Interfacial polymerization of polyamide-aluminosilicate SWNT nanocomposite membranes for reverse osmosis

Baroña, Garry Nathaniel B.; Lim, Joohwan; Choi, Mi‐Jin; Jung, Bumsuk

doi:10.1016/j.desal.2013.06.026

Cited by 171 publications

(87 citation statements)

References 45 publications

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“…The results suggest that the incorporation of small quantities of inorganic nanofillers do not alter the spectra of organic PA structure, indicating the dominant functional groups do not alter. A similar observation was also reported in the work of Barona et al [19] in which aluminosilicate single wall nanotubes were incorporated in the PA layer of composite membrane. In general, the peaks originating from the interfacially polymerized layer could be found at 3445 cm -1 , 1630 cm -1 and 1540 cm -1 .…”

Section: Ftirsupporting

confidence: 72%

A practical approach to synthesize polyamide thin film nanocomposite (TFN) membranes with improved separation properties for water/wastewater treatment

et al. 2016

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Thin film nanocomposite (TFN) membranes containing 0.05 or 0.10 w/v% functionalized titanate nanotubes (TNTs) in polyamide selective layer were prepared via interfacial polymerization of piperazine (PIP) and trimesoyl chloride (TMC) monomers. Nanomaterials were dispersed into the monomer solution using two different approaches. In the first one, the functionalized TNTs were dispersed into the amine aqueous solution, while in the second approach the same nanomaterials were dispersed in TMC organic solution. The TFN membranes were characterized and compared with a control thin film composite (TFC) membrane to investigate the effect of nanofiller loadings and the fabrication approach on membrane properties. Results showed that introducing nanofillers into the organic phase was more effective to synthesize a TFN membrane of greater separation performance as the use of rubber roller to remove aqueous solution from the substrate surface could cause the loss of a significant amount of nanofillers, which further affected the polyamide layer integrity. It was also found that incorporation of high nanofiller loading tended to interfere with interfacial polymerization and weaken the bonds between monomers blocks, resulting in poor polyamide-nanotubes integrity. Compared to the TFC membrane, the TFN membrane made of 2% PIP and 0.15% TMC with 0.5% nanofiller incorporation could achieve greater water flux (7.5 vs 5.4 L/m 2 .h.bar) and Na2SO4 rejection (96.4% vs 86%) while exhibiting higher resistance against the fouling by protein and dye.

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Section: Ftirsupporting

confidence: 72%

A practical approach to synthesize polyamide thin film nanocomposite (TFN) membranes with improved separation properties for water/wastewater treatment

et al. 2016

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“…As the concentration of TiO 2 /HNTs increased, the top surface image exhibited more visible "leaf-like" structures, while formation of TFN membranes with enlarged and uniform PA thickness was evident in the cross-sectional image. These modifications in membrane structures can be attributed to the promotion of interfacial polymerization caused by the introduction of TiO 2 /HNTs [48,51]. As indicated by Lind et al [48], the miscibility of the aqueous and organic phases could be improved by the incorporation of hydrophilic nanoparticles (zeolite) in the organic phase.…”

Section: Characterization Of Composite Membranesmentioning

confidence: 93%

Super hydrophilic TiO2/HNT nanocomposites as a new approach for fabrication of high performance thin film nanocomposite membranes for FO application

et al. 2015

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“…7) by incorporating GO. 56 The more hydrophilic of PPA/GO membranes surface, the more water molecules were attracted and permitted to pass through the membrane. 57 Apart from the key factor, the other reasons could also help to improve the water ux such as the increased membrane free volume due to the mobilization of GO nanosheets in PPA/GO membrane disrupted polymer chain packing, 49 the slightly increased mean effective pore size.…”

Section: Effect Of Go Concentration For Membrane Performancementioning

confidence: 99%

Graphene oxide polypiperazine-amide nanofiltration membrane for improving flux and anti-fouling in water purification

et al. 2016

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In this study, a facile polypiperazine-amide (PPA) composite nanofiltration (NF) membrane with nanomaterial graphene oxide (GO) incorporated into a polyamide (PA) layer for high water flux and anti-fouling was fabricated by interfacial polymerization (IP). The chemical composition, structure and surface properties of the fabricated PPA/GO and PPA composite NF membranes were characterized by FTIR, XPS, FE-SEM, AFM, zeta-potential and contact angle measurements. The separation properties and anti-fouling ability of the PPA/GO NF membrane were investigated and discussed. The experimental results indicated that the water flux of the PPA/GO (300 mgunder the operating pressure of 0.6 MPa, almost 1.4 times that of the PPA (without GO) membrane.However, the high salt rejection was still retained in the order of Na 2 SO 4 (98.2%) > MgSO 4 (96.5%) > NaCl (56.8%) > MgCl 2 (50.5%). An anti-fouling test revealed that the PPA/GO membrane had excellent antifouling properties due to the enhanced hydrophilicity and decreased roughness induced by the GO nanosheets. Thus, the PPA/GO membrane can be efficiently and endurably applied in water purification.

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Interfacial polymerization of polyamide-aluminosilicate SWNT nanocomposite membranes for reverse osmosis

Cited by 171 publications

References 45 publications

A practical approach to synthesize polyamide thin film nanocomposite (TFN) membranes with improved separation properties for water/wastewater treatment

A practical approach to synthesize polyamide thin film nanocomposite (TFN) membranes with improved separation properties for water/wastewater treatment

Super hydrophilic TiO2/HNT nanocomposites as a new approach for fabrication of high performance thin film nanocomposite membranes for FO application

Graphene oxide polypiperazine-amide nanofiltration membrane for improving flux and anti-fouling in water purification

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