Functionalized open-ended vertically aligned carbon nanotube composite membranes with high salt rejection and enhanced slip flow for desalination

Vahdatifar, Sahar; Khodadadi, Abbas Ali; Mortazavi, Yadollah; Greenlee, Lauren F.

doi:10.1016/j.seppur.2021.119773

Cited by 13 publications

(2 citation statements)

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“…The maximum wavelength of the BSA solutions was detected at 720 nm. The water flow velocity over time regarding the membrane water permeability [ 38 ] and the membrane rejection corresponding to the number of particles that were removed from the feed water [ 39 ] were calculated using the equations reported in our previous work [ 33 , 40 ].…”

Section: Methodsmentioning

confidence: 99%

Effects of Benzalkonium Chloride Contents on Structures, Properties, and Ultrafiltration Performances of Chitosan-Based Nanocomposite Membranes

et al. 2022

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The effects of benzalkonium chloride (BKC) contents on the structure, properties, and ultrafiltration performance of chitosan-based nanocomposite membranes containing poly(ethylene glycol) and multi-walled carbon nanotube (chitosan/BKC/PEG/CNT) were examined. The membranes were prepared by a mixing solution method and phase inversion before being characterized with microscopic techniques, tensile tests, thermogravimetric analysis, water contact angle, and porosity measurements. The performance of the nanocomposite membranes in regard to permeability (flux) and permselectivity (rejection) was examined. The results show that the incorporation of BKC produced nanocomposite membranes with smaller pore structures and improved physico-chemical properties, such as an increase in porosity and surface roughness (Ra = 45.15 to 145.35 nm and Rq = 53.69 to 167.44 nm), an enhancement in the elongation at break from 45 to 109%, and an enhancement in the mechanical strength from 31.2 to 45.8 MPa. In contrast, a decrease in the membrane hydrophilicity (water contact angle increased from 56.3 to 82.8°) and a decrease in the average substructure pore size from 32.64 to 10.08 nm were observed. The membrane rejection performances toward Bovine Serum Albumin (BSA) increased with the BKC composition in both dead-end and cross-flow filtration processes. The chitosan/BKC/PEG/CNT nanocomposite membranes have great potential in wastewater treatments for minimizing biofouling without reducing the water purification performance.

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Section: Methodsmentioning

confidence: 99%

Effects of Benzalkonium Chloride Contents on Structures, Properties, and Ultrafiltration Performances of Chitosan-Based Nanocomposite Membranes

et al. 2022

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“…In the vertically aligned CNT membranes, the CNTs were aligned perpendicularly on a substrate to enable the water transport through the CNT interior [53] while in BP and mixed-matrix CNT membranes, the CNTs were randomly oriented within large porous membrane structures [54] , [55] . The vertical alignment of CNTs into resilient membrane structures is quite complicated process to achieve and scale-up, while gaps between the nanotubes require to be filled by polymeric or inorganic materials to support the membrane structure, leading to permeability decline [56] , [57] , [58] .…”

Section: Introductionmentioning

confidence: 99%