Fast, Light-Responsive, Metal-Like Polymer Actuators Generating High Stresses at Low Strain. Verpaalen, R. C. P., Varghese, S., Froyen, A., da Cunha, M. P., Pouderoijen, M. J., Severn, J. R., Bhatti, M. R., Peijs, T., Bastiaansen, C. W. M., Debije, M. G., Engels, T. A. P., & Schenning, A. P. H. J. MATTER, 2(6):1522–1534, June, 2020. SyMO Chem BVdoi abstract bibtex Producing lightweight polymeric actuators able to generate high stresses typical of hard metals and/or ceramics remains challenging. The photo-mechanical responses of ultra-drawn ultrahigh molecular weight polyethylene (UHMWPE) actuators containing azobenzene photo-switches with symmetrically attached polyethylene (PE) side chains are reported. Long PE side chains promote dispersion within the apolar UHMWPE matrix, and the ultra-drawn films are highly aligned. The ultra-drawn azobenzenedoped UHMWPE films have high Young's moduli (similar to 100 GPa) and are viscoelastic at room temperature at strains below 1%. The photo-mechanical response of the films is fast (\textless1 s), showing a high specific actuation stress response (\textgreater6 x 10(4) Pa (kg m(-3))(-1)) to UV or visible light at a low strain (similar to 0.06%). The actuator responds to rotating linearly polarized light, causing a photoinduced stress wave response. Such rapid, high-stress, low-strain, photo-mechanical responses are unique in soft polymer systems with physical values approaching hard metals/ceramics.
@article{verpaalen_fast_2020,
title = {Fast, {Light}-{Responsive}, {Metal}-{Like} {Polymer} {Actuators} {Generating} {High} {Stresses} at {Low} {Strain}},
volume = {2},
issn = {2590-2393},
doi = {10.1016/j.matt.2020.03.001},
abstract = {Producing lightweight polymeric actuators able to generate high stresses typical of hard metals and/or ceramics remains challenging. The photo-mechanical responses of ultra-drawn ultrahigh molecular weight polyethylene (UHMWPE) actuators containing azobenzene photo-switches with symmetrically attached polyethylene (PE) side chains are reported. Long PE side chains promote dispersion within the apolar UHMWPE matrix, and the ultra-drawn films are highly aligned. The ultra-drawn azobenzenedoped UHMWPE films have high Young's moduli (similar to 100 GPa) and are viscoelastic at room temperature at strains below 1\%. The photo-mechanical response of the films is fast ({\textless}1 s), showing a high specific actuation stress response ({\textgreater}6 x 10(4) Pa (kg m(-3))(-1)) to UV or visible light at a low strain (similar to 0.06\%). The actuator responds to rotating linearly polarized light, causing a photoinduced stress wave response. Such rapid, high-stress, low-strain, photo-mechanical responses are unique in soft polymer systems with physical values approaching hard metals/ceramics.},
number = {6},
urldate = {2020-06-23},
journal = {MATTER},
author = {Verpaalen, Rob C. P. and Varghese, Shaji and Froyen, Arne and da Cunha, Marina Pilz and Pouderoijen, Maarten J. and Severn, John R. and Bhatti, Muhammad R. and Peijs, Ton and Bastiaansen, Cees W. M. and Debije, Michael G. and Engels, Tom A. P. and Schenning, Albertus P. H. J.},
month = jun,
year = {2020},
note = {SyMO Chem BV},
pages = {1522--1534},
}
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The photo-mechanical responses of ultra-drawn ultrahigh molecular weight polyethylene (UHMWPE) actuators containing azobenzene photo-switches with symmetrically attached polyethylene (PE) side chains are reported. Long PE side chains promote dispersion within the apolar UHMWPE matrix, and the ultra-drawn films are highly aligned. The ultra-drawn azobenzenedoped UHMWPE films have high Young's moduli (similar to 100 GPa) and are viscoelastic at room temperature at strains below 1%. The photo-mechanical response of the films is fast (\\textless1 s), showing a high specific actuation stress response (\\textgreater6 x 10(4) Pa (kg m(-3))(-1)) to UV or visible light at a low strain (similar to 0.06%). The actuator responds to rotating linearly polarized light, causing a photoinduced stress wave response. Such rapid, high-stress, low-strain, photo-mechanical responses are unique in soft polymer systems with physical values approaching hard metals/ceramics.","number":"6","urldate":"2020-06-23","journal":"MATTER","author":[{"propositions":[],"lastnames":["Verpaalen"],"firstnames":["Rob","C.","P."],"suffixes":[]},{"propositions":[],"lastnames":["Varghese"],"firstnames":["Shaji"],"suffixes":[]},{"propositions":[],"lastnames":["Froyen"],"firstnames":["Arne"],"suffixes":[]},{"propositions":["da"],"lastnames":["Cunha"],"firstnames":["Marina","Pilz"],"suffixes":[]},{"propositions":[],"lastnames":["Pouderoijen"],"firstnames":["Maarten","J."],"suffixes":[]},{"propositions":[],"lastnames":["Severn"],"firstnames":["John","R."],"suffixes":[]},{"propositions":[],"lastnames":["Bhatti"],"firstnames":["Muhammad","R."],"suffixes":[]},{"propositions":[],"lastnames":["Peijs"],"firstnames":["Ton"],"suffixes":[]},{"propositions":[],"lastnames":["Bastiaansen"],"firstnames":["Cees","W.","M."],"suffixes":[]},{"propositions":[],"lastnames":["Debije"],"firstnames":["Michael","G."],"suffixes":[]},{"propositions":[],"lastnames":["Engels"],"firstnames":["Tom","A.","P."],"suffixes":[]},{"propositions":[],"lastnames":["Schenning"],"firstnames":["Albertus","P.","H.","J."],"suffixes":[]}],"month":"June","year":"2020","note":"SyMO Chem BV","pages":"1522–1534","bibtex":"@article{verpaalen_fast_2020,\n\ttitle = {Fast, {Light}-{Responsive}, {Metal}-{Like} {Polymer} {Actuators} {Generating} {High} {Stresses} at {Low} {Strain}},\n\tvolume = {2},\n\tissn = {2590-2393},\n\tdoi = {10.1016/j.matt.2020.03.001},\n\tabstract = {Producing lightweight polymeric actuators able to generate high stresses typical of hard metals and/or ceramics remains challenging. The photo-mechanical responses of ultra-drawn ultrahigh molecular weight polyethylene (UHMWPE) actuators containing azobenzene photo-switches with symmetrically attached polyethylene (PE) side chains are reported. Long PE side chains promote dispersion within the apolar UHMWPE matrix, and the ultra-drawn films are highly aligned. The ultra-drawn azobenzenedoped UHMWPE films have high Young's moduli (similar to 100 GPa) and are viscoelastic at room temperature at strains below 1\\%. The photo-mechanical response of the films is fast ({\\textless}1 s), showing a high specific actuation stress response ({\\textgreater}6 x 10(4) Pa (kg m(-3))(-1)) to UV or visible light at a low strain (similar to 0.06\\%). The actuator responds to rotating linearly polarized light, causing a photoinduced stress wave response. 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