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Multifunctional composite membrane based on BaTiO3@PU/PSA nanofibers for high-efficiency PM2.5 removal
Xue Yang1, Yi Pu1, Yifei Zhang1
1Industrial Research Institute of Nonwovens & Technical Textiles, College of Textiles & Clothing, Qingdao University, Qingdao 266071, Shandong, PR China.
Journal of Hazardous Materials
|February 17, 2020
Summary
A novel barium titanate@polyurethane/polysulfonamide (BaTiO3@PU/PSA) nanofibrous membrane offers superior PM2.5 removal and high-temperature filtration. This robust material demonstrates excellent efficiency and stability in harsh conditions.
Area of Science:
- Materials Science
- Nanotechnology
- Environmental Engineering
Background:
- Developing advanced filtration membranes is crucial for air purification, especially in demanding environments.
- Existing membranes often lack stability at high temperatures or resistance to chemical degradation.
- Particulate matter (PM2.5) poses significant health risks, necessitating efficient removal technologies.
Purpose of the Study:
- To fabricate a novel composite nanofibrous membrane with enhanced properties for high-temperature filtration and PM2.5 removal.
- To investigate the structure-property relationships governing the filtration performance of the composite membrane.
- To evaluate the membrane's stability and efficiency under various harsh conditions.
Main Methods:
- Fabrication of barium titanate@polyurethane/polysulfonamide (BaTiO3@PU/PSA) composite nanofibrous membrane via blending spinning.
- Characterization of membrane properties including capture efficiency, pressure drop, mechanical strength, thermal stability, and chemical resistance.
- Analog simulation to investigate filtration processes and their dependence on fiber structure, temperature, and gas velocity.
Main Results:
- The BaTiO3@PU/PSA membrane achieved 99.99% capture efficiency for fine particulates with a low pressure drop (39.4 ± 0.2 Pa).
- The membrane exhibited excellent mechanical properties (13.27 MPa), flexibility, high thermal stability (up to 300 °C), flame-retardancy, and chemical resistance.
- Filtration performance remained stable after high-temperature, acid, or alkali treatments, demonstrating robustness.
Conclusions:
- The fabricated BaTiO3@PU/PSA nanofibrous membrane possesses comprehensive properties for high-temperature filtration and robust PM2.5 removal.
- The composite membrane is a promising candidate for dust removal applications, particularly in harsh environments.
- The study highlights the potential of BaTiO3 incorporation for enhancing membrane performance and durability.
