High-performance reverse osmosis nanocomposite membranes containing the mixture of carbon nanotubes and graphene oxides

Nanocomposite membrane containing CNTs and GO exhibits considerably improved performances by the synergistic combinations of CNTs and GO, which can increase the dispersity in a polymeric matrix.

Download Full-text

High Performance and Chlorine Resistant Carbon Nanotube/Aromatic Polyamide Reverse Osmosis Nanocomposite Membrane

MRS Advances ◽

10.1557/adv.2016.232 ◽

2016 ◽

Vol 1 (20) ◽

pp. 1469-1476 ◽

Cited By ~ 8

Author(s):

Rodolfo Cruz-Silva ◽

Shigeki Inukai ◽

Takumi Araki ◽

Aaron Morelos-Gomez ◽

Josue Ortiz-Medina ◽

...

Keyword(s):

Carbon Nanotubes ◽

Reverse Osmosis ◽

High Performance ◽

Mechanical Stability ◽

Interfacial Polymerization ◽

Polymer Network ◽

Water Desalination ◽

Nanocomposite Membrane ◽

Nanocomposite Membranes ◽

Reverse Osmosis Membranes

ABSTRACTEfficient water desalination constitutes a major challenge for the next years and reverse osmosis membranes will play a key role to achieve this target. In this work, a high-performance reverse osmosis nanocomposite membrane was prepared by interfacial polymerization in presence of multiwalled carbon nanotubes. The effect of carbon nanotubes on the chlorine resistance, antifouling and desalination performance of the nanocomposite membranes was studied. We found that the addition of carbon nanotubes not only improved the membrane performance in terms of flow and antifouling, but also inhibited the chlorine degradation of these membranes. Several reports have acknowledged the benefits of adding carbon nanotubes to aromatic PA nanocomposite membranes, but little attention has been paid to the mechanisms related to the improvement of flow rate, selectivity and chlorine tolerance. We carried out a comprehensive study of the chemical and physical effects of carbon nanotubes on the fully crosslinked polyamide network. The chemical structure, chlorine resistance and membrane degradation was studied by several analytical techniques, permeation and fouling studies, whereas the microstructure of the nanocomposite was studied by small and wide angle X-ray scattering, high resolution transmission electron microscopy, and molecular dynamics. We found that the addition of the nanotube affects the interfacial polymerization, resulting in a polymer network with smaller pore size and higher sodium and chlorine rejection. We simulated the hydration of the membrane in seawater and found that the radial distribution function of water confined in the pores of the nanocomposite membrane exhibited smaller clusters of water molecules, thus suggesting a dense membrane structure. We analysed the network mobility and found that the nanotube provides mechanical stability to the polymer matrix. This study presents solid evidence towards more efficient and robust reverse osmosis membranes using carbon nanotubes as mechanical reinforcing and chlorine protection additive.

Download Full-text

High-performance asymmetric isoporous nanocomposite membranes with chemically-tailored amphiphilic nanochannels

Journal of Materials Chemistry A ◽

10.1039/d0ta01023e ◽

2020 ◽

Vol 8 (19) ◽

pp. 9554-9566 ◽

Cited By ~ 2

Author(s):

Zhenzhen Zhang ◽

Md. Mushfequr Rahman ◽

Clarissa Abetz ◽

Volker Abetz

Keyword(s):

Small Molecules ◽

High Performance ◽

Nanocomposite Membrane ◽

Nanocomposite Membranes

An isoporous nanocomposite membrane is fabricated and displays the potential to separate small molecules with good antifouling and high permeance.

Download Full-text

High-Performance Polyamide Thin-Film Nanocomposite Membranes Containing ZIF-8/CNT Hybrid Nanofillers for Reverse Osmosis Desalination

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.9b04810 ◽

2019 ◽

Vol 59 (12) ◽

pp. 5324-5332 ◽

Cited By ~ 7

Author(s):

Tae Hoon Lee ◽

Ji Soo Roh ◽

Seung Yeon Yoo ◽

Jong Min Roh ◽

Tae Hwan Choi ◽

...

Keyword(s):

Thin Film ◽

Reverse Osmosis ◽

High Performance ◽

Nanocomposite Membranes ◽

Reverse Osmosis Desalination ◽

Thin Film Nanocomposite

Download Full-text

Reverse osmosis nanocomposite membranes containing graphene oxides coated by tannic acid with chlorine-tolerant and antimicrobial properties

Journal of Membrane Science ◽

10.1016/j.memsci.2016.04.026 ◽

2016 ◽

Vol 514 ◽

pp. 25-34 ◽

Cited By ~ 79

Author(s):

Hee Joong Kim ◽

Yong-Seok Choi ◽

Min-Young Lim ◽

Kyung Hwa Jung ◽

Dong-Gyun Kim ◽

...

Keyword(s):

Reverse Osmosis ◽

Tannic Acid ◽

Antimicrobial Properties ◽

Nanocomposite Membranes ◽

Graphene Oxides

Download Full-text

Polysulfone Membranes Based Hybrid Nanocomposites for the Adsorptive Removal of Hg(II) Ions

Polymers ◽

10.3390/polym13162792 ◽

2021 ◽

Vol 13 (16) ◽

pp. 2792

Author(s):

Abeer M. Alosaimi

Keyword(s):

Carbon Nanotubes ◽

High Performance ◽

Carbon Nanomaterials ◽

Chemical Properties ◽

Inorganic Nanoparticles ◽

Hybrid Nanocomposites ◽

Inversion Method ◽

Hybrid Nanocomposite ◽

Nanocomposite Membranes ◽

Oxidized Carbon

Organic–inorganic nanoparticles, which can improve and modify the mechanical and chemical properties of polymers, have been used as fillers to prepare high-performance hybrid nanocomposite membranes. In this study, we explored whether the incorporation of organic nanofillers (graphene (G), graphene oxide (GO), carbon nanotubes (CNTs), or oxidized carbon nanotubes (CNTOxi)) into polysulfone (PSF) and montmorillonite (MMt)-modified PSF membranes could enhance membrane performance for the removal of heavy metal ions from contaminated solutions. These hybrid membranes were prepared by a phase inversion method using chloroform as the solvent. The surface morphologies of the membranes revealed good dispersibility of the organoclay and carbon nanomaterials in the PSF matrix. The hybrid nanocomposite membranes showed significantly improved thermal stability and mechanical properties as compared to the pristine PSF and PSF/MMt membranes. The adsorption efficiencies of these hybrid adsorptive membranes for Hg(II), Pb(II), Sr(II), Fe(III), Zn(II), Ni(II), Al(III), Co(II), Y(III), and Cr(III) were investigated. The PSF/MMt/CNTOxi and PSF/MMt/GO membranes exhibited the highest adsorption efficiencies. In particular, these adsorptive membranes showed selectivity toward Hg(II), and the Hg(II) extraction percentage was maximized at pH 2. The maximum Hg(II) adsorption capacities of PSF/MMt/CNTOxi and PSF/MMt/GO were 151.36 and 144.89 mg/g, respectively, and the adsorption isotherm was in approval with the Langmuir model. These hybrid nanocomposites can be used in water purification application.

Download Full-text