AgNP-AC Composite Fibers and its Adsorption and Antibacterial Properties

Abstract

In this study, the electrospinning method was used to prepare silver nanoparticle–activated carbon (AgNP-AC) composite nanofiber membranes, aiming to obtain a high-performance dual-functional filter composite fiber membrane with good antibacterial and adsorption properties. A scanning electron microscope (SEM), X-ray diffractometer (XRD), and other instruments were used to characterize the morphology and structure of the composite nanofibers. The effects of different concentrations of activated carbon, silver, and polymer (polyethylene–vinyl alcohol—EVOH) on the fiber morphology were discussed. The adsorption performance and antibacterial performance of the composite fiber membrane were investigated to verify the mutual influence of silver and activated carbon. The results show that with the increase in the activated carbon and silver concentration, the fiber diameter of the AgNP-AC membrane increase and the diameter distribution tends to become uniform. When the mass fraction of polymer EVOH is 10% and the concentration ratio of silver nitrate and carbon is 0.05 and 0.085 (g/ml), the adsorption performance of the composite fiber membrane is at the best with an adsorption rate of 94.07%. The AgNP-AC composite nanofiber membrane also demonstrates a good antibacterial function against Staphylococcus aureus and is most effective in the first 8 h. However, it is found that the silver concentration is proportional to the antibacterial ability, but the activated carbon has a certain inhibitory effect on the antibacterial properties.

Design of Nanohydroxyapatite/Pectin Composite from Opuntia Ficus-Indica Cladodes for the Management of Microbial Infections

“…The pectin spectrum exhibits a band at 3335 cm −1 corresponding to the stretching of the hydroxyl group and a peak at 2929 cm −1 corresponding to the vibration of the CH. The carbonyl (C=O) stretching vibration of the esterified carboxyl groups is shown by the 1731 cm −1 peak [ 29 , 31 ]. The signal at 1614 cm −1 could be attributable to carboxyl carbonyl stretching vibration.…”

“…The strains are composed of Gram-negative and Gram-positive types. The antibacterial efficacy test was done using a micro-dilution method [ 29 ]. In this study, several bacterial suspensions were brought in sterile saline with a concentration of 1.0 × 105 CFU/mL.…”

Investigation on the mechanical properties of composite fiber membranes with different concentration of EVOH/Ag/AC

“…The reason that EVOH was selected as the basic material for the nanofiber scaffold is due to its good mechanical strength, elasticity and biodegradability [15] which is a better choice for packaging, medical, film materials, etc. The adsorption and antibacterial properties of AgNPs-AC EVOH composite fiber membrane have been verified in previous study [16]. However, the mechanical properties of a membrane should also be considered as a standard for evaluating practical application [17].…”

Activated Carbon-Enriched Electrospun-Produced Scaffolds for Drug Delivery/Release in Biological Systems

“…Filling fibers with AC appears to be a promising approach for targeted or long-term drug delivery from electrospun fibers. AC-enriched scaffolds, produced by electrospinning (ES), were offered for drinking water production [ 10 ]; the adsorption of metal ions, such as Cr(VI) [ 11 ], As(III) [ 12 ] and Cu(II) [ 13 ]; the elimination of dyes, such as methyl orange [ 11 ], methylene blue and Congo red [ 14 ]; removing natural organic molecules from different solutions [ 15 ]; and for oil spill treatment [ 16 ]. AC-enriched scaffolds were tested as filters [ 17 ] from chemical and biological warfare agents and as protective clothing [ 18 ].…”

“…Enrichment of the scaffolds with AC was also shown to increase UV-shielding properties [ 19 ]. Many studies apply AC in polyacrylonitrile or cellulose acetate nanofibers and intended for the extraction of pollutants from environmental samples [ 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. When packed in the previously mentioned polymers, as well as polystyrene and poly(L-lactide), AC retains its adsorption capacity [ 10 , 19 ].…”