Wood composites represent one kind of sustainable functional materials for interior decoration and packaging, but their tendency to generate static electricity poses discomfort and potential fire hazards. To address this huge challenge, we herein report a strong, conductive, nanostructured formaldehyde-free soy protein-based adhesive by mixing nanocellulose and tannic acid functionalized MXene, and soy protein, which is then used to create antistatic and fire-extinguishing wood composites. The resulted soy protein-based adhesive exhibited an exceptional bonding capability due to its bionic organic-inorganic hybridized crosslinking structure. With this soy protein-based adhesive, as-prepared wood composites achieved a static flexural strength of 14.08 MPa, meeting the demanding interior use requirement. Because of the presence of both MXene and quaternary ammonium salt in the adhesive, the resultant wood composite shows an electrical resistance of 3.123 × 10 Ω·cm, satisfying the antistatic requirements for wood-based composites, and a desired self-extinguishing ability. This work offers a promising strategy to create strong nanostructured bio-adhesive, which can be used for producing multifunctional wood composites as decoration and packaging materials.

中文翻译：

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仿生强纳米结构大豆蛋白基粘合剂可实现抗静电和自熄性木基复合材料

木质复合材料是一种用于室内装饰和包装的可持续功能材料，但其产生静电的倾向会带来不适和潜在的火灾危险。为了应对这一巨大挑战，我们在此报告了一种强效、导电、纳米结构的无甲醛大豆蛋白基粘合剂，通过混合纳米纤维素和单宁酸功能化 MXene 以及大豆蛋白，然后用于制造抗静电和灭火木质复合材料。所得到的大豆蛋白基粘合剂由于其仿生有机-无机杂化交联结构而表现出优异的粘合能力。使用这种大豆蛋白基粘合剂，所制备的木质复合材料的静态弯曲强度达到14.08 MPa，满足严格的室内使用要求。由于粘合剂中同时存在MXene和季铵盐，所得木质复合材料的电阻为3.123×10Ω·cm，满足木质复合材料的抗静电要求，并具有理想的自熄性。这项工作提供了一种有前景的策略来制造强效纳米结构生物粘合剂，可用于生产作为装饰和包装材料的多功能木质复合材料。