Magnetic magnetite/epoxy nanocomposites with polyaniline as coupling agent: preparation, characterization, and property

IF 23.2 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Advanced Composites and Hybrid Materials Pub Date : 2024-12-27 DOI:10.1007/s42114-024-01166-0

Juanna Ren, Wenhao Dong, Ethan Burcar, Ashley DeMerle, Zhe Wang, Hua Hou

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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 (T_g) 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

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以聚苯胺为偶联剂的磁性磁铁矿/环氧纳米复合材料：制备、表征及性能

采用原位聚合法制备了含有magnetite@polyaniline的导电磁性环氧纳米复合材料。在磁性纳米颗粒上加入聚苯胺，聚苯胺的桥接作用增强了环氧纳米复合材料的结构完整性。其中，与纯环氧树脂相比，当环氧树脂基体中添加1.0 wt% magnetite@polyaniline时，抗拉强度提高到82.2 MPa。力学性能的增强是由于界面相互作用的增强。当颗粒负载进一步增加到30.0 wt%时，玻璃化转变温度（Tg）降至85.4℃，这与环氧链之间的自由体积增大有关。30.0 wt% magnetite@polyaniline/环氧复合材料的饱和磁化强度为12.79 emu/g。此外，在magnetite@polyaniline的帮助下，与纯环氧树脂相比，热稳定性得到了提高。研究了独特的magnetite@polyaniline/环氧纳米复合材料对电磁波的吸收。当magnetite@polyaniline的含量达到30.0 wt%时，反射损耗达到−35.9 dB。这项工作指导了多功能环氧纳米复合材料的制造，具有综合的电、磁和机械性能。以聚苯胺为偶联剂的磁性环氧纳米复合材料具有增强的电磁波吸收性能

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来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

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.