Polyacrylic acid-brushes tethered to graphene oxide membrane coating for scaling and biofouling mitigation on reverse osmosis membranes

Ansari, Ali; Peña-Bahamonde, Janire; Wang, Meng; Shaffer, Devin L.; Hu, Yandi; Rodrigues, Débora F.

doi:10.1016/j.memsci.2021.119308

Cited by 44 publications

(19 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peak at 3400 cm −1 indicates the existence of the O–H functional group from the surface-bounded H 2 O molecules. The peaks at 2237 cm −1 , 1641 cm −1 , and 1559 cm −1 are apportioned to the C≡N groups, C=C bonds and N–H bending of NBR, respectively [ 42 ]. The peak at 1442 cm −1 confirms the occurrence of carboxylic acid O-H stretching while C-O bending is denoted by 969 cm −1 peak [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

Development of Environment-Friendly Membrane for Oily Industrial Wastewater Filtration

et al. 2021

View full text Add to dashboard Cite

Latex phase blending and crosslinking method was used in this research work to produce nitrile butadiene rubber-graphene oxide (NBR-GO) membranes. This fabrication technique is new and yields environmentally friendly membranes for oil-water separation. GO loading was varied from 0.5 to 2.0 part per hundred-part rubber (pphr) to study its effect on the performance of NBR-GO membrane. GO was found to alter the surface morphology of the NBR matrix by introducing creases and fold on its surface, which then increases the permeation flux and rejection rate efficiency of the membrane. X-Ray diffraction analysis proves that GO was well dispersed in the membrane due to the non-existence of GO fingerprint diffraction peak at 2θ value of 10–12° in the membrane samples. The membrane filled with 2.0 pphr GO has the capability to permeate 7688.54 Lm−2 h−1 water at operating pressure of 0.3 bar with the corresponding rejection rate of oil recorded at 94.89%. As the GO loading increases from 0.5 to 2.0 pphr, fouling on the membrane surface also increases from Rt value of 45.03% to 87.96%. However, 100% recovery on membrane performance could be achieved by chemical backwashing.

show abstract

Section: Resultsmentioning

confidence: 99%

Development of Environment-Friendly Membrane for Oily Industrial Wastewater Filtration

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The initial concentration of bacteria in the LB media was in the range of ~3.0 × 10 7 CFU/ml (OD 600 = 0.60). The details of the microbial biofilm growth were described in our previous study (Nguyen et al, 2017a;Ansari et al, 2021). In brief, bacterial growth was batch cultivated in a sterile six-well plate (BioLite, United States) at 28 °C in the LB medium.…”

Section: Antibacterial Performance Testingmentioning

confidence: 99%

Graphene Oxide-Hybridized Waterborne Epoxy Coating for Simultaneous Anticorrosive and Antibiofilm Functions

et al. 2022

Self Cite

View full text Add to dashboard Cite

Multifunctional coatings with simultaneous antibacterial and anticorrosive properties are essential for marine environments, oil and gas industry, medical settings, and domestic/public appliances to preserve integrity and functionality of pipes, instruments, and surfaces. In this work, we developed a simple and effective method to prepare graphene oxide (GO)-hybridized waterborne epoxy (GOWE) coating to simultaneously improve anticorrosive and antibacterial properties. The effects of different GO filler ratios (0.05, 0.1, and 0.5, 1 wt%) on the electrochemical and antibacterial behaviors of the waterborne epoxy coating were investigated over short- and long-term periods. The electrochemical behavior was analyzed with salt solution for 64 days. The antibacterial effect of GOWE coating was evaluated with Shewanella oneidensis (MR-1), which is a microorganism that can be involved in corrosion. Our results revealed that concentrations as low as 0.1 wt% of the GO was effective performance than the waterborne epoxy coating without graphene oxide. This result is due to the high hydrophilicity of the graphene oxide fillers, which allowed great dispersion in the waterborne epoxy coating matrix. Furthermore, this study used a corrosion relevant bacterium as a model organism, that is, Shewanella oneidensis (MR-1), which is more relevant for real-word applications. This as-prepared GO-hybridized waterborne polymeric hybrid film provides new insight into the application of 2D nanomaterial polymer composites for simultaneous anticorrosive and antibacterial applications.

show abstract

“…While modifying membrane surfaces with antimicrobials (e.g., metal ions, titanium dioxide − ) and/or antifouling polymers (i.e., zwitterions, poly(ethylene glycol) − ) can effectively concentrate active agents at the surface of the membrane, complicated reaction chemistries or manufacturing, including chemical grafting, plasma treatments, and/or UV treatments, are typically required. This impedes industrial scale up and prevents fouling only on the membrane’s surface rather than within the membrane’s pores. − Thus, an alternative, straightforward approach that transforms all membrane-active sites, including, the surface skin and pores to be fouling resistant without compromising consistent separation performance, is needed.…”

Section: Introductionmentioning

confidence: 99%

Liquid-Infused Membranes Exhibit Stable Flux and Fouling Resistance

Shah

Cihanoğlu

Hardcastle

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Antifouling membranes that offer excellent operational lifetimes are critical technologies needed to meet the growing demand for clean water. In this study, we demonstrate antifouling membranes featuring an ultrathin oil layer that stayed immobilized on the surface and in the pore walls of poly(vinylidene fluoride) membranes for multiple cycles of operation at industrially relevant transmembrane pressures. An optimized quantity of a commercial Krytox oil with either a low (K103) or a high viscosity (K107) was infused onto the active surface and into the pores of membranes with a 0.45 μm pore size. The presence of the oil layer was qualitatively confirmed using crystal violet staining and variable pressure scanning electron microscopy. Using a dead-end stirred cell, a consistent pure water permeance value of 3000 L m–2 h–1 bar–1 was achieved for the K103 liquid-infused membranes for at least 10 operation cycles, which was expectedly lower than the permeance of bare control membranes (∼16 000 L m–2 h–1 bar–1), suggesting that a stable oil layer was formed on all membrane-active sites. To quantify if oil was lost during membrane operation, extensive thermogravimetric analysis was conducted on both the as-prepared and used membranes. When challenged with the microorganism, Escherichia coli K12, the liquid-infused membranes statistically reduced microbial attachment by ∼50% versus the control membranes. For the first time, we have demonstrated that by forming an immobilized, robust, and stable oil-coated membrane, we can generate high-performance membranes with stable permeance values that can be operated at relevant transmembrane pressures and provide long-lasting antifouling properties.

show abstract

Polyacrylic acid-brushes tethered to graphene oxide membrane coating for scaling and biofouling mitigation on reverse osmosis membranes

Cited by 44 publications

References 55 publications

Development of Environment-Friendly Membrane for Oily Industrial Wastewater Filtration

Development of Environment-Friendly Membrane for Oily Industrial Wastewater Filtration

Graphene Oxide-Hybridized Waterborne Epoxy Coating for Simultaneous Anticorrosive and Antibiofilm Functions

Liquid-Infused Membranes Exhibit Stable Flux and Fouling Resistance

Contact Info

Product

Resources

About