Electrospinning Apparatus with Common Electrode for Scalable Nanofiber Production
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current electrospinning techniques face challenges in large-scale production due to the complexity of controlling electrical fields and delivering polymer solutions to multiple needles, which limits the scalability and efficiency of nanofiber production.
Innovation Solution
A novel apparatus and method that utilize a common electrode and multiple extrusion elements within an enclosure to apply a uniform electric field, allowing for simultaneous extrusion and electrospinning of fibers, thereby simplifying control and increasing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple needles are used to increase production capacity, then productivity increases, but device complexity increases due to the need to control electrical fields and deliver polymer solutions to each needle individually
Solution Approach 1:
The patent combines multiple extrusion elements into a single integrated spray head assembly with a common polymer solution reservoir and unified electrical field control. Multiple capillaries are bundled together and connected to a single high-voltage electrode, eliminating the need for separate control systems for each needle while maintaining high production capacity through parallel fiber formation from multiple capillary outlets.
Solution Approach 2:
The spray head assembly serves multiple functions simultaneously: it acts as a structural support for multiple capillaries, a common reservoir for polymer solution distribution, a unified electrical field generator, and a multi-output fiber production station. This multi-functional design reduces the number of separate components and control systems needed.
2Productivity
If traditional electrospinning with individual needles is used, then fiber quality control is achievable, but manufacturing efficiency is limited due to sequential processing
Solution Approach 1:
The spray head incorporates multiple individual capillaries within a unified structure, allowing each capillary to function as an independent fiber formation channel while being part of a collective assembly. This segmentation enables parallel production of fibers with consistent quality control, as each capillary can be precisely engineered with controlled dimensions while the overall assembly achieves high 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 mass production of fibers and nanofibers with improved control over fiber diameter and quality, overcoming the limitations of traditional methods by reducing the complexity of controlling electric fields and enhancing the efficiency of the electrospinning process.
Implementation Method 1
A common electrode and multiple extrusion elements within an enclosure apply a uniform electric field
Implementation Method 2
The phenomenon of electrospray involves the formation of a droplet of polymer melt at an end of a needle, the electric charging of that droplet, and an expulsion of parts of the droplet because of the repulsive electric force due to the electric charges
Implementation Method 3
A jet of the polymer is drawn from the tip toward the electrode by the electric field, and dries during flight from the needle to the electrode to form polymeric fibers
Data Source
AI summary
Apparatus and method for producing fibrous materials in which the apparatus includes an enclosure having an inlet configured to receive a substance from which the fibrous materials are to be composed, a common electrode disposed in the enclosure, and plural extrusion elements provided in a wall of the enclosure opposite the common electrode so as to define between the plural extrusion elements and the common electrode a space in communication with the inlet to receive the substance in the space. In the method, a substance from which the fibrous materials are to be composed is fed to the enclosure having the plural extrusion elements, a common electric field is applied to the extrusion elements in a direction in which the substance is to be extruded, the substance is extruded through the extrusion elements to tips of the extrusion elements, and the substance is electrosprayed from the tips to form the fibrous materials.