Humidity‐ and Photo‐Induced Mechanical Actuation of Cross‐Linked Liquid Crystal Polymers

Liu, Yuyun; Xu, Bo; Sun, Shengtong; Jia, Wei; Wu, Limin; Yu, Yanlei

doi:10.1002/adma.201604792

Cited by 236 publications

(189 citation statements)

References 47 publications

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“…[1,2] So far, several approaches, including the usage of electrowetting defects and the magnetic force, have successfully demonstrated the manipulation of droplets on an open surface. [6][7][8][9][10][11][12] For example, Ichimura et al achieved the remote light manipulation of liquids on an open surface modified with a photoresponsive azobenzene monolayer. [3][4][5][6][7][8][9] Compared to other stimuli, light allows a precise and remote control that can be regulated by tunable intensities and wavelengths, providing an alternative tool for the liquid manipulation.…”

Section: Doi: 101002/admi201901158mentioning

confidence: 99%

“…Interfaces 2019, 6,1901158 with other types of photoresponsive surfaces, the azobenzenecontaining LLCP showed a much larger and faster change of wettability behavior, which is beneficial to develop more intelligent and amusing devices. Mater.…”

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

“…Interfaces 2019, 6,1901158 varied for the purpose of obtaining requirement-meeting fiber films. Mater.…”

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

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Directed Pinning of Moving Water Droplets on Photoresponsive Liquid Crystal Mats

Liu

Zhu

Zhao

et al. 2019

Adv Materials Inter

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Compared to conventional continuous‐flow liquid manipulation, the direct control of liquid droplets on an open surface prevents the potential cross contamination during liquid transfer, which is advantageous for biological microliquids. However, the fabrication techniques of smart surfaces and the fast manipulation of droplets remotely remain difficult, limiting its practical application. Herein, large‐scaled photoresponsive superhydrophobic mats fabricated by the electrospinning of linear liquid crystal polymer are presented. Upon the alternated irradiation of UV–vis light, these mats exhibit significant, fast, and reversible change of adhesion, while their surfaces maintain the superhydrophobicity. Therefore, the water droplets can be pinned at any directed point on the mat surface after the fast superhydrophobic adhesion switch by the remote control of light. It is expected that the active manipulation of discrete droplets on an open surface through these photoresponsive mats provides a new concept for microdroplet manipulation, allowing for minimal reactions among biological samples.

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Section: Doi: 101002/admi201901158mentioning

confidence: 99%

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

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Directed Pinning of Moving Water Droplets on Photoresponsive Liquid Crystal Mats

Liu

Zhu

Zhao

et al. 2019

Adv Materials Inter

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“…中国科学院理化技术研究所王树涛课题组 [86] 制备出水油凝胶 Janus 膜(如图 8B 所示), 图 8 信号转换. (A)交联液晶聚合物(CLCP)膜双模式传感器, 当水分感应和紫外光感应时不同颜色的灯会亮起来 [77] .…”

Section: (D)侧面旋转式发unclassified

“…(C) 整齐排列的 MWCNT/PTP 复合膜液体微型阀示意图(左)和实验图(右) [96] Figure 8 Signal transformation. (A) a dual-mode sensor which was assembled by a CLCP film coated with conductive materials and two LED lights of different colors [77] . (B) Smart sensor for solvents leakage detection [86] .…”

Section: (B)可形状转变的水mentioning

confidence: 99%

Research Progress of Solvent-based Smart Actuator Materials

Zhang¹,

Liu²,

Chen³

et al. 2018

Acta Chim. Sinica

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Recently, smart actuator materials have drawn widespread research attention due to their important applications in soft robots, artificial muscles, sensors, or micro hand device preparation. In nature, there are many examples of actuator materials. For example, sea cucumbers can alter the stiffness of their dermis within seconds to obtain survival advantages and the venus flytrap can close their leaves in a second for efficient prey capture. Pinecones and flowers respond to their environment by opening and closing with the relative humidity changes. Inspired by these natural creatures, synthetic polymer microactuators such as polymer hydrogels and polymer composites are widely developed due to their important applications based on their response to external stimuli, such as light, heat, electronic, magnetic, solvent and humidity. In this work, we review the research progress of solvent-based smart actuator materials. There are mainly two kinds of solvent-actuator based on the fabrication method and actuator mechanism: one is a two-layer structure membrane formed by active layers-support layers with different expansion coefficients. The active layer is volumetrically expanded under the action of a solvent, and the support layer is a passive holder. The other is made of rigid material skeleton with a flexible material to make a single-layer composite membrane filler. The ionic gradient or the pore structure gradient of the material itself gives rise to the directional driving behavior with a varying solvent binding gradient. Otherwise, the membrane's bending drive behavior has been achieved by inducing a single material to form an infiltration gradient by a solvent infiltration process. Solvent-based smart actuator materials are prepared by introducing moisture or solvent-responsive molecules in a polymeric material to form a bilayers or monolayer structure. The material is distorted by volume deformation due to humidity or solvent field action. At present, a great deal of research work has been devoted to converting the mechanical deformation of solvent-based smart actuator materials into electric energy and developing related intelligent application in energy transformation, liquid switching, biomimicry, transportation of liquids and smart sensing. The paper presents a pioneering outlook for the further development of the solvent actuator materials.

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Humidity‐ and Photo‐Induced Mechanical Actuation of Cross‐Linked Liquid Crystal Polymers

Cited by 236 publications

References 47 publications

Directed Pinning of Moving Water Droplets on Photoresponsive Liquid Crystal Mats

Directed Pinning of Moving Water Droplets on Photoresponsive Liquid Crystal Mats

Research Progress of Solvent-based Smart Actuator Materials

Getting Things Moving

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