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作 者:Tingting Tang Shanchi Wang Yue Jiang Zhiguang Xu Yu Chen Tianshu Peng Fawad Khan Jiabing Feng Pingan Song Yan Zhao
机构地区:[1]College of Textile and Clothing Engineering,Soochow University,Suzhou 215123,China [2]China-Australia Institute for Advanced Materials and Manufacturing,Jiaxing University,Jiaxing 314001,China [3]AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China [4]Centre for Future Materials,University of Southern Queensland,Springfield Central,QLD 4300,Australia
出 处:《Journal of Materials Science & Technology》2022年第16期66-75,共10页材料科学技术(英文版)
基 金:funding support of the Key Laboratory of Flame Retardancy Finishing of Textile Materials,CNTAC(Q811580421);Australian Research Council(Nos.DP190102992 and FT190100188);the National Natural Science Foundation of China(Nos.51803200 and 52003104)。
摘 要: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 d B over the whole frequency range of 8–12 GHz with a thickness of~400μm.The as-developed PP/MXene composites hold great promise for reliable protection of next-generation electronic devices working in complex environments.
关 键 词:MXene Flame retardancy Polypropylene composite EMI shielding
分 类 号:TB332[一般工业技术—材料科学与工程] TN03[电子电信—物理电子学]
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