Hydrocyclonic Flow Cell Nanoparticle Synthesis
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Solution Overview
Problem
Current microfluidic techniques for liposome synthesis face challenges in scaling up production throughput while maintaining control over nanoparticle size and reducing polydispersity, as larger geometries required for higher buffer and lipid flow rates lead to increased size variance and polydispersity.
Innovation Solution
The use of a hydrocyclonic flow cell with tangentially-directed and axially-directed flows creates a primary vortex for simultaneous flow focusing and mixing, allowing for the formation of nanoparticles with controlled sizes by adjusting the flow rates of the constituent flows, enabling high-throughput production of monodisperse liposomes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If microfluidic flow focusing or rapid mixing techniques are used to control nanoparticle size, then manufacturing precision is improved, but productivity deteriorates due to small microchannel dimensions and laminar flow requirements constraining throughput
Solution Approach 1:
The invention changes the flow configuration parameters from conventional axial-axial or axial-radial focusing to axial-tangential flow configuration, creating a vortex flow field that enables both high throughput and precise size control. The tangential flow rate and axial flow rate can be independently optimized to achieve desired particle sizes at high production rates
Solution Approach 2:
The invention introduces dynamic vortex flow that rotates and circulates within the microchannel, creating time-varying flow patterns that enhance mixing and focusing efficiency. This dynamic flow regime allows for higher throughput while maintaining narrow size distributions through continuous flow renewal and enhanced mass transport
2Productivity
If larger microchannel geometries are used to increase buffer and lipid flow rates for high throughput, then productivity is improved, but manufacturing precision deteriorates due to increased size variance and polydispersity
Solution Approach 1:
The invention employs hydraulic vortex flow generated by tangential inlet configuration, utilizing fluid dynamics principles to create rotational flow patterns that enhance focusing precision. The vortex flow creates centrifugal forces and secondary flows that improve mixing efficiency and size control independent of channel dimensions
Solution Approach 2:
The invention introduces a rotational dimension to the flow field by configuring the tangential inlet, transforming the conventional linear flow focusing into three-dimensional vortex flow. This additional rotational degree of freedom enables enhanced control over particle formation while accommodating higher flow rates
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
This approach achieves reliable liposome synthesis with narrow size distributions and high throughput, producing liposomes with diameters ranging from 61 nm to 127 nm and polydispersity indices ≤0.2, suitable for pharmaceutical applications, while maintaining precise control over vesicle size and reducing labor and infrastructure requirements.
Implementation Method 1
a tangentially-directed flow in a microfluidic flow cell generates a primary vortex surrounding an axially-directed flow
Implementation Method 2
The primary vortex subjects the axially-directed flow to simultaneous flow focusing and mixing
Implementation Method 3
Rapid mixing is achieved using periodic microstructures, such as a herringbone pattern, baffles, or toroidal or twisted microfluidic channels to generate localized chaotic advection at high flow velocity
Data Source
AI summary
A first inlet flow can be directed along an axial direction in a hydrocyclonic flow cell. The first inlet flow can include first constituent molecules. At a same time, one or more second inlet flows can be directed along a circumferential direction of the hydrocyclonic flow cell. Each second inlet flow can include a buffer solution. The first inlet flow can be subjected to flow focusing by a surrounding primary vortex formed by the one or more second inlet flows, so as to generate a flow comprising a plurality of nanoparticles at an outlet of the hydrocyclonic flow cell. Each nanoparticle can be formed by a respective plurality of the first constituent molecules.