Polyelectrolytes Phase Behaviour in Multicomponent Mixtures, Composite Materials and Actuators

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Physics and Theory".

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 1887

Special Issue Editor


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Guest Editor
Adolphe Merkle Institute, Fribourg, Switzerland
Interests: biophysics; self-assembly; soft matter; bioinspired electricity; artificial muscles; chemical kinetics

Special Issue Information

Dear Colleagues,

Because of their physicochemical properties and their unique phase behaviour, polyelectrolytes play a key technological role. Unlike neutral polymers, the behaviour of polyelectrolytes is dominated by long-range charge interactions that can be tuned in range and strength by modifying the environmental conditions. These interactions are used, for instance, to stabilize industrial formulations and to assemble composite materials, while the responsiveness of polyelectrolytes to external cues makes them suitable candidates for the preparation of soft actuators and smart materials.

Although much is known about polyelectrolytes in solution, understanding their phase behaviour in multicomponent mixtures is crucial for the full exploitation of their unique properties. This Special Issue collects recent theoretical and experimental investigations as well as literature reviews aimed at understanding and applying the phase behaviour of polyelectrolytes in mixtures of polymers and colloids in both composite materials and soft actuators.

Dr. Alessandro Ianiro
Guest Editor

Manuscript Submission Information

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Keywords

  • polyelectrolytes
  • phase behaviour
  • stimuli-responsive polymers
  • smart materials
  • soft materials
  • composite materials

Published Papers (1 paper)

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Research

28 pages, 2473 KiB  
Article
Phase Behavior of Ion-Containing Polymers in Polar Solvents: Predictions from a Liquid-State Theory with Local Short-Range Interactions
by Yanwei Wang, Qiyuan Qiu, Arailym Yedilbayeva, Diana Kairula and Liang Dai
Polymers 2022, 14(20), 4421; https://doi.org/10.3390/polym14204421 - 19 Oct 2022
Viewed by 1576
Abstract
The thermodynamic phase behavior of charged polymers is a crucial property underlying their role in biology and various industrial applications. A complete understanding of the phase behaviors of such polymer solutions remains challenging due to the multi-component nature of the system and the [...] Read more.
The thermodynamic phase behavior of charged polymers is a crucial property underlying their role in biology and various industrial applications. A complete understanding of the phase behaviors of such polymer solutions remains challenging due to the multi-component nature of the system and the delicate interplay among various factors, including the translational entropy of each component, excluded volume interactions, chain connectivity, electrostatic interactions, and other specific interactions. In this work, the phase behavior of partially charged ion-containing polymers in polar solvents is studied by further developing a liquid-state (LS) theory with local shortrange interactions. This work is based on the LS theory developed for fully-charged polyelectrolyte solutions. Specific interactions between charged groups of the polymer and counterions, between neutral segments of the polymer, and between charged segments of the polymer are incorporated into the LS theory by an extra Helmholtz free energy from the perturbed-chain statistical associating fluid theory (PC-SAFT). The influence of the sequence structure of the partially charged polymer is modeled by the number of connections between bonded segments. The effects of chain length, charge fraction, counterion valency, and specific short-range interactions are explored. A computational App for salt-free polymer solutions is developed and presented, which allows easy computation of the binodal curve and critical point by specifying values for the relevant model parameters. Full article
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