Rapid Near‐Infrared Light Responsive Shape Memory Polymer Hybrids and Novel Chiral Actuators Based on Photothermal W18O49 Nanowires

Photoresponsive actuators are built by introducing oligo(ethylene glycol) (OEG)‐modified W18O49 nanowires into cross‐linked polyethylene glycol diacrylate (cPEGDA) polymer matrices. Due to the good compatibility, OEG‐W18O49 NWs disperse well and increase the crystallinity of cPEGDA matrices even in...

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Bibliographic Details
Published in:Advanced functional materials 2019-08, Vol.29 (33), p.n/a
Main Authors: Zhou, Yue, Tan, Junyan, Chong, Dandan, Wan, Xinhua, Zhang, Jie
Format: Article
Language:English
Subjects:
Actuators
Crystal structure
Crystallinity
Ethylene glycol
hybrids
Infrared radiation
Materials science
Nanocomposites
Nanowires
photoresponsive actuators
Polyethylene glycol
Polymers
Shape memory
shape memory polymers
W18O49 nanowires
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Summary:Photoresponsive actuators are built by introducing oligo(ethylene glycol) (OEG)‐modified W18O49 nanowires into cross‐linked polyethylene glycol diacrylate (cPEGDA) polymer matrices. Due to the good compatibility, OEG‐W18O49 NWs disperse well and increase the crystallinity of cPEGDA matrices even in high loading concentrations (4.0 wt%). The cPEGDA/W18O49 nanocomposites show efficient photothermal transition and rapid shape memory behaviors. They can raise the local temperature to 160 °C in only 8.5 s and recover the initial shape within 10 s. Making use of the broad and strong absorption property of W18O49, the cPEGDA/W18O49 NW actuators respond to both ultraviolet and near‐infrared light and make contraction and bending motions. Furthermore, by utilizing oriented chain segments of the crystalline polymer and vector sum of shape recovery forces, the cPEGDA/W18O49 NW hybrid actuators exhibit stable helical deformation (right‐handed and left‐handed). Photoresponsive actuators are built by introducing oligo(ethylene glycol)‐modified W18O49 nanowires into cross‐linked polyethylene glycol diacrylate matrices. Due to the good compatibility, such actuators can raise the local temperature to160 °C in 8.5 s, recover the initial shape within 10 s under irradiation of near‐infrared light. By utilizing the vector sum of shape recovery forces, actuators can exhibit stable helical deformations.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.201901202