Impact mechanisms of aggregation state regulation strategies on the microwave absorption properties of flexible polyaniline

Di Lan; Yue Wang; Youyong Wang; Xiufang Zhu; Haifeng Li; Xiaoming Guo; Juanna Ren; Zhanhu Guo; Guanglei Wu

doi:10.1016/j.jcis.2023.08.019

Impact mechanisms of aggregation state regulation strategies on the microwave absorption properties of flexible polyaniline

J Colloid Interface Sci. 2023 Dec:651:494-503. doi: 10.1016/j.jcis.2023.08.019. Epub 2023 Aug 6.

Authors

Di Lan¹, Yue Wang², Youyong Wang¹, Xiufang Zhu¹, Haifeng Li¹, Xiaoming Guo¹, Juanna Ren³, Zhanhu Guo⁴, Guanglei Wu⁵

Affiliations

¹ School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, PR China.
² School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, PR China. Electronic address: 20200047@huat.edu.cn.
³ College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, PR China; Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne NE1 8ST, UK.
⁴ Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne NE1 8ST, UK.
⁵ Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education School of Electrical & Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, PR China; Institute of Materials for Energy and Environment, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China. Electronic address: wuguanglei@qdu.edu.cn.

PMID: 37556906
DOI: 10.1016/j.jcis.2023.08.019

Abstract

In the field of electromagnetic (EM) wave absorption, intrinsic conductive polymers with conjugated long-chain structures, such as polyaniline (PANI) and polypyrrole (PPy), have gained widespread use due to their remarkable electrical conductivity and loss ability. However, current research in this area is limited to macroscopic descriptions of the absorption properties of these materials and the contribution of various components to the absorption effect. There has been insufficient exploration of the impact mechanisms of polymer aggregation states on the material's absorption performance and mechanism. To address this, a series of flexible PANI sponge absorbers with different molecular weights and aggregation states were prepared. By carefully controlling the crystallinity and other aggregation characteristics of PANI through the adjustment of its preparation conditions, we were able to influence its electrical conductivity and electromagnetic parameters, thereby achieving control over the material's absorption properties. The resulting PANI sponge absorbers exhibited an effective absorption bandwidth (EAB) that covered the entire X-band at a thickness of 3.2 mm. This study comprehensively explores the absorption mechanisms of conductive polymer absorbers, starting from the microstructure of PANI, and providing a more complete theoretical support for the research and promotion of polymer absorbers.

Keywords: Absorption mechanism of EM wave; Conductive mechanism; Conductive polymeric material; Polymer sponge.