基于BP/Cu纳米复合材料沉积的抗菌棉织物的制备及性能研究OA

In recent years,the growing demand for health protection has driven research towards developing efficient,safe,and durable antibacterial textiles.Traditional antibacterial materials,such as silver nanoparticles and quaternary ammonium compounds,face limitations including high cost,environmental toxicity,and insufficient durability.Black phosphorus(BP),an emerging two-dimensional nanomaterial possessing a tunable bandgap(0.3-2.0 eV),good biocompatibility,and excellent photothermal properties,exhibits significant potential.Its layered structure and sharp edges can directly disrupt bacterial membranes,while light irradiation enables the generation of reactive oxygen species(ROS)to further enhance antibacterial performance.Copper nanoparticles(CuNPs)are known for their broad-spectrum antibacterial activity,low biotoxicity,and cost-effectiveness.Research indicates that combining BP and Cu can synergistically improve both antibacterial efficacy and stability,yet their application in textiles and long-term performance require systematic investigation. This study prepared two-dimensional black phosphorus nanosheets(BPNs)via liquid-phase ultrasonic exfoliation and constructed BP/Cu nanocomposites through a one-step reduction method,anchoring CuNPs onto the BPN surfaces.The cotton fabric was subsequently surface-modified with L-cysteine(L-cys).By utilizing the coordination between the amino/thiol groups of L-cys and the BP/Cu nanocomposites,the material was stably immobilized onto the fiber surfaces.Characterization results confirmed the successful construction of the composites:SEM indicated that the prepared BPNs were ultrathin;XRD and Raman spectroscopy verified the formation of BP/Cu composites;SEM further revealed a distinct filamentous structure on the L-cys modified cotton fibers and a uniform distribution of BP/Cu nanoparticles after loading.EDS confirmed homogeneous distribution of P and Cu elements,FTIR indicated esterification between L-cys and the fibers,and the characteristic Cu diffraction peaks in XRD patterns validated the successful incorporation of copper nanoparticles.Antibacterial assessments,including inhibition zone tests and antibacterial rate measurements,demonstrated that the modified fabric achieved inhibition rates exceeding 99%against both E.coli and S.aureus.This performance was significantly superior to that of single-component counterparts,attributable to a triple mechanism involving physical disruption,oxidative stress,and metal ion toxicity.After 20 washing cycles,the inhibition rate remained above 95%,indicating excellent durability.Meanwhile,the modification had a limited impact on the fabric's mechanical and comfort properties:the breaking strength decreased by approximately 9.8%,while the air permeability and moisture permeability were maintained at 85.1%and 89.2%of their original values,respectively.In terms of hand feel,the fabric stiffness slightly increased from 23.3 to 24.4 and 25.5,while softness slightly decreased to 77.2 and 76.9,with minimal change in smoothness.Furthermore,after 10 000 rubbing cycles,the fabric exhibited enhanced abrasion resistance while retaining stable antibacterial performance.In summary,this study successfully developed a functionalized cotton fabric based on BP/Cu nanocomposites,achieving an optimal balance between highly efficient,durable antibacterial properties and wearing comfort.This study provides a new pathway for developing low-cost,low-environmental-impact,and durable antibacterial textiles.