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Published on: July 11, 2011
Micromixer driven by bubble-induced acoustic microstreaming for multi-ink 3D bioprinting
Mitsuyuki Hidaka1, Masaru Kojima1, Shinji Sakai1
1Division of Chemical Engineering, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka, Japan. sakai@cheng.es.osaka-u.ac.jp.
This study introduces acoustic stimulation for efficient, gentle mixing of multiple viscous bioinks in 3D bioprinting. The novel bubble micromixer technology enhances mixing efficiency while preserving cell viability for tissue engineering applications.
Area of Science:
- Biotechnology
- Materials Science
- Mechanical Engineering
Background:
- 3D bioprinting is crucial for tissue engineering and drug screening, but efficient mixing of viscous bioinks remains a challenge.
- Current methods often lack the mild conditions required for preserving cell viability and bioink integrity.
Purpose of the Study:
- To develop a novel micromixing technology for 3D bioprinting using acoustic stimulation.
- To optimize nozzle design and acoustic parameters for efficient and gentle mixing of multiple bioinks.
Main Methods:
- Utilized acoustic microstreaming generated by bubble oscillations within a 3D bioprinting nozzle.
- Determined optimal bubble trapping hole design, arrangement, and voltage for maximal mixing efficiency.
- Developed and tested a novel nozzle design for homogeneous bioink mixing during printing.
Main Results:
- Achieved a four-fold increase in mixing efficiency compared to single bubble arrangements.
- Demonstrated over 80% mixing efficiency for sodium alginate solutions using the proposed nozzle.
- Maintained high cell viability (88%) after printing, indicating no adverse effects from acoustic stimulation.
Conclusions:
- Acoustic stimulation via a bubble micromixer offers a gentle yet effective solution for multi-ink mixing in 3D bioprinting.
- This technology has the potential to expand the applications of 3D bioprinting, especially for creating complex functional structures.
- The study presents the first application of bubble micromixers in 3D bioprinting, paving the way for advanced biofabrication techniques.
