High-performance polyvinylidene fluoride/poly(styrene–butadiene–styrene)/functionalized MWCNTs-SCN-Ag nanocomposite membranes

Mehwish, Nabila; Kausar, Ayesha; Siddiq, Muhammad

doi:10.1007/s13726-015-0346-z

Cited by 19 publications

(8 citation statements)

References 27 publications

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“…from 83.3%, compared to when no Ag was used. These novel membranes showed potential for further improvement by using a combination of polymer-metal blends for advance water treatment which can be utilized prior to RO operations [226]. Hashaikeh et al [267] reported a fast and efficient in-situ cleaning method for CNT-based membranes through periodic electrolysis.…”

Section: Electrically Conductive Membranesmentioning

confidence: 99%

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

2019

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Recent progress in reverse osmosis (RO) technology is not limited to RO membrane materials, module designs and RO process optimization. It involves prior feed treatment which directly impacts RO system performance. The ongoing challenges of membrane fouling in RO membranes can be addressed by increasing the operational efficiency through the use of correct pretreatment options which can mitigate organic and inorganic fouling by selectively rejecting contaminants prior to reaching the RO unit. Highly polluted water resources have put critical stress on the existing conventional pretreatment techniques, whereby membrane pretreatment has emerged as a promising alternative. This paper provides an overview of the development and current trends in conventional and nonconventional RO pretreatment techniques whereby the techniques are critically reviewed to 2 inform readers of potential improvements in such areas. This paper addresses the major drawbacks of conventional pretreatment methods which have necessitated the use of membrane pretreatment techniques. Special attention is given to microfiltration, ultrafiltration and nanofiltration methods and their development in terms of advanced membrane materials based on ceramics and self-cleaning membranes. Studies from laboratory scale standalone systems, pilot scale and large scale integrated systems for performance, cost and ecological analysis have been reviewed to familiarize readers with the many factors which need to be analyzed for selection of the appropriate pretreatment method(s). The critical review in this paper will help researchers focus more on the areas which have room for further development for cost-effective and advanced RO pretreatment techniques.

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Section: Electrically Conductive Membranesmentioning

confidence: 99%

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

2019

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“…Several techniques have been used to synthesize the MMCNT membranes (Figure 4). The widely employed methods by researchers include phase inversion [75][76][77][78], solution mixing [79,80], polymer grafting [81], in-situ polymerization [82][83][84] and in-situ colloidal precipitation [85], spray-assisted layer-by-layer [86] and interfacial polymerization [87].…”

Section: Types Of Nanotube Membranes and Their Fabricationmentioning

confidence: 99%

“…Solution blending has been used for synthesizing nanocomposite membranes of PVDF/poly(styrene-butadiene-styrene)/thiocyanate and silver-modified MWCNTs [80]. Liu et al [86] used the spray-assisted layer-by-layer technique to prepare the PES/functionalized MWCNT (F-MWCNTs) membrane.…”

Section: Types Of Nanotube Membranes and Their Fabricationmentioning

confidence: 99%

“…The growing, unique surface area is useful for the adsorption of the pollutant. Importantly, CNT's actual surface area is relatively lesser than AC's, hence these CNT merits are more relevant; (2) carbonyl and hydroxyl molecules can be used to functionalize CNT through acid treatment and could be further changed for enhancing the adsorption sensitivity to other different chemicals, resulting in "selective degradation" processes such as pollutant degradation rather than benign species and highly toxic contaminants rather than low toxic contaminants; (3) additionally, the consistent permeable framework of CNTs eliminates the Solution blending has been used for synthesizing nanocomposite membranes of PVDF/ poly(styrene-butadiene-styrene)/thiocyanate and silver-modified MWCNTs [80]. Liu et al [86] used the spray-assisted layer-by-layer technique to prepare the PES/functionalized MWCNT (F-MWCNTs) membrane.…”

Section: Cnts As the Catalystmentioning

confidence: 99%

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Carbon Nanotubes (CNTs): A Potential Nanomaterial for Water Purification

2020

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Nanomaterials such as carbon nanotubes (CNTs) have been used as an excellent material for catalysis, separation, adsorption and disinfection processes. CNTs have grabbed the attention of the scientific community and they have the potential to adsorb most of the organic compounds from water. Unlike, reverse osmosis (RO), nanofiltration (NF) and ultrafiltration (UF) membranes aligned CNT membranes can act as high-flow desalination membranes. CNTs provide a relatively safer electrode solution for biosensors. The article is of the utmost importance for the scientists and technologists working in water purification technologies to eliminate the water crisis in the future. The review article forms the nucleus of all CNT research in the area of water purification.

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“…The dry weight (W dry ) was determined after 48 h drying at 75 °C. The WC ratio was calculated by the following equation [48,49]:…”

Section: Water Contentmentioning

confidence: 99%

Synthesis, characterization, and anti-fouling properties of cellulose acetate/polyethylene glycol-grafted nanodiamond nanocomposite membranes for humic acid removal from contaminated water

et al. 2018

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Polyethylene glycol-grafted nanodiamond (ND-PEG) was synthesized from pristine detonation NDs and utilized to prepare novel cellulose acetate/polyethylene glycol-grafted nanodiamond(CA/ND-PEG)nanocomposite membranes. Due to unique thermal, mechanical, and antibacterial properties and very easy cleaning of fouled ND-embedded CA nanocomposite membranes, we tried to investigate the performance of CA/ND-PEG membrane for humic acid (HA) removal from contaminated water. Surface functionalization was confirmed by Fourier transform infrared spectroscopy and thermogravimetry analysis. Pristine and functionalized ND with different concentration was added in the casting solution containing CA. The prepared membranes were characterized using contact angle, mechanical strength, scanning electron microscopy (SEM), transmission electron microscopy, and permeation tests. SEM micrographs of the surface of the membranes depicted the increase in the number of pores by the addition of ND and especially ND-PEG into polymer matrix. The results indicated that the nanocomposite membrane with 0.5 wt% ND-PEG exhibited excellent hydrophilicity, mechanical properties, permeability, high rejection, high abrasion resistance, and good anti-fouling performance. The HA adsorption on the membrane surface decreased from 2.85 to 2.15 mg cm −2 when the ND-PEG content increased from 0 to 0.5 wt%. Most importantly, the HA filtration experiments revealed that the incorporation of ND and especially ND-PEG particles reduced membrane irreversible fouling, dramatically. Meanwhile, the analysis of the fouling mechanism based on Hermia's model revealed that cake formation is a prevailing mechanism for all membranes.

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High-performance polyvinylidene fluoride/poly(styrene–butadiene–styrene)/functionalized MWCNTs-SCN-Ag nanocomposite membranes

Cited by 19 publications

References 27 publications

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

Carbon Nanotubes (CNTs): A Potential Nanomaterial for Water Purification

Synthesis, characterization, and anti-fouling properties of cellulose acetate/polyethylene glycol-grafted nanodiamond nanocomposite membranes for humic acid removal from contaminated water

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