Thin film nanocomposite forward osmosis membranes based on layered double hydroxide nanoparticles blended substrates

Lu, Peng; Liang, Shuai; Qiu, Lei; Gao, Yanshan; Wang, Qiang

doi:10.1016/j.memsci.2015.12.066

Cited by 129 publications

(40 citation statements)

References 53 publications

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“…2 a) and b), LDH nanofillers displayed a layer structure materials as indicated in square red line. This characteristics properties were found as similar as shown by research reported from Dong and co-workers [11]. Besides that, the SEM images of LDH nanofillers shows that the CuAl LDH particles cluster all together as shown in red circle in figure 2 c) into a large aggregates mainly caused by high surface charge and surface tension [11,13].…”

Section: Ldh Morphological Structuressupporting

confidence: 87%

“…with significant increment by 82.4 %. As the values of contact angle measurement was decreased the hydrophilicity of membrane improved due to existence of layered structure of LDH nanofillers [11][12].…”

Section: Membrane Separation Performancesmentioning

confidence: 99%

“…1 such as layered double hydroxides has gained significant attention especially in membrane fabrication for desalination process [10][11]. With their ability to intercalated in interlayer regions and tunable ratio composition they were found prominently in many applications such as photocatalyst, adsorbents and medicines.…”

Section: Introductionmentioning

confidence: 99%

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Incorporation of layered double nanomaterials in thin film nanocomposite nanofiltration membrane for magnesium sulphate removal

et al. 2018

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Abstract. Thin film nanocomposite (TFN) membrane with copperaluminium layered double hydroxides (LDH) incorporated into polyamide (PA) selective layer has been prepared for magnesium sulphate salt removal. 0, 0.05, 0.1, 0.15, 0.2 wt% of LDH were dispersed in the trimesoyl chloride (TMC) in n-hexane as organic solution and embedded into PA layer during interfacial polymerization with piperazine. The fabricated membranes were further characterized to evaluate its morphological structure and membrane surface hydrophilicity. The TFN membranes performance were evaluated with divalent salt magnesium sulphate (MgSO4) removal and compared with thin film composite (TFC). The morphological structures of TFN membranes were altered and the surface hydrophilicity were enhanced with addition of LDH. Incorporation of LDH has improved the permeate water flux by 82.5% compared to that of TFC membrane with satisfactory rejection of MgSO4. This study has experimentally validated the potential of LDH to improve the divalent salt separation performance for TFN membranes.

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Section: Ldh Morphological Structuressupporting

confidence: 87%

Section: Membrane Separation Performancesmentioning

confidence: 99%

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Incorporation of layered double nanomaterials in thin film nanocomposite nanofiltration membrane for magnesium sulphate removal

et al. 2018

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“…Owing to their flexible, tunable chemical composition and high anion exchange capacity, LDHs possess a huge advantage being used as adsorbents, catalysis, and inorganic fillers [35][36][37] . In our previous work 24 , LDH nanoparticles were blended in the PSf substrate of a TFN membrane to increase porosity, hydrophilicity, mechanical strengths, and thermal stability. The TFN membrane with the nanoparticle dosage of 2 wt% exhibited the highest water flux (~42.5% higher than that of the pristine TFC membrane) with minor compromise of reverse salt flux.…”

Section: Introductionmentioning

confidence: 99%

Layered double hydroxide/graphene oxide hybrid incorporated polysulfone substrate for thin-film nanocomposite forward osmosis membranes

Liang

Zhou

et al. 2016

RSC Adv.

