3D printed conductive composite materials can realize customizable preparation of electronic information devices. Their potential applications in the fields of flexible electronics, sensors, nerve catheters, and wearable devices have attracted widespread attention from researchers at home and abroad. However, the development of ideal functional and highly conductive 3D printing materials remains a challenge in this field.
To this end, the team of Professor Leng Jinsong of Harbin Institute of Technology and the team of Professor Daniel Therriault of Montreal Institute of Technology have proposed a simple, easy-to-use, high-efficiency, multi-functional The preparation strategy of functional shape memory conductive composite materials, and demonstrated the application prospects of 3D printing in the electronic field. It is reported that metal silvered carbon nanofibers are a new type of composite conductive fiber, which can effectively combine the high aspect ratio of carbon nanofibers with the excellent electrical properties of metal silver. Under the synergy of the two, the composite material does not require any Conductivity can be obtained up to 2.1 × 10 5S / m. Thermoplastic shape memory polymer materials that can produce a functional response to external stimuli can not only improve the 3D printing performance of composite materials, but also give intelligent characteristics to the active deformation of printed structures.
Research shows that this new type of composite material can achieve straight writing 3D printing of a variety of complex structures (including self-supporting structures) without any supporting material at room temperature. What's more worth mentioning is that based on the shape memory effect and excellent electrical properties of the material, the prepared 3D printed structure can exhibit fast-responding electro-driven shape memory behavior at low voltage (1V). By 3D printing this new type of conductive composite material, they prepared a variety of high-performance electronic devices, which fully demonstrated the synergistic effect of multiple nano-functional composite materials and 3D printing in the fields of conductive originals, sensors, electromagnetic shielding and soft robots. Excellent application potential.