Biodegradable Air Filter Using Date Palm Cellulose
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Solution Overview
Problem
Existing air filters are either expensive or unsuitable for effectively removing all kinds of contaminants and pollutants from the air, and they often have high maintenance and operational costs.
Innovation Solution
A biodegradable air filter is fabricated using cellulose nanofibers and activated carbon derived from date palm biomass, combined with a polyalkylene glycol binder, to create a sustainable and cost-effective filtration material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional air filters (HEPA, ULPA, activated carbon) are used to effectively remove contaminants and pollutants from the air, then the filtering efficiency is improved, but the maintenance cost and operational cost increase significantly
Solution Approach 1:
The patent changes the material parameters by using cellulose nanofibers derived from date palm biomass instead of conventional filter materials. This natural fiber structure provides effective filtration while being biodegradable and cost-effective, resolving the contradiction between filtering efficiency and maintenance cost
Solution Approach 2:
The patent employs porous cellulose nanofiber structures with controlled pore sizes that can capture particles of various sizes. The porous structure provides high surface area for filtration while maintaining breathability and effectiveness, achieving good filtering efficiency without the high costs associated with conventional dense filter materials
2Reliability
If conventional air filters are used to capture particles and pollutants, then the air purification effectiveness is improved, but the filters need frequent replacement increasing operational cost
Solution Approach 1:
The patent uses cellulose nanofibers with specific dimensional parameters (nanoscale diameter) and surface properties that provide sustained filtration capability. The high surface area to volume ratio and natural fiber structure allow the filter to maintain effectiveness over extended periods without frequent replacement
Solution Approach 2:
The patent employs a biodegradable cellulose-based filter that can be disposed of after use without environmental harm. While individually replaceable, the low cost and biodegradability mean they don't require frequent replacement like expensive conventional filters, effectively extending the practical service life of the filtration system
3Object-generated harmful factors
If biodegradable materials are used to create the air filter, then environmental friendliness is improved, but the filtering capability for all types of contaminants may be reduced
Solution Approach 1:
The patent creates a composite structure using cellulose nanofibers combined with activated carbon particles. This composite material maintains the biodegradability and environmental friendliness of cellulose while adding the superior adsorption capabilities of activated carbon, thereby achieving both environmental friendliness and comprehensive filtering capability for various contaminants including VOCs, odors, and particles
Solution Approach 2:
The patent utilizes the natural porous structure of cellulose nanofibers which provides physical filtration for particles, while the porosity also allows activated carbon to effectively adsorb gaseous contaminants. The hierarchical pore structure enables simultaneous capture of different sized particles and molecules, maintaining high filtering capability across multiple contaminant types while using biodegradable base material
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 biodegradable air filter efficiently removes contaminants, including microbial particles, pollutants, and odors from the air, while being environmentally friendly and cost-effective, with the added benefit of being easily decomposable.
Implementation Method 1
The biodegradable air filter efficiently removes contaminants, including microbial particles, pollutants, and odors from the air
Implementation Method 2
activated carbon-based air filters with membranes made of activated carbon. The most common structures made of carbon are carbon nanotubes, carbon fibers, activated carbon, black carbon, and diamond. Carbon-based structures are multipurpose materials, and therefore are used in various fields. For example, activated carbon may act as an absorbent and attracts pollutants, dust, and microbial particles
Implementation Method 3
Air filters are able to improve and maintain air quality, by capturing and retaining particles circulating in the air, stopping their further circulation in the air. Air filters typically contain a filter or a mesh comprising a mesh size that is sufficient to stop particles of pollutants, chemicals, and microorganisms from entering or circulating in the area
Data Source
AI summary
A biodegradable filter for the removal of various pollutants, contaminants, or harmful substances from the surrounding air, and a method of fabrication. The filter includes 30% by weight of cellulose nanofibers, 30% by weight of activated carbon, and 20% by weight of polyethylene glycol. The cellulose nanofibers and activated carbon are isolated from date palm biomass, making the filter cost-effective and environmentally friendly.