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Polymers
Special Issues
Magnetic Polymer Composites: Design and Application II
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Magnetic Polymer Composites: Design and Application II

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

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 2588

Special Issue Editor

Prof. Dr. Elena Kramarenko

E-Mail Website
Guest Editor
1. Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
2. A. N. Nesmeyanov Institute of Organoelement Compounds RAS, 119991 Moscow, Russia
Interests: statistical physics of macromolecules; computer simulations of polymers; rheology of polymer composites; magnetic polymer composites; magnetoactive elastomers; polyelectrolytes; polyelectrolyte gels; polyelectrolyte complexes; hyperbranched polymers; dendrimers
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues, 

Magnetic polymer composites (MPCs), combining properties of polymers and magnetic materials, have been known for a long time and have actively been used in various applications. Nowadays, they are experiencing a renewed interest due to the appearance of a new generation of smart MPCs based on soft polymer matrices filled with magnetic nano- and/or microparticles, demonstrating a wide range of responsive properties in applied magnetic fields, the most studied of which are magnetorheological, magnetodeformational, and magnetodielectric features.

This Special Issue intends to highlight recent advances concerning all aspects of MPC responsive properties based on magnetomechanical coupling, progress in the modelling and simulation of material behavior at various scale levels, as well as possible novel applications. It is particularly focused on MPC compositions, e.g., (i) new architectures of polymer matrices, (ii) the effects of magnetic particles’ shape, and (iii) specifically designed magnetic filler arrangements which facilitate the development of magneto–polymer materials that exhibit novel architectures and functions. In addition to magnetoactive elastomers including smart membranes, thin films, and coatings, this Special Issue may also address magnetic foams and magnetic fluids based on polymeric dispersion media, as well as magnetic gels that are promising for medical applications. Both original contributions and reviews are welcome.

Prof. Dr. Elena Kramarenko
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • magnetoactive elastomers
  • magnetorheological elastomers
  • magnetic fluids
  • magnetic foams
  • magnetic gels
  • magnetic particles
  • magnetorheological effect
  • magnetodielectric effect
  • shape memory
  • magnetomechanical coupling

Published Papers (3 papers)

