Architecting fire safe hierarchical polymer nanocomposite films with excellent electromagnetic interference shielding via interface engineering

Yongqian Shi; Ansheng Yao; Junqiang Han; Hengrui Wang; Yuezhan Feng; Libi Fu; Fuqiang Yang; Pingan Song

doi:10.1016/j.jcis.2023.02.085

Architecting fire safe hierarchical polymer nanocomposite films with excellent electromagnetic interference shielding via interface engineering

J Colloid Interface Sci. 2023 Jun 15:640:179-191. doi: 10.1016/j.jcis.2023.02.085. Epub 2023 Feb 24.

Authors

Yongqian Shi¹, Ansheng Yao², Junqiang Han², Hengrui Wang², Yuezhan Feng³, Libi Fu⁴, Fuqiang Yang², Pingan Song⁵

Affiliations

¹ College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, PR China. Electronic address: shiyq1986@fzu.edu.cn.
² College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, PR China.
³ Key Laboratory of Materials Processing and Mold Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, PR China.
⁴ College of Civil Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, PR China.
⁵ Centre for Future Materials, University of Southern Queensland, Springfield, QLD 4350, Australia. Electronic address: pingansong@gmail.com.

PMID: 36848771
DOI: 10.1016/j.jcis.2023.02.085

Abstract

Integrating high flame retardancy and excellent electromagnetic interference (EMI) shielding into polymetric materials is extremely necessary, and well dispersing conductive fillers into polymeric materials is still a great challenge because of incompatible interfacial polarity between polymer matrix and conductive fillers. Therefore, under the premise of maintaining integral conductive films in the process of hot compression, constructing a novel EMI shielding polymer nanocomposites where conductive films closely adhere to polymer nanocmposites layers should be a fascinating stratety. In this work, salicylaldehyde-modified chitosan decorated titanium carbide nanohybrid (Ti₃C₂T_x-SCS) was combined with piperazine-modified ammonium polyphosphate (PA-APP) to fabricate thermoplastic polyurethane (TPU) nanocomposites, which were used for construction of hierarchical nanocomposite films by inserting reduced graphene oxide (rGO) films into TPU/PA-APP/Ti₃C₂T_x-SCS nanocomposite layers through our self-developed air assisted hot pressing technique. The total heat release, total smoke release and total carbon monoxide yield for TPU nanocomposite containing 4.0 wt% Ti₃C₂T_x-SCS nanohybrid were 58.0%, 58.4% and 75.8% lower than those of pristine TPU, respectively. Besides, the hierarchical TPU nanocomposite film containing 1.0 wt% Ti₃C₂T_x-SCS presented an averaged EMI shielding effectiveness of 21.3 dB in X band. This work provides a promising strategy for fabricating fire safe and EMI shielding polymer nanocomposites.

Keywords: Air-assisted hot pressing technique; Electromagnetic interference shielding; Flame retardancy; Hierarchical structure; Multiple effect; Toxic fumes suppression.