Bacterial Cellulose Air Filter Mesh for Haze and Formaldehyde Removal
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Solution Overview
Problem
Existing air purification methods are inadequate for effectively removing haze and formaldehyde, and pose health risks due to chemical reactions or environmental requirements, making them unsuitable for daily household use.
Innovation Solution
A bacterial cellulose-based air filter mesh with a three-layer structure, comprising a bacterial cellulose layer sandwiched by polymer fiber filter meshes, utilizing nano-titania for photocatalytic degradation and activated carbon for adsorption, and a winding device for continuous replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If common filtration and adsorption methods are used, then air purification is achieved, but purification effects on haze and formaldehyde are poor
Solution Approach 1:
The patent uses a composite structure combining bacterial cellulose nanofibers with polymer fibers. The bacterial cellulose layer provides superior filtration and adsorption capabilities for haze and formaldehyde, while the polymer fiber layers provide structural support. This composite approach achieves high purification efficiency without complex manufacturing processes.
Solution Approach 2:
The bacterial cellulose forms a nanofiber network with porous structure that efficiently captures fine particulate matter and adsorbs formaldehyde. The natural porous architecture of bacterial cellulose provides high surface area and effective filtration without requiring complex engineered pore structures.
2Reliability
If activated carbon fibers are used for adsorption, then air purification is achieved, but environmental requirements are high
Solution Approach 1:
The bacterial cellulose material is produced through biological fermentation processes that occur under mild environmental conditions. The bacteria naturally produce the cellulose nanofibers without requiring high-energy industrial processing, making the material environmentally friendly and adaptable to various conditions.
3Reliability
If low-temperature plasma purification is used, then air purification is achieved, but environmental requirements are high
Solution Approach 1:
The patent replaces energy-intensive plasma purification with a passive filtration system. The bacterial cellulose-based filter mesh physically traps particulate matter and chemically adsorbs formaldehyde without requiring electrical energy or complex plasma generation equipment, making it suitable for household use.
4Reliability
If catalytic purification is used, then air purification is achieved, but chemical reactions occur that may harm human body
Solution Approach 1:
The patent converts the harmful formaldehyde gas into harmless substances through adsorption by bacterial cellulose and polymer fibers. The material physically captures and holds formaldehyde molecules without requiring chemical reactions that could produce harmful byproducts, ensuring safe indoor air quality.
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 filter mesh provides effective filtration, formaldehyde removal, antibacterial properties, and extended service life through continuous replacement, with high filtration efficiency, strong mechanical strength, and low environmental impact.
Implementation Method 1
the bacterial cellulose-based filter mesh has advantages of porous structure, large specific surface area and a large number of pores, and has an adsorption effect for heavy metal ions, NO2, and formaldehyde, etc.
Implementation Method 2
utilizing nano-titania for photocatalytic degradation
Implementation Method 3
activated carbon for adsorption
Implementation Method 4
the bacterial cellulose-based filter mesh is formed by in-situ synthesis of bacterial cellulose on a non-woven fabric through fermentation by bacteria
Data Source
AI summary
A bacterial cellulose-based air filter mesh and use thereof are disclosed. The bacterial cellulose-based air filter mesh comprises a three-layer structure, in which a layer of a bacterial cellulose-based filter mesh is sandwiched by two layers of polymer fiber filter meshes; wherein the polymer fiber filter mesh is a mesh having a uniform grid size formed from polymer fibers by blended-yarn weaving; and the bacterial cellulose-based filter mesh is formed by in-situ synthesis of bacterial cellulose on a non-woven fabric through fermentation by bacteria. The bacterial cellulose-based air filter mesh has better particle filtering effect, better formaldehyde adsorption capacity, better antibacterial performance and good electrostatic capacity; and it can be used for producing gauze windows, air conditioning filters, air purification filters and the like, and has a wide range of applications.