Development of cellulose triacetate asymmetric hollow fiber membranes with highly enhanced compaction resistance for osmotically assisted reverse osmosis operation applicable to brine concentration

Nakao, Takayuki; Goda, Shohei; Miura, Yuki; Yasukawa, Masahiro; Ishibashi, Miharu; Nakagawa, Keizo; Shintani, Takuji; Matsuyama, Hideto; Yoshioka, Tomohisa

doi:10.1016/j.memsci.2022.120508

Cited by 12 publications

(4 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A comparison of the performance changes before and after the membrane modification for 50 h of continuous operation is demonstrated in Figure b. The permeance of the membrane TFC-SP has been in a slow decreasing trend, which is mainly due to the continuous contaminant build-up, high pressure compaction, and clogging of membrane pores. ,− The permeance of membrane TFC-0 decreased from 1.42 L m –2 h –1 bar –1 at the beginning to 1.31 L m –2 h –1 bar –1 after 50 h, which was basically stabilized, mainly because of the heavy build-up on the membrane surface itself. In contrast, modified membranes are susceptible to more severe concentration polarization and membrane contamination due to the high permeance brought about by the unblocked pores. , The permeance of 3.13 L m –2 h –1 bar –1 was maintained after 50 h of testing, which is still more than twice as much as that of the original membrane, and also basically stabilized after 35 h of operation.…”

Section: Resultsmentioning

confidence: 97%

Solvent Activation for Building a Homogeneous Polyamide Layer to Enhance Reverse Osmosis Membrane Permeability

Liu,

Liang,

Dai

et al. 2024

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Water scarcity has driven increased research on enhancing reverse osmosis (RO) membranes. Current research methods are time-consuming and not suitable for industrial applications. In this study, a more uniform PA layer with high hydrophilicity was prepared by utilizing dimethyl sulfoxide (DMSO) to optimize the interfacial polymerization process and 4-dimethylaminopyridine (DMAP) in postprocessing to improve water adsorption and transport. Characterization and molecular dynamics simulations showed that DMSO enhances the distribution state of trimesoyl chloride at the interface and acts as a cosolvent to optimize the monomer potential energy state during the interfacial reaction. This results in a thinner PA layer due to improved reaction homogeneity and monomer diffusivity. DMSO, as a polar aprotic solvent, enhances the nucleophilicity of DMAP, which effectively removes surface residues on the PA layer and weakens its spatial effects, leading to enhanced membrane permeability. The synergistic effect of DMSO and DMAP results in a high water permeance of 3.95 L m −2 h −1 bar −1 and maintains a high salt rejection of R NaCl = 98.47% (a 0.78% decrease) compared to the performance of the pristine RO membrane (1.42 L m −2 h −1 bar −1 , R NaCl = 99.25%). This study provides a simple strategy for the industrial preparation of highly permeable RO membranes and sheds light on the role of polar aprotic solvents and nucleophilic reagents in enhancing membrane permeance.

show abstract

Section: Resultsmentioning

confidence: 97%

Solvent Activation for Building a Homogeneous Polyamide Layer to Enhance Reverse Osmosis Membrane Permeability

Liu,

Liang,

Dai

et al. 2024

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

show abstract

“…Then, the resulting membrane is heated for annealing. Finally, the resulting RO membrane is stored in water for further uses [26,[44][45][46][47][48]98].…”

Section: Cellulose Acetate Ro Membranementioning

confidence: 99%

Cellulose Acetate Membranes: Fouling Types and Antifouling Strategies—A Brief Review

