Nanoparticle Filtration Membrane Using Electrospinning
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Solution Overview
Problem
Current filtration technologies face challenges in efficiently capturing a broad range of particulate sizes, particularly nanoparticulates of diameter ≤ 400 nm, due to the need for thick filter media, which results in high pressure drops and reduced throughput, making them energy-intensive and inefficient.
Innovation Solution
A layered filter membrane system incorporating nanomembranes with fiber diameters ≤ 100 nm, embedded or coated within traditional filter media, utilizing high van der Waals forces for enhanced capture efficiency while maintaining low energy demand and high throughput, achieved through methods like electrospinning with high voltage electric fields and high-speed air jets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thick filter media is used to capture nanoparticulates, then filtration efficiency is improved, but pressure drop increases and throughput is reduced
Solution Approach 1:
The patent uses ultrathin nanofiber membranes (thickness ≤ 100 nm) to achieve high filtration efficiency without requiring thick filter media. The nanoscale thickness allows the membrane to capture nanoparticles effectively while maintaining low pressure drop and high throughput, resolving the contradiction between filtration efficiency and productivity.
Solution Approach 2:
The patent employs porous nanofiber membranes with controlled pore structures that enable efficient nanoparticle capture. The porous nature at the nanoscale provides high surface area and capture efficiency while maintaining permeability, thus achieving both high filtration efficiency and throughput without requiring thick media.
2Reliability
If thick filter media is used to capture nanoparticulates, then filtration efficiency is improved, but energy consumption increases
Solution Approach 1:
The ultrathin nanofiber membrane (≤ 100 nm thickness) reduces the energy required for filtration by minimizing the resistance to flow. The thin film structure allows particles to be captured efficiently without requiring high pressure differentials, thus reducing energy consumption while maintaining filtration efficiency.
Solution Approach 2:
The patent changes the critical parameter of filter media thickness to the nanoscale range (≤ 100 nm), which fundamentally alters the filtration mechanism. This parameter change enables efficient nanoparticle capture through enhanced surface interactions and reduced flow resistance, thereby lowering energy consumption while maintaining or improving filtration efficiency.
3Ease of manufacture
If traditional filters are used, then manufacturing simplicity is maintained, but capture efficiency for particles ≤ 400 nm is insufficient
Solution Approach 1:
The patent replaces conventional mechanical filtration mechanisms with nanoscale physical and chemical interactions. The nanofiber membrane utilizes van der Waals forces, electrostatic interactions, and surface effects at the nanoscale to capture particles ≤ 400 nm, achieving high capture efficiency without complex mechanical structures or thick media.
Solution Approach 2:
The patent employs composite nanofiber membranes that combine multiple materials with complementary properties to enhance capture efficiency for nanoparticles. The composite structure integrates materials with different surface chemistries, pore sizes, and mechanical properties to achieve both high efficiency for particles ≤ 400 nm and manufacturability.
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 significantly enhances filtration efficiency for particles ≤ 400 nm with minimal pressure drop, achieving 20-50% higher capture rates and maintaining high volumetric porosity, making the process industrially scalable and cost-effective.
Implementation Method 1
utilizing high van der Waals forces for enhanced capture efficiency
Implementation Method 2
electrospinning with high voltage electric fields and high-speed air jets
Data Source
AI summary
The present innovation relates to novel and versatile nanomembrane to be used in filtration system and manufacturing method to produce it. The filter membrane may result in significant reduction in energy demand and higher capture efficiency. The filter membrane may have one or multiple nanomembrane part of overall filtration system. The manufacturing uses a combined electric and air flow field to produce the nanomembrane, which may be included as in-line module in standard filter manufacturing process. The method of nanomembrane production is optimized by machine learning-based optimization protocol based on physics-based modeling via feedback control.