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Multi-hierarchical flexible composites towards superior fire safety and electromagnetic interference shielding

Nano Research 2022年第10期15卷 9531-9543页

作者： Kexin Chen Miao Liu Yongqian Shi Hengrui Wang Libi Fu Yuezhan Feng Pingan Song College of Environment and Safety Engineering Fuzhou UniversityFuzhou 350116China College of Civil Engineering Fuzhou UniversityFuzhou 350116China Key Laboratory of Materials Processing and Mold Ministry of Education National Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002China Centre for Future Materials University of Southern QueenslandSpringfieldQLD 4350Australia

Vast amounts of electromagnetic waves are generated in modern society,which severely endanger human health and cause instrument ***,practical application of electromagnetic shielding polymer-based materials aspires to flame ***,cellulose acetate butyrate modified ammonium polyphosphate(CAPP)and phosphoramide flame retardant decorated short carbon fiber(MSCF)were synthesized separately and then simultaneously blended into thermoplastic polyurethane(TPU)to prepare a series of flame retardant TPU ***,the multi-hierarchical flexible TPU/CAPP/MSCF composites were fabricated via our self-developed air-assisted thermocompression *** results revealed that the TPU/CAPP/MSCF showed improved thermal ***,the TPU/10CA/2.5F incorporated with 10.0 wt.%CAPP and 2.5 wt.%MSCF respectively exhibited 77.8%and 58.6%reduction in peak of heat release rate(PHRR)and total heat release(THR),compared to those of pure *** addition,the TPU/10CA/2.5F passed the UL-94 V-0 rating test and achieved a higher limit oxygen index(LOI)(27.3%)than pure TPU(21.7%).In the case of electromagnetic interference shielding effectiveness(EMI SE),the TPU/10CA/10.0F-SW with 10 wt.%CAPP and 10 wt.%MSCF dispersed in the surface layer and Ti_(3)C_(2)Tx MXene intercalated in the interlayer exhibited EMI SE of 43.8 dB in X band and 32.0 dB in K ***,synergistic effect between CAPP and MSCF together with scattered and multiply adsorbed effect of MSCF,MXene and CAPP was responsible for fire safety and EMI shielding property *** work provides a fascinating strategy for fabricating multi-hierarchical flexible TPU composites with outstanding flame retardant and EMI shielding performances.

关键词： MXene multi-hierarchical structure flame retardancy electromagnetic interference shielding air-assisted thermocompression

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