Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 135, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2020.105931
Keywords
Shape memory; PDA nanospheres; Light-response; Self-healing
Funding
- National Natural Science Foundation of China (NNSFC) [51573106, 51721091]
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Despite tremendous advances in the preparation of smart materials, it remains a great challenge to integrate shape memory and self-healing properties into one material system, which have received increasing interests because of their many potential applications. Herein, the PCL/TPU blends are prepared as shape memory matrix by simple solution blending. Then the polydopamine (PDA) nanospheres acted as photothermal fillers were incorporated into PCL/TPU blends which enables the system to exhibit excellent light-response shape memory effect with a shape recovery ratio of 100%. Besides, the nanocomposites also own good self-healing performance because of the microporous structure. The surface crack can be healed in 150 s under light irradiation, and the healing efficiency can reach 78.53%. Therefore, the fast light-response shape memory effect and rapidly self-healing property, along with the facile fabrication processes, make PCL/TPU/PDA nanocomposites ideal for a variety of applications, such as biomedical microdevices, artificial muscles and soft robotics.
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