木质素
胶粘剂
材料科学
苯酚
复合材料
有机化学
化学
图层(电子)
作者
Yanfan Yang,Hao Zhou,Xiaoqi Chen,Tingting Liu,Yong Zheng,Lin Dai,Chuanling Si
标识
DOI:10.1016/j.cej.2023.147216
摘要
Lignin, a natural adhesive in plants, has received extensive attention from both academia and industry. However, limited by the reactivity and heterogeneity of industrial lignin raw materials, lignin-based adhesives are not competitive in terms of adhesive performance and reusability. Here, a green and facile method is reported for a polyphenol lignin (Phenol-lignin)-based, ultrastrong, reusable, wide temperature adaptability, and solvent-resistant vitrimer adhesive with molecular designs of lignin extending beyond those in nature. The fabricated Phenol-lignin-based vitrimer exhibits the world’s highest wood lap shear strength of 12.87 MPa among the vitrimer adhesives. Even in extreme environments, such as boiling water (100 °C), liquid nitrogen (-196 °C), and organic solvents, the Phenol-lignin-based vitrimer-bonded wood sheets can still maintain a high level of strength. In addition, due to the good light-to-heat conversion performance of lignin, Phenol-lignin-based vitrimer can be repaired by infrared laser irradiation. The recycled adhesive retained 93.1 % of its strength. This new lignin material will be incorporated into not only industrial adhesives but also various green material systems in the future.
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