Abstract
Advanced flexible thermoplastic polyurethane-based films via different response have attracted great attentions for shape memory and other potential applications. However, the accurate and repeatable response control with high mechanical and thermal properties still remains a great challenge. Here, we proposed the flexible photo-actuated thermoplastic polyurethane/carbon nanotube/fullerene composite film (TPU/SCNT-C60) via nano-templated assembly strategy, in which a petal-like SCNT-C60 nanostructure can be obtained by tuning the constituent of carbon nano-templates. This special carbon framework can increase physical cross-linking points and served as photo-thermal conversion reagent due to the enhanced intermolecular interactions and synergistic effect, resulting in an obvious increase of the thermal conductivity and mechanical properties. Especially, the flexible TPU/SCNT-C60 1:3 film exhibited a high thermal conductivity of 1.21 W m − 1K−1 and a high tensile strength over 23 MPa with a large workable strain range about 500%. Moreover, it presented controllable NIR photo-actuated shape change and recovery behavior with excellent repeatability during complete 15 cycles. Our strategy opens a new way for photo-triggered device and show tremendous potential for various applications.
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