Immobilization of Graphene Oxide on the Permeate Side of a Membrane Distillation Membrane to Enhance Flux

Intrchom, Worawit; Roy, Sagar; Humoud, Madihah Saud; Mitra, Somenath

doi:10.3390/membranes8030063

Cited by 34 publications

(17 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These enhanced the hydrophilicity of the membranes. This is in line with the previous publications [23,31,33]. For the MTBE solution, the contact angle for all membranes reduced as expected due to incorporation of the organic moiety in the aqueous solution, which decreased surface tension and eventually led to lower contact angles.…”

Section: Resultssupporting

confidence: 92%

“…However, they tend to be very hydrophobic, and show little affinity for MTBE. We have reported a membrane modification approach using carbon nanotubes (CNTs), f-CNTs and GO [29][30][31][32][33] to improve the characteristics of the membrane, and have shown an excellent adsorption and transport of solutes, leading enhanced flux and selectivity in desalination, as well as the separation of organic solvents from aqueous mixtures [21,23,31]. Although several techniques have been tested for MTBE removal from aqueous solution, few studies have investigated the removal using vacuum MD [34,35].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Removal and Recovery of Methyl Tertiary Butyl Ether (MTBE) from Water Using Carbon Nanotube and Graphene Oxide Immobilized Membranes

2020

Self Cite

View full text Add to dashboard Cite

Methyl tert-butyl ether (MTBE) is a widely used gasoline additive that has high water solubility, and is difficult to separate from contaminated ground and surface waters. We present the development in functionalized carbon nanotube-immobilized membranes (CNIM-f) and graphene oxide-immobilized membranes (GOIM) for enhanced separation of MTBE via sweep gas membrane distillation (SGMD). Both types of modified membranes demonstrated high performance in MTBE removal from its aqueous mixture. Among the membranes studied, CNIM-f provided the best performance in terms of flux, removal efficiency, mass transfer coefficients and overall selectivity. The immobilization f-CNTs and GO altered the surface characteristics of the membrane and enhanced partition coefficients, and thus assisted MTBE transport across the membrane. The MTBE flux reached as high as 1.4 kg/m2 h with f-CNTs, which was 22% higher than that of the unmodified PTFE membrane. The maximum MTBE removal using CNIM-f reached 56% at 0.5 wt % of the MTBE in water, and at a temperature of 30 °C. With selectivity as high as 60, MTBE recovery from contaminated water is very viable using these nanocarbon-immobilized membranes.

show abstract

Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Removal and Recovery of Methyl Tertiary Butyl Ether (MTBE) from Water Using Carbon Nanotube and Graphene Oxide Immobilized Membranes

2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The mass transport in the MD process has a diffusive character; therefore, the thickness of diffusion layer (mass transfer resistance) is reduced when the membrane is surface-wetted ( Figure 1). Moreover, the wetting of surface pores facilitates the vapor condensation (on the distillate side) which additionally increases the permeate flux [32]. The partial wetting of the surface pores also changes the shape of the meniscus over the pores inside the membrane wall [2], which changes the rate of evaporation.…”

Section: Water Desalination By MDmentioning

confidence: 99%

Capillary Polypropylene Membranes for Membrane Distillation

Gryta

2018

Fibers

View full text Add to dashboard Cite

Only nonwetted porous membranes can be used in membrane distillation. The possibility of application in this process the capillary polypropylene membranes manufactured by thermallyinduced phase separation was studied. The performance of a few types of membranes available commercially was presented. The resistance of the membranes to wetting was tested in the continuous process of water desalination. These studies were carried out for 1000 h without module cleaning. The presence of scaling layer on the membranes surface was confirmed by Scanning Electron Microscope observations. Both the permeate flux and distillate conductivity were almost not varied after the studied period of time, what indicates that the used membranes maintained their nonwettability, and the negative influence of scaling was limited. The role of surface porosity on the pore wetting and influence of membrane wettability on the quality of the distillate obtained were discussed.

show abstract

“…[22] Another work describes the immobilization of GO on the permeate side of a commercial polypropylene-supported PTFE membrane and shows a water vapor flux of 64.5 kg m −2 h −1 under direct contact membrane distillation. [23] Furthermore, having oxygen-containing functional groups such as phenolic hydroxyl, COH (tertiary alcohol on the basal plane), carboxyl, quinone, lactone, ketone, and epoxy, [24] GO can be chemically modified. For example, GO can be modified into graphene initiators for the use in surface-initiated polymerization.…”

