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Polymers
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Magnetic Polymer Materials
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Magnetic Polymer Materials

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

Deadline for manuscript submissions: 25 August 2024 | Viewed by 6531

Special Issue Editors

Dr. Dayong Qiao

E-Mail Website
Guest Editor
1. Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education, Northwestern Polytechnical University, Xi’an 710072, China
2. Shaanxi Province Key Laboratory of Micro and Nano Electro-Mechanical Systems, Northwestern Polytechnical University, Xi’an 710072, China
3. Ningbo Institute of Northwestern Polytechnical University, Ningbo 315103, China
Interests: optical mems; micro/nano fabrication; power mems; magnetic polymers; magnetic particles; polymer matrix; manufacture process; 3D printing
Dr. Shudong Wang

E-Mail Website
Co-Guest Editor
School of Electrical Engineering, Xi'an Jiaotong University, Xi’an 710072, China
Interests: MEMS acoustic sensing; photoacoustic MEMS gas sensing; integration of MEMS sensors
Dr. Ruirong Zhang

E-Mail Website
Co-Guest Editor
School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
Interests: energy storage materials; flexible energy storage devices

Special Issue Information

Dear Colleagues, 

Magnetic polymers are defined as functional polymers with magnetic properties and are used extensively in diversified applications. The purpose of this Special Issue “Magnetic Polymer Materials” is to present papers representing the multidisciplinary research of chemists, materials scientists, and physicists. We envisage that this Special Issue will comprise three collections each representing a particular aspect of the overall theme. Part one will focus on new materials with unusual properties that could lead to exciting new applications or improved performances. Part two will focus on the developments in manufacturing processes toward realizing complex geometries with magnetic polymers, including but not limited to 3D printing. Part three will focus on the demonstration of applications where magnetic polymer materials are more likely to be compatible than their cast or sintered magnet counterparts.

Dr. Dayong Qiao
Dr. Shudong Wang
Dr. Ruirong Zhang
Guest Editors

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

  • magnetic polymers
  • magnetic particles
  • polymer matrix
  • manufacture process
  • 3D printing

Published Papers (6 papers)

