Flexible Transparent PES/Silver Nanowires/PET Sandwich-Structured Film for High-Efficiency Electromagnetic Interference Shielding

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• 作者：Mingjun Hu ; Jiefeng Gao ; Yucheng Dong ; Kai Li ; Guangcun Shan ; Shiliu Yang ; Robert Kwok-Yiu Li
• 刊名：Langmuir
• 出版年：2012
• 出版时间：May 8, 2012
• 年：2012
• 卷：28
• 期：18
• 页码：7101-7106
• 全文大小：381K
• 年卷期：v.28,no.18(May 8, 2012)
• ISSN：1520-5827

文摘

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鈥?00) 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.