et al. 2023

View full text Add to dashboard Cite

Cellulose acetate (CA) is a semisynthetic, biodegradable polymer. Due to its characteristics, CA has several applications, including water membranes, filament-forming matrices, biomedical nanocomposites, household tools, and photographic films. This review deals with topics related to the CA membranes, which are prepared using different techniques, such as the phase inversion technique. CA membranes are considered very important since they can be used as microfiltration membranes (MF), ultrafiltration membranes (UF), nanofiltration membranes (NF), reverse osmosis (RO) membranes, and forward osmosis (FO) membranes. Membrane fouling results from the accumulation of materials that the membrane rejects on the surface or in the membrane’s pores, lowering the membrane’s flux and rejection rates. There are various forms of CA membrane fouling, for instance, organic, inorganic, particulate fouling, and biofouling. In this review, strategies used for CA membrane antifouling are discussed and summarized into four main techniques: feed solution pretreatment, cleaning of the membrane surface, membrane surface modification, which can be applied using either nanoparticles, polymer reactions, surface grafting, or surface topography, and surface coating.

show abstract

“…A surge of interest in developing polymeric hollow fiber membranes has been witnessed in the past few decades. Examples of polymers reported include polysulfone (PSF) [ 80 , 81 , 82 , 83 ], polyethersulfone (PES) [ 84 , 85 , 86 , 87 ], cellulose acetate [ 88 , 89 , 90 ], polyimide [ 91 , 92 , 93 , 94 ], polyetherimide [ 95 , 96 , 97 , 98 ], polycarbonate (PC) [ 99 , 100 ], polyvinylidene fluoride (PVDF) [ 83 , 86 , 101 , 102 , 103 , 104 , 105 , 106 , 107 ], and polybenzimidazole (PBI) [ 108 , 109 ]. The fabrication of polymeric hollow fiber membranes follows the common practice mentioned previously, which often includes a post-treatment such as silicon rubber coating to seal the defects on hollow fiber membranes for superior separation performance [ 110 ].…”

Section: Types Of Hollow Fiber and Their Preparation Routementioning

confidence: 99%

State-of-the-Art Organic- and Inorganic-Based Hollow Fiber Membranes in Liquid and Gas Applications: Looking Back and Beyond

Lau

Soh

et al. 2022

Membranes

View full text Add to dashboard Cite

The aggravation of environmental problems such as water scarcity and air pollution has called upon the need for a sustainable solution globally. Membrane technology, owing to its simplicity, sustainability, and cost-effectiveness, has emerged as one of the favorable technologies for water and air purification. Among all of the membrane configurations, hollow fiber membranes hold promise due to their outstanding packing density and ease of module assembly. Herein, this review systematically outlines the fundamentals of hollow fiber membranes, which comprise the structural analyses and phase inversion mechanism. Furthermore, illustrations of the latest advances in the fabrication of organic, inorganic, and composite hollow fiber membranes are presented. Key findings on the utilization of hollow fiber membranes in microfiltration (MF), nanofiltration (NF), reverse osmosis (RO), forward osmosis (FO), pervaporation, gas and vapor separation, membrane distillation, and membrane contactor are also reported. Moreover, the applications in nuclear waste treatment and biomedical fields such as hemodialysis and drug delivery are emphasized. Subsequently, the emerging R&D areas, precisely on green fabrication and modification techniques as well as sustainable materials for hollow fiber membranes, are highlighted. Last but not least, this review offers invigorating perspectives on the future directions for the design of next-generation hollow fiber membranes for various applications. As such, the comprehensive and critical insights gained in this review are anticipated to provide a new research doorway to stimulate the future development and optimization of hollow fiber membranes.

show abstract

Development of cellulose triacetate asymmetric hollow fiber membranes with highly enhanced compaction resistance for osmotically assisted reverse osmosis operation applicable to brine concentration

Cited by 12 publications

References 38 publications

Solvent Activation for Building a Homogeneous Polyamide Layer to Enhance Reverse Osmosis Membrane Permeability

Solvent Activation for Building a Homogeneous Polyamide Layer to Enhance Reverse Osmosis Membrane Permeability

Cellulose Acetate Membranes: Fouling Types and Antifouling Strategies—A Brief Review

State-of-the-Art Organic- and Inorganic-Based Hollow Fiber Membranes in Liquid and Gas Applications: Looking Back and Beyond

Contact Info

Product

Resources

About