Coaxial Flow Mixing for Scalable Lipid Nanoparticle Encapsulation
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Solution Overview
Problem
Conventional mixing devices, such as tee mixer-type connectors, are inadequate for high-throughput and large-scale production of lipid nanoparticles used in RNA or DNA-based gene therapies or vaccines, as they cannot maintain consistent mixing conditions necessary for effective encapsulation of RNA or DNA molecules in lipid nanoparticles.
Innovation Solution
A coaxial flow device with specific fluid path elements, including helical grooves or packed beds, creates controlled microenvironments for continuous mixing of nanoparticle precursor solutions, enabling scalable production of lipid nanoparticles with encapsulated payloads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional tee mixer-type connectors are used for mixing nanoparticle precursor solutions, then the device is simple and easy to operate, but the mixing consistency and encapsulation efficacy cannot be maintained at various production scales
Solution Approach 1:
The coaxial flow device employs nested tubes where an inner tube is positioned within an outer tube, with both tubes having outlets that face each other. This nested configuration enables controlled mixing of precursor solutions at different scales while maintaining consistent microenvironment conditions for nanoparticle formation, resolving the contradiction between mixing precision and device simplicity.
2Productivity
If conventional mixing devices are used, then the device complexity is low, but the productivity and throughput for large-scale production are insufficient
Solution Approach 1:
The coaxial flow device enables continuous mixing of nanoparticle precursor solutions through its dual-tube configuration with facing outlets. The continuous flow regime maintains consistent mixing conditions and microenvironment control, allowing for high-throughput large-scale production while preserving the simplicity of the device structure.
3Quantity of substance
If scale-up is performed using conventional mixers, then production volume increases, but the microenvironment conditions for nanoparticle formation become inconsistent
Solution Approach 1:
The coaxial flow device maintains consistent microenvironment conditions across different production scales by controlling flow parameters through the nested tube configuration. The device geometry and flow rates are adjusted to preserve the critical microenvironment characteristics for nanoparticle formation, enabling scale-up while maintaining composition stability.
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
The device ensures reproducible and continuous mixing at various scales, facilitating the production of lipid nanoparticles suitable for large-scale vaccine manufacturing by maintaining optimal conditions for encapsulation of RNA or DNA molecules.
Implementation Method 1
the fluid path elements include, arranged in the mixing portion, a disrupting physical element designed to cause formation of the microenvironments
Data Source
AI summary
The invention relates to a coaxial flow device 1 capable of creating comparable microenvironments at various operation scales through the continuous introduction and mixing of nanoparticle precursor solutions for the manufacturing of a dispersion comprising nanoparticles. According to the invention, the device includes first and second coaxial tubes 3, 5 for controlled flows of nanoparticle precursor solutions and a mixing portion 7, wherein a disrupting physical element 21 is arranged to cause formation of the microenvironments. Application to the production of mRNA vaccines.