Green and ultrastrong polyphenol lignin-based vitrimer adhesive with photothermal conversion property, wide temperature adaptability, and solvent resistance

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
出处
期刊:Chemical Engineering Journal [Elsevier BV]
卷期号:477: 147216-147216 被引量:59
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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