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Thermo- and photo-responsive composite hydrogels with programmed deformations

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Abstract

Self-shaping hydrogels have received increasing attention due to their promising applications in soft robotics and biomedical fields. Here we report the fabrication of photo- and thermo-responsive composite hydrogels with heterogeneous structures and corresponding programmed deformations under stimulation. These composite gels were developed by photolithographic polymerization to form patterned non-responsive polyacrylamide gels and then thermal polymerization to form responsive poly(N-isopropyl acrylamide) gels containing photo-thermal agents in the interspace between the preformed non-responsive gels. Upon heating or near-infrared (NIR) light irradiation, the composite hydrogels with heterogeneous structures showed programmed bending, folding, and twisting deformations. Localized actuation or step-wise deformations were achieved by selective or sequential irradiations of NIR light on the specific regions of the composite hydrogels. This strategy should be suitable for other photo-responsive hydrogels with potential applications in diverse fields.

Graphical abstract: Thermo- and photo-responsive composite hydrogels with programmed deformations

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Publication details

The article was received on 02 Nov 2018, accepted on 03 Dec 2018 and first published on 04 Dec 2018


Article type: Communication
DOI: 10.1039/C8TB02896F
Citation: J. Mater. Chem. B, 2019, Advance Article
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    Thermo- and photo-responsive composite hydrogels with programmed deformations

    Z. J. Wang, C. Y. Li, X. Y. Zhao, Z. L. Wu and Q. Zheng, J. Mater. Chem. B, 2019, Advance Article , DOI: 10.1039/C8TB02896F

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