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Synthesis Method for Cellulose Nanofiber Biotemplated Palladium Composite Aerogels
Published on: May 9, 2019
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Preparation and adsorption performance of functionalization cellulose-based composite aerogel
Kehao Fan1, Tianjing Zhang1, Siyu Xiao1
1School of Resources Environment and Materials, Guangxi University, Nanning 53004, China; Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Nanning, 530004, China.
International Journal of Biological Macromolecules
|May 13, 2022
Summary
Functionalized cellulose composite aerogels with carboxyl cellulose nanofibers, montmorillonite, and polyethyleneimine exhibit excellent mechanical properties and high adsorption capacity for Congo red dye. These materials can be further modified for hydrophobic applications.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Cellulose-based aerogels are promising materials due to their unique properties.
- Developing composite aerogels with enhanced mechanical and adsorption capabilities is crucial for various applications.
- Functionalization strategies are key to tailoring aerogel properties for specific uses.
Purpose of the Study:
- To fabricate and characterize novel cellulose-based composite aerogels incorporating carboxyl cellulose nanofibers (CNF), montmorillonite (MMT), and polyethyleneimine (PEI).
- To investigate the adsorption properties and mechanism of these composite aerogels for Congo red dye removal.
- To explore the modification of aerogel surface properties for potential hydrophobic applications.
Main Methods:
- Solution blending and freeze-drying techniques were employed for aerogel fabrication.
- Characterization included morphology, chemical structure, and thermal stability analysis.
- Adsorption studies utilized Congo red dye, analyzed using kinetic and isotherm models.
- Surface functionalization with octadecyl trichlorosilane (OTS) was performed.
Main Results:
- The fabricated CNF/MMT/PEI composite aerogels (CMP) exhibited a 3D network structure with abundant pores.
- The addition of PEI significantly improved the adsorption capacity for Congo red dye, reaching 3114 mg/g (Langmuir model).
- Adsorption followed pseudo-second-order kinetics and Langmuir isotherm, indicating chemical adsorption.
- OTS functionalization resulted in a hydrophobic surface with a contact angle of 151.80°.
Conclusions:
- Cellulose-based composite aerogels functionalized with CNF, MMT, and PEI demonstrate superior mechanical properties and high adsorption efficiency for Congo red.
- The developed materials show potential for wastewater treatment and tunable surface properties.
- The study highlights the synergistic effects of composite components in enhancing aerogel performance.
