1. Hydrothermal method-assisted synthesis of self-crosslinked all-lignin-based hydrogels.
- Author
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Lv Z, Zheng Y, Zhou H, Pan Z, Li C, Dai L, Zhang M, and Si C
- Subjects
- Biopolymers, Chemical Phenomena, Polymers chemistry, Hydrogels chemistry, Lignin chemistry
- Abstract
Lignin, as the most abundant aromatic biopolymer, is being widely studied to replace phenol and some other petroleum-based materials in the polymer industry. However, the low substitution of lignin and high levels of additives greatly limited the applications of lignin-based materials. Herein, we first propose a simple but effective hydrothermal method assisted synthesis for the fabrication of self-crosslinked lignin-based hydrogels (Lig-Scgel) with super-high-contents (75 wt%) of lignin and controllable mechanical properties. The self-crosslink mechanism was inspired by the repolymerization of lignins under a hydrothermal environment. The employment of self-condensation of lignin subunits in the synthesis of Lig-Scgel can significantly improve the degree of crosslinking, thereby greatly reducing the addition of toxic crosslinkers. The appearances, microstructures, crosslink densities, and mechanical properties of Lig-Scgels can be well controlled by simply altering the hydrothermal temperatures. This strategy not only promotes green and large-scale applications of lignin but also provides insights in the development of environment-friendly polymeric materials., (Copyright © 2022 Elsevier B.V. All rights reserved.)
- Published
- 2022
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