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TiO₂-Chitosan Functionalized Polypropylene Nonwovens for Air Filtration Applications

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Abstract:

In this study, a multifunctional air filtration material was developed by coating polypropylene (PP) nonwoven fabric with a chitosan/TiO₂ (P25) composite. The aim was to enhance air filtration efficiency. The chitosan–P25 composite was applied onto the PP nonwoven via a solution spray method followed by drying. Scanning electron microscopy (SEM) analysis revealed a uniform coating layer with good adherence to the PP fiber surface. X-ray diffraction (XRD) analysis confirmed the presence of crystalline TiO₂ in the P25 phases, as well as the semi-crystalline nature of the PP substrate. Air permeability tests showed a moderate reduction in air flow rate due to surface coating, while maintaining acceptable breathability for filter applications.

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Periodical:

Defect and Diffusion Forum (Volume 447)

Pages:

59-66

DOI:

https://doi.org/10.4028/p-is6NiV

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Online since:

February 2026

Authors:

Boonsak Techo, Siripan Metanawin, Tanapak Metanawin*

Keywords:

Chitosan, Polymer Hybrid, Polypropylene (PP), Titanium Dioxide P25

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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