Cao Tiantian, Zhou Yan, Wang Lili, Zhang Jun, Zhao Bing
Suzhou Institute of Trade & Commerce, 287 Xuefu Road, Suzhou 215009, China.
Suzhou Institute of Trade & Commerce, 287 Xuefu Road, Suzhou 215009, China.
Int J Biol Macromol. 2025 Jun;315(Pt 1):144414. doi: 10.1016/j.ijbiomac.2025.144414. Epub 2025 May 19.
The conventional antimicrobial treatment process for cellulose based fabrics such as cotton fabrics faces significant challenges, including suboptimal durability of antimicrobial coatings and degraded mechanical properties of textiles after treatment. Herein, an antimicrobial adhesive of silver and copper composite nanoparticles (AgCuNPs) was prepared by simultaneous in-situ reduction of Ag and Cu in the presence of waterborne polyurethane (WPU). The synthesized AgCuNP glue exhibited an average particle size as low as 2.1 nm, a zeta potential as high as -64.8 mV at the optimum mass ratio of WPU to AgCu of 9:1, and high adhesion strength to cellulose, which ensured good wash resistance of AgCuNPs. WPU was found to form a closed film on the surface of cotton fibers, thereby providing AgCuNPs with adequate adhesion strength. In addition, AgCuNP-coated cotton fabric as low as 100 mg/kg showed ~100 % antibacterial rates against Escherichia coli and Staphylococcus aureus after 50 washes, indicating excellent washability. Finally, the 100 mg/kg of coated cotton fabric showed good resistance to abrasion and sunlight exposure, good biocompatibility, and enhanced mechanical properties. The tensile strength and hydrophobicity of AgCuNP-coated cotton fabric were improved after treatment, probably because the penetration of WPU into the yarn improved fiber cohesion.
传统的基于纤维素的织物（如棉织物）抗菌处理工艺面临重大挑战，包括抗菌涂层耐久性欠佳以及处理后纺织品机械性能下降。在此，通过在水性聚氨酯（WPU）存在下同时原位还原银和铜，制备了一种银和铜复合纳米颗粒（AgCuNPs）抗菌粘合剂。合成的AgCuNP胶水在WPU与AgCu的最佳质量比为9:1时，平均粒径低至2.1 nm，zeta电位高达-64.8 mV，对纤维素具有高粘附强度，这确保了AgCuNPs具有良好的耐洗性。发现WPU在棉纤维表面形成封闭膜，从而为AgCuNPs提供足够的粘附强度。此外，100 mg/kg的AgCuNP涂层棉织物在50次洗涤后对大肠杆菌和金黄色葡萄球菌的抗菌率约为100%，表明具有优异的耐洗性。最后，100 mg/kg的涂层棉织物表现出良好的耐磨性和耐阳光照射性、良好的生物相容性以及增强的机械性能。处理后，AgCuNP涂层棉织物的拉伸强度和疏水性得到改善，这可能是因为WPU渗透到纱线中提高了纤维凝聚力。
