Ultra-thin microporous membranes based on macrocyclic pillar[n]arene for efficient organic solvent nanofiltration

Fu, Wenming; Huang, Yangzheng; Deng, Luyao; Sun, Jinsheng; Li, Shao-Lu; Hu, Yunxia

doi:10.1016/j.memsci.2022.120583

Cited by 20 publications

(5 citation statements)

References 45 publications

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“…A TFCÀ P[n]a membrane was prepared using a macrocyclic molecular column (P[n]a) with an inherent angstrom-level cavity. [34] Introducing free-volume elements of a fixed size can improve the microporosity of the membrane to achieve high perm-selectivity. During the preparation process, P[5]a and P [6]a with hydroxyl structures react with TMC to form dense nanomembranes with the help of triethylamine (TEA), a catalyst on top of the crosslinked polyimide (PI) ultrafiltration substrate (Figure 2).…”

Section: Ip Methodsmentioning

confidence: 99%

Thin‐Film Composite Membranes for Organic Solvent Nanofiltration

Du,

Chen,

Yang

et al. 2023

ChemNanoMat

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Organic solvent nanofiltration (OSN) is an emerging separation technology. Significant efforts have been dedicated to designing and fabricating thin film composite (TFC) membranes for OSN in recent years. The development and utilization of TFC membranes in OSN are paramount in ensuring the permeability of organic solvent and rejection of solute. Additionally, researchers have delved into optimizing preprocessing and post‐treatment procedures during preparation. The preparation process has emerged as another avenue for improving the separation performance of TFC membranes. Simultaneously, various supports have been explored to enhance the TFC membranes' performance, including polymer substrates and inorganic substrates, as well as the interlayers between the substrate and the TFC membrane, each with unique advantages and disadvantages, and the choices of support depend on the specific requirements of the intended application. The limitations of conventional membranes could be overcome and thus achieve superior performance via an improved preparation strategy of the TFC membranes. This review presents a comprehensive overview of the preparation process for TFC membranes, including a detailed discussion of the preparation methods, the optimizing processes, and the substrates. Different TFC membranes for the OSN application is further discussed.

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Section: Ip Methodsmentioning

confidence: 99%

Thin‐Film Composite Membranes for Organic Solvent Nanofiltration

Du,

Chen,

Yang

et al. 2023

ChemNanoMat

View full text Add to dashboard Cite

show abstract

“…55 For instance, Bruggen et al used β-CD and polydopamine (pDA) as building blocks for giving a photocatalytic membrane with a stable AgBr–Ag 3 PO 4 photocatalyst, possessing good photocatalytic self-cleaning ability toward dyes. 60 Macrocycles with intrinsic cavities could provide direct evidence of subnano/nanopores and a feasible method for controlling their size. 59 However, unfunctionalized macrocycles tend to pack disorderly because of indistinguishable reactivities, making the membranes hundreds of nanometers thick, hindering the interconnection of macrocyclic cavity and formation of through-pores.…”

Section: Host–guest Nanochannels With Separation Featuresmentioning

confidence: 99%

Engineering solid nanochannels with macrocyclic host–guest chemistry for stimuli responses and molecular separations

Sun

Zhao

et al. 2023

Chem. Commun.

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“…Some of the macrocycles have been studied as functional units in the formation of nanofiltration membranes, such as cyclodextrins (CDs), 15 T h i s c o n t e n t i s trianglamines, 16 and pillararenes. 17 Macrocycle building units bring more intrinsic and extrinsic microporosity, which improves the separation permeance of the formed membrane. Similar to macrocycles, cyclen, which is known as a versatile monomer, has been employed as a building block to prepare the smart light adjustable-selectivity membranes.…”

Section: Introductionmentioning

confidence: 99%

“…Macrocycles make up a class of porous organic molecules comprising intrinsic nanostructures, which are expected to balance selectivity and permeance. Some of the macrocycles have been studied as functional units in the formation of nanofiltration membranes, such as cyclodextrins (CDs), trianglamines, and pillararenes . Macrocycle building units bring more intrinsic and extrinsic microporosity, which improves the separation permeance of the formed membrane.…”

Section: Introductionmentioning

confidence: 99%

Covalent Organic Network Membranes with Tunable Nanoarchitectonics from Macrocycle Building Blocks for Graded Molecular Sieving

Liu,

Du,

Yao

et al. 2024

ACS Appl. Mater. Interfaces

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Traditional piperazine-based polyamide membranes usually suffer from the intrinsic trade-off relationship between selectivity and permeance. The development of macrocycle membranes with customized nanoscale pores is expected to address this challenge. Herein, we introduce 1,4-diazacyclohexane (2N), 1,4,7-triazacyclononane (3N), and 1,4,8,11-tetraazacyclotetradecane (4N) as molecular building blocks to construct the nanoarchitectonics of polyamide membranes prepared from interfacial polymerization (IP). The permeance of covalent organic network membranes follows the trend of 4N-TMC > 3N-TMC > 2N-TMC, while the molecular weight cutoff (MWCO) also follows the same trend of 4N-TMC > 3N-TMC > 2N-TMC, according to their nanopore size of the membranes. The microporosity, orientation, and surface chemistry of covalent organic network membranes can be rationally designed by macrocycle building units. The ordered nanoarchitectonics allows the membranes to attain an excellent performance in graded molecular sieving. Importantly, the novel covalent organic network membranes with tunable nanoarchitectonics prepared from macrocycle building units exhibited high water permeance (32.5 LMH/bar) and retained long-term stability after 100 h of test and bovine serum albumin fouling. These results reveal the enormous potential of 3N-TMC and 4N-TMC membranes in saline textile wastewater treatments and precise molecular sieving.

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Ultra-thin microporous membranes based on macrocyclic pillar[n]arene for efficient organic solvent nanofiltration

Cited by 20 publications

References 45 publications

Thin‐Film Composite Membranes for Organic Solvent Nanofiltration

Thin‐Film Composite Membranes for Organic Solvent Nanofiltration

Engineering solid nanochannels with macrocyclic host–guest chemistry for stimuli responses and molecular separations

Covalent Organic Network Membranes with Tunable Nanoarchitectonics from Macrocycle Building Blocks for Graded Molecular Sieving

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