Electromagnetic interference(EMI)is becoming commonplace with the development of modern electronics.In this work,a series of conductive polymer composite fabrics that have high EMI shielding effectiveness(SE),high mec...Electromagnetic interference(EMI)is becoming commonplace with the development of modern electronics.In this work,a series of conductive polymer composite fabrics that have high EMI shielding effectiveness(SE),high mechanical strength,and resilience to adverse conditions were prepared.Crosslinked hyperbranched polyamidoamine(referred to as xHP-Qy)was used to create a conductive Ag layer tightly bound to the underlying matrix of poly(meta-phenylene isophthalamide)(PMIA).The morphology and physicochemical properties of the starting materials,intermediates,and the final PMIA/xHPQy/Ag fabrics were characterized extensively.The PMIA matrix and the Ag layer were connected by the xHP-Qy that had a distinct antenna-shaped structure.The lowest resistivity and highest EMI SE of the fabrics were 2.37×10^(−3)Ω·cm and 107.66 dB,respectively.It was further verified by finite element simulation that the PMIA/xHP-Qy/Ag had an exceptional EMI shielding performance.The fabrics maintained their superior performance despite harsh environments(high/low temperature,high humidity,strong acid/alkali,solvents,salt spray corrosion)or mechanical deformations(bending-stretching,winding-releasing,abrading).The developed strategy thus created access to resilient functional materials suitable for use in highly demanding scenarios.展开更多
基金financially by the National Natural Science Foundation of China(52073135,51673089,51903114)the Natural Science Foundation of Shandong Province(ZR2020ME066)the Yantai City Major Science and Technology Innovation Project(2024ZDCX016).
文摘Electromagnetic interference(EMI)is becoming commonplace with the development of modern electronics.In this work,a series of conductive polymer composite fabrics that have high EMI shielding effectiveness(SE),high mechanical strength,and resilience to adverse conditions were prepared.Crosslinked hyperbranched polyamidoamine(referred to as xHP-Qy)was used to create a conductive Ag layer tightly bound to the underlying matrix of poly(meta-phenylene isophthalamide)(PMIA).The morphology and physicochemical properties of the starting materials,intermediates,and the final PMIA/xHPQy/Ag fabrics were characterized extensively.The PMIA matrix and the Ag layer were connected by the xHP-Qy that had a distinct antenna-shaped structure.The lowest resistivity and highest EMI SE of the fabrics were 2.37×10^(−3)Ω·cm and 107.66 dB,respectively.It was further verified by finite element simulation that the PMIA/xHP-Qy/Ag had an exceptional EMI shielding performance.The fabrics maintained their superior performance despite harsh environments(high/low temperature,high humidity,strong acid/alkali,solvents,salt spray corrosion)or mechanical deformations(bending-stretching,winding-releasing,abrading).The developed strategy thus created access to resilient functional materials suitable for use in highly demanding scenarios.
