Finite element analysis of ionic liquid gel soft actuator

He, Bin; Zhang, Chenghong; Ding, An

doi:10.1088/1674-1056/26/12/126102

Cited by 8 publications

(7 citation statements)

References 26 publications

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“…To apply the requirements of the mechanical performance model in the following work, the stresses in each direction of the model are supposed to be considered [ 16 , 17 ] (see Figure 5 ).…”

Section: Hyperelasticmentioning

confidence: 99%

Motion Simulation of Ionic Liquid Gel Soft Actuators Based on CPG Control

Zhang

Ding

et al. 2019

Computational Intelligence and Neuroscience

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The ionic liquid gel (ILG), a new type of soft actuator material, is a mixture of 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4), hydroxyethyl methacrylate (HEMA), diethoxyacetophenone (DEAP), and ZrO2 polymerized into a gel state under ultraviolet (UV) light irradiation. The soft actuator structure consists of a layer of ionic liquid polymer gel sandwiched between two layers of activated carbon capped with gold foil. The volume of the cationic BMIM+ in the ionic liquid BMIMBF4 is much larger than that of the anionic BF4−. When voltages are applied to both sides of the actuator, the anions and cations move toward the anode and cathode of the electrode, respectively, under the electric field. The volume of the ILG cathode side therefore expands, and the volume of the ILG anode side shrinks, hence bending the entire actuator toward the anode side. The Ogden model was selected as the hyperelastic constitutive model to study the mechanical properties of the ILG by nonlinear analysis. As the ILG is an ideal material for the preparation of a supercapacitor, the equivalent circuit of the ILG can be modeled by the supercapacitor theory to identify the transfer function of the soft actuator. The central pattern generator (CPG) control is widely used in the area of biology, and CPGs based on bioinspired control methods have attracted great attention from researchers worldwide. After the continuum soft actuator is discretized, the CPG-based bioinspired method can be used to control the soft robot drivers. According to the simulation analysis results, the soft actuator can be smooth enough to reach the specified location.

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“…To apply the requirements of the mechanical performance model in the following work, the stresses in each direction of the model are supposed to be considered [ 16 , 17 ] (see Figure 5 ).…”

Section: Hyperelasticmentioning

confidence: 99%

Motion Simulation of Ionic Liquid Gel Soft Actuators Based on CPG Control

Zhang

Ding

et al. 2019

Computational Intelligence and Neuroscience

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“…e polymer matrix is cross-linked into a porous network structure. ZrO 2 enhances the mechanical strength of the gel, and as the ZrO 2 content increases, the tensile strength of the ILG increases [9,10]. Figure 4 shows the soft actuator fabrication process.…”

Section: Preparation Of the Soft Actuatormentioning

confidence: 99%

Application and Analysis of an Ionic Liquid Gel in a Soft Robot

Zhang

Wang

et al. 2019

Advances in Materials Science and Engineering

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Due to their light weight, flexibility, and low energy consumption, ionic electroactive polymers have become a hotspot for bionic soft robotics and are ideal materials for the preparation of soft actuators. Because the traditional ionic electroactive polymers, such as ionic polymer-metal composites (IPMCs), contain water ions, a soft actuator does not work properly upon the evaporation of water ions. An ionic liquid polymer gel is a new type of ionic electroactive polymer that does not contain water ions, and ionic liquids are more thermally and electrochemically stable than water. These liquids, with a low melting point and a high ionic conductivity, can be used in ionic electroactive polymer soft actuators. An ionic liquid gel (ILG), a new type of soft actuator material, was obtained by mixing 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4), hydroxyethyl methacrylate (HEMA), diethoxyacetophenone (DEAP) and ZrO2 and then polymerizing this mixture into a gel state under ultraviolet (UV) light irradiation. An ILG soft actuator was designed, the material preparation principle was expounded, and the design method of the soft robot mechanism was discussed. Based on nonlinear finite element theory, the deformation mechanism of the ILG actuator was deeply analyzed and the deformation of the soft robot when grabbing an object was also analyzed. A soft robot was designed with the soft actuator as the basic module. The experimental results show that the ILG soft robot has good driving performance, and the soft robot can grab a 105 mg object at an input voltage of 3.5 V.

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“…The optical transmission behavior of the ionic liquid in an applied field is of great significance in promoting the application in the electro-optical regulation field. Room-temperature imidazole ionic liquid has received considerable attention in recent years because it can be substituted for volatile organic compounds and is widely used in synthesis, catalysis, electrochemistry, and optical physics [3][4][5][6] . The optical absorption properties have been studied by many researchers.…”

Section: Introductionmentioning

confidence: 99%

“…Room-temperature imidazole ionic liquid has received considerable attention in recent years because it can be substituted for volatile organic compounds and is widely used in synthesis, catalysis, electrochemistry, and optical physics [3][4][5][6] . The optical absorption properties have been studied by many researchers.…”

Section: Introductionmentioning

confidence: 99%

Light absorption coefficients of ionic liquids under electric field

Zhou¹,

Dong²,

Zhang³

et al. 2019

Chinese Phys. B

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Ionic liquids have attracted a lot of research attention for their applications in novel optoelectronic structures and devices as an optical means of regulating electricity. Although the electro-optic effect of ionic liquids is mentioned in some literatures, a quantitative testing and analysis is hardly found in light absorption coefficients of ionic liquids under electric field. In the present study, an experimental apparatus was designed to measure the absorption coefficients of ionic liquids under different electric fields. Five groups of imidazole ionic liquids were experimentally investigated and an inversion was performed to determine the spectral absorption coefficients of the imidazole ionic liquids under electric fields. Different intensities with multiple interface refractions and reflections were also considered, and the various measurement errors were analyzed through uncertainties propagation analysis. Spectral absorption of ionic liquids from 300 nm to 2500 nm was obtained and the absorption coefficients were retrieved. It was found that the absorption behavior of ionic liquids changed in some frequency bands under electric field. The experimental results showed that the absorption coefficient of the ionic liquid increases with the voltage at 1520 nm and 1920 nm. The change rate was affected by the types of anions and cations in the ionic liquid and the diffusion rate of the ions therein. This study provides illustrations for the ionic liquid-based electro-optical regulation in terms of physical property parameters and the testing technique.

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Finite element analysis of ionic liquid gel soft actuator

Cited by 8 publications

References 26 publications

Motion Simulation of Ionic Liquid Gel Soft Actuators Based on CPG Control

Motion Simulation of Ionic Liquid Gel Soft Actuators Based on CPG Control

Application and Analysis of an Ionic Liquid Gel in a Soft Robot

Light absorption coefficients of ionic liquids under electric field

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