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Tunable Light-Responsive Polyurethane-urea Elastomer Driven by Photochemical and Photothermal Coupling Mechanism.
Wu, Lei; Huang, Xia; Wang, Meng; Chen, Jishizhan; Chang, Jinke; Zhang, Han; Zhang, Xuetong; Conn, Andrew; Rossiter, Jonathan; Birchall, Martin; Song, Wenhui.
Afiliación
  • Wu L; Centre of Biomaterials for in Surgical Reconstruction and Regeneration, Department of Surgical Biotechnology, Division of Surgery & Interventional Science, University College London, London NW3 2PF, United Kingdom.
  • Huang X; Centre of Biomaterials for in Surgical Reconstruction and Regeneration, Department of Surgical Biotechnology, Division of Surgery & Interventional Science, University College London, London NW3 2PF, United Kingdom.
  • Wang M; Centre of Biomaterials for in Surgical Reconstruction and Regeneration, Department of Surgical Biotechnology, Division of Surgery & Interventional Science, University College London, London NW3 2PF, United Kingdom.
  • Chen J; Centre of Biomaterials for in Surgical Reconstruction and Regeneration, Department of Surgical Biotechnology, Division of Surgery & Interventional Science, University College London, London NW3 2PF, United Kingdom.
  • Chang J; Centre of Biomaterials for in Surgical Reconstruction and Regeneration, Department of Surgical Biotechnology, Division of Surgery & Interventional Science, University College London, London NW3 2PF, United Kingdom.
  • Zhang H; School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, United Kingdom.
  • Zhang X; Centre of Biomaterials for in Surgical Reconstruction and Regeneration, Department of Surgical Biotechnology, Division of Surgery & Interventional Science, University College London, London NW3 2PF, United Kingdom.
  • Conn A; Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, PR China.
  • Rossiter J; Dept of Engineering Mathematics and Bristol Robotics Laboratory, University of Bristol, Bristol BS8 1UB, United Kingdom.
  • Birchall M; Dept of Engineering Mathematics and Bristol Robotics Laboratory, University of Bristol, Bristol BS8 1UB, United Kingdom.
  • Song W; UCL Ear Institute, Royal National Ear Nose and Throat and Eastman Dental Hospitals (UCLH NHS Foundation Trust), University College London, London WC1X 8EE, United Kingdom.
ACS Appl Mater Interfaces ; 16(15): 19480-19495, 2024 Apr 17.
Article en En | MEDLINE | ID: mdl-38581369
ABSTRACT
Light-driven soft actuators based on photoresponsive materials can be used to mimic biological motion, such as hand movements, without involving rigid or bulky electromechanical actuations. However, to our knowledge, no robust photoresponsive material with desireable mechanical and biological properties and relatively simple manufacture exists for robotics and biomedical applications. Herein, we report a new visible-light-responsive thermoplastic elastomer synthesized by introducing photoswitchable moieties (i.e., azobenzene derivatives) into the main chain of poly(ε-caprolactone) based polyurethane urea (PAzo). A PAzo elastomer exhibits controllable light-driven stiffness softening due to its unique nanophase structure in response to light, while possessing excellent hyperelasticity (stretchability of 575.2%, elastic modulus of 17.6 MPa, and strength of 44.0 MPa). A bilayer actuator consisting of PAzo and polyimide films is developed, demonstrating tunable bending modes by varying incident light intensities. Actuation mechanism via photothermal and photochemical coupling effects of a soft-hard nanophase is demonstrated through both experimental and theoretical analyses. We demonstrate an exemplar application of visible-light-controlled soft "fingers" playing a piano on a smartphone. The robustness of the PAzo elastomer and its scalability, in addition to its excellent biocompatibility, opens the door to the development of reproducible light-driven wearable/implantable actuators and lightweight soft robots for clinical applications.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Robótica / Elastómeros Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: Reino Unido Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Robótica / Elastómeros Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: Reino Unido Pais de publicación: Estados Unidos