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Realizing balanced flame retardancy and electromagnetic interference shielding in hierarchical elastomer
Kexin Chen1, Hengrui Wang1, Yongqian Shi1
1College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, China.
Journal of Colloid and Interface Science
|September 22, 2023
Summary
This study developed a novel hybrid material combining flame retardancy and electromagnetic interference (EMI) shielding for electronics. The new material significantly reduced heat and smoke while achieving high EMI shielding effectiveness.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Achieving simultaneous flame retardancy and electromagnetic interference (EMI) shielding in materials is challenging due to conflicting mechanisms.
- Existing materials often fail to meet the dual requirements for advanced electronics and electrical applications.
Purpose of the Study:
- To synthesize a core-multishell hybrid material for enhanced flame retardancy and EMI shielding.
- To fabricate hierarchical TPU composites with improved safety and performance characteristics.
Main Methods:
- Microencapsulation was used to create an ammonium polyphosphate@chitosan@carbon nanotube (APP@CS@MWCNT) hybrid.
- The hybrid was incorporated into a TPU matrix, with a MXene film as an intermediate layer, to form hierarchical TPU composites.
Main Results:
- TPU composites with 1 wt% APP@CS@MWCNT showed a 67.4% reduction in peak heat release rate (PHRR) and a 35.6% decrease in peak smoke production rate (PSPR).
- The TPU/15AC@4M-SW composite achieved high EMI shielding effectiveness of 35.7 dB in the X band and 38.9 dB in the K band due to multiple reflection and polarization losses.
Conclusions:
- The developed hierarchical TPU composites effectively combine flame retardancy and EMI shielding properties.
- This approach offers a promising solution for safety and performance enhancement in electronic and electrical materials.
