Multilayer Nanofiber Filter for Virus and Gas Removal
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Solution Overview
Problem
Current air and water purification devices require multiple filters for different functions, leading to increased manufacturing costs, waste, and environmental contamination due to the disposable nature of mask filters, which lack reusability and effective sterilization capabilities.
Innovation Solution
A nanofiber filter comprising multiple layers, including a photocatalytic, gas suction, and hygroscopic layer, electrospun onto breathable supports, capable of sterilizing viruses, removing harmful gases, odors, and moisture, allowing for a single filter to perform multiple functions and be reused with a regeneration device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate filters are used for different functions (virus removal, gas removal, moisture removal), then each function can be performed effectively, but manufacturing costs increase and device complexity increases
Solution Approach 1:
The patent combines multiple filtering functions (virus removal, gas removal, moisture removal) into a single integrated filter assembly. The filter assembly includes a housing containing multiple filter layers with different functionalities arranged in sequence, allowing air to pass through all layers simultaneously. This merging approach reduces the number of separate filter components needed while maintaining effective performance of each filtering function.
Solution Approach 2:
The single filter assembly is designed to perform multiple functions simultaneously: it removes viruses through electrostatic filtration, captures harmful gases and odors through activated carbon layers, and eliminates moisture through hydrophobic membrane layers. This multi-functional design allows one filter assembly to replace what would traditionally require multiple separate filters, reducing overall system complexity.
2Reliability
If mask filters are made disposable for hygiene reasons, then sterilization is ensured, but manufacturing costs increase and environmental waste increases
Solution Approach 1:
The filter assembly is designed with reusable components that can be recovered and regenerated. The housing and structural elements are durable and can be cleaned and reused multiple times. The filter layers are arranged to allow for selective replacement or regeneration, reducing overall waste while maintaining sterilization effectiveness through proper maintenance protocols.
3Reliability
If electrostatic force is used for particle collection in mask filters, then filtration efficiency is improved, but the filter loses capability when electrostatic force is lost
Solution Approach 1:
The filter assembly uses composite material structures combining electrostatically charged layers with mechanical filtration layers. The electrostatic layers provide enhanced particle collection efficiency for viruses and fine particles, while the mechanical filtration layers (such as melt-blown polypropylene) provide structural support and continue to function through physical barrier mechanisms even when electrostatic charge diminishes. This composite approach extends the effective lifespan of the filter.
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 nanofiber filter reduces manufacturing costs by consolidating functions into one filter, enables reusability, and minimizes environmental waste by allowing the filter to be washed and reused, effectively sterilizing air and water contaminants.
Implementation Method 1
The first nanofiber filter layer may include an electrospun photocatalytic nanomaterial mixture. The photocatalytic nanomaterial mixture may include at least one of UV-sensitive photocatalytic nanoparticles or visible light-sensitive photocatalytic nanoparticles.
Implementation Method 2
The second nanofiber filter layer may include an electrospon gas suction material mixture.
Implementation Method 3
The third nanofiber filter layer may include an electrospun hygroscopic nanomaterial mixture.
Implementation Method 4
forming a first nanofiber filter layer on a rear surface of a first support by electrospinning a photocatalytic nanomaterial mixture; forming a second nanofiber filter layer on a rear surface of the first nanofiber filter layer by electrospinning a gas suction material mixture
Data Source
AI summary
A nanofiber filter includes: a first support having a front surface and a rear surface opposite to the front surface; a first nanofiber filter layer disposed on the rear surface of the first support; a second nanofiber filter layer disposed on a rear surface of the first nanofiber filter layer; a third nanofiber filter layer disposed on a rear surface of the second nanofiber filter layer; and a second support disposed on a rear surface of the third nanofiber filter layer.