Flexible and flame-retarding phosphorylated MXene/polypropylene composites for efficient electromagnetic interference shielding

Tang, Tingting and Wang, Shanchi and Jiang, Yue and Xu, Zhiguang and Chen, Yu and Peng, Tianshu and Khan, Fawad and Feng, Jiabing and Song, Pingan ORCID: https://orcid.org/0000-0003-1082-652X and Zhao, Yan (2022) Flexible and flame-retarding phosphorylated MXene/polypropylene composites for efficient electromagnetic interference shielding. Journal of Materials Science & Technology, 111. pp. 66-75. ISSN 1005-0302


Abstract

Flame-retardant composites with high electromagnetic interference (EMI) shielding performance are desirable for electronic device packaging. Despite great potential of MXene for high EMI, it still remains a great challenge to develop high-performance flame-retardant polymer/MXene composites with excellent EMI shielding effectiveness because of the poor oxidative stability of MXene. Herein, phosphorylated MXene/polypropylene (PP) composites are prepared by coating phosphorylated MXene on PP fabric followed by spraying polyethylenimine (PEI) and hot-pressing. The phosphorylated MXene proves to be more durable against oxidation than pure MXene due to the protection effect of polyphosphates. Upon hot-pressing, melted PP fibers are fused together at their contact points and thus as-prepared composites are bi-continuous with two interpenetrating phases. The composites show significantly improved thermal stability and flame retardancy relative to pure PP, with a low total heat release (THR) of 3.7 kJ/g and a heat release rate (HRR) of 50.0 W/g, which are reduced by 78% and 87%, respectively. In addition, the composites exhibit a high electrical conductivity of ∼36,700 S/m and an EMI shielding performance of ∼90 dB over the whole frequency range of 8–12 GHz with a thickness of ∼400 μm. The as-developed PP/MXene composites hold great promise for reliable protection of next-generation electronic devices working in complex environments.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 23 Mar 2022 04:53
Last Modified: 26 Mar 2022 05:55
Uncontrolled Keywords: MXene; Flame retardancy; Polypropylene composite; EMI shielding
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
40 ENGINEERING > 4016 Materials engineering > 401609 Polymers and plastics
40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
Socio-Economic Objectives (2020): 24 MANUFACTURING > 2409 Industrial chemicals and related products > 240910 Plastics
24 MANUFACTURING > 2409 Industrial chemicals and related products > 240908 Organic industrial chemicals (excl. resins, rubber and plastics)
Funding Details:
Identification Number or DOI: https://doi.org/10.1016/j.jmst.2021.08.091
URI: http://eprints.usq.edu.au/id/eprint/47358

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