Modification of thin film composite polyamide membranes with 3D hyperbranched polyglycerol for simultaneous improvement in their filtration performance and antifouling properties

Liu, Zhongyun; An, Xiaochan; Dong, Chunhong; Zheng, Sunxiang; Mi, Baoxia; Hu, Yunxia

doi:10.1039/c7ta07335f

Cited by 90 publications

(34 citation statements)

References 51 publications

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“…The broad peak present in the range of 3600 cm −1 to 3200 cm −1 was attribu to the presence of amide linkage (-CO-NH) overlapped by -COOH functions presen the membranes, while the peaks located at 2900 cm −1 and 2800 cm −1 were due to aliph -CH2 and -CH bonds. Moreover, the presence of carbonyl function (>C=O) was confirm at 1650 cm −1 [16,17]. Similarly, the fingerprint regions of all of the membranes resem each other, which further hints that the deposited layers were quite thin since the cha teristic peaks of the M-0 membrane were significantly visible even after the LBL mo cation.…”

Section: The Surface Functionalitiesmentioning

confidence: 64%

“…In a recent study, Hu et al synthesized a new antifouling TFC-NF membrane by incorporating hyperbranched polyglycerol (hPG) using the layer-by-layer interfacial polymerization. The hPG decorated membrane showed increased hydrophilicity with the contact angle reaching to 16.4 • and inhibiting the membrane fouling by bovine serum albumin (BSA) [16]. In another work carried out by Mohtada et al, a combination of polyelectrolytes including poly(diallyldimethylammonium chloride) and poly(acrylic acid) (PAA) was used to modify a polyamide-imide ultrafiltration membrane.…”

Section: Introductionmentioning

confidence: 99%

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Facile Modification of NF Membrane by Multi-Layer Deposition of Polyelectrolytes for Enhanced Fouling Resistance

et al. 2021

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Fouling not only deteriorates the membrane structure but also compromises the quality of the permeate and has deleterious consequences on the membrane operation. In the current study, a commercial thin film composite nanofiltration membrane (NF90) was modified by sequentially depositing oppositely charged polycation (poly(allylamine hydrochloride)) and polyanion (poly(acrylic acid)) polyelectrolytes using the layer-by-layer assembly method. The water contact angle was decreased by ~10° after the coating process, indicating increased hydrophilicity. The surface roughness of the prepared membranes decreased from 380 nm (M-0) to 306 nm (M-10) and 366 nm (M-20). M-10 membrane showed the highest permeate flux of 120 L m−2 h−1 with a salt rejection of >98% for MgSO4 and NaCl. The fabricated membranes M-20 and M-30 showed 15% improvement in fouling resistance and maintained the initial permeate flux longer than the pristine membrane.

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Section: The Surface Functionalitiesmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Facile Modification of NF Membrane by Multi-Layer Deposition of Polyelectrolytes for Enhanced Fouling Resistance

et al. 2021

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“…The functionalized membrane reportedly possessed better antifouling (alginate) property. Similar functionalization has also been adopted by grafting superhydrophilic 3D hyperbranched polyglycerol, PEI, and polyamidoamine (PAMAM) dendrimers to the TFC surface to enhance the antifouling properties by having better rejection of foulants such as BSA, alginate, and ammonia [113][114][115]. These highly branched molecules offers a high density of hydrophilic functional groups on the membrane surface that could minimize the adsorption of protein and bacteria [116].…”

Section: Graftingmentioning

confidence: 99%

Polymeric Reverse Osmosis and Forward Osmosis Membranes for Water Desalination

Ang

2021

Materials Research Foundations

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Polymeric reverse osmosis (RO) and forward osmosis (FO) membranes have been predominantly used in membrane applications for water desalination. The membrane science has advanced in the past decades and various efforts have been employed to improve the membrane characteristics for enhanced water flux and impurities rejection capability. In this chapter, the progress of RO and FO membranes has been discussed in three sections: synthesis methods of RO and FO membranes, modification works done on the membranes and the formulation used for the synthesis of RO and FO membranes, with particular interest given to the incorporation of nanoparticles in the synthesis of thin film composite membrane.

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“…A PSf ultrafiltration membrane was used as the support layer to prepare the TFC membrane. It was home-made using a previously reported method of non-solvent-induced phase separation [37]. A total of 12 g of PSf was first dried in a vacuum oven overnight at 90 • C and then dissolved in 88 g of NMP to form a homogenous casting solution.…”

Section: Preparation Of Psf Porous Supportsmentioning

confidence: 99%

Tuning the Surface Structure of Polyamide Membranes Using Porous Carbon Nitride Nanoparticles for High-Performance Seawater Desalination

Zhou

Shinde

et al. 2020

Membranes

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Enhancing the water flux while maintaining the high salt rejection of existing reverse osmosis membranes remains a considerable challenge. Herein, we report the use of a porous carbon nitride (C3N4) nanoparticle to potentially improve both the water flux and salt rejection of the state-of-the-art polyamide (PA) thin film composite (TFC) membranes. The organic–organic covalent bonds endowed C3N4 with great compatibility with the PA layer, which positively influenced the customization of interfacial polymerization (IP). Benefitting from the positive effects of C3N4, a more hydrophilic, more crumpled thin film nanocomposite (TFN) membrane with a larger surface area, and an increased cross-linking degree of PA layer was achieved. Moreover, the uniform porous structure of the C3N4 embedded in the ”ridge” sections of the PA layer potentially provided additional water channels. All these factors combined provided unprecedented performance for seawater desalination among all the PA-TFC membranes reported thus far. The water permeance of the optimized TFN membrane is 2.1-folds higher than that of the pristine PA-TFC membrane, while the NaCl rejection increased to 99.5% from 98.0%. Our method provided a promising way to improve the performance of the state-of-art PA-TFC membranes in seawater desalination.

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Modification of thin film composite polyamide membranes with 3D hyperbranched polyglycerol for simultaneous improvement in their filtration performance and antifouling properties

Abstract: 3D hyperbranched polyglycerol-modified thin film composite polyamide membranes for simultaneous improvement in their filtration performance and antifouling properties.

Cited by 90 publications

References 51 publications

Facile Modification of NF Membrane by Multi-Layer Deposition of Polyelectrolytes for Enhanced Fouling Resistance

Facile Modification of NF Membrane by Multi-Layer Deposition of Polyelectrolytes for Enhanced Fouling Resistance

Polymeric Reverse Osmosis and Forward Osmosis Membranes for Water Desalination

Tuning the Surface Structure of Polyamide Membranes Using Porous Carbon Nitride Nanoparticles for High-Performance Seawater Desalination

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