一步法制备三维杆状聚吡咯及其吸波性能研究

doi:10.11896/cldb.24010018

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Abstract This study addresses the issues of monotonous microscopic morphology and impedance mismatch inherent in traditional polypyrrole microwave absorption materials. Four distinct microstructures of polypyrrole (PPy-X) were fabricated by manipulating the polymerization conditions and employing a one-step synthesis approach. Subsequently, their dielectric parameters were assessed using the coaxial method, enabling subsequent calculation of their microwave absorption performance. The research findings reveal that polypyrrole prepared with MnO₂ as the oxidant and methyl orange as the surfactant (PPy-C) exhibits optimal microwave absorption performance. The optimum reflection loss at a sample thickness of 2.5 mm reaches -28.97 dB (11.20 GHz), and the effective absorption bandwidth (EAB) extends to 4.32 GHz (6.88—11.2 GHz) at 3 mm. The exceptional absorption characteristics of PPy-C stem from impedance matching and polarization loss. Its favorable impedance matching properties are attributed to the utilization of MnO₂ as the oxidant and methyl orange as the surfactant in the oxidation process. The pola-rization loss of PPy-C arises from two primary aspects: the introduction of dipoles through methyl orange doping, resulting in dipole polarization; the synergistic effect of multiple interfaces between the three-dimensional rod-like structure of PPy-C and the nanoscale particles enhances the material′s interface polarization. The microstructure modulation strategy employed for polypyrrole proficiently fine-tunes the loss mechanisms of electromagnetic waves within the material, leading to superior microwave absorption performance.

Key words： polypyrrole morphology control microwave absorption performance dielectric loss

Published: 25 April 2025 Online: 2025-04-18

CLC number:

TB34

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	Articles by authors
	CHENG Yajie
	XU Zichen
	WANG Qiang
	WEI Hao
	SUN Xiping
	WANG Lin

Cite this article:

CHENG Yajie,XU Zichen,WANG Qiang, et al. One-step Synthesis of Three-dimensional Rod-like Polypyrrole and Investigation for Microwave Absorption Performance[J]. Materials Reports, 2025, 39(8): 24010018-6.

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https://www.mater-rep.com/EN/10.11896/cldb.24010018 OR https://www.mater-rep.com/EN/Y2025/V39/I8/24010018

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