Photodeformable Liquid Crystalline
Polymers (LCPs)
13
Lang Qin, Wei Gu, and Yanlei Yu
Contents
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362
Photodeformation Based on Photochemical Phase Transition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362
Photodeformation Driven by Visible and NIR Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371
Photodeformation Based on Photothermal Effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375
Soft Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378
Macroscaled Actuators . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 378
Microscaled Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 381
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 384
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388
Abstract
Collecting and amplifying the nanoscopic molecular motions into macroscopic
deformation are the basic properties of crosslinked liquid crystalline polymers
(CLCPs), which can even directly transfer input light energy into mechanical
work when combined with photochromophores, thus fascinating many scientists.
This article reviews the macroscopic and microscopic deformation of photoresponsive CLCPs based on photochemical phase transition and photothermal
effect. In addition, we highlight some new methods to trigger the deformation
driven by visible and infrared light instead of ultraviolet one, such as chemical
modification of azobenzene and addition of upconversion materials.
L. Qin · W. Gu · Y. Yu (*)
Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers,
Fudan University, Shanghai, People’s Republic of China
e-mail: 13110300003@fudan.edu.cn; 14210300020@fudan.edu.cn; ylyu@fudan.edu.cn
© Springer Nature Switzerland AG 2020
L. Zhu, C. Y. Li (eds.), Liquid Crystalline Polymers, Polymers and Polymeric
Composites: A Reference Series, https://doi.org/10.1007/978-3-030-43350-5_52
361
Polymers (LCPs)
13
Lang Qin, Wei Gu, and Yanlei Yu
Contents
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362
Photodeformation Based on Photochemical Phase Transition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362
Photodeformation Driven by Visible and NIR Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371
Photodeformation Based on Photothermal Effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375
Soft Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378
Macroscaled Actuators . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 378
Microscaled Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 381
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 384
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388
Abstract
Collecting and amplifying the nanoscopic molecular motions into macroscopic
deformation are the basic properties of crosslinked liquid crystalline polymers
(CLCPs), which can even directly transfer input light energy into mechanical
work when combined with photochromophores, thus fascinating many scientists.
This article reviews the macroscopic and microscopic deformation of photoresponsive CLCPs based on photochemical phase transition and photothermal
effect. In addition, we highlight some new methods to trigger the deformation
driven by visible and infrared light instead of ultraviolet one, such as chemical
modification of azobenzene and addition of upconversion materials.
L. Qin · W. Gu · Y. Yu (*)
Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers,
Fudan University, Shanghai, People’s Republic of China
e-mail: 13110300003@fudan.edu.cn; 14210300020@fudan.edu.cn; ylyu@fudan.edu.cn
© Springer Nature Switzerland AG 2020
L. Zhu, C. Y. Li (eds.), Liquid Crystalline Polymers, Polymers and Polymeric
Composites: A Reference Series, https://doi.org/10.1007/978-3-030-43350-5_52
361