Parallel Microfluidic Chip for High-Throughput Microgel Synthesis
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Solution Overview
Problem
Existing methods for forming microgels suffer from slow output and inefficiencies, limiting their application in biomedical fields due to lack of uniform physiochemical properties and high throughput capabilities.
Innovation Solution
A microgel generator system comprising a continuous phase fluid inlet, dispersed phase fluid inlet, exposure lanes, flow focusing generators, and a radiation source for on-chip UV polymerization, allowing for the formation of uniform microgel particles with tunable mechanical properties by controlling exposure time and flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing methods for forming microgels are used, then microgel particles can be produced, but the output rate is slow and production efficiency is low
Solution Approach 1:
The invention divides a single microgel production process into multiple parallel microfluidic channels (e.g., 4080 channels on a single chip), allowing simultaneous formation of numerous microgel particles. This segmentation enables the system to produce microgels at ultra-high throughput while maintaining uniform physiochemical properties through precise control of each individual channel.
2Manufacturing precision
If existing microgel formation methods are used, then microgels can be produced, but uniformity of physiochemical properties is poor
Solution Approach 1:
The invention employs precise control of physical and chemical parameters including flow rates, crosslinker concentrations, and UV irradiation dosages across all parallel channels. By maintaining consistent parameter settings throughout the microfluidic device, the system achieves uniform microgel properties (size, stiffness, porosity) while producing large quantities simultaneously.
3Adaptability or versatility
If existing methods are used, then microgel production can proceed, but mechanical properties cannot be effectively tuned
Solution Approach 1:
The invention incorporates dynamic control capabilities that allow real-time adjustment of flow rates, crosslinking conditions, and irradiation parameters during microgel production. This dynamic control enables the system to tune mechanical properties (stiffness, elasticity) of microgels on-demand without requiring complex external equipment, as all adjustments are made through the integrated microfluidic platform.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Achieves ultra-high throughput synthesis of microgels with improved uniformity and tunable mechanical properties, enabling scalable production for biomedical applications such as drug delivery and tissue engineering.
Implementation Method 1
a radiation source, the radiation source configured to illuminate at least a portion of the exposure lanes so as to effect curing of polymer comprised in microdroplets disposed in the exposure lanes
Data Source
AI summary
Hydrogel particles (microgels) generated using microfluidic methods have superb properties such as high size uniformity and precise control over degradation and release profiles, making them useful for applications in wound healing and injectable drug delivery. However, the throughput of microfluidics is constrained by the physics governing the flow of immiscible fluids confined within microchannels. This throughput tends to be several orders of magnitude lower than what would be necessary for commercial and clinical applications. Here, we demonstrate the scaling up of on-chip synthesis of microgels by parallelizing the microfluidic channels. Taking advantage of the established fabrication technologies developed by the semiconductor industry and a high flow control system, a 4-inch silicon microfluidic chip integrating more than 4,000 microfluidic devices is developed. By incorporating a high energy flood UV source, this chip allows the synthesis of poly (ethylene glycol) diacrylate microgel particles with diameter down to 30 m at a throughput above Ikg/hr. By using photomasks that enable milli-second scale control of the UV exposure, the stiffness of microgels can be varied.