Highly Stretchable Shape Memory Self-Soldering Conductive Tape with Reversible Adhesion Switched by Temperature

Nano-Micro Letters

Quan Zhang¹  Yiwen Lv¹  Mengyan Wang¹  Yi Huang¹  Xiangqian Fan¹  Jiajie Liang¹  Rujun Ma¹  Xiang Fu¹  Wen He¹  Yiwen Bo¹  Chunyang Zhang¹  Yongsheng Chen² 

[1] School of Materials Science and Engineering, National Institute for Advanced Materials, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tongyan Road 38, 300350, Tianjin, People’s Republic of China;State Key Laboratory and Institute of Elemento-Organic Chemistry, Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, College of Chemistry, Nankai University, Weijin Road 94, 300071, Tianjin, People’s Republic of China;

关键词: Shape memory performance;    Self-soldering conductive tape;    Reversible adhesion;    Stretchable electronics;   

DOI  :  10.1007/s40820-021-00652-0

来源: Springer

【 摘 要 】

tsShape memory self-soldering tape used as conductive interconnecting material.Perfect shape and conductivity memory performance and anti-fatigue performance.Reversible strong-to-weak adhesion switched by temperature.AbstractWith practical interest in the future applications of next-generation electronic devices, it is imperative to develop new conductive interconnecting materials appropriate for modern electronic devices to replace traditional rigid solder tin and silver paste of high melting temperature or corrosive solvent requirements. Herein, we design highly stretchable shape memory self-soldering conductive (SMSC) tape with reversible adhesion switched by temperature, which is composed of silver particles encapsulated by shape memory polymer. SMSC tape has perfect shape and conductivity memory property and anti-fatigue ability even under the strain of 90%. It also exhibits an initial conductivity of 2772 S cm−1 and a maximum tensile strain of ~ 100%. The maximum conductivity could be increased to 5446 S cm−1 by decreasing the strain to 17%. Meanwhile, SMSC tape can easily realize a heating induced reversible strong-to-weak adhesion transition for self-soldering circuit. The combination of stable conductivity, excellent shape memory performance, and temperature-switching reversible adhesion enables SMSC tape to serve two functions of electrode and solder simultaneously. This provides a new way for conductive interconnecting materials to meet requirements of modern electronic devices in the future.

【 授权许可】

CC BY