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 59 for “"polymer coating"”.
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Removal of polymer coating with supercritical carbon dioxide
… carbon dioxide in particular, for the removal of polymer coatings. Research into new supercritical fluid applications is nearly always based on a trial and error approach, and frequently requires evaluating each operation on a case-by-case basis. A significant improvement in this approach is …
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One pot synthesis of metal, carbides and polymeric aerogels
… the role of the template for the accumulation of polymer that connects covalently and crosslinks the nanoparticles. The resulting materials can be 300x stronger than the native network, for a nominal increase in density by a factor of 3x. Since the exceptional mechanical properties of X-aerogels …
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Antibacterial calcite created with a multilayer polyelectrolyte coating method
… Polycationic natural and synthetic polymers have been shown to interact electrostatically with bacteria and kill them. Thus, single calcite crystals and the mineral particles are coated with selected polyelectrolytes. A multilayer approach is employed to increase the coverage of the …
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Finite element based micromechanical modeling of periodic composite microstructures
… with a fixed strut length, the proportion of the polymer coating to the elastomer core used in the composite struts (coating fraction), and the size of the representative volume element (layer number). An analytical model based on energy methods for buckling columns with elastic restraints was …
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A study of chlorinated polymer coatings in a fretting interface
… this study is to determine whether chlorinated polymers such as polyvinylchloride (PVC) and polyvinylidenechloride (PVDC) degrade in a fretting interface. Polymer coated 52100 steel balls are fretted against a polished 1045 steel plate for 30 minutes in air and nitrogen at 25-30 percent and …
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Fundamental and Applied Aspects of Electronics Based on Single -Walled Carbon Nanotube Thin Films
… devices have been achieved by use of simple polymer coating strategies. Complex digital circuits composed of nearly 100 SWNT TFTs have also been successfully demonstrated. Finally, we demonstrated certain classes of optically transparent devices using SWNT films as electrically active …
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UWB antenna using indium tin oxide (ITO)
… AgHT characteristics as well as the PET (plastic polymer) coating. All those parametric studies are conducted and simulated using CST Microwave Studio. The reflection coefficient, radiation pattern, VSWR and gain values were compared and contrast between the two antennas. It can be concluded that …
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Purification of recombinant proteins with magnetic nanoclusters
… are easily recovered. Cluster size depends on polymer molecular weight and hydrophobicity as well as the amount of polymer present at nucleation. When a polymer coating with optimal molecular weight is used in limited amounts, clusters are formed. When the clusters are subsequently coated with …
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Effect of Quantum Dots, Novel Biological Imaging Agents, in Liver Cells in Vitro
The use of Quantum dots (QDs) coated with polymer and functionalized with carboxylic acid groups in medical applications are explored. Their water solubility and exceptional stability in aqueous environments make them potentially useful for such applications as imaging and ligand attachments. …
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Nonaqueous Synthesis of Metal Oxide Nanoparticles and Their Surface Coating
… as the core with silica, titania or polymer as shell via a modified microemulsion approach. In the first part, the experimental procedures and characterization results of successful synthesis of crystalline iron oxide (Fe3O4) and indium oxide (In2O3) nanoparticles are reported. Those …
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Microvascular Networks for Continuous Self -Healing Materials
… of crack damage in a given location. Re-mendable polymers have demonstrated crack mending for multiple cycles, but only with heat treatment and applied pressure. We demonstrate, for the first time, the autonomic characteristics of microencapsulated systems with the ability to heal repeated damage …
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Theoretical Modeling of Polymeric and Biological Nanostructured Materials
Polymer coatings on periodic nanostructures have facilitated advanced applications in various fields. The performance of these structures is intimately linked to their nanoscale characteristics. Smart polymer coatings responsive to environmental stimuli such as temperature, pH level, and ionic …
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Inkjet printing of resistive-type humidity sensor for harsh environments
… (PANi) as humidity sensitive material. A copolymer of ethylene and vinyl alcohol (EVOH) is used as sensor protective coating. Double strand water- soluble PANi ink is synthesized by polymerization of aniline monomers with poly(4- styrenesulfonic acid) (PSSA) as a template. Manufactured …
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STRAIN AND TEMPERATURE MEASUREMENT FROM DISTRIBUTED FIBER OPTIC SENSORS IN PERFORMANCE-BASED FIRE ENGINEERING
… load protocol and characterize the effect of polymer coating on the sensors as the polymer softens and melts at elevated temperatures. The second part aims to quantify the effectiveness and limitation of distributed fiber optic sensors without coatings for measuring temperature and strain of a …
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Probing cellular protein complexes using single-molecule pull-down
… The flow chambers are passivated using a polymer coating such that the cellular components do not bind, and the immobilized antibody specifically captures the target protein. Cell lysates are diluted to obtain isolated molecules suitable for single-molecule imaging. The target molecules …
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Non-viral drug delivery systems for immune modulation
Biodegradable polymer particles have diverse applications in drug delivery. The main objective of this thesis was to apply these delivery systems to modulating the immune system. We optimized particle formulations for the delivery of three novel immune modulating compounds, small inhibiting RNA, …
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Tensile and interfacial properties of radially aligned CNT grown carbon fibers
… interfacial shear strength (IFSS) for sized (polymer coating on fibers) fuzzy fibers, attributed to thermally induced sizing transformations during CNT growth, whereas the fuzzy de-sized fibers exhibited no reduction in IFSS. The CFD model demonstrated gas depletion trends correlated to the …
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Development and evaluation of oral solid dosage forms for colonic delivery of drugs for the treatment of cystinosis.
… varying the type and concentration of the polymer used as an extrusion aid in the formulation. Classes of polymeric materials tested include starches, natural gums and cellulose derivatives. The study evaluated the properties of each wet mass formulation, extrudate and spheronisation …
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Aerogels and films through free radical polymerization
… building blocks of silica aerogels with polymers. To streamline the crosslinking process we synthesized a bidentate free radical initiator (Si-AIBN) that gets attached on the skeletal nanoparticles and induces crosslinking by surface initiated polymerization (SIP). Here, we extend the …
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Surface functionalisation techniques for colloidal inorganic nanocrystals
… hydrophobic interaction between an amphiphilic polymer and nanocrystal ligands to provide a foundation for growth of a silica layer. The coated nanocrystals are characterised using a wide range of techniques confirming that the presence and location of the silica shell. In Chapter 4, …
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