Flexible Transparent PES/Silver Nanowires/PET Sandwich-Structured Film for High-Efficiency Electromagnetic Interference Shielding
Flexible Transparent PES/Silver Nanowires/PET Sandwich-Structured Film for High-Efficiency Electromagnetic Interference Shielding
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DOI：
10.1021/la300720y
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发表时间：
2012-05-08
期刊：
影响因子：
3.9
通讯作者：
Li, Robert Kwok-Yiu
中科院分区：
文献类型：
--
作者：
Hu, Mingjun;Gao, Jiefeng;Li, Robert Kwok-Yiu
我们发展了一种高产量的银纳米线的合成策略，采用两步注入多元醇的方法。在水性油墨中制备了银纳米线和聚氧化乙烯（PEO）（M-w = 900 000）。采用刮涂棒涂技术在PET基材上制备了不同厚度的湿法复合薄膜。在PEO的辅助下，银纳米线在PET衬底上呈现均匀分布。然后，由于PEO在大气条件下的特殊热行为，在相对较低的温度下原位热去除PEO。在PET基底上制备的金属纳米线薄膜表现出优异的稳定性以及良好的导电性和透光性。采用同样的包覆方法在银纳米线网络上包覆一层透明的聚醚砜（PES），以防止银纳米线的脱落和腐蚀。获得了三明治结构的柔性透明膜，并显示出优异的电磁干扰（EMI）屏蔽效果。
We have developed a kind of high-yield synthesis strategy for silver nanowires by a two-step injection polyol method. Silver nanowires and polyethylene oxide (PEO) (M-w = 900 000) were prepared in a homogeneous-coating ink. Wet composite films with different thicknesses were fabricated on a PET substrate by drawn-down rod-coating technology. Silver nanowires on PET substrates present a homogeneous distribution under the assistance of PEO. Then PEO was thermally removed in situ at a relatively low temperature attributed to its special thermal behavior under atmospheric conditions. As-prepared metallic nanowire films on PET substrates show excellent stability and a good combination of conductivity and light transmission. A layer of transparent poly(ethersulfones) (PESs) was further coated on silver nanowire networks by the same coating method to prevent the shedding and corrosion of silver nanowires. Sandwich-structured flexible transparent films were obtained and displayed excellent electromagnetic interference (EMI) shielding effectiveness.