材料科学
胶粘剂
氮化硼
复合材料
剥脱关节
壳聚糖
蜘蛛丝
化学工程
纳米复合材料
抗剪强度(土壤)
石墨烯
纳米技术
丝绸
图层(电子)
土壤水分
土壤科学
工程类
环境科学
作者
Jianzhang Li,Ying Chen,Fudong Zhang,Yan Lyu,Xiaona Li,Kuang Li,Jianzhang Li
标识
DOI:10.1016/j.cej.2022.135442
摘要
• Spider silk-inspired high-performance soybean meal-based adhesive is reported. • CS@BNNSs were greenly and cost-effectively produced via mechanochemical exfoliation. • Dense intermolecular interactions were formed between CS@BNNSs and the adhesive matrix. • Such interactions endow the adhesive with high adhesion strength and toughness. • Integrated excellent mold resistance and flame retardancy is achieved. A facile and environment-friendly bionic strategy is developed to construct high-performance soybean meal (SM)-based multifunctional adhesives by using chitosan-functionalized boron nitride nanosheets (CS@BNNSs) as an alternative to β -sheet nanocrystals to mimic the structural characteristics of natural spider silks. CS@BNNSs were cost-effectively and greenly produced from bulk hexagonal boron nitride through chitosan-assisted mechanochemical exfoliation. Compared with the neat crosslinker-modified SM-based adhesive (MSM), the fabricated adhesive (MSM/CS@BNNSs) features remarkable improvement in mechanical performance, such as enhanced wet shear strength (1.31 MPa vs. 0.58 MPa), work of debonding (0.366 J vs. 0.186 J), and dry shear strength (1.96 MPa vs. 1.42 MPa). The outstanding performance is attributable to the dense covalent/non-covalent intermolecular interactions and good compatibility between CS@BNNSs and the SM matrix, which are beneficial to the dissipation and transfer of energy under loading. In addition, the MSM/CS@BNNSs adhesive exhibits noticeably improved flame retardancy and excellent anti-mildew performance compared with the neat SM-based adhesives, and its shelf life reaches up to 72 h. Such an advanced MSM/CS@BNNSs adhesive reaches the engineering resin level and possesses promising potentials for industrial applications. Overall, this facile and efficient spider silk-mimicking structural design strategy assisted by a green and low-cost mechanochemical exfoliation would provide endless inspirations for constructing and reinforcing multifunctional bio-based adhesives, elastomers, and plastic materials.
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