Polymeric Sorbent Air Filters for Aldehyde Removal
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Solution Overview
Problem
Current air filtration technologies are inadequate for effectively removing gaseous substances like formaldehyde from air, as they lack efficient sorbent materials that can reliably capture and retain such volatile compounds.
Innovation Solution
The development of air filters utilizing polymeric sorbent particles formed from a hydrolyzed divinylbenzene/maleic anhydride precursor material ionically attached with a nitrogen-containing compound, which are supported by various filter structures to facilitate the capture of aldehydes like formaldehyde from air streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional air filtration technologies are used, then the filter structure is simple and easy to manufacture, but the ability to remove gaseous substances like formaldehyde is insufficient
Solution Approach 1:
The patent uses composite polymeric sorbent particles formed by ionically attaching nitrogen-containing compounds to hydrolyzed divinylbenzene/maleic anhydride precursor materials. This composite structure combines the advantages of different materials to achieve high removal efficiency for gaseous substances while maintaining a relatively simple filter configuration.
Solution Approach 2:
The polymeric sorbent particles are designed with porous structures that provide high surface area and accessibility for gas sorption. The porous morphology enables effective capture of volatile compounds like formaldehyde without requiring complex multi-layer filter assemblies.
2Reliability
If polymeric sorbent particles are used to improve gas removal, then the sorption capability increases, but the manufacturing complexity of the filter increases
Solution Approach 1:
The polymeric sorbent particles are pre-formed with specific ionically attached nitrogen-containing compounds before being integrated into the filter structure. This preliminary preparation of the sorbent material with optimized sorption properties simplifies the final filter assembly process while ensuring high aldehyde capture capability.
Solution Approach 2:
The patent optimizes parameters such as the type and amount of nitrogen-containing compounds, the hydrolysis degree of the precursor material, and the particle size distribution to achieve maximum sorption efficiency. These parameter optimizations are built into the sorbent formulation, simplifying manufacturing by eliminating the need for complex post-processing steps.
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
These air filters demonstrate enhanced capability in removing aldehydes from air, providing improved air quality by effectively sorbing and retaining gaseous pollutants, including formaldehyde, through the use of polymeric sorbent particles integrated into diverse filter support configurations.
Implementation Method 1
polymeric sorbent particles that are the reaction product of a hydrolyzed divinylbenzene/maleic anhydride precursor polymeric material with a nitrogen-containing compound
Implementation Method 2
the nitrogen-containing compound being ionically attached to the hydrolyzed divinylbenzene/maleic anhydride
Data Source
AI summary
An air filter including a filter support that supports polymeric sorbent particles. The polymeric sorbent particles are the reaction product of a hydrolyzed divinylbenzene/maleic anhydride precursor polymeric material with a nitrogen-containing compound, with the nitrogen-containing compound being ionically attached to the hydrolyzed divinylbenzene/maleic anhydride.