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Showing 1 to 19 of 19 for “"Porous polymers"”.
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Protein containing porous polymers for biocatalytic applications
… preparations of a-chymotrypsin. Uniform porous poly(acrylamide) beads were loaded with various quantities of enzyme via an adsorption procedure. Catalytic activity was measured over a wide range of thermodynamic water activities and was found to be similar to the lyophilised preparations. …
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Processing-structure-property relationships of surface porous polymers for orthopaedic applications
The use of polymers in orthopaedics is steadily increasing. In some markets, such as spinal fusion and soft tissue anchors, the polymer polyetheretherketone (PEEK) is already the material of choice in the majority of implants. Despite PEEK’s widespread use, it is often associated with poor …
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Emulsion-Templated Porous Polymers as Support Materials for Covalent Enzyme Immobilization
… the covalent immobilization of enzymes. Highly porous, open-void GMA-based polyHIPE materials were accomplished via the photo- initiation, rather than thermal initiation of the continuous phase of the emulsion. The rapid cure of the emulsion effectively ‘locks’ the emulsion morphology, prior to …
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Surface Functionalised Emulsion- Templated Porous Polymers for In- Vitro Cell Culture
… of the formation of PolyHIPEs creates a highly porous, interconnected monolith structure, the architecture of which can be tightly controlled. Styrene-2-ethylhexylacrylate-divinylbenzene PolyHIPEs with defined architecture of voids between 80 – 100 μm have been previously investigated as …
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A microstructural approach for modelling diffusion of bioactive macromolecules in porous polymers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Harvard-MIT Division of Health Sciences and Technology Program in Medical Engineering and Medical Physics, 1987.
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Synthesis of Metal-Organic Frameworks and Crystalline Porous Polymers and Studies of Their Reactivity
Porous crystalline solids such as metal-organic frameworks (MOFs) and crystalline porous polymers are unparalleled platforms for studying fundamental processes involving gaseous components, which ultimately leads to applications such as catalysis, gas sorption and gas separation. To that end, new …
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Leveraging the Photochemistry of N-Nitrosamines for Their Aqueous Detection, and Development of a Novel Hemi-Iptycene for Porous Polymers
N-Nitrosamines are a class of compounds known for both the potent carcinogenicity of many of its members, and for their widespread occurrence in the human environment. Consequently, the development of methods for their detection is an active area of research. Chapter 1 provides an introduction to …
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Acetylene Functionalized Photocatalytic COFs for PFAS Adsorption and Degradation
… novel synthesis of a series of COFs or amorphous porous organic polymers (APOP) with delocalized π-conjugated systems, followed by characterization and applications. First, we select a few monomers that contain electron-rich structures, such as pyrene and porphyrin groups, as predicted by band gap …
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Post-Synthetic Chemical and Morphological Modifications of Polymer Membranes for Gas Separations
Microporous porous polymers have rigid backbone structures or bulky monomer units that inhibit efficient packing of polymer segments, resulting in high free volume materials with good diffusion selectivity when processed into films. As a result of these characteristics, microporous polymers became …
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Synthesis and Characterization of Highly Porous Borazine-Linked Polymers via Dehydrogenation/Dehydrocoupling of Borane-Amine Adducts and Their Applications to Gas Storage
A new class of porous polymers has been designed and successfully synthesized by thermal dehydrogenation of several polytopic arylamine-borane adducts and has been designated Borazine-Linked Polymers (BLPs). The polymers reported are constructed of linear, triangular, and tetrahedral amine building …
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Micron-scale liquid engineering for porous polymer patterning
Porous polymer structures have a rich history of applications from insulation and impact absorption to superhydrophobic coatings, controlled drug release materials, biological scaffolds and photonic materials. Different approaches such as lithography, etching and direct templating were developed to …
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A Force Sensor Array for Space Applications
… In this work, capacitive sensors based on a porous polymer-ceramic composite structure were evaluated for potential use in future operations within robotic end-effectors, withstanding temperatures ranging from -80 °C to 120 °C and forces up to 350 kPa. A thin-film design is utilized …
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Synthesis and structural stability of metal-organic frameworks
… to use MOFs as template materials to synthesize porous polymers is introduced. Several methods are discussed to grow PMMA into IRMOF-1 (Zn4O(benzene-1,4-dicarboxylate)3, IR stands for isoreticular) structure. High concentration of the monomers resulted in PMMA shell after MOF digestion while with …
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Designed Synthesis of Halogenated Borazine-Linked Polymers and Their Applications in Gas Storage and Separation
The synthesis of highly porous organic polymers with predefined porosity has attracted considerable attention due to their potential in a wide range of applications. Of particular interest in porous organic polymers is their potential use in automotive applications as well as separation processes …
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Meso- und mikroporöse Hochleistungspolymere : Synthese, Analytik und Anwendungen
Die Arbeit beschreibt die Synthese, Charakterisierung und Anwendung von meso- und mikroporösen Hochleistungspolymeren. Im ersten Teil wird die Synthese von mesoporösen Polybenzimidazol (PBI) auf der Basis einer Templatierungsmethode vorgestellt. Auf der Grundlage kommerzieller Monomere und …
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Synthesis and applications of ceramic (silicon carbide and silicon nitride), metallic (cobalt(0)) and polymeric (polyurethane) aerogels
… as efficient desiccants.</p><p>I. Highly porous ( > 80%) monolithic SiC and Si<sub>3</sub>N<sub>4</sub>, aerogels were prepared from compressed compacts of polyurea-crosslinked silica xerogel powders. The process is time efficient as solvent-exchange through powders is fast, and energy …
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Adsorption behavior of volatile organic componds in metal-organic frameworks
… thermal stability. All of the traditional microporous adsorbents which could be effectively applied to gas sampling applications (e.g. zeolites, silica gels, activated carbons, porous polymers) have limitations in one or more of the above criteria and there is an important need for novel …