Low operating pressure nanofiltration membrane with functionalized natural nanoclay as antifouling and flux promoting agent

Maalige, R Nidhi; Aruchamy, Kanakaraj; Mahto, Ashesh; Sharma, Vibha T.; Deepika, D.; Nataraj, Sanna Kotrappanavar

doi:10.1016/j.cej.2018.10.087

Cited by 48 publications

(17 citation statements)

References 27 publications

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“…By embedding the hydrophobic ZIF-67 in the SPSf matrix, the blended membranes have a larger contact angle, rougher surface, and larger surface pore size. Due to the hydrophobic interactions with BSA and the ridge-valley morphology of the blended membrane's surface, BSA was prone to accumulation and deposition on the surface to form a filter cake layer (Alizadeh Tabatabai et al 2014;Nidhi Maalige et al 2019;Zhang et al 2019b). On the other hand, the larger pore size of the blend membranes allowed BSA to more easily enter and block the pores of the membrane to cause irreversible fouling (Polyakov & Zydney 2013;Zhu et al 2020), reducing the water flux, which decreased the FRR.…”

Section: Membrane Antifouling Performancementioning

confidence: 99%

Application of ZIF-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties

Yin¹,

Tang²,

Liu³

et al. 2021

Water Science and Technology

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High-performance sulfonated polysulfone (SPSf) mixed-matrix membranes (MMMs) were fabricated via a nonsolvent-induced phase separation (NIPS) method using ZIF-67 (Zeolitic imidazolate frameworks-67) as a crosslinker. Acid-base crosslinking occurred between the sulfonic acid groups of SPSf and the tertiary amine groups of the embedded ZIF-67, which improved the dispersion of ZIF-67 and simultaneously improved the membrane structure and permselectivity. The dispersion of ZIF-67 in the MMMs and the acid-base crosslinking reaction were verified by energy-dispersive X-ray spectroscopy (EDX), X-ray diffractometry (XRD), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The pore structure analysis of MMMs indicated that filling ZIF-67 into SPSf enhanced the average surface pore sizes, surface porosities and more micropore in cross-sections. The crossflow filtrations showed the MMMs have higher pure water fluxes (57 to 111 L m−2 h−1) than the SPSf membrane (55 L m−2 h−1) but also higher BSA(bovine serum albumin) rejection rate of 93.9–95.8%, a model protein foulant. The MMMs showed a higher water contact angle than the SPSf membrane due to the addition of hydrophobic ZIF-67 and acid-base crosslinking, and also maintained high thermal stability evidenced by the TGA(Thermogravimetric analysis) results. At the optimal ZIF-67 concentration of 0.3 wt%, the water flux of the SPSf-Z67-0.3 membrane was 82 L m−2 h−1 with a high BSA rejection rate of 95.3% at 0.1 MPa and better antifouling performance (FRR = 70%).

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Section: Membrane Antifouling Performancementioning

confidence: 99%

Application of ZIF-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties

Yin¹,

Tang²,

Liu³

et al. 2021

Water Science and Technology

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“…With the rapid advancement of nanotechnology, researchers focus on developing nanoparticles to improve the TFC membranes. These nanoparticles are silica [29,31], silver [30,32], graphene or graphene oxide [33,34], zeolites [35,36], nanoclays [37][38][39][40][41][42][43], quantum dots [44,45], and carbon nanotubes [46,47]. TFC membranes with embedded nanoparticles are called thin-film nanocomposite (TFN) membranes [48,49].…”

Section: Introductionmentioning

confidence: 99%

“…MMTs also have ions that may undergo ionic substitution, capable of producing useful new materials for various applications [53]. For the membrane applications, several scholars [37][38][39][40][41][42][43] attempted to embed different types of nanoclay in a polyamide matrix. Recently, Li et al [37], modified a synthetic nanoclay-laponite by functionalizing it with different metal ions.…”

