Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 38 for “"Interfacial polymerization"”.
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Spatially-Directed Interfacial Polymerization
… energy footprint. This thesis introduces In Situ Interfacial Polymerization (ISIP) and Interfacial Photopolymerization (IPP), two room-temperature, interfacial polymerization (IP)-based methods for rapid manufacturing of polymers and their composites. First, In Situ Interfacial Polymerization …
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Applications of room temperature ionic liquids in interfacial polymerization
… with surface nanostructures were synthesized by interfacial polymerization (IP) with ILs without stirring. Both polymers were prepared at the interface between n-hexane and a series of 1 -alkyl-3-methylimidazolium ILs. Nanoporous or nanofibrous polymer morphologies with various sizes ranging from …
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Quantification of interfacial polymerization covalent organic framework membrane physicochemical composition and performance
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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Chemistry at liquid-liquid interfaces: con- and counter-current extraction and biologically active membranes in microchannels
… of membranes within the microchannel via interfacial polymerization. The stability of liquid-liquid interfaces allows for membrane formation via interfacial polymerization. Polyamide membranes are created incorporating amino acid residues. The selection of the amino acid sequence allows …
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Modification of polyamide thin film composite reverse osmosis membrane for water desalination
… osmosis (TFQ-RO) membrane was prepared by the interfacial polymerization of m-phenylenediamine (MPD) and trimesoyl chloride (TMC) monomers on a porous polysulfone support. ZnO-graphene quantum dots (19 nm) were dispersed within the poly amide layer to create the quantum dots composite film. …
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PH-responsive polymeric materials for encapsulation and triggered release
… by weight), free-flowing microcapsules through interfacial polymerization. Through dye release experiments, the triazine-DETA-PDDC microcapsules exhibited a unique pH-dependent release behavior: similarly fast, first order like release profiles at pH 5 and pH 10 and a steady, linear release …
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Interfacial bioorthogonal chemistry for biomaterials synthesis and patterning and development of catalytic method for "turning-on" the tetrazine ligation
… ligation, first example of interfacial crosslinking will be described in Chapter 2. Bioocompatible hyaluronic acid-based hydrogel microspheres and channels were generated in a diffusion controlled fashion. These hydrogels can be covalently tagged with 3D resolution without …
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Understanding the Impact of High Aspect Ratio Nanoparticles on Desalination Membrane Performance
… were incorporated into TFN membranes via interfacial polymerization, and the resulting membranes were characterized using a variety of techniques to establish their performances, but also to gain insight into how the presence of each nanoparticle might be affecting the membrane active …
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Development of Thin-Film Composite Membranes Incorporated With Graphene Oxide and Derivatives for Forward Osmosis Processes
… the effect of GO quantum dots (GQDs) on the interfacial polymerization (IP) reaction and membrane performance at both macroscopic and microscopic levels was investigated both experimentally and using molecular dynamics (MD) simulation. GQDs decreased the IP reaction rate by reducing the …
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Interfacially polymerized thin film composite membranes on microporous polypropylene supports for reverse osmosis desalination
The important technique of interfacial polymerization (IP) is used to fabricate thin film composite (TFC) membranes. In experiments here, microporous polypropylene (PP) flat film membranes were used as a support for fabricating TFC membranes for reverse osmosis by the IP technique. Substantial …
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Divalent metal nanoparticles
… example, taking inspiration from the wellknown interfacial polymerization synthesis of nylon, we place carboxylic acid terminated molecules at the polar defect points and join the newly bifunctional nanoparticles into chains by reacting them with 1,6-diaminohexane through an interfacial reaction.
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ULTRA-LOW K DIELECTRIC MATERIALS WITH HIGH BREAKDOWN STRENGTH AND EXCELLENT MECHANICAL PROPERTIES
… as monomers using liquid-liquid interfacial polymerization and evaluate their dielectric and mechanical properties. The permittivities were measured using LCR, breakdown with PolyK Polarisation Loop & Dielectric Breakdown Test System, and mechanical properties using strain-induced …
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Hypercoiling and hydrophobically associating polymers : interfacial synthesis, surface properties and pharmaceutical applications
… surfactant or plasma apolipoproteins. Stirred interfacial polymerization was used to synthesize potentially biodegradable aromatic polyamides (Mw of 12,000-26,000) based on L-Iysine, L-Iysine ethyl ester, L-ornithine and DL-diaminopropionic acid, by reaction with isophthaloyl chloride. A …
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Microencapsulation of reactive amines and isocyanates and their application to self-healing systems
… microcapsules are synthesized by interfacial polymerization of a polyurea about a droplet of amine by means of suspension polymerization. Capsules are subsequently isolated and analyzed for content, and shown to contain reactive amine. The microcapsules containing reactive amine …
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Development and applications of acid degradable polymeric materials
… The microcapsules are fabricated using interfacial polymerization with trimesoylchloride and a hydroxy acetal-bearing diamine that can undergo degradation in the absence of protic solvent. We demonstrate that by encapsulating a photoacid generator as a trigger, we can increase the …
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Synthesis and characterization of new polycarbonate material systems
… and polycarbonate were synthesized by interfacial polymerization techniques. The Si-aryl bonds of the novel polydimethylsiloxane oligomers were found to impart good thermal and hydrolytiC stability to the random block copolymers. Terminally reactive polycarbonate oligomers were also …
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Synthesis and characterization of polydimethylsiloxane-polyamide segmented copolymers
… or block copolymers were found to be suitable "interfacial" agents. They were synthesized by reacting aminopropyl-terminated polydimethylsiloxane (PDMS) oligomers with sebacyl chloride via an interfacial polymerization in which methylene chloride was used as the solvent or organic phase. A …
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Molecular necklaces: polyester rotaxanes
… polysebacate chains were synthesized by several polymerization approaches including transesterification polymerization, the acid chloride method, and interfacial polymerization. The polyrotaxanes were purified by multiple reprecipitations into good solvents for the crown ethers. In some cases the …
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Scalable Synthesis and Separation Performance of Covalent Organic Framework and Contorted Polyamide Membranes
… are commonly thin film composites (TFC) made via interfacial polymerization. Covalent organic framework (COF) based TFC membranes are a new class of membrane materials ideal for NF applications, and specifically organic solvent nanofiltration (OSN), because of their crystalline, highly porous …
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