PANI/BaFe12O19@Halloysite ternary composites as novel microwave absorbent

Zihao Chen; Dawei Mu; Tianhao Liu; Zilong He; Yi Zhang; Huaming Yang; Jing Ouyang

doi:10.1016/j.jcis.2020.08.006

PANI/BaFe₁₂O₁₉@Halloysite ternary composites as novel microwave absorbent

J Colloid Interface Sci. 2021 Jan 15;582(Pt A):137-148. doi: 10.1016/j.jcis.2020.08.006. Epub 2020 Aug 6.

Authors

Zihao Chen¹, Dawei Mu¹, Tianhao Liu¹, Zilong He¹, Yi Zhang¹, Huaming Yang¹, Jing Ouyang²

Affiliations

¹ Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China; Key Laboratory for Mineral Materials and Application of Hunan Province, Central South University, Changsha, Hunan 410083, China; Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Central South University, Changsha, Hunan 410083, China.
² Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China; Key Laboratory for Mineral Materials and Application of Hunan Province, Central South University, Changsha, Hunan 410083, China; Key Lab of Clay Mineral Functional Materials in China Building Materials Industry, Central South University, Changsha, Hunan 410083, China. Electronic address: jingouyang@csu.edu.cn.

PMID: 32818711
DOI: 10.1016/j.jcis.2020.08.006

Abstract

A three-phase PANI/BaFe₁₂O₁₉@Hal heterostructure was designed and fabricated in this paper as efficient lightweight electromagnetic wave absorbing material through the combination of citrate assisted sol-gel self-propagating combustion and in-situ oxidative polymerization of aniline. In addition, the effects of the weight ratio of different PANI to BF@Hal on the microwave absorption properties of the materials were studied. The results show that when the weight ratio of PANI is 40%, the material has the best microwave absorption performance. The frequency bandwidth below -5 dB reached 9.60 GHz and the minimum absorption peak at 11.92 GHz was -14.77 dB. The combination of the PANI and BF@Hal nanosheets take advantage of the interfacial polarization, natural resonance, dielectric polarization and trapping of EM waves by internal reflection in PANI/BaFe₁₂O₁₉@Hal. Taking advantage of the unique microscopic morphology and interface characteristics, halloysite was introduced to improve the microwave absorption performance and enrich the absorbing mechanism of the composite materials. This work may provide a reliable candidate for the synthesis of electromagnetic attenuation materials with fairly good performances.

Keywords: Barium ferrite; Halloysite; Magnetism; Microwave absorbing property; Polyaniline.