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Research

17 pages, 3738 KiB  
Article
Transient Response of Macroscopic Deformation of Magnetoactive Elastomeric Cylinders in Uniform Magnetic Fields
by Gašper Glavan, Inna A. Belyaeva and Mikhail Shamonin
Polymers 2024, 16(5), 586; https://0-doi-org.brum.beds.ac.uk/10.3390/polym16050586 - 21 Feb 2024
Viewed by 512
Abstract
Significant deformations of bodies made from compliant magnetoactive elastomers (MAE) in magnetic fields make these materials promising for applications in magnetically controlled actuators for soft robotics. Reported experimental research in this context was devoted to the behaviour in the quasi-static magnetic field, but [...] Read more.
Significant deformations of bodies made from compliant magnetoactive elastomers (MAE) in magnetic fields make these materials promising for applications in magnetically controlled actuators for soft robotics. Reported experimental research in this context was devoted to the behaviour in the quasi-static magnetic field, but the transient dynamics are of great practical importance. This paper presents an experimental study of the transient response of apparent longitudinal and transverse strains of a family of isotropic and anisotropic MAE cylinders with six different aspect ratios in time-varying uniform magnetic fields. The time dependence of the magnetic field has a trapezoidal form, where the rate of both legs is varied between 52 and 757 kA/(s·m) and the maximum magnetic field takes three values between 153 and 505 kA/m. It is proposed to introduce four characteristic times: two for the delay of the transient response during increasing and decreasing magnetic field, as well as two for rise and fall times. To facilitate the comparison between different magnetic field rates, these characteristic times are further normalized on the rise time of the magnetic field ramp. The dependence of the normalized characteristic times on the aspect ratio, the magnetic field slew rate, maximum magnetic field values, initial internal structure (isotropic versus anisotropic specimens) and weight fraction of the soft-magnetic filler are obtained and discussed in detail. The normalized magnetostrictive hysteresis loop is introduced, and used to explain why the normalized delay times vary with changing experimental parameters. Full article
(This article belongs to the Special Issue Magnetic Polymer Composites: Design and Application II)
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14 pages, 3393 KiB  
Article
Programming and Reprogramming the Viscoelasticity and Magnetic Response of Magnetoactive Thermoplastic Elastomers
by Sergei A. Kostrov, Josiah H. Marshall, Mitchell Maw, Sergei S. Sheiko and Elena Yu. Kramarenko
Polymers 2023, 15(23), 4607; https://0-doi-org.brum.beds.ac.uk/10.3390/polym15234607 - 03 Dec 2023
Cited by 1 | Viewed by 756
Abstract
We present a novel type of magnetorheological material that allows one to restructure the magnetic particles inside the finished composite, tuning in situ the viscoelasticity and magnetic response of the material in a wide range using temperature and an applied magnetic field. The [...] Read more.
We present a novel type of magnetorheological material that allows one to restructure the magnetic particles inside the finished composite, tuning in situ the viscoelasticity and magnetic response of the material in a wide range using temperature and an applied magnetic field. The polymer medium is an A-g-B bottlebrush graft copolymer with side chains of two types: polydimethylsiloxane and polystyrene. At room temperature, the brush-like architecture provides the tissue mimetic softness and strain stiffening of the elastomeric matrix, which is formed through the aggregation of polystyrene side chains into aggregates that play the role of physical cross-links. The aggregates partially dissociate and the matrix softens at elevated temperatures, allowing for the effective rearrangement of magnetic particles by applying a magnetic field in the desired direction. Magnetoactive thermoplastic elastomers (MATEs) based on A-g-B bottlebrush graft copolymers with different amounts of aggregating side chains filled with different amounts of carbonyl iron microparticles were prepared. The in situ restructuring of magnetic particles in MATEs was shown to significantly alter their viscoelasticity and magnetic response. In particular, the induced anisotropy led to an order-of-magnitude enhancement of the magnetorheological properties of the composites. Full article
(This article belongs to the Special Issue Magnetic Polymer Composites: Design and Application II)
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18 pages, 5496 KiB  
Article
Effect of Polydispersity on the Structural and Magnetic Properties of a Magnetopolymer Composite
by Dmitry I. Radushnov, Anna Yu. Solovyova and Ekaterina A. Elfimova
Polymers 2023, 15(12), 2678; https://0-doi-org.brum.beds.ac.uk/10.3390/polym15122678 - 14 Jun 2023
Cited by 1 | Viewed by 900
Abstract
When using magnetopolymer composites in high-precision industrial and biomedical technologies, the problem of predicting their properties in an external magnetic field arises. In this work, we study theoretically the influence of the polydispersity of a magnetic filler on a composite’s equilibrium magnetization and [...] Read more.
When using magnetopolymer composites in high-precision industrial and biomedical technologies, the problem of predicting their properties in an external magnetic field arises. In this work, we study theoretically the influence of the polydispersity of a magnetic filler on a composite’s equilibrium magnetization and on the orientational texturing of magnetic particles formed during polymerization. The results are obtained using rigorous methods of statistical mechanics and Monte Carlo computer simulations in the framework the bidisperse approximation. It is shown that by adjusting the dispersione composition of the magnetic filler and the intensity of the magnetic field at which the sample’s polymerization occurs, it is possible to control the composite’s structure and magnetization. The derived analytical expressions determine these regularities. The developed theory takes into account dipole–dipole interparticle interactions and therefore can be applied to predict the properties of concentrated composites. The obtained results are a theoretical basis for the synthesis of magnetopolymer composites with a predetermined structure and magnetic properties. Full article
(This article belongs to the Special Issue Magnetic Polymer Composites: Design and Application II)
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