Selective liquid-phase molecular sieving via thin metal–organic framework membranes with topological defects

Nature Chemical Engineering, Journal Year: 2024, Volume and Issue: 1(7), P. 483 - 493

Published: July 25, 2024

Language: Английский

---

Rapid and Precise Molecular Nanofiltration Using Ultra‐Thin‐Film Membranes Derived from 6,6′‐Dihydroxy‐2,2′‐biphenyldiamine

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 20, 2024

Abstract A key challenge in efficient molecular separation is fabricating large‐scale, highly selective polymeric membranes with precise pore control at the scale. Herein, a new contorted monomer 6,6′‐dihydroxy‐2,2′‐biphenyldiamine (DHBIPDA) introduced as building block to generate cross‐linked, ultra‐thin microporous nanofilms (sub‐10 nm) via interfacial polymerization, enabling rapid, and nanofiltration. Using diacyl chloride (TPC) cross‐linker instead of trimesoyl (TMC) significantly reduces sizes within achieves narrower distribution due semi‐crystalline structure. The film structures are confirmed using comprehensive characterization techniques including wide‐angle X‐ray scattering (WAXS), diffraction (XRD), positron annihilation lifetime spectroscopy (PALS), CO 2 adsorption analysis, molecular‐scale simulation. DHBIPDA/TPC DHBIPDA/TMC achieve methanol permeance values up 16.4 15.1 LMH bar −1 coupled weight cutoffs (MWCOs) low 283 306 Da, respectively. membrane demonstrates both higher selectivity compared its relatively disordered counterpart DHBIPDA/TMC, consistent data. DHBIPDA‐derived efficiently separates dye mixtures similar weights enables effective recycling organometallic homogeneous catalysts, suggesting potential for industrial applications.

Language: Английский

---

Organic solvent nanofiltration membranes for separation in non-polar solvent system

Green Energy & Environment, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 1, 2024

Membrane technology holds significant potential for augmenting or partially substituting conventional separation techniques, such as heat-driven distillation, thereby reducing energy consumption. Organic solvent nanofiltration represents an advanced membrane capable of discerning molecules within a molecular weight range approximately 100 to 1000 Da in organic solvents, offering low requirements and minimal carbon footprints. Molecular non-polar system, toluene, n-hexane, n-heptane, has gained paramount importance due their extensive use the pharmaceutical, biochemical, petrochemical industries. In this review, we presented recent advancements materials, fabrication techniques promising applications encompassing hydrocarbon separation, bioactive molecule purification recovery. Furthermore, review highlighted challenges opportunities associated with scale-up strategies direct translation into industrial applications.

Language: Английский

---

Temperature-Modulated Interfacial Synthesis of Fully Aromatic Polyurea for Superior Solvent/Thermal-Resistant Separation

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(5), P. 1897 - 1905

Published: April 10, 2024

Polyurea, owing to its superior solvent resistance and thermal/acid stability, has emerged as an attractive platform replace the benchmark polyamide membranes for various applications, especially in harsh separation scenarios. Herein, we present effective strategy elaborate a fully aromatic polyurea membrane (FAPM) that enables solvent-/thermal-resistant performances through temperature-modulated interfacial polymerization at alkane-ionic liquid interface. The key of our design lies harnessing exceptional solvency ionic develop polyamines instead conventional aliphatic ones, combining synthesis overcome inherently sluggish kinetics toluene diisocyanate boosting their reaction rate by 466 times. With this design, defect-free robust FAPM can be facilely synthesized short time deliver high stable performance even dimethylformamide 80 °C. This work introduces novel direction exploiting materials toward environments.

Language: Английский

---

Polyamide Thin-Film Composite Membranes with Enhanced Interfacial Stability for Durable Organic Solvent Nanofiltration

Journal of Membrane Science, Journal Year: 2024, Volume and Issue: 704, P. 122841 - 122841

Published: May 3, 2024

Language: Английский

---