Ice-confined synthesis of highly ionized 3D-quasilayered polyamide nanofiltration membranes

Science, Journal Year: 2023, Volume and Issue: 382(6667), P. 202 - 206

Published: Oct. 12, 2023

Existing polyamide (PA) membrane synthesis protocols are underpinned by controlling diffusion-dominant liquid-phase reactions that yield subpar spatial architectures and ionization behavior. We report an ice-confined interfacial polymerization strategy to enable the effective kinetic control of reaction thermodynamic manipulation hexagonal polytype (Ih) ice phase containing monomers rationally synthesize a three-dimensional quasilayered PA for nanofiltration. Experiments molecular simulations confirmed underlying formation mechanism. Our nanofiltration features high-density ionized structure exceptional transport channels, realizing superior water permeance excellent ion selectivity.

Language: Английский

---

Polyester Nanofiltration Membranes for Efficient Cations Separation

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(9)

Published: Oct. 31, 2023

Abstract Polyester nanofiltration membranes highlight beneficial chlorine resistance, but their loose structures and negative charge result in poor cations retention precluding advanced use separation. This work designs a new monomer (TET) containing “hydroxyl‐ammonium” entities that confer dense positive to polyester membranes. The TET undergoes efficient interfacial polymerization with the trimesoyl chloride (TMC) monomer, resultant TET‐TMC feature one of lowest molecular weight cut‐offs (389 Da) highest zeta potential (4 mv, pH: 7) among all MgCl 2 rejection membrane is 95.5%, significantly higher than state‐of‐the‐art (<50%). Li + /Mg 2+ separation performance on par cutting‐edge polyamide membranes, while additionally, stable against NaClO though readily degrade. Thus first for

Language: Английский

---

Two‐Dimensional Covalent Organic Framework Membranes for Liquid‐Phase Molecular Separations: State of the Field, Common Pitfalls, and Future Opportunities

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(1)

Published: April 4, 2023

Abstract 2D covalent organic frameworks (2D COFs) are attractive candidates for next‐generation membranes due to their robust linkages and uniform, tunable pores. Many publications have claimed achieve selective molecular transport through COF pores, but reported performance metrics similar networks vary dramatically, in several cases the experiments inadequate support such conclusions. These issues require a reevaluation of literature. Published examples liquid‐phase separations can be broadly divided into two categories, each with common characteristics: polycrystalline films (most >1 µm thick) weakly crystalline or amorphous <500 nm thick). Neither category has demonstrated consistent relationships between designed pore structure separation performance, suggesting that these imperfect materials do not sieve molecules uniform In this perspective, rigorous practices evaluating membrane structures described, which will facilitate development toward molecularly precise capable performing previously unrealized chemical separations. absence more standard proof, reports COF‐based should treated skepticism. As methods control polymerization improve, polymer may exhibit exquisite energy efficient relevant contemporary challenges.

Language: Английский

---

Self-driven oil/water separator with super-high separation rate

Nano Energy, Journal Year: 2023, Volume and Issue: 119, P. 109066 - 109066

Published: Nov. 7, 2023

Language: Английский

---

Flexible hemline-shaped microfibers for liquid transport

Nature Chemical Engineering, Journal Year: 2024, Volume and Issue: 1(1), P. 87 - 96

Published: Jan. 11, 2024

Language: Английский

---

A precise pyromellitic acid grafting prepared multifunctional MXene membranes for efficient oil-in-water emulsion separation and heavy metal ions removal

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 472, P. 144904 - 144904

Published: July 19, 2023

Language: Английский

---

Double charge flips of polyamide membrane by ionic liquid-decoupled bulk and interfacial diffusion for on-demand nanofiltration

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 13, 2024

Fine design of surface charge properties polyamide membranes is crucial for selective ionic and molecular sieving. Traditional face limitations due to their inherent negative limited modification range. Herein, we report a facile liquid-decoupled bulk/interfacial diffusion strategy elaborate the double flips membranes, enabling on-demand transformation from inherently highly positive near-neutral charges. The key these lies in meticulous utilization liquid that decouples intertwined diffusion, enhancing interfacial while inhibiting bulk diffusion. These charge-tunable can be customized impressive separation performance, example, profound Cl

Language: Английский

---

Empowering ultrathin polyamide membranes at the water–energy nexus: strategies, limitations, and future perspectives

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(9), P. 4374 - 4399

Published: Jan. 1, 2024

This review details the design and creation of ultrathin polyamide membranes with significant enhancement in water permeance along limitations potential strategies to empower their efficacy ionic molecular separations.

Language: Английский

---

Polymeric membranes with highly homogenized nanopores for ultrafast water purification

Nature Sustainability, Journal Year: 2024, Volume and Issue: 7(7), P. 901 - 909

Published: May 29, 2024

Language: Английский

---

Bioinspired superwetting oil–water separation strategy: toward the era of openness

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(20), P. 10012 - 10043

Published: Jan. 1, 2024

Bioinspired superwetting oil–water separation strategy is summarized from confined-space to open-space, static dynamic devices. Strategies are evaluated and compared current challenges feasible solutions emphasized.

Language: Английский

---