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Highly flexible free-standing bacterial cellulose-based filter membrane with tunable wettability for high-performance
Ying Hu1, Jialun Jiang1, Jingya Dong1
1Department of Environmental Engineering, School of Chemical and Environmental Engineering, Anhui Polytechnic University, Beijing Middle Road, Wuhu 241000, China.
International Journal of Biological Macromolecules
|January 2, 2025
Summary
A novel biomass-derived filter membrane was developed using bacterial cellulose and hydroxyapatite nanowires. This advanced material offers efficient wastewater treatment with tunable properties for separating nanoparticles, dyes, and organic solvents.
Area of Science:
- Materials Science
- Environmental Science
- Nanotechnology
Background:
- Water purification is a critical global challenge requiring advanced separation technologies.
- Existing membranes often face limitations in performance, stability, and sustainability.
- Biomass-derived materials offer a sustainable platform for developing novel filtration solutions.
Purpose of the Study:
- To develop a novel organic-inorganic composite membrane for advanced water purification and solvent separation.
- To engineer tunable wettability for versatile membrane applications.
- To assess the performance, stability, and sustainability of the developed membrane.
Main Methods:
- Fabrication of a composite membrane using TEMPO-oxidized bacterial cellulose (BC) nanofibers and hydroxyapatite nanowires (HAPNW).
- Characterization of membrane properties including mechanical strength, flexibility, and water flux.
- Evaluation of rejection efficiency for TiO2 nanoparticles and methylene blue, and separation of organic solvents/oils after wettability modification.
Main Results:
- The TEMPO-BC/HAPNW membrane exhibited excellent mechanical properties and high pure water flux (800 L·m⁻²·h⁻¹).
- Achieved high rejection rates for TiO2 nanoparticles and methylene blue via size exclusion and electrostatic interactions.
- In situ modification enabled tunable hydrophobic/lipophilic properties for efficient oil and organic solvent separation with cycle stability.
Conclusions:
- A novel, high-performance, biomass-derived filter membrane was successfully developed.
- The membrane demonstrates versatility for both water purification and organic solvent/oil separation.
- This work presents a sustainable and scalable approach for advanced wastewater treatment.
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