Electrospun PAN–GO composite nanofibers as water purification membranes

Lee, Jeonghun; Yoon, Jaehan; Kim, Jun‐Hyun; Lee, Taegwan; Byun, Hongsik

doi:10.1002/app.45858

Cited by 72 publications

(55 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We have also evaluated the particulate filtration performance of the ZPC‐Ag membrane by using a simple custom made dead‐end filtration set up (Supporting Information Section 7, Figure S8). DI water containing polystyrene beads (size: 1.1 μm mean diameter) was made to pass through the membrane by applying a constant pressure of 0.8 bar and water flux is calculated . It is observed that the ZPC‐Ag membrane effectively filtered out the polystyrene beads which are seen accumulated on the surface of the nanofibers (Supporting Information Section 7, Figure S9).…”

Section: Resultsmentioning

confidence: 99%

Engineering silver‐zwitterionic composite nanofiber membrane for bacterial fouling resistance

Ganesh

Kundukad

Cheng

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

Bacterial attachment and fouling compromise material performance in applications ranging from marine equipment and biomedical devices to water treatment systems. For membrane‐based water treatment systems, bacterial attachment and biofilm formation decrease water purification efficiency and reduces mechanical durability of the membranes. In this work, we present a concurrent electrospinning and copolymerization approach to engineer composite nanofiber membranes comprising of silver nanoparticle containing poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP‐Ag) nanofibers and [copolymerized zwitterionic sulfobetaine methacrylate‐methacryl polyhedral oligomeric silsesquioxane]‐poly(methyl methacrylate) nanofibers. We characterized the surface morphology, topography, material chemistry, and wettability of the nanofiber membranes with scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, and contact angle measurements. We then challenged these nonwoven membranes with two model microbes, Gram‐negative Pseudomonas aeruginosa and Gram‐positive Staphylococcus aureus, and found that the silver‐zwitterionic composite nanofiber membrane exhibited superior bacterial fouling resistance by reducing >90% of bacterial attachment when compared to neat PVDF‐HFP and PVDF‐HFP‐Ag nanofiber membranes. This study demonstrates that concurrent electrospinning enables free‐standing nanofiber membranes with sustained bacterial fouling resistance, with potential in applications in filtration and water treatment technologies for which antifouling strategies are imperative. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47580.

show abstract

Section: Resultsmentioning

confidence: 99%

Engineering silver‐zwitterionic composite nanofiber membrane for bacterial fouling resistance

Ganesh

Kundukad

Cheng

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Without heat treatment, all the as-spun PAN fibrous membranes showed a superhydrophilic surface (insets in Figure 1b,c), which is similar to the literature reports. [44,45] For PAN-1060 and PAN-450, the water contact angle (WCA) was 4.3° ± 0.9° and 2.7° ± 0.4°, respectively. When the PAN fibrous membrane was subjected to the heat treatment, no obvious change was found in fiber morphology except for surface wettability.…”

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

Novel Water Harvesting Fibrous Membranes with Directional Water Transport Capability

