A5066297355- Membrane Separation and Gas Transport
- Covalent Organic Framework Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Membrane Separation Technologies
- Fuel Cells and Related Materials
- Pharmaceutical and Antibiotic Environmental Impacts
- Advanced oxidation water treatment
- Per- and polyfluoroalkyl substances research
- High voltage insulation and dielectric phenomena
Massachusetts Institute of Technology
2022-2025
Integrating different modification strategies into a single step to achieve the desired properties of metal-organic frameworks (MOFs) has been very synthetically challenging, especially in developing advanced MOF/polymer mixed matrix membranes (MMMs). Herein, we report polymer-MOF (polyMOF) system constructed from carboxylated polymer with intrinsic microporosity (cPIM-1) ligand. This intrinsically microporous ligand could coordinate metals, leading ~100 nm-sized polyMOF nanoparticles....
Fine-tuning microporosity in polymers with a scalable method has great potential for energy-efficient molecular separations. Here, we report dual-phase engineering approach to prepare microporous polymer nanofilms through interfacial polymerization. By integrating two micropore-generating units such as water-soluble Tröger's base diamine (TBD) and contorted spirobifluorene (SBF) motif, the resultant TBD-SBF polyamide shows an unprecedentedly high surface area. An ultrathin membrane (~20 nm)...
Poor interfacial compatibility remains a pressing challenge in the fabrication of high-performance polymer-MOF composites. In response, introducing compatible chemistries such as carboxylic acid moiety has emerged compelling strategy to increase interactions. this work, we leveraged functionalities UiO-66-NH2 and acid-functionalized PIM-1 fabricate mixed-matrix membranes (MMMs) with improved separation performance compared PIM-1-based MMMs industrially relevant conditions. Under pure-gas...
H 2 S/CH 4 and CO /CH separations show opposing trends, making simultaneous improvement challenging. This is addressed by increasing free volume to enhance competitive sorption effects boosting diffusion selectivity through in situ crosslinking.
Solution-processable polymers of intrinsic microporosity (PIMs) have been explored as a next-generation material for the synthesis CO2 capture membranes. Herein, we highlight critical need understanding transition from bulk PIM materials (50–150 μm) to their thin films (<3 μm). 6FDA-DAM and PIM-1 were chosen archetypal PIMs, thin-film composite (TFC) membranes prepared via spin-coating method. Interestingly, PIM-based TFC always exhibited lower gas permeabilities compared model predictions...
Membranes for gas separations are limited by the trade-off relationship between permeability and selectivity. In this study, we demonstrate an in situ thermal oxidative crosslinking strategy amine-functionalized polymers using tert-butoxycarbonyl (tBOC) groups to improve separation performance. The use of labile tBOC offers two major benefits inducing crosslinks: (1) they trigger free radical chain reactions at more moderate temperatures, preventing polymer backbone degradation pathways that...
Abstract Persistent organic pollutants (POPs), including xenoestrogens and polyfluoroalkyl substances (PFAS), demand urgent global intervention. Fenton oxidation, catalyzed by iron ions, offers a cost‐effective means to degrade POPs. However, numerous challenges like acid dependency, catalyst loss, toxic waste generation hinder practical application. Efforts create long‐lasting heterogeneous catalysts, capable of simultaneously eliminating requirements, sustaining rapid kinetics, retaining...
<title>Abstract</title> Metal–Organic Frameworks (MOFs) hold significant potential for various applications in gas, liquid, and ion separations. However, while MOF-based nanocomposite research is growing, facet-specific studies on molecular transport are rare. Here, a pioneering investigation into gas nanocomposites was conducted using ZIF-8, with exposed {110} or {100} facets interacting polyimide. Despite their otherwise near-identical properties, the higher energy facet showed more...