Fast, light-responsive, metal-like polymer actuators generating high stresses at low strain

Rob C.P.  Verpaalen; S. Varghese; Arne Froyen; Marina Pilz Da Cunha; Maarten Pouderoijen; J.R. Severn; Muhammad Bhatti; A.A.J.M. Peijs; Cees W.M. Bastiaansen; Michael G. Debije; Tom A.P. Engels; Albert P.H.J. Schenning

doi:10.1016/j.matt.2020.03.001

Fast, light-responsive, metal-like polymer actuators generating high stresses at low strain

Rob C.P. Verpaalen, S. Varghese, Arne Froyen, Marina Pilz Da Cunha, Maarten Pouderoijen, J.R. Severn, Muhammad Bhatti, A.A.J.M. Peijs, Cees W.M. Bastiaansen, Michael G. Debije, Tom A.P. Engels, Albert P.H.J. Schenning (Corresponding author)

Onderzoeksoutput: Bijdrage aan tijdschrift › Tijdschriftartikel › Academic › peer review

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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 ultra-high 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 azobenzene-doped UHMWPE films have high Young's moduli (∼100 GPa) and are viscoelastic at room temperature at strains below 1%. The photo-mechanical response of the films is fast (<1 s), showing a high specific actuation stress response (>6 × 104 Pa (kg m−3)−1) to UV or visible light at a low strain (∼0.06%). The actuator responds to rotating linearly polarized light, causing a photo-induced 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.

Originele taal-2	Engels
Pagina's (van-tot)	1522-1534
Aantal pagina's	13
Tijdschrift	Matter
Volume	2
Nummer van het tijdschrift	6
DOI's	https://doi.org/10.1016/j.matt.2020.03.001
Status	Gepubliceerd - 3 jun. 2020

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The work of R.C.P.V. forms part of the research program of DPI, project 731.015.502. The work of M.J.P. is part of the Impuls 2 program of the TU/e. The authors would like to thank Henk Janssen (SyMO-Chem), Serge Sӧntjens (SyMO-Chem) and Xianwen Lou (Eindhoven University of Technology) for characterization of the azobenzene derivatives and valuable discussions. J.R.S. C.W.M.B. M.G.D. T.A.P.E. T.P. and A.P.H.J.S. conceived the research. S.V. and M.J.P. synthesized the PE-AZO dyes. R.C.P.V. A.F. and S.V. made the films and characterized the photo-mechanical properties. M.P.d.C. and M.R.B. provided suggestions on experiments and improvements. All authors contributed to writing the document. The authors declare no competing interests.

Financiers	Financiernummer
Technische Universiteit Eindhoven

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Verpaalen, R. C. P., Varghese, S., Froyen, A., Pilz Da Cunha, M., Pouderoijen, M., Severn, J. R., Bhatti, M., Peijs, A. A. J. M., Bastiaansen, C. W. M., Debije, M. G., Engels, T. A. P., & Schenning, A. P. H. J. (2020). Fast, light-responsive, metal-like polymer actuators generating high stresses at low strain. Matter, 2(6), 1522-1534. https://doi.org/10.1016/j.matt.2020.03.001

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title = "Fast, light-responsive, metal-like polymer actuators generating high stresses at low strain",

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 ultra-high 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 azobenzene-doped UHMWPE films have high Young's moduli (∼100 GPa) and are viscoelastic at room temperature at strains below 1%. The photo-mechanical response of the films is fast (<1 s), showing a high specific actuation stress response (>6 × 104 Pa (kg m−3)−1) to UV or visible light at a low strain (∼0.06%). The actuator responds to rotating linearly polarized light, causing a photo-induced 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.",

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AU - Verpaalen, Rob C.P.

AU - Varghese, S.

AU - Froyen, Arne

AU - Pilz Da Cunha, Marina

AU - Pouderoijen, Maarten

AU - Severn, J.R.

AU - Bhatti, Muhammad

AU - Peijs, A.A.J.M.

AU - Bastiaansen, Cees W.M.

AU - Debije, Michael G.

AU - Engels, Tom A.P.

AU - Schenning, Albert P.H.J.

PY - 2020/6/3

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N2 - 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 ultra-high 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 azobenzene-doped UHMWPE films have high Young's moduli (∼100 GPa) and are viscoelastic at room temperature at strains below 1%. The photo-mechanical response of the films is fast (<1 s), showing a high specific actuation stress response (>6 × 104 Pa (kg m−3)−1) to UV or visible light at a low strain (∼0.06%). The actuator responds to rotating linearly polarized light, causing a photo-induced 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.

AB - 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 ultra-high 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 azobenzene-doped UHMWPE films have high Young's moduli (∼100 GPa) and are viscoelastic at room temperature at strains below 1%. The photo-mechanical response of the films is fast (<1 s), showing a high specific actuation stress response (>6 × 104 Pa (kg m−3)−1) to UV or visible light at a low strain (∼0.06%). The actuator responds to rotating linearly polarized light, causing a photo-induced 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.

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KW - actuation strain

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KW - hard actuators

KW - high stress

KW - light-responsive polymers

KW - photo-thermal dyes

KW - soft actuators

KW - specific actuation stress

KW - ultra-drawn polyethylene

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JO - Matter

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ER -

Fast, light-responsive, metal-like polymer actuators generating high stresses at low strain

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