Electrically conductive adhesives based on thermoplastic polyurethane filled with silver flakes and carbon nanotubes

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• 作者：Jie Luo^a ; ^b ; Zhijie Cheng^a ; Chaowei Li^a ; ^b ; Liangjie Wang^a ; ^b ; Cuiping Yu^a ; Yue Zhao^b ; Minghai Chen^a ; ; Qingwen Li^a ; Yagang Yao^a ; ^{ygyao2013@sinano.ac.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Electrically conductive adhesives ; Carbon nanotube ; Electrical conductivity ; Mechanical properties ; Thermal stability
• 刊名：Composites Science and Technology
• 出版年：2016
• 出版时间：6 June 2016
• 年：2016
• 卷：129
• 期：Complete
• 页码：191-197
• 全文大小：1941 K

文摘

Flexible conductive adhesive could be used in flexible device electronic packaging. In this study, carbon nanotubes (CNTs) were used as one-dimensional conductive scaffolds to construct effective electrical networks among the silver flakes in electrically conductive adhesives (ECAs) for saving noble metal fillers and reducing the cost because CNTs used as conductivity fillers could bridge the neighboring silver flakes to accelerate the electron transport. The electrical, mechanical, and thermal properties have been enhanced after adding CNTs. The electrical conductivity increased 85.6% after 4.5 wt% CNT added into the 50 wt% Ag TPU adhesives. In addition, after the Ag flakes modified by succinic acid (SA), the electrical conductivity has also been improved. The development of highly conductive, flexible, and low cost ECAs will allow them to be widely used in flexible electronic devices packaging in the future.