期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 219, 期 -, 页码 611-625出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2022.08.028
关键词
Biomimetic adhesive; Phenol -amine synergy; Adhesion strength and toughness
资金
- National Natural Science Foundation of China [32101456]
- Natural Science Foun- dation of Jiangsu Province [BK20200795]
- China Post- doctoral Science Foundation [2022M710598]
- Project of Practice Innovation Training Program for College Students in Jiangsu Province [202110298190H]
A high-performance adhesive inspired by lobster cuticular sclerotization was developed using catechol-rich condensed tannin-functionalized boron nitride nanosheets (CT@BNNSs), amino-containing chitosan (CS), and soybean meal (SM). The adhesive showed improved water tolerance, mechanical strength, and toughness compared to neat SM adhesive due to the synergistic effects of phenol-amine interactions and the reinforcement of uniformly dispersed BNNSs.
Soybean meal (SM)-based adhesive can solve the issues of formaldehyde emission and over-reliance of aldehyde -based resins but suffers from poor water resistance, weak adhesion strength, and high brittleness. Herein, a high-performance adhesive inspired by lobster cuticular sclerotization was developed using catechol-rich condensed tannin-functionalized boron nitride nanosheets (CT@BNNSs), amino-containing chitosan (CS), and SM (CT@BNNSs/CS/SM). The oxidative crosslinking between the catechol and amino, initiated by oxygen at high temperatures, formed a strengthened and water-resistant interior network. These strong intermolecular in-teractions induced by phenol-amine synergy accompanied by the reinforcement of uniformly dispersed BNNSs improved the load transfer and energy dissipation capacity, endowing the adhesive with great cohesion strength. Given these synergistic effects, the biomimetic CT@BNNSs/CS/SM adhesive caused noticeable improvements in water tolerance, mechanical strength, and toughness over the neat SM adhesive, e.g., enhanced wet shear strength (1.46 vs. 0.66 MPa, respectively), boiling water shear strength (0.92 vs. 0.43 MPa, respectively), and debonding work (0.368 vs. 0.113 J, respectively). Thus, this study provided a green and low-cost bionic strategy for the preparation of high-performance biomass adhesives.
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