Electromagnetic interference (EMI) shielding composites with good flexibility and weatherability properties have attracted increased attention. In this study, we combined the surface modification method of sub-atmospheric pressure glow discharge plasma with in situ atmospheric pressure surface dielectric barrier discharge plasma (APSDBD) reduction to prepare polyethylene terephthalate supported silver (Ag/PET). Due to the prominent surface modification of PET film, mild plasma reduction, and effective control of the silver morphology by polyvinylpyrrolidone (PVP), a 3.32 μm thick silver film with ultralow sliver loading (0.022 wt%) exhibited an EMI shielding efficiency (SE) of 39.45 dB at 0.01 GHz and 31.56 dB at 1.0 GHz (>30 dB in the range of 0.01–1.0 GHz). The SEM results and EMI shielding analysis indicated that the high performance originated from the synergistic effect of the formation of silver nanoparticles (AgNPs) with preferentially oriented cell-like surface morphologies and layer-by-layer-like superimposed microstructures inside, which demonstrated strong microwave reflection properties. Fourier transform infrared spectrometer and x-ray diffractometer showed that the surface structures of the heat-sensitive substrate materials were not destroyed by plasma. Additionally, APSDBD technology for preparing Ag/PET had no special requirements on the thickness, dielectric constant, and conductivity of the substrate, which provides an effective strategy for manufacturing metal or alloy films on surfaces of heat-sensitive materials at a relatively low cost.

具有良好的柔韧性和耐候性的电磁干扰（EMI）屏蔽复合材料引起了越来越多的关注。本研究将亚大气压辉光放电等离子体的表面改性方法与原位大气压表面介电势垒放电等离子体（APSDBD）还原相结合，制备了聚对苯二甲酸乙二醇酯负载银（Ag / PET）。由于PET膜，轻度等离子还原，和由聚乙烯基吡咯烷酮（PVP）有效地控制了银的形态的突出表面改性，一个3.32 μ米，超低棉条装载（0.022重量％）表现出的EMI屏蔽效率厚的银膜（SE）在0.01 GHz时为39.45 dB，在1.0 GHz时为31.56 dB（在0.01-1.0 GHz范围内> 30 dB）。SEM结果和EMI屏蔽分析表明，高性能源自形成银纳米颗粒（AgNPs）的协同效应，该银纳米颗粒具有优先定向的细胞状表面形态和内部逐层叠加的微观结构，从而证明了强微波反射特性。傅立叶变换红外光谱仪和X射线衍射仪表明，热敏基材的表面结构没有被等离子体破坏。此外，用于制备Ag / PET的APSDBD技术对衬底的厚度，介电常数和电导率没有特殊要求，