Realizing balanced flame retardancy and electromagnetic interference shielding in hierarchical elastomer nanocomposites

Kexin Chen; Hengrui Wang; Yongqian Shi; Miao Liu; Yuezhan Feng; Libi Fu; Pingan Song

doi:10.1016/j.jcis.2023.09.112

Realizing balanced flame retardancy and electromagnetic interference shielding in hierarchical elastomer nanocomposites

J Colloid Interface Sci. 2024 Jan;653(Pt A):634-642. doi: 10.1016/j.jcis.2023.09.112. Epub 2023 Sep 19.

Authors

Kexin Chen¹, Hengrui Wang¹, Yongqian Shi², Miao Liu¹, Yuezhan Feng³, Libi Fu⁴, Pingan Song⁵

Affiliations

¹ College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, China.
² College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, China. Electronic address: shiyq1986@fzu.edu.cn.
³ Key Laboratory of Materials Processing and Mold Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China.
⁴ College of Civil Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, China.
⁵ Centre for Future Materials, University of Southern Queensland, Springfield, QLD 4300, Australia; School of Agriculture and Environmental Science, University of Southern Queensland, Springfield, QLD 4300, Australia. Electronic address: pingan.song@usq.edu.au.

PMID: 37738936
DOI: 10.1016/j.jcis.2023.09.112

Abstract

The combination of electromagnetic interference (EMI) shielding performance and flame-retardant property is essential for applications in the field of electronics and electrics. To date, there have been few successful cases in achieving such portfolios, due to the different mechanisms and even mutual exclusivity of these two attributes. Herein, an ammonium polyphosphate@chitosan@carbon nanotube (APP@CS@MWCNT) core-multishell hybrid was synthesized by microencapsulation technology. Then, the hybrid was introduced into TPU matrix to fabricate TPU composites, acting as surface layer. Meanwhile, MXene film was used as intermediate layer to construct hierarchical TPU composites. The obtained results showed that after introduction of 1 wt% APP@CS@MWCNT hybrid, the peak of heat release rate (PHRR) and the peak of smoke produce rate (PSPR) of TPU composites decreased by 67.4% and 35.6%, respectively, compared with those of pure TPU. Owing to multiple reflection losses, interface polarization losses, and charge carrier movement-induced thermal dissipation, TPU/15AC@4M-SW exhibited the highest EMI shielding performance, and obtained shielding effectiveness values of 35.7 dB and 38.9 dB in X band and K band, respectively.

Keywords: Electromagnetic interference shielding; Flame retardancy; Hierarchical structure; MXene; Thermoplastic polyurethane.