A5046127290- Membrane Separation and Gas Transport
- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Membrane Separation Technologies
- Zeolite Catalysis and Synthesis
- Catalytic Processes in Materials Science
- Graphene research and applications
- Advanced Sensor and Energy Harvesting Materials
- Advanced Battery Materials and Technologies
- Ionic liquids properties and applications
- Catalysts for Methane Reforming
- Polymer Surface Interaction Studies
- Synthesis and properties of polymers
- Extraction and Separation Processes
- Gas Sensing Nanomaterials and Sensors
- Muon and positron interactions and applications
- Ammonia Synthesis and Nitrogen Reduction
- Chemical Synthesis and Characterization
- Boron and Carbon Nanomaterials Research
- Fuel Cells and Related Materials
- Advanced Polymer Synthesis and Characterization
- Advanced Photocatalysis Techniques
- Carbon Dioxide Capture Technologies
- Magnetism in coordination complexes
- Membrane-based Ion Separation Techniques
Freeport-McMoRan (United States)
2021-2024
Dow Chemical (United States)
2021-2024
National Energy Technology Laboratory
2013-2021
Defense Logistics Agency
2021
Leidos (United States)
2020
AECOM (China)
2016-2018
United States Department of Energy
2016
University Research Co (United States)
2015
West Virginia University
2014-2015
Morgantown High School
2015
ZIF-8 membranes, a type of zeolite imidazolate framework, were synthesized by secondary seeded growth on tubular α-Al2O3 porous supports. The presence small, highly crystalline, microporous crystals with narrow particle size distribution led to continuous thin membranes. novel membranes displayed unprecedented high CO2 permeances and relatively separation indexes for equimolar mixtures CH4.
We report the structural evolution of zeolitic imidazolate framework-8 (ZIF-8) as a function time at room temperature. have identified different stages ZIF-8 formation (nucleation, crystallization, growth, and stationary periods) elucidated its kinetics transformation. hypothesize that observed semicrystalline-to-crystalline transformation may take place via solution- solid-mediated mechanisms, suggested by phase Avrami's kinetics, respectively. A fundamental understanding demonstrated in...
MOF particles are surface-functionalized to achieve an improved polymer–particle interaction in mixed matrix membranes. Compared the neat polymer, membranes have 3 times higher CO<sub>2</sub> permeability with ~25% improvement CO<sub>2</sub>/N<sub>2</sub> selectivity.
SAPO-34 seeds and membranes were functionalized with several organic amino cations, such as ethylenediamine, hexylamine, octylamine. The successful incorporation of the groups in framework was confirmed by Fourier transform infrared (FTIR) X-ray photoemission (XPS) spectroscopies. resultant evaluated for separation CO2/CH4 CO2/N2 gas mixtures. selectivities high 245, CO2 permeances ∼5 × 10−7 mol m−2 s−1 Pa−1 at 295K 138 kPa, observed an optimum ethylenediamine-functionalized membrane, which...
We followed the crystallization-time dependence of zeolitic imidazolate framework, ZIF-8. Interestingly, when zinc carbonate basic was used as metal source, coexistance ZIF-8 and ZnO nanoneedles observed. Long synthesis times promoted complete crystallization The kinetics transformation is governed by Avrami's classic model.
Membranes with high water permeance, near-zero rejection to inorganic salts (such as NaCl and Na2SO4), almost 100% organic dyes are of great interest for the dye desalination (the separation salts) textile wastewater. Herein, we prepared reduced graphene oxide membranes in a solvation state (S-rGO) nanochannel sizes rightly between salt ions molecules. The S-rGO membrane rejects >99.0% Direct Red 80 (DR 80) has zero Na2SO4. By contrast, conventional GO or rGO often have channel smaller than...
Metal organic framework (MOF)/polymer composite membranes are of interest for gas separations, as they often have performance that exceeds the neat polymer. However, traditional membranes, known mixed matrix (MMMs), can complex and time-consuming preparation procedures. The MOF polymer traditionally prepared separately require priming mixing to ensure uniform distribution particles compatibility polymer–particle interface. In this study, we reduce number steps using an in situ growth...
