion transport at the interfaces covered with PE brushes. We also discuss the atomistic simulation approaches for polymer and PE brushes. Next we provide a detailed review of the existing approaches for the synthesis of polymer and PE brushes on interfaces, nanoparticles, and nanochannels, including mixed brushes and patterned brushes. Finally, we discuss some of the possible applications and future developments of polymer and PE brushes grafted on a variety of interfaces.

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Section: Polymer Brushes For Other Scenariosmentioning

confidence: 99%

Polyelectrolyte brushes: theory, modelling, synthesis and applications

et al. 2015

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“…An example is furnished by polystyrene-poly(vinylpyridine) (PS-PVP) diblocks in the selective solvent toluene, which is a bad solvent for the PVP block and promotes strong adsorption on a quartz substrate, but acts as a good solvent for the PS block and disfavors its adsorption on the substrate [11]. In a slight modification one uses diblock copolymers that are anchored at the liquid-air [12,13] or at a liquid-liquid interface of two immiscible liquids [14]. This scenario offers the advantage that the grafting density can (for the case of strongly anchored polymers) be varied by lateral compression (like a Langmuir mono-layer) and that the lateral surface pressure can be directly measured.…”

Section: Introductionmentioning

confidence: 99%

“…The understanding of grafted polymer systems progressed substantially with the advent of experimental techniques such as: surface-force-balance [8], small-angle-neutron scattering [9], neutron [11,25] and X-ray [26] diffraction, and ellipsometry [14]. Of equal merit was the advancement in the theoretical methodology ranging from field theoretical methods and scaling arguments to numerical simulations, which will be amply reviewed in this chapter.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Approaches to Neutral and Charged Polymer Brushes

Naji

Seidel

Netz

Advances in Polymer Science

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Neutral or charged polymers that are densely end-grafted to surfaces form brushlike structures and are highly stretched under good-solvent conditions. We discuss and compare relevant results from scaling models, self-consistent-field methods and MD simulation techniques and concentrate on the conceptual simple case of planar substrates. For neutral polymers the main quantity of interest is the brush height and the polymer density profile, which can be well predicted from self-consistent calculations and simulations. Charged polymers (polyelectrolytes) are of practical importance since they are soluble in water. Counterion degrees of freedom determine the brush behavior in a decisive way and lead to a strong and non-linear swelling of the brush.

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“…It is possible to acquire the adsorption behavior of polymer on the oil-water interface with technologies of ellipsometry, 12,13 neutron reection, 11 uorescence spectroscopy, [14][15][16] radiochemistry, 17,18 interfacial tensiometry 19,20 and so on. All of them, however, have their limitations.…”

Section: Introductionmentioning

confidence: 99%