Journal
ADVANCED COMPOSITES AND HYBRID MATERIALS
Volume 5, Issue 3, Pages 1769-1777Publisher
SPRINGERNATURE
DOI: 10.1007/s42114-022-00417-2
Keywords
PANI/epoxy composites; Mechanical property; Synergistic effect; Electromagnetic wave absorption
Funding
- Research Starting Foundation of Shaanxi University of Science and Technology [2019QNBJ-01]
- Research Foundation for Thousand Young Talent Plan of Shaanxi province of China
- National Natural Science Foundation of China [51972200, 51902192]
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In this study, polyaniline (PANI)/epoxy composites were reinforced with PANI-M to enhance their electromagnetic wave absorption performance and mechanical properties. The synergistic effect of PANI fillers with different geometries led to a significant improvement in reflection loss at high frequencies, as well as the mechanical properties. Characterization of the PANI fillers prepared by different methods revealed their structural and morphological properties, providing guidance for the preparation of advanced engineered epoxy nanocomposites.
In this work, the engineered polyaniline (PANI)/epoxy composites reinforced with PANI-M (physical mixture of PANI spheres and fibers) exhibit significantly enhanced electromagnetic wave absorption performance and mechanical property. Due to the synergistic effect of PANI fillers with different geometries, the reflection loss of 10.0 wt% PANI-M/epoxy could reach - 36.8 dB at 17.7 GHz. Meanwhile, the mechanical properties ( including tensile strength, toughness, and flexural strength) of PANI/epoxy were systematically studied. Compared with pure epoxy, the tensile strength of epoxy with 2.0 wt% PANI-M was improved to 86.2 MPa. Moreover, the PANI spheres (PANI-S) and PANI fibers (PANI-F) were prepared by the chemical oxidation polymerization method and interface polymerization method, respectively. The characterizations including scanning electron microscope, Fourier transform infrared spectra, and X-ray diffraction were applied to analyze the morphology and chemical and crystal structures of PANI filler. This work could provide the guideline for the preparation of advanced engineered epoxy nanocomposites for electromagnetic wave pollution treatment.
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