This novel technology utilizes a membrane that separates two fluid compartments, where precision-engineered recesses and thinner sections foster microbubble entrapment. When driven by high-frequency oscillations generated by a piezoelectric actuator within a range of 100 Hz to over 1 kHz, the trapped bubbles produce microstreaming that disrupts the laminar boundary layer, enhancing mass transfer. Fabricated using advanced photolithography, the membrane features a 21 µm thick PDMS structure with a 1 µm Parylene C release layer, and experimental validations using CO2-saturated water have confirmed its efficient gas and mass exchange capabilities. The system offers flexible configurations to suit applications requiring direct or indirect fluid contact.
Description
This technology stands apart due to its unique combination of engineered membrane features and controlled oscillatory dynamics, which effectively overcome limitations in conventional mass transfer systems. The meticulous design, including microscopic recesses (200 µm diameter by 17 µm deep) and high-frequency actuation, ensures superior performance in various applications such as medical devices, fuel cells, and dialyzers. Its ability to enhance efficiency without compromising size or increasing operational risks marks a significant advancement in membrane-based mass transfer solutions.
Applications
- Artificial lung gas exchange
- Fuel cell mass transfer
- Dialysis efficiency improvement
- Membrane filtration enhancement
- Desalination performance optimization
Advantages
- Enhanced gas and mass transfer efficiency by disrupting laminar boundary layers through microstreaming effects.
- Precise control over oscillation and bubble dynamics using engineered membrane features.
- Versatile configurations that allow for effective mass transfer with or without direct bubble contact.
- Broad applicability in critical areas such as artificial lungs, fuel cells, and filtration systems.
- Potential for miniaturization and improved device portability due to efficient design and advanced fabrication techniques.
IP Status
https://patents.google.com/patent/US20190022294A1
