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[CITY, STATE] – The escalating demand for complex air filtration technologies across industries like coal chemical processing, oil and gas refining, and semiconductor manufacturing is driven by the need for both enhanced production processes and greater environmental responsibility.
Credit: Journal of Hazardous Materials (2025). DOI: 10.1016/J. Jhazmat.2025.139221
The ability to synergistically remove fine particulate matter (PM) and harmful gases is a key requirement,spurring the development of environmentally kind,multifunctional filtration materials.
Traditional cellulose paper-based filtration materials are limited by their insufficient mechanical strength and stability, restricting their use in demanding industrial environments.
To overcome these limitations, researchers at the Xinjiang Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences have developed environmentally sound, multifunctional air filtration materials by combining cellulose with inorganic rigid fibers. Their findings were blank”>published in the Journal of Hazardous materials.
The team utilized Lyocell fibers (a natural biomass fiber) and basalt fibers (a mineral-based fiber) as raw materials to fabricate a series of composite fiber filtration materials using a wet-laid process-an adhesive-free manufacturing method that enhances the materials’ environmental compatibility.
Testing revealed that the composite materials offer two key advantages over pure cellulose fiber-based alternatives. First, the inclusion of basalt fibers significantly improves burst and tear strength, addressing the fragility of traditional cellulose filters. Second, despite the presence of rigid basalt fibers, the composites maintain high flexibility, allowing them to be used in various filtration equipment and installation scenarios.
To further improve air purification capabilities, the researchers grew zeolitic imidazolate framework-8 (ZIF-8)-a metal-organic framework with high adsorption capacity-in-situ on the surface of the composite fibers.
The basalt fiber component also provides excellent heat resistance. The materials maintained stable filtration performance even at temperatures as high as 250 °C-common in coal chemical and oil refining processes-outperforming traditional cellulose filters that degrade at high temperatures.
The researchers concluded that these materials offer an efficient, multifunctional, and sustainable solution for air filtration in complex industrial environments.
The Quest for Better Air Filtration
Table of Contents
Industries are increasingly seeking advanced air filtration solutions to meet stringent environmental regulations and improve operational efficiency. The development of composite materials like those described in the study represents a notable step forward in addressing the limitations of traditional filtration methods.
Key Advantages of the New Composite Filters
The composite filters developed by the Chinese Academy of Sciences offer a compelling alternative to traditional cellulose-based filters, particularly in demanding industrial applications.
“These materials provide an efficient, multifunctional, and sustainable solution for air filtration in complex industrial environments.”
The enhanced mechanical strength, flexibility, and heat resistance of these materials make them well-suited for use in a variety of settings, including coal chemical processing, oil and gas refining, and semiconductor manufacturing.
Future Implications
The development of these composite fiber filtration materials represents a significant advancement in air filtration technology. As industries continue to prioritize environmental sustainability and seek more efficient production processes, the demand for such innovative solutions is likely to grow.
More information: Ze-Xin Chen et al,Highly flexible and multifunctional lyocell-basalt fiber filter media for high-performance air filtration,Journal of Hazardous Materials* (2025). blank”>DOI: 10.1016/J. Jhazmat.2025.139221
Provided by Chinese Academy of Sciences