We have utilized an environmentally friendly synthesis approach for the accelerated growth of a selective inorganic membrane on polymeric hollow fiber support postcombustion carbon capture. Specifically, continuous defect-free ZIF-8 thin films were grown and anchored using flow outer surface porous supports water as solvent. These membranes demonstrated CO2 permeance 22 GPU highest reported CO2/N2 selectivity 52 synthesized membrane.
Zwitterionic materials have been widely used to modify membrane surfaces increase surface hydrophilicity and mitigate fouling, which would otherwise decrease water permeance. However, zwitterionic are water-soluble, it is challenging graft or coat zwitterions for long-term underwater operation. In this work, we demonstrate a facile two-step coating of using novel copolymer that contains thiol groups, achieved bioadhesive polydopamine (PDA) as the intermediate layer. The copolymers were...
In the next decade, separation science will be an important research topic in addressing complex challenges like reducing carbon footprint, lowering energy cost, and making industrial processes simpler. chemical processes, particularly petrochemical operations, product refining steps are responsible for up to 30% of use capital cost. Membranes adsorption technologies being actively studied as alternative partial replacement opportunities state-of-the-art cryogenic distillation systems. This...
Nanoporous silica membranes exhibit excellent H2/CO2 separation properties for sustainable H2 production and CO2 capture but are prepared via complicated thermal processes above 400 °C, which prevent their scalable at a low cost. Here, we demonstrate the rapid fabrication (within 2 min) of ultrathin silica-like (∼3 nm) an oxygen plasma treatment polydimethylsiloxane-based thin-film composite 20 °C. The resulting organosilica unexpectedly permeance 280-930 GPU (1 = 3.347 × 10-10 mol m-2 s-1...
Polymeric membranes for wastewater reuse are often fouled by suspended solids and dissolved organic matters, resulting in a dramatic decrease water flux. Fouling can be mitigated enhancing hydrophilicity of the membrane surface to avoid favorable interactions between foulants. However, modification is complicated difficult integrate into industrial production processes. Herein we demonstrate facile one-step coating superhydrophilic zwitterions on ultrafiltration (UF) codepositing dopamine...
This study presents the fabrication of a new mixed matrix membrane using two microporous polymers: polymer intrinsic microporosity PIM-1 and benzimidazole linked polymer, BILP-101, their CO2 separation properties from post-combustion flue gas. 17, 30 40 wt% loadings BILP-101 into were tested, resulting in mechanically stable films showing very good interfacial interaction due to inherent H-bonding capability constituent materials. Gas transport studies showed that BILP-101/PIM-1 membranes...
Most examples of mixed-matrix membranes (MMMs) involve one type polymer and inorganic filler particle. Here, both blending MMM approaches are combined to form exceptional three-component for CO2/N2 separation. Nano-sized amino-functionalized UiO-66 is added a blend PIM-1 an ether side chain functionalized polyphosphazene (MEEP80) create series MMMs. Incorporation UiO-66-NH2 particles boosts the CO2 permeability PIM-1/MEEP80 (75:25) from 3140 up nearly 6000 Barrer, while maintaining its...
A robust and orthogonal approach to access modular block-copolymer poly(ionic liquid)s.
PIM-1 based blend membranes with advanced gas transport and mechanical properties.
SAPO-34 zeolite displaying ∼0.5 µm crystal size with a narrow particle distribution and preferential adsorption of CO2 over that CH4 was prepared via phase transformation SAPO-5 under microwave heating.
Thiol–ene chemistry draws much attention nowadays in the construction of functional polymer materials due to its versatility and fast reaction kinetics, though only a few studies have been reported on utilization fabrication elastic materials. Herein, series elastic, poly(dimethylsiloxane)–poly(ethylene glycol) methyl ether acrylate (PDMS–PEGMEA)-based co-polymer membranes are synthesized via one-pot thiol–ene reaction. These highly stable exhibit tunable thermal/mechanical properties by...
ABSTRACT Homogenous amphiphilic crosslinked polymer films comprising of poly(ethylene oxide) and polysiloxane were synthesized utilizing thiol‐ene “ click ” photochemistry. A systematic variation in composition was Carried out to obtain high quality with varied amount siloxane oxide). These showed improved gas separation performance permeabilities good CO 2 /N selectivity. Furthermore, the resulting also tested for its biocompatibility, as a carrier media which allow human adult mesenchymal...