Design and Development of Piezoelectric Composite-Based Micropump

Revathi, S.; Padmanabhan, R.

doi:10.1109/jmems.2018.2870949

Cited by 22 publications

(8 citation statements)

References 30 publications

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“…As reported by many researchers in the past [26,37], the optimum diffuser angle should be 10 • . Revathi and Padmanabhan performed an analysis and confirmed that flow in diffusers with a ratio of L/W N (where, L is the diffuser length and W N is the nozzle width) equal to 15, falls in the vicinity of the line of the appreciable stall where there is minimal pressure loss and no reverse fluid flow [25]. Thus, the diffuser angle is set at 10 • and an aspect ratio (L/W N ) of 15 is maintained.…”

Section: Fabrication Procedures Of the 3d Printed Micropumpmentioning

confidence: 87%

“…Revathi et al reported in their study that nozzle/diffusers with an aspect ratio of 15 generated the maximum fluid flow rate. They fabricated a piezo-based micropump that exhibited a maximum flow rate of 11.34 µl min −1 at an operating frequency of 20 Hz [25]. Hwang et al performed a comparative study on thirteen different micropumps with varying nozzle/diffuser geometries.…”

Section: Introductionmentioning

confidence: 99%

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Design and development of a piezoelectric driven micropump integrated with hollow microneedles for precise insulin delivery

Datta

Biswas

Dhar

et al. 2023

J. Micromech. Microeng.

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A significant rise in diabetes has spurred researchers to develop more painless, patient-friendly, precise therapeutic products for insulin delivery. There is extensive use of valveless micropumps in numerous medical devices since they constitute the key component in the microsystem for fluid control and precision delivery. This study reports a novel integrated insulin delivery device consisting of a valveless piezoelectric-driven micropump, a hollow microneedle array, and a fluid reservoir. At first, a simple, low-cost micropump driven by a piezoelectric disc is fabricated using 3D printing technology. Nozzle/Diffuser elements are used instead of any active valves in order to avoid leakage and other complexities. To investigate the viability of the micropump, an analysis of the vibrational performance of the piezoelectric actuator is performed. COMSOL Multiphysics is used to perform the transient analysis of the piezoelectric actuator of the micropump. Further, simulation-based flow analyses are carried out to verify the outcomes of the experimental studies. The experimental results indicate that the maximum flow rate of the micropump is achieved at 400Hz for Insulin. To realize the final aim of this work, an array of hollow SU-8 microneedles is fabricated and then finally integrated with the piezoelectric-driven valveless micropump and fluid reservoir. This integrated insulin delivery device is tuneable and can achieve a maximum flow rate of 120.5 μL/min for insulin at 60V, 400Hz sine wave.

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Section: Fabrication Procedures Of the 3d Printed Micropumpmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Design and development of a piezoelectric driven micropump integrated with hollow microneedles for precise insulin delivery

Datta

Biswas

Dhar

et al. 2023

J. Micromech. Microeng.

View full text Add to dashboard Cite

show abstract

“…The rectification efficiency of the nozzle/diffuser is the ratio of the pressure loss coefficient in the contraction direction to the pressure loss coefficient in the diffusion direction [28]. For a single-layer pump chamber, the rectification efficiency of the microvalve can be expressed as:…”

Section: Working Principle and Structurementioning

confidence: 99%

Implantable double-layer pump chamber piezoelectric valveless micropump with adjustable flow rate function

Shen¹,

Guo²,

Ran³

et al. 2022

J. Micromech. Microeng.

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The piezoelectric valveless micropump with the characteristics of precise liquid delivery is widely utilized in the field of biomedicine. However, the improvement of the flow rate of the piezoelectric micropump relies on the increase in size and driving voltage, which hinders its application in the implantable medical field. This article proposes a double-layer chamber valveless piezoelectric micropump, which has the obvious advantages of small size and adjustable flow rate, and is expected to be applied to the treatment of implantable hydrocephalus. The overall size of the micropump is 10 mm × 10 mm × 4 mm, which can be implanted in the cerebral cortex. Combined with polydimethylsiloxane-polyethylene glycol terephthalate bonding technology, the double-layer chamber micropump solves the contradiction between miniaturization and large flow range. The flow rate generated by micropump under low voltage can be adjusted according to the amount of hydrocephalus. In order to reveal the mechanism of increasing the flow rate, the working efficiencies of the microvalve and micropump are studied in this article. The electric-solid-fluid coupling simulation and experimental tests obtained the optimal structural parameters: the divergence angle is 30°, the throat width is 300 μm, and the upper chamber depth is 100 μm. The proposed micropump can achieve the tunable flow rate of 2.16-51.74 μl min-1.

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“…Single-chamber piezoelectric pump has simple structure and is easy to control. Diffuser/nozzle piezoelectric pump (Revathi and Padmanabhan, 2018) is the main structure of single-chamber piezoelectric pump. Wang et al (2018) proposed a diffuser/nozzle piezoelectric pump with a ''virtual valve'' with the maximum flow rate of 5.4 mL/min.…”

Section: Introductionmentioning

confidence: 99%

Principle and structure of a multi-chamber piezoelectric pump with large flow rate integrated into printed circuit board

Peng

Wang

Tang

2022

Journal of Intelligent Material Systems and Structures

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Parametric simulation of multi-chamber piezoelectric pump proposed by authors shows that its flow rate is positively correlated with chamber compression ratio when height of chamber wall is not less than central deflection of circular piezoelectric unimorph actuator (CPUA). Therefore, in this paper, principle and structure of multi-chamber piezoelectric pump with novel CPUAs with three-layer structure are proposed and realized, so as to improve its chamber compression ratio, and then improve its flow rate. Its processing technology compatible with PCB processing technology is studied and its flow rate model is established. Central deflection of CPUA with three-layer structure and the flow rate characteristics are tested. Experimental results show that when the central deflection of CPUA with three-layer structure reaches the maximum value of 106.8 μm, the chamber compression ratio and flow rate of multi-chamber piezoelectric pump reach the maximum value of 50% and 3.11 mL/min, respectively. The maximum flow rate is increased by 622% compared to unimproved pump. By comparing experimental results with numerical and finite element simulation results, the realized multi-chamber piezoelectric pump has large flow rate and the established flow rate model can predict its flow rate.

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Design and Development of Piezoelectric Composite-Based Micropump

Cited by 22 publications

References 30 publications

Design and development of a piezoelectric driven micropump integrated with hollow microneedles for precise insulin delivery

Design and development of a piezoelectric driven micropump integrated with hollow microneedles for precise insulin delivery

Implantable double-layer pump chamber piezoelectric valveless micropump with adjustable flow rate function

Principle and structure of a multi-chamber piezoelectric pump with large flow rate integrated into printed circuit board

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