A simple method was developed to fabricate magnetically and optically responsive actuators utilizing composites of polycaprolactone (PCL) and polydimethylsiloxane (PDMS) loaded with iron oxide (Fe3O4) nanoparticles. An electrospinning technique enables to obtain Fe3O4 / PCL/PDMS composites with nanofiber structure. We demonstrate the self-folding ability of our developed composites upon exposing to external alternating magnetic field (AMF) or light. The self-folding behavior contributed to the structure change and stress relaxation of the composites, resulting from the temperature increase caused by the AMF and light absorption properties of Fe3O4 nanoparticles. The findings in this work could provide new ideas to design advanced complex self-folding materials.
Kuei-Ren Chen, Wei-Hao Wang, and Ta-I Yang, "Optically and magnetically induced self-folding polymer composite prepared by electrospinning technique (Conference Presentation)," Proc. SPIE 10596, Behavior and Mechanics of Multifunctional Materials and Composites XII, 105960Q (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 06, 2018; Published: 27 March 2018); https://doi.org/10.1117/12.2296573.5759118822001.
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