Carbon nanotube immobilized membrane with controlled nanotube incorporation via phase inversion polymerization for membrane distillation based desalination

Ragunath, S.; Roy, Sagar; Mitra, Somenath

doi:10.1016/j.seppur.2017.11.053

Cited by 59 publications

(18 citation statements)

References 52 publications

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“…Increasing in the thermal stability of GOIM-P could be due to GO particles and the functional groups on GO that play the role as a reducing and sacrificed agent that lead to slow down or limit the degradation process [ 51 ]. The result is in line with what we have reported previously [ 32 , 36 ].…”

Section: Resultssupporting

confidence: 94%

“…Several hydrophobic polymers, including polytetrafluoroethylene (PTFE), polypropylene (PP), and polyvinylidene difluoride (PVDF) have been utilized as membrane materials [ 9 , 21 , 22 , 23 ], and different methods have been employed for the synthesis and modification of these membranes to improve the performances [ 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. Nanotechnology has enabled the development of advanced membranes based separation techniques [ 18 , 24 , 26 , 29 , 31 , 32 , 33 , 34 , 35 , 37 , 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

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Immobilization of Graphene Oxide on the Permeate Side of a Membrane Distillation Membrane to Enhance Flux

et al. 2018

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In this paper, a facile fabrication of enhanced direct contact membrane distillation membrane via immobilization of the hydrophilic graphene oxide (GO) on the permeate side (GOIM-P) of a commercial polypropylene supported polytetrafluoroethylene (PTFE) membrane is presented. The permeate side hydrophilicity of the membrane was modified by immobilizing the GO to facilitate fast condensation and the withdrawal of the permeate water vapors. The water vapor flux was found to be as high as 64.5 kg/m2·h at 80 °C, which is 15% higher than the unmodified membrane at a feed salt concentration of 10,000 ppm. The mass transfer coefficient was observed 6.2 × 10−7 kg/m2·s·Pa at 60 °C and 200 mL/min flow rate in the GOIM-P.

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Section: Resultssupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Immobilization of Graphene Oxide on the Permeate Side of a Membrane Distillation Membrane to Enhance Flux

et al. 2018

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“…SWCNTs have better properties than MWCNTs, but difficult dispersion is a noticeable issue. In addition to the known eminent hydrophobicity of the CNTs, the inclusion of CNTs increases the membrane surface roughness, which enhances the membrane surface hydrophobicity, a critical property for many MD applications [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Triple-Layer Nanocomposite Membrane Prepared by Electrospinning Based on Modified PES with Carbon Nanotubes for Membrane Distillation Applications

et al. 2020

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In this work, a novel triple-layer nanocomposite membrane prepared with polyethersulfone (PES)/carbon nanotubes (CNTs) as the primary bulk material and poly (vinylidene fluoride-co-hexafluoro propylene) (PcH)/CNTs as the outer and inner surfaces of the membrane by using electrospinning method is introduced. Modified PES with CNTs was chosen as the bulk material of the triple-layer membrane to obtain a high porosity membrane. Both the upper and lower surfaces of the triple-layer membrane were coated with PcH/CNTs using electrospinning to get a triple-layer membrane with high total porosity and noticeable surface hydrophobicity. Combining both characteristics, next to an acceptable bulk hydrophobicity, resulted in a compelling membrane for membrane distillation (MD) applications. The prepared membrane was utilized in a direct contact MD system, and its performance was evaluated in different salt solution concentrations, feed velocities and feed solution temperatures. The results of the prepared membrane in this study were compared to those reported in previously published papers. Based on the evaluated membrane performance, the triple-layer nanocomposite membrane can be considered as a potential alternative with reasonable cost, relative to other MD membranes.

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“…In both cases, wetting the pores caused by organic fouling can be limited by using surface-modified membranes. This concept was presented in several works, where membranes with additional thin layers were covered [ 12 , 13 , 14 , 15 ] or nanoparticles to membrane structure were added [ 4 , 16 ]. Unfortunately, long-term studies with intensive fouling and scaling have most often been omitted in these works.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Membrane Wetting by Applying a Low Temperature Membrane Distillation

Gryta

2020

Membranes

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The formation of deposits on the membrane surface during membrane distillation is considered as one of the main reasons for membrane wetting. To assess the intensity of this phenomenon, long-term studies were performed comparing the membrane wettability with non-fouling feed (NaCl solutions) and feeds containing various foulants (lake and Baltic Sea water). The polypropylene membranes used were non-wetted by NaCl solutions during several hundred hours of water desalination. However, the occurrence of CaCO3 or other salt crystallization caused the membranes to be partially wetted, especially when periodical membrane cleaning was applied. The scaling intensity was significantly reduced by lowering the feed temperature from 353 to 315 K, which additionally resulted in the limitation of the degree of membrane wetting.

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Carbon nanotube immobilized membrane with controlled nanotube incorporation via phase inversion polymerization for membrane distillation based desalination

Cited by 59 publications

References 52 publications

Immobilization of Graphene Oxide on the Permeate Side of a Membrane Distillation Membrane to Enhance Flux

Immobilization of Graphene Oxide on the Permeate Side of a Membrane Distillation Membrane to Enhance Flux

Triple-Layer Nanocomposite Membrane Prepared by Electrospinning Based on Modified PES with Carbon Nanotubes for Membrane Distillation Applications

Mitigation of Membrane Wetting by Applying a Low Temperature Membrane Distillation

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