Constructing highly rough skin layer of thin film (nano)composite polyamide membranes to enhance separation performance: A review

Hu, Dan; Ren, Xiaomin; Fu, Hongyan; Wang, Yu; Feng, Xudong; Li, Hehe

doi:10.1002/app.52692

Cited by 16 publications

(4 citation statements)

References 135 publications

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“…Modifying the membrane with TiO 2 microflowers led to ridge and valley structures that enhanced its roughness. The ridges on the membrane surface created effective water permeation pathways, even when contaminants covered the valleys [73]. The TiO 2 microflowers' hierarchical structure successfully prevented liquid from entering the membrane pores and kept them dry by forming an air layer on the membrane's surface.…”

Section: Discussionmentioning

confidence: 99%

A CFD Analysis of the Desalination Performance of Ceramic-Based Hollow Fiber Membranes in Direct Contact Membrane Distillation

Alrefaai,

Othman,

Rava

et al. 2024

Ceramics

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In this numerical study, the performance of ceramic-based mullite hollow fiber (HF) membranes in a direct contact membrane distillation (DCMD) process was evaluated. Three types of membranes were tested: (i) hydrophobic membrane C8-HFM, (ii) rod-like omniphobic membrane (C8-RL/TiO2), and (iii) flower-like omniphobic membrane (C8-FL/TiO2). The CFD model was developed and validated with experimental results, which were performed over a 500 min period. The initial mass flux of C8-HFM was 30% and 9% higher than that of C8-FL/TiO2 and C8-RL/TiO2, respectively. However, the flower-like omniphobic membrane C8-FL/TiO2 had the lowest drop in flux, around 11%, while the rod-like omniphobic membrane C8-RL/TiO2 had a 15% reduction, both better than the 23% reduction in the hydrophobic membrane C8-HFM over the 500 min. The study also analyzed the impact of fouling by examining the variation in mass transfer coefficient (MTC) over time. The results indicated that the ceramic-based mullite HF membranes with TiO2 flowers and rods demonstrated a high resistance to fouling compared to C8-HFM. The modified membranes could find applications in the desalination and handling of seawater samples containing organic contaminants. The CFD model’s versatility can be utilized beyond the current investigation’s scope, offering a valuable tool for efficient membrane development solutions, particularly for challenges such as the presence of organic contaminants in seawater.

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Section: Discussionmentioning

confidence: 99%

A CFD Analysis of the Desalination Performance of Ceramic-Based Hollow Fiber Membranes in Direct Contact Membrane Distillation

Alrefaai,

Othman,

Rava

et al. 2024

Ceramics

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“…Compared with ISA HF OSN membranes, TFC HF OSN membranes usually have better solvent permeability, and the thin-film skin layer could be individually designed to meet the separation requirements of different processes. However, TFC membranes face the problem of shedding of selective layer [ 69 ] and difficulty to avoid or remove membrane fouling [ 69 , 70 ].…”

Section: Structures and Preparation Methods Of Hf Osn Membranesmentioning

confidence: 99%

Hollow Fiber Membrane for Organic Solvent Nanofiltration: A Mini Review

Liu

Wang

et al. 2022

Membranes

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Organic solvents take up 80% of the total chemicals used in pharmaceutical and related industries, while their reuse rate is less than 50%. Traditional solvent treatment methods such as distillation and evaporation have many disadvantages such as high cost, environmental unfriendliness, and difficulty in recovering heat-sensitive, high-value molecules. Organic solvent nanofiltration (OSN) has been a prevalent research topic for the separation and purification of organic solvent systems since the beginning of this century with the benefits of no-phase change, high operational flexibility, low cost, as well as environmental friendliness. Especially, hollow fiber (HF) OSN membranes have gained a lot of attention due to their high packing density and easy scale-up as compared with flat-sheet OSN membranes. This paper critically reviewed the recent research progress in the preparation of HF OSN membranes with high performance, including different materials, preparation methods, and modification treatments. This paper also predicts the future direction of HF OSN membrane development.

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“…The result is an 84.38% increase in water flux compared to the TFC control membrane . The TFN membranes could improve permeability and broke the “trade-off” effect. , The nanomaterials applied in the development of novel TFN membranes create additional transport area for water transfer, and the flux compared to conventional TFN membranes increased by 196%, without a significant decrease in salt rejection . Ma and his colleagues functionalized MoS 2 by Tannins.…”

Section: Introductionmentioning

confidence: 99%

Etching Strategy for Nanofiltration Membranes Prepared with Two-Dimensional Nanochannels for Seawater Desalination

Tang,

Zhao,

Deng

et al. 2024

Ind. Eng. Chem. Res.

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Up to now, developing nanofiltration (NF) membranes with outstanding salt rejection and excellent permeability has become a crucial challenge. In this work, thin film composite (TFC) membranes containing two-dimensional nanochannels were successfully prepared using 2D Mg(OH)2 nanosheets as sacrifice templates. The nanosheets were dispersed in trimethyl chloride/n-hexane and then incorporated into the polypiperamide layer by interfacial polymerization. The introduction of Mg(OH)2 and etching with H2SO4 (pH = 3) can increase membrane flux without rejection loss. The 2D nanochannels provided additional transport routes for water molecules. The prepared TFC membranes formed a root-like morphology on the surface, along with a thinner selective layer and lower cross-linking, contributing to the increase in water flux. Therefore, the desalination performance of etched membranes was better than control membranes. The membrane made from 0.05 wt % Mg(OH)2 shows a Na2SO4 rejection of 98.25%, and water flux increases by 72.8%. The TFC membranes prepared in this work have high stability in operation and have even better antifouling properties. This approach provides a new strategy for the preparation of high-performance NF membranes, which is applied in seawater desalination.

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Constructing highly rough skin layer of thin film (nano)composite polyamide membranes to enhance separation performance: A review

Cited by 16 publications

References 135 publications

A CFD Analysis of the Desalination Performance of Ceramic-Based Hollow Fiber Membranes in Direct Contact Membrane Distillation

A CFD Analysis of the Desalination Performance of Ceramic-Based Hollow Fiber Membranes in Direct Contact Membrane Distillation

Hollow Fiber Membrane for Organic Solvent Nanofiltration: A Mini Review

Etching Strategy for Nanofiltration Membranes Prepared with Two-Dimensional Nanochannels for Seawater Desalination

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