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Showing 1 to 20 of 158 for “"microporous"”.
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Robust Microporous Metalloporphyrin Framework Solids
The manganese porphyrin framework, PIZA-5, has been shown to catalyze the hydroxylation of cycloalkanes under liquid-solid conditions, using iodosylbenzene as oxidant. This framework is novel as the catalysis occurs in its pores. No other porphyrin framework solids where catalysis occurs in the …
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Designing Microporous Polymers for Separations
In Chapter 1, we investigate the influence of side-chain length and dispersity in ring-opening metathesis polymerization (ROMP) polymers with pore-generating side chains. Macromonomers with four discrete monodispersities are separated and polymerized to produce bottlebrush polymers with …
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Liquid flow throuigh microporous vycor.
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1973.
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Microporous polymeric membranes via melt processing
Novel ultraporous and microporous membranes from immiscible polymer blends were produced via melt processing and post-extrusion treatments. Polystyrene (PS)/polypropylene (PP) and poly(ethylene terephthalate) (PET)/polypropylene (PP) blend systems with different rheological properties were studied. …
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Hydrogen sorption in palladium doped microporous materials
This research investigated “hydrogen spillover” which has been suggested to improve the hydrogen uptake of bridged and chemically doped porous materials at room temperatures. XRD, Temperature Programmed Desorption and hydrogen sorption measurements were used to characterise the as-received and …
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Analytical Chemiluminescence in Microporous Membrane Flow Cells
Microporous membrane chemiluminescence (CL) flow cells are presented as an advantageous method for chemical reagent and analyte mixing in continuous flow. The method adds simplicity, significant reagent economy and minimal sample contamination to the conventional advantages of analytical CL …
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Application of Microporous Membranes to Chemiluminescence Analysis
… into flowing streams is accomplished using a microporous membrane to separate a reagent reservoir from an analyte stream. Evidence is presented to support the contention that upon pressurization of the reagent reservoir a locally high concentration of reagents is established near the surface …
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Microporous materials fabricated from discrete molecular cages
In the context of materials science, an interesting relationship exists between the properties of solid materials and the existence of void spaces within them. In fact, whether the presence of voids is desired or not tends to depend on one’s perception of the effects that voids induce. In densified …
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Inclusion of Molybdenum into microporous and mesoporous materials
… The supports were zeolite Y types, large microporous cloverite, and mesoporous MCM-41. The large pore supports were used to produce catalysts that can accommodate catalysis reactions involving large molecules. The objective of this work is to study the preparation and characterisation of …
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Novel polypropylene based microporous membranes via spherulitic deformation
A novel method for creating a microporous polypropylene membrane via spherulitic deformation is described. The microporous structure was generated by the combination of intra-spherulitic and inter-spherulitic deformations. Polypropylene was selected due to its unique cross-hatched lamellar …
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Dynamics of fouling of microporous membranes by proteins
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemical Engineering, 1990
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The flow of aqueous humor in microporous materials
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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Microporous Organically Pillared Layered Silicates (MOPS) with tunable Functionality
… anpassbaren Hybridmaterialien, sogenannte „Microporous Organically Pillared Layered Silicates“ (MOPS), die Klasse der mikroporösen Materialien. Die Bezeichnung „Pillared Interlayered Clays (PILCs)“ wird in der Literatur leider nicht nur für tatsächlich gepillarte, mikroporöse Materialien …
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NMR Techniques for Measuring Transport Phenomena in Microporous Materials
… molecules adsorbed in industrially relevant microporous zeolite materials using Pulsed Field Gradient Nuclear Magnetic Resonance (PFG NMR). The main body of this work involves the use of weakly adsorbing hydrocarbon gases (CH4, C2H6 and C3H¬8) adsorbed in a large pore β-zeolite structure. …
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Design of a microcomputer-based microporous membrane process controller
A microcomputer-based process controller has been developed to produce porous membrane material. The production process is based on stretching the material in a constant temperature solvent bath. This thesis describes the hardware and software designed to direct and monitor the process. A VIC 20 is …
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Multinuclear Solid-State Nuclear Magnetic Resonance Spectroscopy of Microporous Materials
Microporous materials have attracted tremendous attention since 18th century due to their industrial importance. It is essential to understand the relationships between the properties of microporous materials and their structures. However, the structures of many microporous materials are determined …
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Chemiluminescent Determinations of Clinical Analytes Using Microporous Membrane Flow Cells
… years. This thesis project presented the use of microporous membrane flow cells for the chemiluminescent determinations of some of these species using flow injection analysis as an advantageous alternative to more classical methods of detection. The compounds studied were glucose, glactose, …
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Microporous Polymer-Metal Organic Framework (MOF) Hybrid Materials for Separations
… in the chemical industry. Recent advancements in microporous materials, such as polymers of intrinsic microporosity (PIMs) and metal-organic frameworks (MOFs), have demonstrated performance improvements over conventional polymers. Mixed-matrix membranes (MMMs) have emerged as a potent strategy, …
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