{"title":"Magnetic magnetite/epoxy nanocomposites with polyaniline as coupling agent: preparation, characterization, and property","authors":"Juanna Ren, Wenhao Dong, Ethan Burcar, Ashley DeMerle, Zhe Wang, Hua Hou","doi":"10.1007/s42114-024-01166-0","DOIUrl":null,"url":null,"abstract":"<div><p>An in situ polymerization method fabricated the electrically conductive magnetic epoxy nanocomposites with magnetite@polyaniline. With the introduction of polyaniline on the magnetite nanoparticles, the structural integrity of the synthesized epoxy nanocomposites was enhanced with the bridging effect of the polyaniline. Specifically, compared with pure epoxy, the tensile strength was improved to 82.2 MPa when 1.0 wt% magnetite@polyaniline was added to the epoxy matrix. The enhanced mechanical property is due to the enhanced interfacial interaction. With further increasing particle loading to 30.0 wt%, glass transition temperature (<i>T</i><sub>g</sub>) was decreased to 85.4 °C, which is related to the enlarged free volume between epoxy chains. The saturation magnetization of 30.0 wt% magnetite@polyaniline/epoxy composites was 12.79 emu/g. Moreover, with the assistance of magnetite@polyaniline, the thermal stability was enhanced compared with pure epoxy. The electromagnetic wave absorption of the unique magnetite@polyaniline/epoxy nanocomposites was also studied. When the content of magnetite@polyaniline reached 30.0 wt%, the reflection loss even reached − 35.9 dB. This work guides the fabrication of multifunctional epoxy nanocomposites with comprehensive electrical, magnetic, and mechanical properties.</p><h3>Graphical abstract</h3><p>Magnetite epoxy nanocomposites with polyaniline as coupling agent with enhanced electromagnetic wave absorption performance</p>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":"8 1","pages":""},"PeriodicalIF":23.2000,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42114-024-01166-0.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Composites and Hybrid Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s42114-024-01166-0","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, COMPOSITES","Score":null,"Total":0}
引用次数: 0
Abstract
An in situ polymerization method fabricated the electrically conductive magnetic epoxy nanocomposites with magnetite@polyaniline. With the introduction of polyaniline on the magnetite nanoparticles, the structural integrity of the synthesized epoxy nanocomposites was enhanced with the bridging effect of the polyaniline. Specifically, compared with pure epoxy, the tensile strength was improved to 82.2 MPa when 1.0 wt% magnetite@polyaniline was added to the epoxy matrix. The enhanced mechanical property is due to the enhanced interfacial interaction. With further increasing particle loading to 30.0 wt%, glass transition temperature (Tg) was decreased to 85.4 °C, which is related to the enlarged free volume between epoxy chains. The saturation magnetization of 30.0 wt% magnetite@polyaniline/epoxy composites was 12.79 emu/g. Moreover, with the assistance of magnetite@polyaniline, the thermal stability was enhanced compared with pure epoxy. The electromagnetic wave absorption of the unique magnetite@polyaniline/epoxy nanocomposites was also studied. When the content of magnetite@polyaniline reached 30.0 wt%, the reflection loss even reached − 35.9 dB. This work guides the fabrication of multifunctional epoxy nanocomposites with comprehensive electrical, magnetic, and mechanical properties.
Graphical abstract
Magnetite epoxy nanocomposites with polyaniline as coupling agent with enhanced electromagnetic wave absorption performance
期刊介绍：
Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field.
The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest.
Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials.
Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.
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