Section: Introductionmentioning

confidence: 99%

“…[ 22 ] Another work describes the immobilization of GO on the permeate side of a commercial polypropylene‐supported PTFE membrane and shows a water vapor flux of 64.5 kg m −2 h −1 under direct contact membrane distillation. [ 23 ]…”

Section: Introductionmentioning

confidence: 99%

SI‐ATRP Polymer‐Functionalized Graphene Oxide for Water Vapor Separation

Aliyev

Shishatskiy

Abetz

et al. 2020

Adv Materials Inter

View full text Add to dashboard Cite

considerable attention since 1980. [5] Despite the significant attention paid to the improvement of properties, most of the polymers studied did not exceed the Robeson upper bound, and none of them found use in the efficient separation system. [6] To obtain higher permeability and better selectivity, several approaches have been implemented, such as thermal rearrangement of the polymers, [7] formation of mixed matrix membranes (MMMs) by incorporation of metal-organic frameworks (MOFs), [8] covalent organic frameworks (COFs), [9] and other fillers into the polymer matrix. Every year, the drinking water demand increases, and thus energy-efficient water separation becomes more and more significant in terms of safe water supply in the world. Since we need to supply the world population with drinkable water from salty ocean, seas, and brackish water, water needs to be separated from its constituents such as salts, organic compounds, and bacteria. The primary membrane separation methods used widely for this purpose are forward osmosis (FO), reverse osmosis (RO), ultrafiltration (UF), nanofiltration (NF), microfiltration (MF), and electrodialysis reversal desalination (ERD). As a robust and low-energy-consuming technique, membrane distillation (MD) has recently received extensive attention. For this purpose, hydrophobic microporous polymeric membranes based on polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polypropylene (PP), etc., are implemented. In MD, a hot water stream circulates on the surface of the hydrophobic membrane, while only water vapor can pass through the porous structure of the membrane. The separated water vapor afterwards condenses on cold surfaces. Lee et al. reported that an electrospun perfluorooctyltriethoxysilane-coated titanium dioxide/polyvinylidene fluoride-co-hexafluoropropylene (F-TiO 2 /PVDF-HFP) membrane showed superhydrophobicity and a high water flux of 40 L m −2 h −1 compared to pristine PVDF membranes, [10] while the water flux of the PVDF nanofibrous hydrophobic membranes reinforced with fabric substrate was 49 kg m −2 h −1. [11] Being a 2D material, graphene oxide (GO) has attracted extensive attention in membrane science as a potential material due to its mechanical strength, [12] the possibility for property alteration by covalent and noncovalent chemical bonding, [13] and its cost-effective production. Recent works [14] show how GO incorporation affects the selectivity of polyimide-and Graphene oxide is functionalized with poly(2-diethylaminoethyl) methacrylate (PDEAEMA), and the resulting material is used as a selective layer of a thin-film composite membrane (TFCM). The polymer synthesis is carried out by surfaceinitiated atom transfer radical polymerization (SI-ATRP) from bulk and also from single-layer graphene oxide (GO). The polymer brushes synthesized by the "grafting from" method are characterized by size exclusion chromatography (SEC), nuclear magnetic resonance spectroscopy (NMR), Fourier-transform infrared (FTIR) spectroscopy, thermal gravimetric analys...

show abstract

Immobilization of Graphene Oxide on the Permeate Side of a Membrane Distillation Membrane to Enhance Flux

Cited by 34 publications

References 58 publications

Removal and Recovery of Methyl Tertiary Butyl Ether (MTBE) from Water Using Carbon Nanotube and Graphene Oxide Immobilized Membranes

Removal and Recovery of Methyl Tertiary Butyl Ether (MTBE) from Water Using Carbon Nanotube and Graphene Oxide Immobilized Membranes

Capillary Polypropylene Membranes for Membrane Distillation

SI‐ATRP Polymer‐Functionalized Graphene Oxide for Water Vapor Separation

Contact Info

Product

Resources

About