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An Additive Manufacturing Technique for the Facile and Rapid Fabrication of Hydrogel-based Micromachines with Magnetically Responsive Components
Published on: July 18, 2018
Electrically-driven hydrogel actuators in microfluidic channels: fabrication, characterization, and biological
Gu Han Kwon1, Yoon Young Choi, Joong Yull Park
1Department of Biomedical Engineering, College of Health Science, Korea University, Seoul 136-703, Republic of Korea. dbiomed@korea.ac.kr
Lab on a Chip
|April 9, 2010
Summary
Electroactive hydrogel devices overcome limitations in smart materials for cell biology applications. This microfluidic system sorts cells and maintains their pluripotency and differentiation capabilities.
Area of Science:
- Biomaterials Science
- Microfluidics
- Cell Biology
Background:
- Electro-responsive smart materials face challenges like bubble generation and biocompatibility issues, limiting their use.
- Traditional hydrogel actuators often require high driving voltages, leading to hydrolysis and performance degradation.
Purpose of the Study:
- To design and validate a novel microfluidic device utilizing electroactive hydrogels for cell sorting.
- To address limitations of bubble generation and biocompatibility in electro-responsive materials for biological applications.
Main Methods:
- Developed a microfluidic channel with an integrated electroactive hydrogel actuator using 4-hydroxybutyl acrylate (4-HBA).
- Characterized hydrogel properties (actuating behavior, bending force, elasticity) and optimized for low driving voltages (<1.2 V) to prevent bubble generation.
- Assessed device performance by sorting oil droplets and subsequently sorting mouse embryoid bodies (mEBs) by size in cell culture media.
Main Results:
- The electroactive hydrogel actuator operated effectively at low voltages, preventing bubble generation.
- The microfluidic device successfully sorted droplets and mouse embryoid bodies (mEBs) by size.
- Sorted mEBs retained pluripotency and differentiated into endoderm, mesoderm, and ectoderm, confirming biocompatibility.
Conclusions:
- The integrated electroactive hydrogel microfluidic system offers a viable solution for overcoming limitations in smart material applications.
- This technology demonstrates practical utility in cell biology, enabling precise sorting and maintaining cell viability and differentiation potential.
- The developed device showcases the potential of advanced hydrogel materials in microfluidic cell manipulation and analysis.