Zhou

Wang

et al. 2019

Adv Materials Inter

View full text Add to dashboard Cite

properties assisted in moisture absorption. The Namib Desert beetles and Texas horned lizard collect dew using their bumpy body surface with alternating regions of hydrophilic and hydrophobic, and the honeycomb structures on the scale increase condensation foci. [3][4][5][6] These excellent water harvesting creatures elucidate the critical role of wettability irregularity and hierarchical structure gradient in guiding water transport. [7] Inspired by nature, researchers have developed artificial water harvesters, [7][8][9][10][11][12][13][14][15][16][17][18] such as water collecting filaments and hydrophobichydrophilic patterned fog collectors. [19][20][21][22] However, most of the water harvesters developed so far are based on either a 2D surface or a 1D filament.Recently, researchers have uncovered that porous membranes with wettability gradient or wettability contrast in thickness direction can have a "smart" directional wicking effect, which enables water to transfer automatically across the membrane just in one direction. [23][24][25][26][27][28][29][30] Our previous works have reported the preparation of hydrophobic-to-hydrophilic gradient fabrics that can guide directional water-transport from the hydrophobic to the hydrophilic side. [31,32] Such a unidirectional water penetration phenomenon was also reported by other researchers. In research literatures, the directional water transport was also termed "one-way water transport," "directional wicking," [33][34][35] or "water diode." [36][37][38][39][40] Almost all the directional water transport membranes have a hydrophobic layer on one side and a hydrophilic layer on the other, a typical feature of Janus membranes. However, not all Janus membranes have a directional wicking property because Janus membranes might have bidirectional or nonwicking properties, depending on the hydrophobic/hydrophilic combination layout. [36,38,39] Despite the reports about the preparation and applications of directional wicking porous media, limited attention has been devoted to using them for water harvesting.Herein, we report a novel finding about harvesting water from air using hydrophobic/superhydrophilic directional wicking nanofibrous membranes. A two-step electrospinning method was employed to prepare directional wicking fibrous membranes using polyacrylonitrile (PAN) as a starting material. The directional wicking membranes were found to have much larger water harvesting capacity than those with homogeneous wettability and the same fibrous structure. The porous structure and pore dimension also contributed to water harvesting.Previous studies about water harvesting from airborne moisture, which is driven by a directional water transport principle, are based on either a 2D surface or a 1D filament. Porous membranes with a directional water transport capability are seldom used for water harvesting. Herein, a novel hydrophobic/ hydrophilic directional-wicking nanofibrous membrane is reported showing enhanced water harvesting ability. In comparison to the hydrophobic or hy...

show abstract

“…The BSA studies are also beneficial to assess the anti-fouling assets of the materials. The findings were associated with cellulose acetate and PAN conventional ENMs to prove efficacy in aqueous filtration [107]. GO-PAA hydrogel nanocomposites have also been formed utilizing cross-linking chemistry.…”

Section: Multicomponent Electrospun Polymer Nanofiber Membranesmentioning

confidence: 99%

Electrospun polymeric nanofibrous membranes for water treatment

Snowdon¹,

Liang²

2018

Preprint

View full text Add to dashboard Cite

A necessity for water filtration technology, due to global pollution and population growth, has led to an increase in attention to advanced nanomaterials that can aid in the purification of air and water. This size-dependent filtration is possible via nanofibrous membranes as they contain high porosity and this pore size is tunable through the fabrication process. Because of this tunability in the nanofibril membrane composition and structure, they possess promising straining abilities, such as high permeability and selectivity, as well as low fouling. There are a variety of polymer blends or organic/inorganic nanofillers that can be used depending on filtration needs. The production of nanofibers consists of various avenues such as synthetic templates, separation by different phases, nanoparticle self-assembly, and most widespread, electrospinning. Electrospinning is prevalent owing to its ease of use and low cost compared to template and self- assembly processes. This chapter describes the multifaceted progression governing electrospinning and its working factors as well as the environmental settings that form nanofibers and their resultant membranes. Additionally, the various designs of electrospinning apparatuses' and review of the methods used to prepare multifunctional composite electrospun nanofibrous membranes will be discussed. Past achievements and current challenges will be provided. Conclusions and perspectives are specified fitting to studied progress so far as well as future needs with regards to water treatment, with a particular focus on industrial applications.

show abstract

Electrospun PAN–GO composite nanofibers as water purification membranes

Cited by 72 publications

References 45 publications

Engineering silver‐zwitterionic composite nanofiber membrane for bacterial fouling resistance

Engineering silver‐zwitterionic composite nanofiber membrane for bacterial fouling resistance

Novel Water Harvesting Fibrous Membranes with Directional Water Transport Capability

Electrospun polymeric nanofibrous membranes for water treatment

Contact Info

Product

Resources

About