Caterpillar‐Inspired Design and Fabrication of A Self‐Walking Actuator with Anisotropy, Gradient, and Instant Response

Li, Bin; Du, Tao; Yu, Bo; Gucht, Jasper van der; Zhou, Feng

doi:10.1002/smll.201500577

Cited by 55 publications

(53 citation statements)

References 43 publications

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“…(D) The evaporation-driven oscillatory engine [93] 题组在具有湿度响应的琼脂糖上排列不同取向的玻璃纤维, 制备出能调控弯曲方向的湿度响应驱动器 [53] (图 6C [54] . (B)环境湿度驱动下的自行走行为 [94] . (C)由 RGO/GO 薄膜制成的水响应的爬行机器人 [64] .…”

Section: (B)湿空气靠近驱动unclassified

“…(A) Unidirectional walking of a partially protected CNP film driven by fluctuations in ambient humidity [54] . (B) Self-walking of the device on the ratchet substrate driven by changing the environmental humidity [94] . (C) The moisture-responsive crawler robot made of RGO/GO film [64] .…”

Section: (D)侧面旋转式发mentioning

confidence: 99%

“…图 10 (A)在湿度作用下仿萝卜花的开放 [97] . (B)再现人体手指弯曲 [94] . (C)通过含羞草自闭合展示人工材料的定向闭合行为 [55] Figure 10 (A) Flower of turnip that blooms with adsorption of humidity [97] .…”

Section: (B)可形状转变的水mentioning

confidence: 99%

“…(C)通过含羞草自闭合展示人工材料的定向闭合行为 [55] Figure 10 (A) Flower of turnip that blooms with adsorption of humidity [97] . (B) Recreating of movements of the human fingers [94] . (C) Demonstration of directional self-organization via Mimosa Origami self-assembly [55] (5)其他最新进展: 驱动器膜的方向性调控智能材料是人们根据所要达到的目的, 预先设计好的能对外界环境刺激做出感应、使材料发生形状或其他特征变化的材料 [98,99] .…”

Section: (B)可形状转变的水mentioning

confidence: 99%

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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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Section: (B)湿空气靠近驱动unclassified

Section: (D)侧面旋转式发mentioning

confidence: 99%

Section: (B)可形状转变的水mentioning

confidence: 99%

Section: (B)可形状转变的水mentioning

confidence: 99%

See 2 more Smart Citations

Research Progress of Solvent-based Smart Actuator Materials

Zhang¹,

Liu²,

Chen³

et al. 2018

Acta Chim. Sinica

View full text Add to dashboard Cite

show abstract

“…During this process, a mechanical deformation takes place, with the goal to perform a desired function such as directed complex motions. [28][29][30][31] A universal strategy is the use of polymer films, which can undergo reversible water-sorption-induced swelling for actuation. Due to the environment-friendly nature of water vapor and its easy accessibility, moisture-responsive materials are promising candidates for broad applications, for example, sensors, [21] actuators, [22][23][24][25][26][27] or construction of soft robots.…”

mentioning

confidence: 99%

Sensitively Humidity‐Driven Actuator Based on Photopolymerizable PEG‐DA Films

Xia

Shi

et al. 2017

Adv Materials Inter

108

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Hydrogels such as poly(ethylene glycol) diacrylate are a class of cross-linked polymers that have the ability to absorb water and change volume. Here, a humidity responsiveness of hydrogel film fabricated by the photopolymerization of poly(ethylene glycol) diacrylate (PEG-DA) monomer is reported. This kind of film could be driven by a small humidity gradient, thus spontaneous deformation and motion can be achieved by placing the film onto a moist filter paper. The influence factors of humidity response sensitivity such as the exposure time and number-average molecular weight of PEG-DA monomer used during the fabrication are investigated. Under different relative humidity, the film displays different degrees of pink color Citation tools Go To

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Bioinspired Superhydrophobic Papillae with Tunable Adhesive Force and Ultralarge Liquid Capacity for Microdroplet Manipulation

Tan

Chu

et al. 2019

Adv Funct Materials

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Template‐free, highly efficient, and large‐area construction of complex multiscale architectures is still a great challenge for microfabrications. Inspired by the hierarchical micropapillae on the superhydrophobic surface of natural rose petals, here, a facile 3D shrinking method is reported to build a graphene oxide (GO) papillae array. Circular GO speckles with a gradient of thickness are deposited on an inflated latex balloon through the water‐evaporation‐driven assembly of GO nanosheets, which then shrink into hierarchical papillae under compressive stresses upon deflation. The fluoroalkylsilane modified GO papillae array exhibits a combined performance of strong superhydrophobicity (CA > 170°), tunable adhesive force (39.2–129.4 µN), and ultralarge liquid capacity (25 µL). The wetting states (Wenzel, Cassie‐I, and Cassie‐Baxter), the adhesive forces, and the liquid capacities all can be tuned by varying the buckling topography (microwrinkle or microfold), the papillae number (3, 4, 6, or 7), and the array arrangement (triangle, square, or hexagon). For one single papillae, the highest adhesive force and the highest liquid capacity incresed to a record breaking value of 26.5 µN and 4.2 µL, respectively, which are promising for programmable manipulations of microdroplets and relevant for multistep microreactions.

show abstract

Caterpillar‐Inspired Design and Fabrication of A Self‐Walking Actuator with Anisotropy, Gradient, and Instant Response

Cited by 55 publications

References 43 publications

Research Progress of Solvent-based Smart Actuator Materials

Research Progress of Solvent-based Smart Actuator Materials

Sensitively Humidity‐Driven Actuator Based on Photopolymerizable PEG‐DA Films

Bioinspired Superhydrophobic Papillae with Tunable Adhesive Force and Ultralarge Liquid Capacity for Microdroplet Manipulation

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