Flexible and Highly Conductive AgNWs/PEDOT:PSS Functionalized Aramid Nonwoven Fabric for High-Performance Electromagnetic Interference Shielding and Joule Heating

摘要

High-performance multifunctional textiles are highly demanded for human health-related applications.In this work,a highly conductive nonwoven fabric is fabricated by coating silver nanowires(AgNWs)/poly(3,4-ethyl enedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)on a poly(m-phenylene isophthalamide)(PMIA)nonwoven fabric through a multistep dip coating process.The as-prepared PMIA/AgNWs/PEDOT:PSS composite nonwoven fabric shows an electrical resistance as low as 0.92 ± 0.06 Ω sq~(-1)with good flexibility.The incorporation of the PEDOT:PSS coating layer improves the adhesion between AgNWs and PMIA nonwoven fabric,and also enhances the thermal stability of the composite nonwoven fabric.Electromagnetic interference(EMI)shielding and Joule heating performances of the PMIA/AgNWs/PEDOT:PSS composite nonwoven fabric are also investigated.The results show that the average EMI shielding effectiveness(SE)of the single-layer nonwoven fabric in X-band is as high as 56.6 dB and retains a satisfactory level of SE after being washed,bended,and treated with acid/alkali solution and various organic solvents.The composite nonwoven fabric also exhibits low voltage-driven Joule heating performance with reliable heating stability and repeatability.It can be envisaged that the multifunctional PMIA/AgNWs/PEDOT:PSS nonwoven fabric with reliable stability and chemical robustness can be used in EMI shielding devices and personal thermal management products.