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Issue 47, 2005
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Large amplitude light-induced motion in high elastic modulus polymer actuators

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Abstract

Well-defined gradients in molecular alignment have been used as tools to generate large amplitude, light-induced deformations in stiff polymer networks. These systems are reversible, monolithic and based on a simple one-step self-assembly process. To fabricate the actuators, diacrylate dopants containing azobenzene moieties were blended with liquid crystalline diacrylate hosts and photopolymerized in a twisted configuration. The resulting twisted networks were heavily crosslinked with room temperature elastic moduli on the order of 1 GPa. Regardless of the temperature with respect to the glass transitions, subsequent exposure to UV radiation induced anisotropic expansion/contraction, and simple variations in geometry were used to generate uniaxial bending or helical coiling deformation modes. Because mechanical energy is directly related to elastic modulus, these systems are expected to provide significantly greater work output than contemporary polymer actuator materials.

Graphical abstract: Large amplitude light-induced motion in high elastic modulus polymer actuators

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Publication details

The article was received on 07 Sep 2005, accepted on 06 Oct 2005 and first published on 20 Oct 2005


Article type: Paper
DOI: 10.1039/B512655J
Citation: J. Mater. Chem., 2005,15, 5043-5048
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    Large amplitude light-induced motion in high elastic modulus polymer actuators

    K. D. Harris, R. Cuypers, P. Scheibe, C. L. van Oosten, C. W. M. Bastiaansen, J. Lub and D. J. Broer, J. Mater. Chem., 2005, 15, 5043
    DOI: 10.1039/B512655J

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