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Layered double hydroxide/graphene oxide (LDH/GO) hybrid as nanofillers for polysulfone (PSf) substrate for the fabrication of thin film nanocomposite (TFN) forward osmosis (FO) membrane was reported. The influence of the incorporation of LDH/GO hybrid on the physicochemical properties of the PSf substrate and systematically investigated the resultant TFN membrane performance. The results demonstrated that adding LDH/GO hybrid enhanced the PSf substrate with increased porosity, hydrophilicity, surface pore diameter, and mechanical strengths.Consequently, all the TFN membranes obtained increased water permeability and salt rejection as compared to the thin film composite (TFC) membrane prepared on a conventional PSf substrate. Using 1 M NaCl as the draw solution and DI water as feed solution, the water flux of the TFN membrane with a 2 wt% LDH/GO dosage as high as 23.6 L m -2 h -1 under the pressure retarded osmosis (PRO) mode. Moreover, compared to conventional TFC membrane, the TFN membrane with a 2 wt% LDH/GO also showed a very low reverse salt flux (6.2 g m -2 h -1 ). The improvement in FO performance was attributed to the lower structure parameter of modified PSf substrate and the reduction of internal concentration polarization. This study suggests LDH/GO hybrid is an effective additive for modifying PSf substrate for the development of FO membranes. nanomaterials (e.g. zeolite and layered double hydroxides (LDHs)) 21-24 have been used in the fabrication of TFC FO membranes. For a FO membrane desalination process, these inorganic nanomaterials also help to enhance the permeability, mechanical and thermal stability of polymeric membranes. Emadzadeh et al. 14 synthesized thin-film nanocomposite (TFN) membranes based on TiO 2 -PSf support layers for FO desalination. The results revealed that both the hydrophilicity and porosity of the substrate were increased by the addition of TiO 2 nanoparticles.Similarly, SiO 2 nanoparticles have also been demonstrated to be a good modifying agent to enhance water permeability, increase the overall porosity, and reduce ICP of the PSf substrate 1 . It is believed that the metal oxide nanoparticles could provide more water channels and/or high porosity.Carbon-based nanomaterials stand for another type of promising materials that can heighten the performance of polymeric membranes in desalination application, with an upward trend in research over recent years 13 . For instance, graphene oxide (GO) which contains abundant oxygen functional groups (carboxyl, epoxy and hydroxyl groups) and one atomic thickness has been reported to offer high chemical stability, strong hydrophilicity, and excellent antifouling properties 20, 25-27 . A single-layer graphene membrane exhibited quick water transportation ability and a nearly 100% salt-rejection rate theoretically 28, 29 . Qin et al. 30 incorporated GO in the support layer of a TFC membrane which obtained higher salt removals (>99.7% for multivalent ions). Park et al. 20 fabricated a PSf/GO composite membrane support layer, which res...

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“…The figure does represent only those membranes tested with sodium chloride as the draw agent and DI water as the feed solution. These data are tabulated in the supplementary material (Table S1 [ [17][18][19]51,52,[58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77]) where references are provided. In general, membranes exhibiting higher water permeance often show lower water/NaCl permeability selectivity and vice versa [50].…”

Section: Resultsmentioning

confidence: 99%

Nanoparticle-embedded nanofibers in highly permselective thin-film nanocomposite membranes for forward osmosis

Bui

McCutcheon

2016

Journal of Membrane Science

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Here we report a scalable approach to fabricate osmotic membranes with high permselectivity based on nanocomposite of mesoporous silica nanoparticles and nanofibers by electrospinning. Transmission electron microscopy (TEM) images provide visualization of dispersed and clustered nanoparticles embedding within or at the surface of nanofibers. Energy-dispersive Xray (EDX) point analysis confirmed the chemical identity of the nanocomposite structure. Brunauer-Emmett-Teller (BET) analyses show a 75-fold increase in specific surface area when 15% of silica nanoparticles were integrated into polyacrylonitrile nanofibrous mats. Mechanical strength tests show that even at high load of silica nanoparticles, e.g. 15 wt%, the mechanical integrity of the membranes was maintained. Incorporating nanoparticles into nanofibrous mats enhanced their water uptake up to two times. In osmotic transport studies, we observed an outstanding permselectivity of our membranes compared to ones reported in literature. Our membranes show a remarkable 7-fold and 3.5-fold enhancements in osmotic water permeability and water/sodium chloride selectivity, respectively, compared to standard commercial forward osmosis membranes. These results suggest a path to develop scalable, high performance osmotic membranes and to further study the predominant mechanism governing transport behaviors of water and solute across nanomaterials interfaces.

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Thin film nanocomposite forward osmosis membranes based on layered double hydroxide nanoparticles blended substrates

Cited by 129 publications

References 53 publications

Incorporation of layered double nanomaterials in thin film nanocomposite nanofiltration membrane for magnesium sulphate removal

Incorporation of layered double nanomaterials in thin film nanocomposite nanofiltration membrane for magnesium sulphate removal

Layered double hydroxide/graphene oxide hybrid incorporated polysulfone substrate for thin-film nanocomposite forward osmosis membranes

Nanoparticle-embedded nanofibers in highly permselective thin-film nanocomposite membranes for forward osmosis

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