Electrostatic Nanofiber Spinning Cord Dynamics

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Solution Overview

Problem

Existing methods for producing nanofibers through electrostatic spinning face challenges such as rapid degradation of polymer solutions, uneven fiber diameter, and high maintenance requirements due to the long exposure of polymer solutions to electric fields, leading to inconsistent fiber quality and increased production costs.

Innovation Solution

A method and device where the active spinning zone of the cord maintains a stable position relative to the collecting electrode, with a system for continuous or intermittent movement of the cord to ensure a fresh liquid matrix supply and simultaneous wiping off of the devalued matrix, preventing contamination and maintaining electrostatic field intensity consistency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the polymer solution is kept in the electric field for a long time during spinning, then the spinning process can be continuous, but the solution degrades quickly causing changes in fiber diameter and quality

Engineering Contradiction:

Improvecontinuous spinningVSAvoidfiber diameter consistency

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent applies the dynamics principle by making the cord movable along its length, allowing the active spinning zone to be continuously replenished with fresh liquid matrix from the reservoir. This dynamic movement prevents the polymer solution from degrading in the electric field while maintaining continuous spinning operation, thus resolving the contradiction between productivity and manufacturing precision.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If wires are used to carry the polymer solution into the electric field, then the solution can be transported, but the wires affect the electric field negatively

Engineering Contradiction:

Improvesolution transportVSAvoidelectric field distortion

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical wire-based transport system with a cord that is directly connected to the high voltage source and moved through the liquid matrix reservoir. This substitution eliminates the need for separate carrying wires that would distort the electric field, while still achieving effective transport of the liquid matrix into the spinning zone.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Device complexity

If the polymer solution is exposed to the surrounding atmosphere during spinning, then the process is open and simple, but the solution grows old quickly causing property changes

Engineering Contradiction:

Improvespinning system simplicityVSAvoidsolution property stability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent extracts the liquid matrix from the surrounding atmosphere by immersing the cord in a liquid matrix reservoir. This extraction isolates the polymer solution from atmospheric contamination while maintaining system simplicity, thus preventing rapid degradation and property changes during the spinning process.

Inventive Principle:

Principle #2Taking out (Extraction)

4Device complexity

If the active spinning zone remains stationary, then the structure is simple, but the liquid matrix devalues during spinning requiring frequent cleaning

Engineering Contradiction:

Improvespinning structureVSAvoidmaintenance frequency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent applies dynamics by making the cord movable along its length, allowing the active spinning zone to continuously access fresh liquid matrix from the reservoir. This movement eliminates the need for frequent cleaning operations while maintaining relatively simple spinning structure, thus resolving the contradiction between device complexity and productivity.

Inventive Principle:

Principle #15Dynamics

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 ensures the production of nanofibers with consistent diameters and improved quality by maintaining the freshness of the liquid matrix, reducing the need for frequent cleaning and maintenance, and enhancing the evenness of the nanofibrous layer, thereby increasing productivity and fiber quality.

Implementation Method 1

electrostatic spinning of liquid matrix in electric field between at least one spinning electrode and against it arranged at least one collecting electrode

Methodology Applied

Scientific EffectElectrostatic field: Electric Field

Implementation Method 2

nanofibres are formed, which are carried towards the collecting electrode

Methodology Applied

Scientific EffectElectrostatic deposition: Electrostatic Deposition

Data Source

PatentUS9279195B2Device for production of nanofibres through electrostatic spinning of liquid matrix

Publication Date: 2016.03.08 ELMARCO SRO

AI summary

A device for production of nanofibers through electrostatic spinning of the liquid matrix in electrostatic field between at least one spinning electrode and a collecting electrode positioned opposite thereto, while the spinning electrode contains at least one spinning member containing the cord, which comprises a straight section which is parallel with a plane of depositing the nanofibers and/or with the collecting electrode and it forms an active spinning zone of the cord. The cord of the spinning member is stationary or is displaceable in a direction of its length or is movable in a direction of its length either discontinuously or continuously and to the cord there is assigned a device for application of the liquid matrix on the cord in a direction of length of the cord.