木质素
自愈水凝胶
生物高聚物
热液循环
化学工程
聚合物
材料科学
苯酚
环境友好型
化学
有机化学
生态学
工程类
生物
作者
Zilu Lv,Yong Zheng,Hao Zhou,Zheng Pan,Chenyu Li,Lin Dai,Meng Zhang,Chuanling Si
标识
DOI:10.1016/j.ijbiomac.2022.07.003
摘要
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.
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