Key Laboratory of Wood Material Science and Application, Ministry of Education, Beijing Forestry University, Beijing 100083, China; Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA.
Carbohydr Polym. 2023 Nov 1;319:121093. doi: 10.1016/j.carbpol.2023.121093. Epub 2023 Jun 5.
Developing multifunctional adhesives with exceptional cold-pressing strength, water resistance, toughness, and mildew resistance remains challenging. Herein, inspired by oysters, a multifunctional organic-inorganic hybrid soybean meal (SM)-based adhesive was fabricated by incorporating amino-modified carbon dots functionalized silica nanoparticles (CDs@SiO) and dialdehyde chitosan (DCS) into SM matrix. DCS effectively enhanced the interface interactions of organic-inorganic phases and the rigid nanofillers CDs@SiO uniformly dispersed in the SM matrix, which provided energy dissipation to improve the adhesive's toughness. Owing to the stiff skeleton structure and enhanced crosslinking density, the crosslinker-modified SM (MSM)/DCS/CDs@SiO-2 wood adhesive exhibited outstanding cold-pressing strength (0.74 MPa), wet shear strength (1.36 MPa), and long-term water resistance (49 d). Additionally, the resultant adhesive showed superior antimildew and antibacterial properties benefiting from the introduction of DCS. Intriguingly, the fluorescent properties endowed by carbon dots further broadened the application of adhesives for realizing security testing. This study opens a new pathway for the synthesis of multifunctional biomass adhesives in industrial and household applications.
开发具有优异冷压强度、耐水性、韧性和防霉性的多功能胶粘剂仍然具有挑战性。受牡蛎启发，本文通过将氨基改性碳点功能化二氧化硅纳米粒子（CDs@SiO）和壳聚糖二醛（DCS）掺入大豆蛋白粉（SM）基质中，制备了一种多功能有机-无机杂化大豆蛋白粉基胶粘剂。DCS 有效增强了有机-无机相的界面相互作用和刚性纳米填料 CDs@SiO 在 SM 基质中的均匀分散，从而提供了能量耗散来提高胶粘剂的韧性。由于交联剂改性 SM（MSM）/DCS/CDs@SiO-2 木材胶粘剂具有刚性骨架结构和增强的交联密度，因此表现出优异的冷压强度（0.74 MPa）、湿剪切强度（1.36 MPa）和长期耐水性（49 d）。此外，由于引入了 DCS，所得胶粘剂还具有优异的防霉和抗菌性能。有趣的是，碳点赋予的荧光性能进一步拓宽了胶粘剂在实现安全检测方面的应用。本研究为工业和家庭应用中多功能生物质胶粘剂的合成开辟了新途径。