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Research

13 pages, 2788 KiB  
Article
Low-Frequency Resonant Magnetoelectric Effect in a Piezopolymer-Magnetoactive Elastomer Layered Structure at Different Magnetization Geometries
by Dmitrii V. Savelev, Dmitri A. Burdin, Leonid Y. Fetisov, Yuri K. Fetisov, Nikolai S. Perov and Liudmila A. Makarova
Polymers 2024, 16(7), 928; https://doi.org/10.3390/polym16070928 - 28 Mar 2024
Viewed by 457
Abstract
The search for novel materials with enhanced characteristics for the advancement of flexible electronic devices and energy harvesting devices is currently a significant concern. Multiferroics are a prominent example of energy conversion materials. The magnetoelectric conversion in a flexible composite based on a [...] Read more.
The search for novel materials with enhanced characteristics for the advancement of flexible electronic devices and energy harvesting devices is currently a significant concern. Multiferroics are a prominent example of energy conversion materials. The magnetoelectric conversion in a flexible composite based on a piezopolymer layer and a magnetic elastomer layer was investigated. The study focused on investigating the dynamic magnetoelectric effect in various configurations of external alternating and constant homogeneous magnetic fields (L-T and T-T configurations). The T-T geometry exhibited a two orders of magnitude higher coefficient of the magnetoelectric effect compared to the L-T geometry. Mechanisms of structure bending in both geometries were proposed and discussed. A theory was put forward to explain the change in the resonance frequency in a uniform external field. A giant value of frequency tuning in a magnetic field of up to 362% was demonstrated; one of the highest values of the magnetoelectric effect yet recorded in polymer multiferroics was observed, reaching up to 134.3 V/(Oe∙cm). Full article
(This article belongs to the Special Issue Magnetic Polymer Materials)
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27 pages, 6886 KiB  
Article
Effects of Filler Anisometry on the Mechanical Response of a Magnetoactive Elastomer Cell: A Single-Inclusion Modeling Approach
by Timur A. Nadzharyan and Elena Yu. Kramarenko
Polymers 2024, 16(1), 118; https://doi.org/10.3390/polym16010118 - 29 Dec 2023
Viewed by 505
Abstract
A finite-element model of the mechanical response of a magnetoactive elastomer (MAE) volume element is presented. Unit cells containing a single ferromagnetic inclusion with geometric and magnetic anisotropy are considered. The equilibrium state of the cell is calculated using the finite-element method and [...] Read more.
A finite-element model of the mechanical response of a magnetoactive elastomer (MAE) volume element is presented. Unit cells containing a single ferromagnetic inclusion with geometric and magnetic anisotropy are considered. The equilibrium state of the cell is calculated using the finite-element method and cell energy minimization. The response of the cell to three different excitation modes is studied: inclusion rotation, inclusion translation, and uniaxial cell stress. The influence of the magnetic properties of the filler particles on the equilibrium state of the MAE cell is considered. The dependence of the mechanical response of the cell on the filler concentration and inclusion anisometry is calculated and analyzed. Optimal filler shapes for maximizing the magnetic response of the MAE are discussed. Full article
(This article belongs to the Special Issue Magnetic Polymer Materials)
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15 pages, 4084 KiB  
Article
Magnetic and Viscoelastic Response of Magnetorheological Elastomers Based on a Combination of Iron Nano- and Microparticles
by Imperio Anel Perales-Martínez, Luis Manuel Palacios-Pineda, Alex Elías-Zúñiga, Daniel Olvera-Trejo, Karina Del Ángel-Sánchez, Isidro Cruz-Cruz, Claudia Angélica Ramírez-Herrera and Oscar Martínez-Romero
Polymers 2023, 15(18), 3703; https://doi.org/10.3390/polym15183703 - 08 Sep 2023
Viewed by 896
Abstract
In this paper, we discuss the creation of a hybrid magnetorheological elastomer that combines nano- and microparticles. The mixture contained 45 wt.% fillers, with combinations of either 0% nanoparticles and 100% microparticles or 25% nanoparticles and 75% microparticles. TGA and FTIR testing confirmed [...] Read more.
In this paper, we discuss the creation of a hybrid magnetorheological elastomer that combines nano- and microparticles. The mixture contained 45 wt.% fillers, with combinations of either 0% nanoparticles and 100% microparticles or 25% nanoparticles and 75% microparticles. TGA and FTIR testing confirmed the materials’ thermal and chemical stability, while an SEM analysis determined the particles’ size and morphology. XRD results were used to determine the crystal size of both nano- and microparticles. The addition of reinforcing particles, particularly nanoparticles, enhanced the stiffness of the composite materials studied, but their overall strength was only minimally affected. The computed interaction parameter relative to the volume fraction was consistent with the previous literature. Furthermore, the study observed a magnetic response increment in composite materials reinforced with nanoparticles above 30 Hz. The isotropic material containing only microparticles had a lower storage modulus than the isotropic sample with nanoparticles without a magnetic field. However, when a magnetic field was applied, the material with only microparticles exhibited a higher storage modulus than the samples with nanoparticles. Full article
(This article belongs to the Special Issue Magnetic Polymer Materials)
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16 pages, 9766 KiB  
Article
Magnetic Filler Polymer Composites—Morphology Characterization and Experimental and Stochastic Finite Element Analyses of Mechanical Properties
by Yingnan Wang, Hamidreza Ahmadi Moghaddam, Jorge Palacios Moreno and Pierre Mertiny
Polymers 2023, 15(13), 2897; https://doi.org/10.3390/polym15132897 - 30 Jun 2023
Viewed by 1008
Abstract
