Polymer-Micelle Complex for Aqueous Nanofiber Electrospinning
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Solution Overview
Problem
Existing electrospinning techniques struggle to produce uniform nanofibers from polymers with low viscosity, low aqueous solubility, or low molecular weight, often requiring non-aqueous solvents that are environmentally undesirable for large-scale production.
Innovation Solution
Incorporating a polymer-micelle complex into the spin dope to enhance the viscosity and electrospinnability of materials, allowing for the production of nanofibers from aqueous or non-aqueous solvents, including sparingly soluble polymers, enzymes, cells, and nanoparticles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If non-aqueous solvents are used to electrospin polymers with low viscosity or low aqueous solubility, then electrospinnability is improved, but environmental harm increases
Solution Approach 1:
The patent modifies the physical and chemical parameters of aqueous solutions by adding polymers and surfactants to change viscosity, surface tension, and conductivity. This allows aqueous solutions to achieve electrospinnability previously only attainable with non-aqueous solvents, thereby resolving the contradiction between ease of manufacture and environmental harm
Solution Approach 2:
The patent introduces polymers and surfactants as intermediary substances that mediate between the aqueous solvent and the polymer to be electrospun. These intermediaries modify the solution properties to enable electrospinning of materials that would otherwise require non-aqueous solvents, eliminating environmental harm while maintaining electrospinnability
2Adaptability or versatility
If polymers with low viscosity or low molecular weight are used, then material versatility is improved, but fiber formation stability deteriorates
Solution Approach 1:
The patent creates composite spin dope solutions containing multiple components: polymers (such as PEO, PVA, or gelatin), surfactants (such as SDS or Tween 80), and the target material to be electrospun. This composite formulation provides both the versatility to process diverse materials and the stability needed for consistent fiber formation, resolving the contradiction between adaptability and stability
Solution Approach 2:
The patent systematically adjusts solution parameters including viscosity (through polymer concentration and molecular weight selection), surface tension (through surfactant addition), and conductivity (through ionic content). These parameter modifications enable low-viscosity and low-molecular-weight materials to form stable fibers by optimizing the balance between electrostatic forces and surface tension
3Object-affected harmful factors
If aqueous solvents are used for electrospinning, then environmental friendliness is improved, but electrospinnability of many polymers deteriorates
Solution Approach 1:
The patent fundamentally changes the parameters of aqueous solutions by adding polymers to increase viscosity and surfactants to reduce surface tension. These parameter modifications transform ordinary aqueous solutions into electrospinnable formulations, achieving both environmental friendliness and ease of manufacture simultaneously
Solution Approach 2:
The patent uses polymers and surfactants as intermediary agents that enable aqueous solvents to effectively electrospin polymers that would otherwise be incompatible with water-based systems. These intermediaries bridge the gap between environmental requirements and manufacturing feasibility
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
Enables the electrospinning of previously non-electrospinnable materials into fibers, particularly from aqueous solvents, improving the range of solvents and polymers that can be used, and reducing environmental impact by avoiding non-aqueous solvents.
Implementation Method 1
Incorporating a polymer-micelle complex into the spin dope to enhance the viscosity and electrospinnability of materials
Implementation Method 2
the basic process of electrospinning... An electrode from a high voltage power supply is in contact with the needle and applies an electric potential thereto, which electric potential induces free charges in the polymer solution. These free charges, in turn, introduce a tensile force in the polymer solution.
Data Source
AI summary
A polymer-micelle complex suitable for use as an aid to preparing fibers, particularly nanofibers, by electrospinning. The polymer-micelle complex may be designed to impart viscosity, surface tension and conductivity properties optimal for electrospinning. By incorporating the complex as a secondary ingredient, one may electrospin sparingly soluble or low molecular weight polymers. Moreover, the polymer-micelle complex can be used as a generic carrier for preparing fibers incorporating other desired materials, such as rigid or globular (hard-to-spin) polymers, enzymes, cells, viral particles and nanoparticles.