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Programmable Photothermal Actuation using Novel Negative Photochromic Donor-Acceptor Stenhouse Adduct (DASA) Polymers

ORAL

Abstract

Light-driven actuation has significant advantages including untethered operation, precise spatiotemporal activation, and the ability to operate in complex surroundings without significant modification. Here, we use a new class of molecular photoswitches, called donor-acceptor Stenhouse adducts (DASAs), to generate a novel but conceptually simple photo-responsive polymer bilayer actuator, capable of repeatedly lifting a load against the force of gravity. We will present a synthesis pathway for chemically attaching DASA conjugates to poly(hexyl methacrylate) through norbornadiene click chemistry, and will demonstrate actuator performance. Importantly, we can leverage the different time scales of photothermal and photochemical responses of DASAs to achieve dynamic material control, including the ability to switch on and off actuation. Our results highlight the promising benefits of high molar absorptivity, negative photochromism, and visible light absorption of DASAs for actuation.

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Presenters

  • Jaejun Lee

    University of Illinois at Urbana-Champaign, Department of Chemistry, Department of Mechanical Engineering, University of California at Santa Barbara, Department of Mechanical Engineering, University of California, Santa Barbara

Authors

  • Jaejun Lee

    University of Illinois at Urbana-Champaign, Department of Chemistry, Department of Mechanical Engineering, University of California at Santa Barbara, Department of Mechanical Engineering, University of California, Santa Barbara

  • Miranda Sroda

    Department of Chemistry, University of California at Santa Barbara, Department of Chemistry, University of California, Santa Barbara

  • Younghoon Kwon

    University of California, Santa Barbara, Department of Mechanical Engineering, University of California at Santa Barbara

  • Sara El-Arid

    Department of Chemistry, University of California at Santa Barbara

  • Serena Seshadri

    Department of Chemistry, University of California at Santa Barbara, Department of Chemistry, University of California, Santa Barbara

  • Luke Gockowski

    Department of Mechanical Engineering, University of California at Santa Barbara, Department of Mechanical Engineering, University of California, Santa Barbara

  • Elliot W. Hawkes

    Mechanical Engineering, University of California, Santa Barbara, Mechanical Engineering, UC Santa Barbara, Department of Mechanical Engineering, University of California at Santa Barbara, Department of Mechanical Engineering, University of California, Santa Barbara

  • Javier Read de Alaniz

    Department of Chemistry, University of California at Santa Barbara, Department of Chemistry, University of California, Santa Barbara

  • Megan Valentine

    University of California, Santa Barbara, Mechanical Engineering, University of California, Santa Barbara, Department of Mechanical Engineering, University of California at Santa Barbara, Department of Mechanical Engineering, University of California, Santa Barbara