Preparation of silver nanoparticle functionalized aramid fiber by employing dopamine and silane coupling agent modification

Abstract

Silver nanoparticles functionalized poly-p-phenylene terephthamide (PPTA) fiber was fabricated through the electroless plating method. To facilitate the efficient deposition of silver nanoparticles, the PPTA fiber surface was modified by using dopamine and γ-methacryloxypropyl trimethoxy silane (MPTES).Various techniques including scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) were used to characterize the surface morphology and chemical composition of surface modified and silver-plated PPTA fibers. The silver-plated PPTA fiber showed a surface resistance of 0.53 Ω over a length of 1 cm with reliable coating fastness under ultrasonic washing and high temperature treatment. Furthermore, the silverplated PPTA fiber exhibited antibacterial resistance against Escherichia coli and Staphylococcus aureus, as well as good electrical heating performance with surface temperature of 100.4 C at a voltage of 4.5 V.

Preparation of a coating solution for antibacterial Ag nanoparticle layers

“…5),6) Several methods have been proposed to impart antibacterial activity by surface-modification of target materials, including sputtering, 7),8) thermal spraying, 9) coating of sol-gel films, 10) coating of hydrogel containing AgNPs, 11) electrodeposition, 12) ionizing radiation, 13) adsorption of AgNPs on polydopamine surface coating layer, 14)-16) and adsorption of AgNPs onto modified solid surfaces with silane coupling agents. 16)-18) However, these methods require large-scale equipment and involve complex processing. Therefore, it is convenient and practical to immobilize a layer of AgNPs onto a substrate by simply applying and drying a colloidal solution of AgNPs.…”