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Multiple hydrogen bonding self-assembly tailored electrospun polyimide hybrid filter for efficient air pollution
Fan Xie1, Yafang Wang1, Longhai Zhuo1
1College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Key Laboratory of Paper Based Functional Materials of China National Light Industry, Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an 710021, China.
A novel hybrid filter using polyimide fibers and Zeolitic Imidazolate Framework-8 effectively purifies air at high temperatures. This advanced material removes 99.28% of fine particulate matter and adsorbs formaldehyde, offering a promising solution for air quality control.
Area of Science:
- Materials Science
- Environmental Science
- Chemical Engineering
Background:
- Air pollution poses significant risks to human health.
- Developing high-temperature air filters with stable structures for efficient pollutant removal remains a challenge.
Purpose of the Study:
- To fabricate a stable hybrid filter for high-temperature air purification.
- To enhance filtration and adsorption performance using a polyimide-based composite material.
Main Methods:
- Electrospun polyimide (PI) fibers were functionalized using Octa(amino-propylsilsesquioxane) (POSS-NH2).
- Amino-functionalized Zeolitic Imidazolate Framework-8 (NH2-ZIF-8) nanocrystals were anchored onto PI fibers via hydrogen bonding.
- The hybrid filter's performance was evaluated at 280°C for particulate matter (PM0.3) removal and volatile organic compound (VOC) adsorption.
Main Results:
- The PI-POSS@ZIF hybrid filter achieved a 99.28% PM0.3 removal efficiency at 280°C with a low pressure drop of 49.21 Pa.
- The filter demonstrated a formaldehyde adsorption capacity of 89.95 mg/g.
- Synergistic effects between PI fibers and NH2-ZIF-8 contributed to the enhanced performance.
Conclusions:
- The developed hybrid filter exhibits excellent high-temperature performance for both particulate matter filtration and VOC adsorption.
- The use of POSS-NH2 as a bridging agent and NH2-ZIF-8 for adsorption offers a viable strategy for advanced air purification materials.
- This technology holds significant potential for addressing air quality challenges in demanding environments.
