Study on the fabrication, characterization and performance of PVDF/calcium stearate composite nanofiltration membranes

Ekambaram, Kavitha; Doraisamy, Mohan

doi:10.1016/j.desal.2016.01.029

Cited by 19 publications

(8 citation statements)

References 48 publications

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“…Membrane separation properties of TFC 0 , TFC n , and two commercial NF membranes (NF270 and NF90). (a) Pure water permeability and NaCl/MgSO 4 selectivity, (b) rejection of NaCl, MgCl 2 , Na 2 SO 4 , and MgSO 4 (tested at 50 psi using a 1000 ppm salt solution containing a single type of salt), (c) trade-off between pure water permeability and NaCl/MgSO 4 selectivity (based on the literature survey of NF membranes prepared in the laboratory and some commercially available NF membranes, ,− with the square symbols representing recently published NF membranes that are prepared on nanostructured interfaces), ,, and (d) the required pressure to obtain a target flux of 20 L m –2 h –1 for pretreating a synthetic seawater …”

Section: Resultsmentioning

confidence: 99%

Tannic Acid/Fe³⁺ Nanoscaffold for Interfacial Polymerization: Toward Enhanced Nanofiltration Performance

Yang

Zhou

Guo

et al. 2018

Environ. Sci. Technol.

334

236

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Conventional thin-film composite (TFC) membranes suffer from the trade-off relationship between permeability and selectivity, known as the "upper bound". In this work, we report a high performance thin-film composite membrane prepared on a tannic acid (TA)-Fe nanoscaffold (TFC) to overcome such upper bound. Specifically, a TA-Fe nanoscaffold was first coated onto a polysulfone substrate, followed by performing an interfacial polymerization reaction between trimesoyl chloride (TMC) and piperazine (PIP). The TA-Fe nanoscaffold enhanced the uptake of amine monomers and provided a platform for their controlled release. The smaller surface pore size of the TA-Fe coated substrate further eliminated the intrusion of polyamide into the substrate pores. The resulting membrane TFC showed a water permeability of 19.6 ± 0.5 L m h bar, which was an order of magnitude higher than that of control TFC membrane (2.2 ± 0.3 L m h bar). The formation of a more order polyamide rejection layer also significantly enhanced salt rejection (e.g., NaCl, MgCl, NaSO, and MgSO) and divalent to monovalent ion selectivity (e.g., NaCl/MgSO). Compared to conventional TFC nanofiltration membranes, the novel TFC membrane successfully overcame the longstanding permeability and selectivity trade-off. The current work paves a new avenue for fabricating high performance TFC membranes.

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Section: Resultsmentioning

confidence: 99%

Tannic Acid/Fe³⁺ Nanoscaffold for Interfacial Polymerization: Toward Enhanced Nanofiltration Performance

Yang

Zhou

Guo

et al. 2018

Environ. Sci. Technol.

334

236

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“…Moreover, according to the relationship between MWCO and Stokes− Einstein radii, the mean pore radius of the corresponding membrane can be obtained from the equation 32,33 = −…”

Section: Acs Applied Materials and Interfacesmentioning

confidence: 99%

Oriented Clay Nanotube Membrane Assembled on Microporous Polymeric Substrates

Qin

Zhao

Liu

et al. 2016

ACS Appl. Mater. Interfaces

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Organized arrays of halloysite clay nanotubes have great potential in molecular separation, absorption, and biomedical applications. A highly oriented layer of halloysite on polyacrylonitrile porous membrane was prepared via a facile evaporation-induced method. Scanning electronic microscopy, surface attenuated total reflection Fourier transform infrared spectroscopy, and energy dispersive X-ray spectroscopy mapping indicated formation of the nanoarchitecture-controlled membrane. The well-ordered nanotube coating allowed for the excellent dye rejection (97.7% for reactive black 5) with high salt permeation (86.5% for aqueous NaCl), and thus these membranes were suitable for dye purification or concentration. These well-aligned nanotubes' composite membranes also showed very good fouling resistance against dye accumulation and bovine serum albumin adsorption as compared to the pristine polyacrylonitrile or membrane coated with disordered halloysite layer.

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“…where 3 is the substrate porosity of the membrane, w 1 À w 2 is the ethanol content, A m (m 2 ) is the effective membrane area of the sample, r is the ethanol density (g cm À3 ), and l is the thickness of membrane (mm). 37…”

Section: Membrane Characterizationmentioning

confidence: 99%

Comparison of performance and biofouling resistance of thin-film composite forward osmosis membranes with substrate/active layer modified by graphene oxide

et al. 2019

RSC Adv.

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Study on the fabrication, characterization and performance of PVDF/calcium stearate composite nanofiltration membranes

Cited by 19 publications

References 48 publications

Tannic Acid/Fe³⁺ Nanoscaffold for Interfacial Polymerization: Toward Enhanced Nanofiltration Performance

Tannic Acid/Fe³⁺ Nanoscaffold for Interfacial Polymerization: Toward Enhanced Nanofiltration Performance

Oriented Clay Nanotube Membrane Assembled on Microporous Polymeric Substrates

Comparison of performance and biofouling resistance of thin-film composite forward osmosis membranes with substrate/active layer modified by graphene oxide

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Study on the fabrication, characterization and performance of PVDF/calcium stearate composite nanofiltration membranes

Cited by 19 publications

References 48 publications

Tannic Acid/Fe3+ Nanoscaffold for Interfacial Polymerization: Toward Enhanced Nanofiltration Performance

Tannic Acid/Fe3+ Nanoscaffold for Interfacial Polymerization: Toward Enhanced Nanofiltration Performance

Oriented Clay Nanotube Membrane Assembled on Microporous Polymeric Substrates

Comparison of performance and biofouling resistance of thin-film composite forward osmosis membranes with substrate/active layer modified by graphene oxide

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Tannic Acid/Fe³⁺ Nanoscaffold for Interfacial Polymerization: Toward Enhanced Nanofiltration Performance

Tannic Acid/Fe³⁺ Nanoscaffold for Interfacial Polymerization: Toward Enhanced Nanofiltration Performance