Polymer composites containing magnetic fillers are promising materials for a variety of applications, such as in energy storage and medical fields. To facilitate the engineering design of respective components, a comprehensive understanding of the mechanical behavior of such inhomogeneous and potentially highly anisotropic [...] Read more.
Polymer composites containing magnetic fillers are promising materials for a variety of applications, such as in energy storage and medical fields. To facilitate the engineering design of respective components, a comprehensive understanding of the mechanical behavior of such inhomogeneous and potentially highly anisotropic materials is important. Therefore, the authors created magnetic composites by compression molding. The epoxy polymer matrix was modified with a commercial-grade thickening agent. Isotropic magnetic particles were added as the functional filler. The microstructural morphology, especially the filler distribution, dispersion, and alignment, was characterized using microscopy techniques. The mechanical properties of the composites were experimentally characterized and studied by stochastic finite element analysis (SFEA). Modeling was conducted employing four cases to predict the elastic modulus: fully random distribution, randomly aligned distribution, a so-called “rough” interface contact, and a bonded interface contact. Results from experiments and SFEA modeling were compared and discussed. Full article
(This article belongs to the Special Issue Magnetic Polymer Materials)
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18 pages, 3142 KiB  
Article
Sargassum@magnetite Composite EDTA-Functionalized for the Potential Removal of Mercury
by Diana Issell Sandoval-Cárdenas, Hector Pool, Sarai E. Favela-Camacho, José Santos-Cruz, Juan Campos-Guillén, Miguel Angel Ramos-López, Eloy Rodríguez-deLeón, Jessica Viridiana Urbina-Arroyo and Aldo Amaro-Reyes
Polymers 2023, 15(6), 1405; https://doi.org/10.3390/polym15061405 - 11 Mar 2023
Cited by 2 | Viewed by 1158
Abstract
Sargassum spp. affects the Caribbean shores; thus, its remotion or valorization is a priority. This work aimed to synthesize a low-cost magnetically retrievable Hg+2 adsorbent functionalized with ethylenediaminetetraacetic acid (EDTA) based on Sargassum. The Sargassum was solubilized to synthesize by co-precipitation [...] Read more.
Sargassum spp. affects the Caribbean shores; thus, its remotion or valorization is a priority. This work aimed to synthesize a low-cost magnetically retrievable Hg+2 adsorbent functionalized with ethylenediaminetetraacetic acid (EDTA) based on Sargassum. The Sargassum was solubilized to synthesize by co-precipitation a magnetic composite. A central composite design was assessed to maximize the adsorption of Hg+2. The solids yield magnetically attracted mass, and the saturation magnetizations of the functionalized composite were 60.1 ± 17.2%, 75.9 ± 6.6%, and 1.4 emu g−1. The functionalized magnetic composite yielded 29.8 ± 0.75 mg Hg+2 g−1 of chemisorption after 12 h, pH 5, and 25 °C achieving 75% Hg+2 adsorption after four reuse cycles. Crosslinking and functionalization with Fe3O4 and EDTA created differences in surface roughness as well as the thermal events of the composites. The Fe3O4@Sargassum@EDTA composite was a magnetically recovered biosorbent of Hg2+. Full article
(This article belongs to the Special Issue Magnetic Polymer Materials)
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14 pages, 3843 KiB  
Article
Development of an Fe3O4 Surface-Grafted Carboxymethyl Chitosan Molecularly Imprinted Polymer for Specific Recognition and Sustained Release of Salidroside
by Xingbin Ma, Shuyu Li, Jiajie Qiu, Zijie Liu, Siyu Liu, Zhifeng Huang, Yanhong Yong, Youquan Li, Zhichao Yu, Xiaoxi Liu, Hongling Lin, Xianghong Ju and A. M. Abd El-Aty
Polymers 2023, 15(5), 1187; https://doi.org/10.3390/polym15051187 - 27 Feb 2023
Cited by 3 | Viewed by 1739
Abstract
The choice of carrier material is critical in the study of natural drug release preparations and glycosylated magnetic molecularly imprinted materials. The stiffness and softness of the carrier material affect the efficiency of drug release and the specificity of recognition. The dual adjustable [...] Read more.
The choice of carrier material is critical in the study of natural drug release preparations and glycosylated magnetic molecularly imprinted materials. The stiffness and softness of the carrier material affect the efficiency of drug release and the specificity of recognition. The dual adjustable aperture-ligand in molecularly imprinted polymers (MIPs) provides the possibility of individualized design for sustained release studies. In this study, a combination of paramagnetic Fe3O4 and carboxymethyl chitosan (CC) was used to enhance the imprinting effect and improve drug delivery. A combination of tetrahydrofuran and ethylene glycol was used as a binary porogen to prepare MIP-doped Fe3O4-grafted CC (SMCMIP). Salidroside serves as the template, methacrylic acid acts as the functional monomer, and ethylene glycol dimethacrylate (EGDMA) serves as the crosslinker. Scanning and transmission electron microscopy were used to observe the micromorphology of the microspheres. The structural and morphological parameters of the SMCMIP composites were measured, including the surface area and pore diameter distribution. In an in vitro study, we found that the SMCMIP composite had a sustained release property of 50% after 6 h of release time in comparison to the control SMCNIP. The total amounts of SMCMIP released at 25 °C and 37 °C were 77% and 86%, respectively. In vitro results showed that the release of SMCMIP followed Fickian kinetics, meaning that the rate of release is dependent on the concentration gradient, with diffusion coefficients ranging from 3.07 × 10−2 cm2/s to 5.66 × 10−3 cm2/s. The results of cytotoxicity experiments showed that the SMCMIP composite did not have any harmful effects on cell growth. The survival rates of intestinal epithelial cells (IPEC-J2) were found to be above 98%. By using the SMCMIP composite, drugs may be delivered in a sustained manner, potentially leading to improved therapeutic outcomes and reduced side effects. Full article
(This article belongs to the Special Issue Magnetic Polymer Materials)
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