Lobster-Inspired Chitosan-Derived Adhesives with a Biomimetic Design

作者：Kelu Ni, Jiaojiao Yu, Guanben Du, Jiawei Qian, Hongxing Yang, Jiajian Wang, Jianyong Wan, Xin Ran, Wei Gao, Zhijun Chen, Long Yang · 发表于：ACS Applied Materials & Interfaces · 年份：2024 · DOI：10.1021/acsami.3c19369 · 被引用次数：36 · 研究领域：Surface Modification and Superhydrophobicity、Polymer Surface Interaction Studies、Marine Biology and Environmental Chemistry

Polysaccharide-based adhesives, especially chitosan (CS)-derived adhesives, serve as promising sustainable alternatives to traditional adhesives. However, most demonstrate a poor adhesive strength. Inspired by the inherent layered structure of marine arthropods (lobsters), a core–shell structure (SiO 2 –NH 2 @OPG) with amine-functionalized silica (SiO 2 –NH 2 ) as the core and oxidized pyrogallol (OPG) as the shell is prepared in this study. The compound is blended with CS to produce a structural biomimetic wood adhesive (SiO 2 –NH 2 @OPG/CS) with excellent performance. In addition to thermocompressive curing, this adhesive exhibits a water-evaporation-induced curing behavior at room temperature. With reference to the design mechanism of the lobster cuticle, this microphase-separated structure consists of clustered nanofibers with varying amounts of SiO 2 –NH 2 @OPG particles between the fibers. This intriguing microphase structure and its mechanical effects could offer a powerful solution for improving the functional modification of wood composites.