Porous organic framework membranes based on interface-induced polymerisation: design, synthesis and applications

Chemical Science, Journal Year: 2024, Volume and Issue: 15(6), P. 1924 - 1937

Published: Jan. 1, 2024

Porous organic frameworks (POFs) are novel porous materials that have attracted much attention due to their extraordinary properties, such as high specific surface area, tunable pore size, stability and ease of functionalisation. However, conventional synthesised POFs mostly large-sized particles or insoluble powders, which difficult recycle low mass transfer efficiencies, limiting the development cutting-edge applications. Therefore, processing POF into membrane structures is great significance. In recent years, interface engineering strategies proved be efficient methods for formation membranes. this perspective, advances in use interfaces prepare membranes reviewed. The challenges strategy potential applications formed discussed.

Language: Английский

---

Efficient Ion Screening Boosted by MOF/COF Bilayer Membrane Through Multiple Separation Mechanisms

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 27, 2024

Abstract Porous organic frameworks (POFs), including metal‐organic (MOFs) and covalent (COFs), have drawn attention as ion‐selective materials due to their well‐defined channels functional sites. However, individual limitations require novel approaches maximize potential. In this study, a hybrid bilayer membrane combining MOFs COFs on nylon substrate via consecutive liquid‐liquid interface polymerization is developed. This method forms robust chemical bonds between the MOF COF layers, creating efficient ion transport channels. The integration of ZIF‐8 (MOF layer), which exhibits strong electrostatic repulsion against cations, with TpPa‐SO 3 H (COF offering cation coordination, results in synergistic effect that significantly enhances separation. ZIF‐8/TpPa‐SO H/nylon achieved Li + /Mg 2+ separation ratio 501, 400 times higher than pristine 200 membrane. outstanding performance combined layer coordination layer, enabling precise discrimination. membrane's structural integrity stability further contribute its superior efficiency, making it promising candidate for large‐scale lithium extraction from salt lakes.

Language: Английский

---

The Incorporation of Nanoconfined Poly(ionic liquid)s with Two-Dimensional Covalent Organic Frameworks to Enhance Proton Conduction

Molecules, Journal Year: 2025, Volume and Issue: 30(5), P. 1004 - 1004

Published: Feb. 21, 2025

Covalent organic frameworks (COFs) hold promising potential as high-temperature proton conductors due to their highly ordered nanostructures and high specific surface areas. However, limited functional groups poor membrane-engineering properties, finding practical applications for COF-based proton-conducting materials still remains challenging. Herein, we proposed a universal strategy fabricate composite membranes by the incorporation of sulfonic acid-bearing COFs zwitterionic poly(ionic liquid)s (PILs) via in situ polymerization. Zwitterionic PILs with methanesulfonate counter ions can work intrinsic sources, acid on COF nanochannels act extrinsic suppliers. Benefiting from spatial nanoconfinement long-range enhanced electrostatic interactions PILs, densities endow as-prepared membrane (PIL@TpBD(SO3H)2) comparable anhydrous conductivity 3.20 × 10-3 S cm-1 at 90 °C, which is much higher than that conventional Nafion (~10-5 °C under condition). 1H NMR DOSY spectra reveal both diffusion dissociation protons be drastically facilitated upon nanoconfinement, demonstrating efficiency conduction. Moreover, obtained possess outstanding mechanical thermal stability, crucial application. This study demonstrates conduction elevation nanoconfined provides insight into engineering stable materials.

Language: Английский

---

Boosting proton conductivity: Integrating rigid porous aromatic frameworks into sulfonated poly(ether ether ketone) membranes

Inorganic Chemistry Communications, Journal Year: 2025, Volume and Issue: unknown, P. 114348 - 114348

Published: March 1, 2025

Language: Английский

---

Zwitterionic Nanochannels in Covalent Organic Framework Membranes for Improved Flux and Antifouling Property

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 23, 2024

Abstract Zwitterionic membranes demonstrate excellent antifouling property in water purification. The covalent organic frameworks (COFs), due to the ordered channels and abundant functional groups, have distinct superiority constructing zwitterionic surfaces.Here, COF membrane is prepared with precise framework structures uniform charge distribution. negatively charged 4,4′‐diaminobiphenyl‐2,2′‐sisulphonic acid sodium (SA) positively ethidium bromide (EB) fragments are used react 1,3,5‐triformylphloroglucinol (TP) at gas‐liquid interface prepare membrane. complementary inter‐layer inner‐layer facilitate formation of continuous tight hydration layer on surface pore walls resist adsorption pollutants. effectively resists both bovine serum albumin lysozyme pollutants flux recovery ratio (FRR) 97% 85%, respectively. Furthermore, regular nano‐channels balanced interactions between surface/pore result outstanding permeability up 146 L m −2 h −1 bar dye/salt separation selectivity. permeation mechanism elucidated by experimental molecular dynamics calculation. can find promising applications preparing high‐performance membranes.

Language: Английский

---

Highly flexible SCOF proton exchange membrane reinforced with PTFE to enhance fuel cell power density

Journal of Membrane Science, Journal Year: 2024, Volume and Issue: 715, P. 123479 - 123479

Published: Nov. 4, 2024

Language: Английский

---

Ultrathin Zwitterionic COF Membranes from Colloidal 2D-COF towards Precise Molecular Sieving

Water Research, Journal Year: 2024, Volume and Issue: 274, P. 123073 - 123073

Published: Dec. 30, 2024

Language: Английский

---