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Issue 32, 2015
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A supramolecular assembly of cross-linked azobenzene/polymers for a high-performance light-driven actuator

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Abstract

Light-driven flexible actuators based on a photo-responsive polymer draw much attention due to their great ability for rapid and reversible light-to-work transduction based on a large deformation. An azobenzene chromophore with disulfonic groups (AAZO) was noncovalently grafted on the side-chain of a cationic polymer, poly(diallyldimethylammonium chloride) (PDAC), by electrostatic interaction in a specific weight ratio. A supramolecular assembly of cross-linked AAZO/PDAC showed a reversible isomerization on irradiation by UV light followed by a reversion with a good cycling stability for 50 cycles. Light-driven actuators based on the AAZO/PDAC film exhibited a large deformation by rolling-up into a tube with double walls even when the light was off, along with a spontaneous shape recovery. This photomechanical deformation arose from different rates and degrees of structural transformation of AAZO/PDAC between the front (facing UV light) and back side with the segmental motion of polymers.

Graphical abstract: A supramolecular assembly of cross-linked azobenzene/polymers for a high-performance light-driven actuator

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Publication details

The article was received on 28 Feb 2015, accepted on 30 Apr 2015 and first published on 01 May 2015


Article type: Paper
DOI: 10.1039/C5TA01543J
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Citation: J. Mater. Chem. A, 2015,3, 16453-16460
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    A supramolecular assembly of cross-linked azobenzene/polymers for a high-performance light-driven actuator

    C. Qin, Y. Feng, W. Luo, C. Cao, W. Hu and W. Feng, J. Mater. Chem. A, 2015, 3, 16453
    DOI: 10.1039/C5TA01543J

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