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Reactive SAH-Based Deep Eutectic Solvent Enables Efficient Carboxylation of Bamboo Fibers with Preserved Structure
Ziliang Dai1, Enqing Zhu1, Jiao Meng1
1Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food Engineering, College of Chemical Engineering, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing210037, China.
Researchers developed a novel deep eutectic solvent (DES) strategy using succinic anhydride to selectively carboxylate cellulose fibers. This method preserves fiber structure and enhances electrical conductivity for advanced material applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Green Chemistry
Background:
- Selective chemical modification of cellulose in lignocellulosic biomass is challenging.
- Maintaining the native hierarchical structure during modification is crucial for material properties.
Purpose of the Study:
- To develop a method for selective cellulose esterification without structural disruption.
- To create carboxylated fibers for enhanced conductivity through deposition of conductive materials.
Main Methods:
- Utilized a reactive succinic anhydride-based deep eutectic solvent (SAH-DES) system.
- Optimized reaction conditions (100 °C, 3 h) for carboxylated bamboo fibers (C-BFs).
- Deposited Ag/Ni nanoparticles and polypyrrole onto the modified fibers.
Main Results:
- Achieved high carboxyl content (1.01 ± 0.03 mmol/g) in C-BFs.
- Retained excellent tensile strength (2104 ± 237 MPa) of the fibers.
- Obtained high electrical conductivity (34,271 ± 1266 S/m) after conductive material deposition.
Conclusions:
- Water-regulated reactivity in DES enables selective cellulose esterification.
- The SAH-DES strategy offers a pathway for functionalizing lignocellulosic fibers while preserving structure.
- This approach provides mechanistic insights into polysaccharide reactivity in confined solvent systems.
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