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Photocrosslinking Patterning of Single-Layered Polymer Actuators for Controllable Motility and Automatic Devices
journal contribution
posted on 2019-04-05, 00:00 authored by Jiang Wei, Xiaxin Qiu, Lidong ZhangShape-programmed
deformation of soft polymer films is essential
for applications in robotics, self-adaptive devices, and sensors.
In comparison to bilayer polymer actuators, the challenge remains
to manipulate single-layered soft actuators for rapid, reversible,
and shape-programmed deformations in response to external stimuli
owing to their homogeneous composite structures. Herein, this work
reports a soft polymer film actuator that has a single-layered structure,
yet demonstrates the shape-programmed motility. The actuator is composed
of polyvinylidene fluoride film as a matrix and patterned by photocrosslinking
of acrylamide and N′,N′-methylenebisacrylamide,
which generates soft–hard alternating segments in the structure.
As it is exposed to acetone vapors, the soft–hard structures
lead to an unequal response that results in the shape-programmed deformation.
The actuator is elastic (strain: 160%) and tough (stress: 40 MPa)
and can maintain its rapid, reversible, and shape-programmed motions
for a few hours, even longer. The soft–hard structure enables
the film actuator (3.5 mg) to give a contracting stress of 4 MPa that
is used in an automatic device able to lift a cargo of 5.09 g, ∼1453
times heavier than the film itself. The power output reaches 474 J
kg–1, ∼100 times higher than the reported
soft actuators. This simple application indicates a potential for
the soft actuator used in acetone vapor sensing devices.
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Keywords
acetone vaporbilayer polymer actuatorsshape-programmed deformationshape-programmed motionsPhotocrosslinking Patterningshape-programmed motility4 MPaControllable Motility40 MPaAutomatic Devices Shape-programmed deformationwork reportssingle-layered structureself-adaptive devicespower outputshape-programmed deformationsapplicationpolymer film actuatorcontracting stress5.09 gacetone vaporspolymer filmsresponseSingle-Layered Polymer Actuatorspolyvinylidene fluoride film
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