Towards enhanced antifouling and flux performances of thin-film composite forward osmosis membrane via constructing a sandwich-like carbon nanotubes-coated support

Deng, Luyao; Wang, Qun; An, Xiaochan; Li, Zhuangzhi; Hu, Yunxia

doi:10.1016/j.desal.2020.114311

Cited by 45 publications

(21 citation statements)

References 55 publications

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“…Surface properties such as surface roughness have a greater effect on this type of fouling than other properties (e.g., surface hydrophilicity), therefore enabling easier removal and cleaning. Differently, under AL-DS mode, the constriction of pores due to the deposited foulants on the active layer that is trapped within the membrane leads to internal fouling, which is very hard to clean up [31,80]. The fouling was dominated over structural properties of the support layer, which is more intense compared to AL-FS mode.…”

Section: Membrane Foulingmentioning

confidence: 97%

“…Deng et al [31] designed a new FO membrane to achieve high flux and high power density when operated in the AL-DS orientation. Sandwich-like SWCNT-coated substrate was prepared by coating PDA-modified SWCNTs on both sides of the PES substrate for high flux and antifouling TFC-FO/PRO membranes.…”

Section: Double-skinned/sandwiched-like Membranementioning

confidence: 99%

“…Forward osmosis (FO), the most common osmotically driven membrane process, stands out as the most promising alternative for RO processes due to its inherently low fouling tendency, easier fouling removal, and energy efficiency when compared to pressure-driven-type membrane processes [16][17][18][19]. Owing to these attractive inherent features, FO has been used as a concentration and dilution process in diverse areas including food processing [21][22][23][24], wastewater treatment [25][26][27], desalination [28][29][30][31], and power generation [3,32]. In medical application, FO assists in controlling the release of drugs with low solubility [33,34] and in preserving properties of feed (nutrition, taste, quality, etc.)…”

Section: Introductionmentioning

confidence: 99%

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Strategies in Forward Osmosis Membrane Substrate Fabrication and Modification: A Review

et al. 2020

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Forward osmosis (FO) has been recognized as the preferred alternative membrane-based separation technology for conventional water treatment technologies due to its high energy efficiency and promising separation performances. FO has been widely explored in the fields of wastewater treatment, desalination, food industry and bio-products, and energy generation. The substrate of the typically used FO thin film composite membranes serves as a support for selective layer formation and can significantly affect the structural and physicochemical properties of the resultant selective layer. This signifies the importance of substrate exploration to fine-tune proper fabrication and modification in obtaining optimized substrate structure with regards to thickness, tortuosity, and porosity on the two sides. The ultimate goal of substrate modification is to obtain a thin and highly selective membrane with enhanced hydrophilicity, antifouling propensity, as well as long duration stability. This review focuses on the various strategies used for FO membrane substrate fabrication and modification. An overview of FO membranes is first presented. The extant strategies applied in FO membrane substrate fabrications and modifications in addition to efforts made to mitigate membrane fouling are extensively reviewed. Lastly, the future perspective regarding the strategies on different FO substrate layers in water treatment are highlighted.

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Section: Membrane Foulingmentioning

confidence: 97%

Section: Double-skinned/sandwiched-like Membranementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Strategies in Forward Osmosis Membrane Substrate Fabrication and Modification: A Review

et al. 2020

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“…Most of the CNTs remain either on/in the top active layer of the TFN membranes; however, they can also work as a thin antibiofouling layer between the support and the PA layer. Deng et al [63] prepared a sandwich-like polyethersulfone (PES)-CNT support through the deposition of polydopamine-modified SWCNTs (PDA-SWCNTs) on PES supports. Subsequently, PA layers on the CNT top layer were formed for the fabrication of high flux and antibiofouling TFN forward osmosis (FO) membranes.…”

Section: Carbon Nanotubesmentioning

confidence: 99%

Antibiofouling Thin‐Film Nanocomposite Membranes for Sustainable Water Purification

Pang

Meier‐Haack

Huang³

et al. 2021

Advanced Sustainable Systems

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Membrane technology provides a reliable and powerful solution to combat the global water crisis by producing fresh water through sustainable desalination. However, the decline in system performance due to membrane biofouling is a limitation and significant efforts have been made to explore fouling control mechanisms and develop simple methods to inhibit or eliminate membrane fouling. Nanotechnology has increased the number of options for the development of antibiofouling membranes by incorporating nanoparticles within the polyamide layer to produce a thin‐film nanocomposite (TFN) structure. This review presents recent advances in the preparation of antifouling TFN membranes and incorporation of different nanoparticles into the design. The review also discusses the strategies and mechanisms for reducing membrane fouling and proposes a future outlook for the field.

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“…These nanomaterials may be either dispersed and immobilized in the membrane support or the selective layer, and form either a mixed matrix membrane (MMM) or a thin film nanocomposite (TFN) membrane, and may serve to modify the morphology and other properties of the membrane [12][13][14]. Some of the nanomaterials in previous membrane development studies include carbon nanotubes [14][15][16], silica [17], titanium dioxide [18], titania nanosheets [19], 80 silver [20], graphene oxide [21][22][23], and metal organic frameworks [24,25]. Recently, a new 81 class of Nano-sized materials known as porous organic polymers (POPs) has gained interest for various applications [26].…”

Section: Introductionmentioning

confidence: 99%

Enhanced water permeability and osmotic power generation with sulfonate-functionalized porous polymer-incorporated thin film nanocomposite membranes

et al. 2020

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In this study, a hydrophobic porous organic polymer (PP) synthesized via Friedel-Crafts alkylation of dichloro-p-xylene, was functionalized with hydrophilic sulfonate functional group to form PP-SO 3 H, prior to incorporation into the polyamide layer of a hollow fiber pressure retarded osmosis (PRO) TFN membrane. Sulfonate functionalization of the PP material improved the compatibility of the nanomaterial with the aqueous amine precursor during the in situ interfacial polymerization, leading to a decrease in aggregation of the nanoparticles. The effect of nanomaterial loading on the membranes' performance was also elucidated. PP-SO 3 H incorporation resulted in significant improvement of surface hydrophilicity, which along with improved porosity, facilitated enhanced water transport across the membrane and maintained an acceptable salt rejection of the selective layer. The best-performing membrane with PP-SO 3 H loading of 0.002 wt. % showed a 46.3 L m -2 h -1 water flux and power density of 14.6 W m -2 , which are both the highest values recorded. This study suggests that the functionality and chemical properties of the nanomaterial in a TFN membrane is essential in improving altogether the osmotic performance and salinity gradient power harvesting capability during PRO.

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Towards enhanced antifouling and flux performances of thin-film composite forward osmosis membrane via constructing a sandwich-like carbon nanotubes-coated support

Cited by 45 publications

References 55 publications

Strategies in Forward Osmosis Membrane Substrate Fabrication and Modification: A Review

Strategies in Forward Osmosis Membrane Substrate Fabrication and Modification: A Review

Antibiofouling Thin‐Film Nanocomposite Membranes for Sustainable Water Purification

Enhanced water permeability and osmotic power generation with sulfonate-functionalized porous polymer-incorporated thin film nanocomposite membranes

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