Preparation and properties of functionalized carbon nanotube/PSF blend ultrafiltration membranes

Qiu, Shi; Wu, Li–guang; Pan, Xuejie; Zhang, Lin; Chen, Huan-Lin; Gao, Congjie

doi:10.1016/j.memsci.2009.06.041

Cited by 328 publications

(125 citation statements)

References 25 publications

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“…The incorporation of carbon nanotube in membranes has been known to have high liquid or gas permeability and mechanical and chemical stability (Shi et al 2013). Improved separation performances were achieved by employing those CNTs as inclusions to polymers (Qiu et al 2009;Kim and Van der Bruggen 2010;Sahoo et al 2010). CNTs are tubular in shape and offer the fast transport way to pass water molecules.…”

Section: Introductionmentioning

confidence: 99%

Modification of thin-film polyamide membrane with multi-walled carbon nanotubes by interfacial polymerization

et al. 2017

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Polyamide thin-film composite (TFC) was fabricated on polysulfone (PS-20) base by interfacial polymerization of aqueous m-phenylenediamine (MPD) solution and 1,3,5-benzenetricarbonyl trichloride (TMC) in hexane organic solution. Multi-wall carbon nanotubes (MWCNT) were carboxylated by heating MWCNT powder in a mixture of HNO 3 and H 2 SO 4 (1:3 v/v) at 70°C under constant sonication for different periods. Polyamide nanocomposites were prepared by incorporating MWCNT and the carboxylated MWCNT (MWCNT-COOH) at different concentrations (0.001-0.009 wt%). The developed composites were analyzed by Fourier transform infrared spectroscopy-attenuated total reflection, scanning electron microscopy, transmission electron microscopy, contact angle measurement, determination of salt rejection and water permeate flux capabilities. The surface morphological studies displayed that the amalgamation of MWCNT considerably changed the surface properties of modified membranes. The surface hydrophilicity was increased as observed in the enhancement in water flux and pure water permeance, due to the presence of hydrophilic nanotubes. Salt rejection was obtained between 94 and 99% and varied water flux values for TFC-reference membrane, pristine-MWCNT in MPD, pristine-MWCNT in TMC and MWCNT-COOH in MPD were 20.5, 38, 40 and 43 L/m 2 h. The water flux and salt rejection performances revealed that the MWCNT-COOH membrane was superior membrane as compared to the other prepared membranes.

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Section: Introductionmentioning

confidence: 99%

Modification of thin-film polyamide membrane with multi-walled carbon nanotubes by interfacial polymerization

et al. 2017

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“…The results reveal that the pristine PMIA membrane has a higher roughness than PMIA/GO composite membranes, with R a = 4.367 nm, R q = 5.252 nm and R z = 35.371 nm. The surface of membrane became smooth because of low electrostatic interactions of modified carbon based nanofiller with low contents, they are regularly collocated in membrane [52]. On the other hand, the roughness of PMIA/GO composite membranes is enhanced as the GO content increases to 0.5 wt%.…”

Section: Morphologies Of the Go Embedded Pmia Membranesmentioning

confidence: 99%

Preparation of graphene oxide modified poly(m-phenylene isophthalamide) nanofiltration membrane with improved water flux and antifouling property

Yang

Zhao

Zhang

et al. 2017

Applied Surface Science

118

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a b s t r a c tPoly (m-phenylene isophthalamide)/graphene oxide (PMIA/GO) composite nanofiltartion (NF) membranes were prepared via a facile phase inversion method. Structures, surface properties and hydrophilicities of the membrane were analyzed using FT-IR, XPS, AFM, SEM, water contact angle and Zeta-potential measurements. FTIR spectra indicated the existence of hydrophilic carboxylic acid and hydroxyl groups in the GO molecules. SEM pictures revealed the large and finger-like micro-voids formed in the sublayer of the NF membranes after adding GO. The zeta-potential and water contact angle results proved that PMIA/GO composite membranes had more negatively charged and greater hydrophilic surfaces. The pure water flux of the PMIA/GO (0.3 wt% GO) composite membrane (125.2 (L/m 2 /h)) was 2.6 times as high as that of the pristine PMIA NF membrane (48.3 (L/m 2 /h)) at 0.8 MPa with slightly higher rejections to all tested dyes and better fouling resistance to bovine serum albumin (BSA). This study gave an effective method for preparing composite PMIA NF membranes with high water flux and excellent antifouling property, which showed potential application in water treatment.

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“…These data give indirect evidence that the clusters are destructed at high velocity gradients. The inclusion of fullerenes, other carbon and metal oxide nanoparticles in different polymers modifies the properties of films and membranes based on these polymers [3,9,[19][20][21][22][23][24][25][26][27][28][29][30]. For example, the addition of small amounts of fullerene (up to 2-10 wt%) to poly (phenylene oxide) (PPO), PS, and PA changes selectivity and permeability of membranes made from these polymers in gas separation and pervaporation processes [3,[28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Properties of casting solutions and ultrafiltration membranes based on fullerene-polyamide nanocomposites

Sudareva¹,

Penkova²,

Kostereva³

et al. 2012

Express Polym. Lett.

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Abstract. Poly(phenylene isophtalamide) (PA) was modified by fullerene C 60 using solid-phase method. Novel ultrafiltration membranes based on nanocomposites containing up to 10 wt% of fullerene and carbon black were prepared. Properties of PA/C 60 composites in solutions were studied by light scattering and rheological methods. The relationship between characteristics of casting solutions and properties of nanocomposite membranes was studied. Scanning electron microscopy was used for structural characterization of the membranes. It was found that increase in fullerene content in nanocomposite enhances the membrane rigidity. All nanocomposite membranes were tested in dynamic (ultrafiltration) and static sorption experiments using a solution of protein mixture, with the purpose of studying protein sorption. The membranes modified by fullerene demonstrate the best values of flux reduced recovery after contact with protein solution. It was found that addition of fullerene C 60 to the polymer improves technological parameters of the obtained composite membranes.

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Preparation and properties of functionalized carbon nanotube/PSF blend ultrafiltration membranes

Cited by 328 publications

References 25 publications

Modification of thin-film polyamide membrane with multi-walled carbon nanotubes by interfacial polymerization

Modification of thin-film polyamide membrane with multi-walled carbon nanotubes by interfacial polymerization

Preparation of graphene oxide modified poly(m-phenylene isophthalamide) nanofiltration membrane with improved water flux and antifouling property

Properties of casting solutions and ultrafiltration membranes based on fullerene-polyamide nanocomposites

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