Preparation and microwave absorbing properties of polyaniline-modified silicon carbide composites

Autor:	Jun Yan, Dandan Fu, Jihai Tang, Youqian Bai, Li Ma, Mengyu Gan, Sha Li, Zhitao Li
Rok vydání:	2013
Předmět:	Materials science Polymers and Plastics Dodecylbenzene Sodium Organic Chemistry Reflection loss chemistry.chemical_element Emulsion polymerization chemistry.chemical_compound Sulfonate chemistry Polyaniline Materials Chemistry Silicon carbide Ammonium persulfate Composite material
Zdroj:	High Performance Polymers. 25:901-906
ISSN:	1361-6412 0954-0083
Popis:	Polyaniline (PANI)/silicon carbide (SiC) composites were prepared by emulsion polymerization using sodium dodecylbenzene sulfonate and ammonium persulfate as emulsifier and oxidant, respectively. The structure and morphology of the composites were characterized by Fourier transform infrared (FTIR) spectroscopy, x-ray diffraction (XRD), and scanning electron microscopy (SEM). The FTIR and XRD results indicated that there existed an interaction between PANI molecules and SiC particles. The SEM results indicated that SiC particles were covered with the conducting PANI. Microwave absorbing properties were investigated by measuring complex permittivity and complex permeability at 26.5–40 GHz. The results showed that the reflection loss (RL) properties of PANI/SiC composites exhibited significant improvements compared with pure SiC. A maximum RL of −36.3 dB was observed at 38.6 GHz with a thickness of 0.9 mm for the composites and the effective absorption band under −10 dB reached 6.2 GHz.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::190900e90e7fb33a9f336a5666e4eaf4 https://doi.org/10.1177/0954008313487393 Zobrazit plný text záznamu