Investigation on Microliter Free Jetting Using a Piezoelectric Micro Pump

Anne Zimmermann, Anne Zimmermann, Jasmin Podlech, Daniel Anheuer, Christian Wald

2025

Abstract

By avoiding any interaction with surfaces, especially free jetting of liquid pharmaceuticals has numerous advantages such as no cross-contamination of substances, less waste in pipetting, or the possibility of needle-free subcutaneous injections. Dispensing a defined amount of a liquid into air without surface contact requires the formation of a free jet. Therefore, jet generation by a micro pump presents a solution which is versatile in jet volumes while providing minimal dimensions. Jetting is achieved by the quick actuation of the piezoelectric actuator on the pump, leading to the ejection of a volume package that is fast enough to overcome the surface tension at the outlet’s interface, for example a dosing needle. Size and formation of the jet are controlled by matching the micro pump’s driving parameters such as peak-to-peak voltage and signal waveform. The feasibility of this setup is tested as well as parameters optimized for free jetting aqueous solution. Furthermore, the influence of different actuation parameters on the dosing precision is evaluated. A rectangular signal with 250 Hz sine flanks is determined as suitable waveform for the jet generation with the evaluated 20 mm stainless steel micro pump. Simultaneously, varying and matching the amount of pump strokes and voltage amplitude results in adjustable dosing volumes.

Paper Citation

in Harvard Style

Zimmermann A., Podlech J., Anheuer D. and Wald C. (2025). Investigation on Microliter Free Jetting Using a Piezoelectric Micro Pump. In Proceedings of the 18th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 1: BIODEVICES; ISBN 978-989-758-731-3, SciTePress, pages 113-118. DOI: 10.5220/0013112800003911

in Bibtex Style

@conference{biodevices25,
author={Anne Zimmermann and Jasmin Podlech and Daniel Anheuer and Christian Wald},
title={Investigation on Microliter Free Jetting Using a Piezoelectric Micro Pump},
booktitle={Proceedings of the 18th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 1: BIODEVICES},
year={2025},
pages={113-118},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0013112800003911},
isbn={978-989-758-731-3},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 18th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 1: BIODEVICES
TI - Investigation on Microliter Free Jetting Using a Piezoelectric Micro Pump
SN - 978-989-758-731-3
AU - Zimmermann A.
AU - Podlech J.
AU - Anheuer D.
AU - Wald C.
PY - 2025
SP - 113
EP - 118
DO - 10.5220/0013112800003911
PB - SciTePress