Section: Introductionmentioning

confidence: 99%

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Assessing the Performance of Thin-Film Nanofiltration Membranes with Embedded Montmorillonites

et al. 2020

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In this study, the basal spacing of montmorillonite (MMT) was modified through ion exchange. Two kinds of MMT were used: sodium-modified MMT (Na-MMT) and organo-modified MMT (O-MMT). These two particles were incorporated separately into the thin-film nanocomposite polyamide membrane through the interfacial polymerization of piperazine and trimesoyl chloride in n-hexane. The membrane with O-MMT (TFNO-MMT) has a more hydrophilic surface compared to that of membrane with Na-MMT (TFNNa-MMT). When various types of MMT were dispersed in the n-hexane solution with trimesoyl chloride (TMC), O-MMT was well-dispersed than Na-MMT. The poor dispersion of Na-MMT in n-hexane led to the aggregation of Na-MMT on the surface of TFNNa-MMT. TFNO-MMT displayed a uniform distribution of O-MMT on the surface, because O-MMT was well-dispersed in n-hexane. In comparison with the pristine and TFNNa-MMT membranes, TFNO-MMT delivered the highest pure water flux of 53.15 ± 3.30 L∙m−2∙h−1 at 6 bar, while its salt rejection for divalent ions remained at 95%–99%. Furthermore, it had stable performance in wide operating condition, and it exhibited a magnificent antifouling property. Therefore, a suitable type of MMT could lead to high separation efficiency.

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“…Scientists have used nanomaterials such as carbon nanotube (CNT) [15], graphene [16], titanium dioxide [17], and silver nanoparticles [18], among others, for fabricating the TFNC membrane. Despite that, naturally occurring nanomaterials such as clay powders are interesting, as well as sustainable sources drawing huge attention among the research community because of their green as well as universal features [19].…”

Section: Introductionmentioning

confidence: 99%

Organically Modified Nanoclay Filled Thin-Film Nanocomposite Membranes for Reverse Osmosis Application

et al. 2019

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This study validates, for the first time, the effectiveness of two nanoclays, that is, cloisite (CS)-15A and montmorillonite (MNT) at the polyamide (PA) active layer in the reverse osmosis (RO) membrane. Cloisite-15A is natural montmorillonite modified with dimethyl dihydrogenated tallow quaternary ammonium salt. Thin-film composite (TFC) membranes were fabricated by the interfacial polymerization (IP) process between the trimesoylchloride (TMC)–n-hexane solution and m-phenylenediamine (MPD)–aqueous solution; the IP process took place on a polysulfone support sheet. The two types of nanoparticles were added in various weight ratios (0.005 wt.%–0.04 wt.%) in the n-hexane solution of TMC. Different characterizations like X-ray diffraction (XRD), contact angle, transmission electron microscopy (TEM), and membrane performance tests were performed to analyse the membrane properties. Both XRD and TEM studies proved that the two nanoclays are successfully anchored at the different sites of the PA layer. CS-15A could accelerate the water flux from 15 to 18.65 L/m2·h with NaCl rejection enhancement from 72% to 80%, relative to the control membrane. Conversely, MNT also enhanced the flux from 15 to 40 L/m2·h, but NaCl rejection reduced from 70% to 23%. The mechanism of water uptake in nanoclays was also discussed. The results pave the way for a complete future study, in which these phenomena should be studied in great detail.

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Low operating pressure nanofiltration membrane with functionalized natural nanoclay as antifouling and flux promoting agent

Cited by 48 publications

References 27 publications

Application of ZIF-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties

Application of ZIF-67 as a crosslinker to prepare sulfonated polysulfone mixed-matrix membranes for enhanced water permeability and separation properties

Assessing the Performance of Thin-Film Nanofiltration Membranes with Embedded Montmorillonites

Organically Modified Nanoclay Filled Thin-Film Nanocomposite Membranes for Reverse Osmosis Application

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