Electrospun polyacrylonitrile nanofibrous membranes supported with montmorillonite for efficient PM2.5 filtration and adsorption of Cu (II) ions

Abstract

In this study, we have fabricated polyacrylonitrile/montmorillonite (PAN/Mt) nanofibrous nanocomposites with variation in concentration of Mt from 0.25% to 1.00%. The electrospinning process developed PAN/Mt nanofibrous nanocomposites having reduced fiber diameters and high surface roughness as observed in Field emission scanning electron microscopy. The nanocomposite nanofibers were characterized by X‐ray diffraction (XRD) and thermogravimetric analyzer for intercalation and thermal stability respectively. PAN/Mt nanofibrous nanocomposites were tested for their water vapor transmission rate, air permeability, burst strength, and tensile strength. The filtration efficiency of 0.75% PAN/Mt nanofibrous nanocomposite was found to be 98.7% for PM2.5 particles present in air with a pressure drop of 46.8 Pa. The adsorption of copper (II) (Cu (II)) ions using 0.75% PAN/Mt nanofibrous nanocomposites has also been studied. The effect of contact time and initial concentration of adsorbent on the adsorption of Cu (II) ions have been analyzed. It was found that the PAN/Mt nanofibrous membranes follows pseudo‐second‐order kinetic model and Langmuir adsorption isotherm for the adsorption of Cu (II) ions from aqueous solutions. This study suggests the potential implication of PAN/Mt nanofibrous nanocomposites for filtration of PM2.5 and adsorption of metal ions.

ZnO-PLLA/PLLA Preparation and Application in Air Filtration by Electrospinning Technology

“…In addition, the filtration capacity of the film loaded with 5% ZnO-PLLA was significantly better than that of the other components. This is due to the diffusion mechanism of nanoparticle filtration, where the ZnO nanoparticles grafted on PLLA take up part of the gap in the used mask, leading to an increase in filtration [35]. This implies that the grafting of nano ZnO is very effective in enhancing the filtration performance of the ZnO-PLLA/PLLA films.…”

Efficient selective methylene blue adsorption by polyurethane/montmorillonite‐based antifouling electrospun composite membranes

“…11 Among the membranes, electrospun membranes are highly versatile because of their high porosity, ease of surface functionalization, tunable fiber diameter, high surface area-to-volume ratio, fabrication flexibility, and enhanced filtration ability. 12 However, fouling on polymer electrospun membranes is a serious problem in water filtration applications as well as dye removal from wastewater. 13 It reduces water permeability and, hence, purification efficiency.…”

“…Among the various adsorbent materials, polymer membranes have gained much attention in dye adsorption due to their high sorption efficiency, cost‐effectiveness, and lack of secondary pollution 11 . Among the membranes, electrospun membranes are highly versatile because of their high porosity, ease of surface functionalization, tunable fiber diameter, high surface area‐to‐volume ratio, fabrication flexibility, and enhanced filtration ability 12 …”

Recyclable Composite Membrane of Polydopamine and Graphene Oxide-Modified Polyacrylonitrile for Organic Dye Molecule and Heavy Metal Ion Removal

“…XPS spectra peak position of C1s, N1s and O1s and atomic ratios of PAN/GO NFMs and PAN/GO/PDA NFMs, Table S4. Comparison of mechanical properties of PAN/GO-PDA composite membranes and other typically reported electrospinning membranes [ 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 ], Table S5. Comparison of the maximum adsorption capacities (q m , mg/g) toward MB and EBT between the adsorbent reported in literature and the composite PAN/GO/PDA nanofiber membrane in this work.…”