Electrospinning Emitter Array for High-Throughput Fluid Processing
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Solution Overview
Problem
Existing electrospinning and electrospraying systems face challenges in increasing throughput while maintaining consistent properties of emitted fluids, as scaling up often results in deterioration of fluid properties such as size and shape.
Innovation Solution
The use of an emitter array with a high density of protrusions, each featuring microstructures arranged in an ordered fashion, allows for simultaneous emission of fluid in continuous streams from multiple protrusions, maintaining consistent properties and enabling high-throughput fluid processing at low voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of protrusions is increased to improve throughput, then productivity increases, but the consistency of emitted fluid properties deteriorates
Solution Approach 1:
The emitter is divided into multiple independent protrusions, each capable of emitting fluid separately. This segmentation allows parallel processing of multiple fluid streams, increasing throughput while maintaining the ability to control each protrusion's emission independently to preserve property consistency.
Solution Approach 2:
Each protrusion is equipped with specific microstructures (such as conical shapes, grooves, or textured surfaces) that are optimized for local fluid emission control. These localized structural features ensure that each protrusion maintains consistent emission characteristics even when operating in parallel, thereby preserving fluid property uniformity across the entire array.
2Productivity
If the density of protrusions is increased to improve throughput, then productivity increases, but the control over fluid flow becomes more difficult
Solution Approach 1:
The high-density protrusion array is designed with sufficient spacing and structural independence between adjacent protrusions. This segmentation allows each protrusion to be controlled individually through separate fluid supply channels or independent voltage application, maintaining ease of operation despite increased density and throughput capability.
Solution Approach 2:
The microstructures on each protrusion (such as cone angles, groove dimensions, or surface textures) are precisely controlled within specific parameter ranges to optimize fluid emission characteristics. By standardizing these geometric parameters across all protrusions, the system achieves both high density and uniform controllability, allowing consistent fluid flow management across the entire array.
3Manufacturing precision
If a single protrusion is used to maintain fluid property consistency, then manufacturing precision is maintained, but productivity is limited
Solution Approach 1:
Multiple protrusions with identical or similar microstructures are merged into a single integrated emitter body. Each protrusion maintains the same design characteristics as a single-protrusion emitter, ensuring consistent fluid properties, while their combined operation in parallel achieves high throughput. The merging is facilitated by a common substrate or support structure that holds all protrusions in precise alignment.
Solution Approach 2:
The system transitions from a single-point emission (zero-dimensional) to a multi-point array emission (two-dimensional spatial distribution). By arranging multiple protrusions in a planar or three-dimensional array configuration, the system maintains the emission quality of a single protrusion while exploiting the parallelism of multiple emission points to dramatically increase overall productivity and throughput.
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 enables the production of fluid streams and droplets with small dimensions simultaneously from multiple protrusions, maintaining uniformity and efficiency, and allows for the control of fluid flow rates to achieve desired properties, such as small cross-sectional dimensions and low voltage operation.
Implementation Method 1
Application of a sufficiently high voltage results in electrostatic repulsion within components of the liquid. The electrostatic repulsion counteracts the surface tension of the liquid, and a stream of liquid erupts from the surface.
Implementation Method 2
The electrostatic repulsion counteracts the surface tension of the liquid, and a stream of liquid erupts from the surface.
Implementation Method 3
a voltage is applied to a liquid (usually free of polymer, in contrast to many electrospinning applications) to produce ions and/or small droplets of charged liquid. In many such electrospraying systems, when the liquid is fed to the tip of the emitting protrusion and the voltage is applied, varicose waves on the surface of the resulting liquid jet lead to the formation of small and highly charged liquid droplets, which are radially dispersed due to Coulomb repulsion.
Data Source
AI summary
Systems and methods in which the flow of fluid is electrically driven, including electrospinning and electrospraying systems and methods, are generally described.