Peristaltic micropump using polyvinyl chloride gels with micropatterned surface

Motohashi, Tomoki; Ogawa, Naoki; Akai, Hideko; Shintake, Jun

doi:10.1038/s41598-022-27226-3

Cited by 7 publications

(6 citation statements)

References 30 publications

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“…Further, the maximum flow rate in the tested condition is 195.3 µL/min at 0.5 Hz. This value is comparable to or even higher than the values obtained in previous pumps 28 .…”

Section: Measurement Of Displacement and Flow Ratesupporting

confidence: 81%

“…For this reason, we measure the displacement as a function of the applied voltage as well as the flow rate of the pump. More specifically, the working principle of the pump is further detailed in our previous work 28 .…”

Section: Measurement Of Displacement and Flow Ratementioning

confidence: 99%

“…In our previous work 28 , we demonstrated peristaltic pumps using PVC gels. In those pumps, the surface of the gel had micro patterns that ensured the push and pull of a liquid.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Peristaltic pumps based on polyvinyl chloride gel actuator

Motohashi

Ogawa

Akai

et al. 2023

Electroactive Polymer Actuators and Devices (EAPAD) XXV

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Polyvinyl chloride (PVC) gel actuators, as an electroactive material, have promising features, such as large actuation strokes and fast response, generated with a simple structure at relatively low applied voltage. Hence, the effective exploitation of these features should enable pumps with high output performance and scalability. In this study, we present a peristaltic pump using PVC gel actuators. Specifically, the pump comprises three sets of rigid electrodes sandwiching a PVC gel membrane. Thus, applying a voltage to the electrodes leads to a deformation in the thickness direction. Consequently, this deformation squeezes a liquid below the membrane, resulting in a flow. Further, the sequential actuation of each electrode pair realizes peristaltic motion that generates a continuous flow of a liquid in one direction. In particular, we fabricated a pump using a PVC gel with a micro-patterned surface. More precisely, the surface pattern comprises 300 μm-base square pyramids (height 261 μm). Due to the relatively large surface pattern compared to the previous study, a large displacement in the thickness direction of ~110 μm was observed at a voltage of more than 500 V. Additionally, the maximum flow rate generated from the pump was 195.3 μL/min at 0.5 Hz. This value is comparable to or even higher than the values obtained in previous pumps that utilized PVC gel actuators.

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“…Further, the maximum flow rate in the tested condition is 195.3 µL/min at 0.5 Hz. This value is comparable to or even higher than the values obtained in previous pumps 28 .…”

Section: Measurement Of Displacement and Flow Ratesupporting

confidence: 81%

Section: Measurement Of Displacement and Flow Ratementioning

confidence: 99%

See 1 more Smart Citation

Peristaltic pumps based on polyvinyl chloride gel actuator

Motohashi

Ogawa

Akai

et al. 2023

Electroactive Polymer Actuators and Devices (EAPAD) XXV

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show abstract

“…K. H. Park et al [46][47][48][49] prepared a vibrotactile actuator based on wave-shaped PVC gel by casting method and applied it to wearable devices. Motohashi et al [50] prepared a kind of PVC gel by pressing the gel using heated iron plates and applied it to a peristaltic micropump. Obviously, different surface structures have different effects on the electrostatic force distribution and rigidity of the PVC gels, resulting in different deformation difficulties.…”

Section: Introductionmentioning

confidence: 99%

Dynamic braille display based on surface-structured PVC gel

Tian,

Yu,

et al. 2024

Smart Mater. Struct.

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Braille displays are a class of human-computer interaction electromechanical devices that display dynamic braille through an array of actuators. However, existing actuators for braille displays suffer from issues such as bulky size, heavy weight, and small tactile displacement, leading to difficulties in improving their resolution and readability. To address the above issues, we developed a novel electroactive artificial muscle actuator and applied it to braille displays. The novel actuator consists of a surface-structured PVC gel and planar electrodes. To investigate the effect of surface structure on the performance of novel PVC gel actuators, four types of surface-structured PVC gels were fabricated by a casting process, and their actuation performance was tested. The results show that the conical and frustum conical array structures are more favorable for improving the displacement of novel PVC gel actuators, while the cylindrical and quadrangular array structures are more favorable for improving their recovery forces. We observed both surface structure and dynamic electrical actuation, suggesting that the actuation of the novel actuator is mainly caused by the deformation of the surface structure of the array. We also analyzed electrowetting effects in PVC gels using the Lippmann-Young equation, to explain the differences in the performance of surface-structured PVC gels with different contact angles. Moreover, six multilayer actuators composed of PVC gels with a conical surface array structure are applied to the braille display unit to display the braille digits from 0 to 9. It has been shown that the novel PVC gel actuator has excellent mechanical properties, which makes it an ideal solution for braille displays.

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“…In recent decades, pumps based on smart materials have been extensively studied due to their * Author to whom any correspondence should be addressed. many advantages [1]. For example, piezoelectric materials have the characteristics of high-power density, fast response, and no interference from magnetic fields [2][3][4], and pumps based on piezoelectric materials have the advantages of simple and compact structure and low power consumption, which can be used in many occasions where ordinary electrohydraulic pumps cannot be replaced [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Design and development of a piezoelectric-hydraulic hybrid actuator with quarter-wavelength tubes

Zhang,

Qian,

Pan

et al. 2023

Smart Mater. Struct.

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The piezoelectric hydraulic actuator is a hybrid device consisting of a hydraulic pump driven by a piezoelectric stack connected to a hydraulic cylinder. For this type of piezoelectric actuator, the inertial force caused by the flow pulsation of the liquid will inhibit the movement of the piezoelectric vibrator and reduce its output performance. To solve these issues, two tubes were embedded into the piezoelectric-hydraulic hybrid actuation system for the first time to act as mechanical bandstop filters by interfering with the propagation of acoustic waves. The acoustic power transmission loss of the tube is derived from the one-dimensional wave equation. According to the experimental results, when the excitation frequency is close to the optimal operating frequency corresponding to the tubes, the liquid pulsation rate is reduced, the influence of inertial force on the actuator is weakened, and the output performance is relatively significantly improved. This strategy finally leads to a maximum no-load velocity of 153.5 mm/s and a maximum blocking force of 261.5 N for the hybrid actuator with 300 mm tubes; the maximum no-load velocity and blocking force of the hybrid actuator with 500 mm tubes are 94.45 mm/s and 230 N, respectively. Furthermore, this strategy can be used in other electrohydraulic actuators to enhance their capabilities.

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Peristaltic micropump using polyvinyl chloride gels with micropatterned surface

Cited by 7 publications

References 30 publications

Peristaltic pumps based on polyvinyl chloride gel actuator

Peristaltic pumps based on polyvinyl chloride gel actuator

Dynamic braille display based on surface-structured PVC gel

Design and development of a piezoelectric-hydraulic hybrid actuator with quarter-wavelength tubes

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