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Published in:
Progress and Current Status of Materials and Properties of Soft Actuators Read chapter Read first chapter

2019 | OriginalPaper | Chapter

17. Spiropyran-Functionalized Hydrogels

Authors : Kimio Sumaru, Toshiyuki Takagi, Shinji Sugiura, Toshiyuki Kanamori

Published in: Soft Actuators

Publisher: Springer Singapore

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Abstract

Photoresponsive actuators composed of a hydrogel functionalized with spiropyran are described. The hydrogel exhibits drastic shrinking in rapid response to blue light irradiation in acidic aqueous systems and is examined for the application of several photoresponsive actuator systems. Rodlike hydrogel bends drastically after 1 s light irradiation, and microrelief is formed instantly on the hydrogel sheet by the micropatterned light irradiation. Based on these characteristics of the hydrogel, a photo-controllable microfluidic system is constructed with a hydrogel sheet, and the microchannels with arbitrary width, height, and pathway are formed instantly by the micropatterned light irradiation. Also independent and parallel control of microvalve array by local light irradiation is demonstrated for a similar microfluidic system combined with fixed microchannel.

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previous chapter Thermal and Electrical Actuation of Liquid Crystal Elastomers/Gels
next chapter Photomechanical Energy Conversion with Cross-Linked Liquid-Crystalline Polymers
Literature
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Metadata
Title
Spiropyran-Functionalized Hydrogels
Authors
Kimio Sumaru
Toshiyuki Takagi
Shinji Sugiura
Toshiyuki Kanamori
Copyright Year
2019
Publisher
Springer Singapore
Book
Soft Actuators

Print ISBN: 978-981-13-6849-3

Electronic ISBN: 978-981-13-6850-9

Copyright Year: 2019

DOI
https://doi.org/10.1007/978-981-13-6850-9_17

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