Polymer Nanofiber Structural Body with Argon Beam Orientation
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Solution Overview
Problem
Existing polymer nanofiber structural bodies used for particle collection face issues with adhesion between layers, leading to peeling when bent or used on curved surfaces, and clogging of pore structures, which reduces efficiency in collecting fine particles.
Innovation Solution
A polymer nanofiber structural body with layers having different pore structures, where the length directions of nanofibers in one layer are irregularly directed and in another layer are primarily directed towards the thickness direction, with nanofibers extending over both layers, and a method involving argon beam irradiation to transform part of one layer into another with altered fiber orientation, ensuring continuous nanofibers across layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a nanofiber layer is integrated on a macrofiber layer to provide multiple pore structures, then particle collection capability is improved, but adhesion between layers deteriorates causing peeling at interfaces
Solution Approach 1:
The patent merges the nanofiber layer and macrofiber layer into a single integrated nonwoven fabric structure, where nanofibers are embedded within the macrofiber matrix rather than simply layered on top. This integration ensures that both layers function together as one unified structure, preventing peeling while maintaining multiple pore structures for effective particle collection across different size ranges.
Solution Approach 2:
The patent applies different fiber characteristics to different regions of the nonwoven fabric. The macrofiber regions provide structural support and larger pores for coarse particles, while the nanofiber regions provide fine pores for fine particles. This local differentiation of fiber properties enables the material to perform multiple particle collection functions simultaneously while maintaining structural integrity.
2Reliability
If bead-like structural body is formed in nanofiber to improve interfacial adhesiveness, then adhesion between base material layer and nanofiber layer is improved, but pore structure clogging occurs reducing fine particle collection efficiency
Solution Approach 1:
The patent employs a porous nonwoven fabric structure where nanofibers are distributed throughout the macrofiber matrix, maintaining open pore channels for particle penetration. The porous structure prevents clogging by ensuring that nanofibers do not aggregate into bead-like formations that would block pore passages, while still providing sufficient surface area for particle capture through van der Waals forces and electrostatic interactions.
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 solution provides a durable polymer nanofiber structural body that maintains integrity on curved surfaces and enhances particle collection efficiency by preventing peeling and clogging, with improved adhesiveness between layers due to continuous nanofiber integration.
Implementation Method 1
irradiating an argon beam from a base material side in parallel with the fracture surface to turn a part of the first layer on the base material side into a second layer
Data Source
AI summary
A method of producing a polymer nanofiber structural body of the present invention includes: forming, on a base material, a first layer in which polymer nanofibers are irregularly integrated by an electrospinning method; cutting the first layer together with the base material; and irradiating an argon beam from a base material side in parallel with a fracture surface to direct the length directions of the polymer nanofibers of the first layer on the base material side toward the thickness direction of the first layer to form a second layer different from the first layer in pore structure, thereby providing a polymer nanofiber structural body having a plurality of pore structures and free of any clear interface.