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- Polyurethane (9)
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Articles 31 - 40 of 40
Full-Text Articles in Physical Sciences and Mathematics
Graphene Nanoribbons And Their Polymeric Nanocomposites: Controlled Synthesis, Characterization And Applications, Nada M. Aljehany
Graphene Nanoribbons And Their Polymeric Nanocomposites: Controlled Synthesis, Characterization And Applications, Nada M. Aljehany
Electronic Theses & Dissertations
Carbon based materials are very promising as electrode materials energy generation and storage devices. They have been used for fuel cells, supercapacitors and solar cells. Among the carbon-based materials, graphene is very attractive due to its unique properties such as high electrical conductivity, good mechanical flexibility, large theoretical surface area (2630 m2/g), and high thermal and chemical stability. These unique properties make them very suitable for energy storage applications particularly for supercapacitors. The performance of the graphene as energy storage material could be further improved by growing them in nanoribbon form by unzipping carbon nanotubes. In this thesis, …
Use Of Decahydrodecaborate As Flame Retardants In Polyurethanes, Austin W. Bailey
Use Of Decahydrodecaborate As Flame Retardants In Polyurethanes, Austin W. Bailey
Electronic Theses & Dissertations
There is a growing need for non-halogenated flame retardants due to the toxicity and environmental impacts that are exhibited by current ones. The polyurethane industry is one that has expressed a need for flame retardants in many of its industrial and commercial applications. For these reasons, two different decaborate compounds, tetramethyl and tetrabutyl ammonium decahydrodecaborate, were synthesized and incorporated into polyurethane films for testing. The compounds were characterized using Fourier Transform Infrared (FT-IR) spectroscopy, Proton-Nuclear Magnetic Resonance (1H-NMR) spectroscopy, Carbon-Nuclear Magnetic Resonance (13C-NMR) spectroscopy, and Boron-Nuclear Magnetic Resonance (11B-NMR) spectroscopy. The compounds were incorporated …
Effects Of Processing Parameters On Properties Of Novel Silica-Filled Polysiloxane Materials, Kyle W. Schwenker
Effects Of Processing Parameters On Properties Of Novel Silica-Filled Polysiloxane Materials, Kyle W. Schwenker
Electronic Theses & Dissertations
Polysiloxanes are a class of materials that possess high temperature stability and the ability to remain flexible at extremely low temperatures. Their elastomers generally exhibit low strength and have poor mechanical properties unless reinforced with fillers. Reinforcement can be accomplished by compounding reinforcing silica fillers with polysiloxanes via twin-screw extrusion compounding that vigorously mixes the fillers into a polymer matrix. In this thesis, a lab-scale twin-screw extruder was utilized to compound thermoplastic materials to determine the effects of processing on thermoplastics material properties, as well as to determine the extruder’s compounding effectiveness. Processing via lab-scale twin-screw extrusion did not negatively …
Use Of Decahydrodecaborate As Flame Retardants In Coatings, Austin Bailey
Use Of Decahydrodecaborate As Flame Retardants In Coatings, Austin Bailey
Paper and Posters Presentations
As the need to protect the environment continues to increase, there is a growing demand for non-halogenated flame retardants. Two different decaborate compounds were combined with triphenylphosphine oxide into polyurethane and characterized. The thermal stability and the potential flame retardancy of the new materials were tested via thermogravimetric analysis and cone calorimetry. The cone test provided heat release rates and smoke release rates. Per the results of these tests the combination of the new decaborate, and triphenylphosphine oxide showed potential for flame retardancy at minimal amounts of flame retardant.
High Performance Supercapacitor Device Based On Polymer Derived Carbon Nanofiber With Enhanced Capacity At Elevated Temperatures, Charith Ranaweera
High Performance Supercapacitor Device Based On Polymer Derived Carbon Nanofiber With Enhanced Capacity At Elevated Temperatures, Charith Ranaweera
Paper and Posters Presentations
Recently, supercapacitors are attracting considerable interest as a promising energy storage device. In this study, we report the high performing supercapacitor based on cobalt oxide embedded carbon nanofibers (CNF@CO) fabricated by electrospinning of cobalt acetate and polyacrylonitrile mixture in to carbon nanofibers (CNF) and subsequent pyrolyzed at 800 oC under nitrogen atmosphere. Morphology and electrochemical properties of the fabricated CNF@CO was studied in detailed. Embedding of cobalt oxide in to CNF showed a remarkable improvement in the charge storage capacitance, specific capacitance of 360 F/g and 1100 F/g were observed for CNF and CNF@CO, respectively. We studied the effect of …
High-Quality Polyurethane Foams And Sheets From Sustainable Natural Resources, Sanket Bhoyate, Chungyang Zhang, Mihail Ionescu
High-Quality Polyurethane Foams And Sheets From Sustainable Natural Resources, Sanket Bhoyate, Chungyang Zhang, Mihail Ionescu
Paper and Posters Presentations
Bio-polymers from sustainable natural resources serve mankind keeping environmental factors under consideration. Resources such as soybean, castor and orange oil are among highly cultivable agro-resources. Polyols formulated from these oils shows clean-environmental pathway for synthesizing polyurethane foams and sheets. Facile single-step synthesis, with negligible waste as well as byproducts produces 100% qualitative yield for polyurethane foams. Present work displays use of synthesized polyols in developing polyurethane foams and casts. Viscometry, FTIR spectroscopy, GPC and other chemical analysis were done to ensure the quality of the raw materials. Cast Sheets and foams were produced by chemical polymerization with di-phenyl methane diisocyanate …
Combination Therapy Of Prostate Cancer Utilizing Functionalized Iron Oxide Nanoparticles Carrying Tnf-A And Lactonic Sophorolipids, James Beach, Tuhina Banerjee, Jyothi Kallu, Ryan Higginbotham, Richard Gross
Combination Therapy Of Prostate Cancer Utilizing Functionalized Iron Oxide Nanoparticles Carrying Tnf-A And Lactonic Sophorolipids, James Beach, Tuhina Banerjee, Jyothi Kallu, Ryan Higginbotham, Richard Gross
Paper and Posters Presentations
Prostate cancer is one of the most prevalent forms of cancer afflicting men in the United States. In recent years, advances in the field of nanotechnology have allowed for new and innovative ways to treat various types of cancer and various other diseases. Our research focuses on the treatment of the LNCaP line prostate cancer utilizing iron oxide nanoparticles (IONPs) loaded with soluble TNF-a and lactonic sophorolipids (LSLs). TNF-a is a cytokine responsible for apoptosis initiation, while LSLs are naturally-glycolipids shown to alleviate inflammation and improve immune response in certain diseases. We hypothesized that this combination may possess a synergistic …
Moleculary Targeted Nanomedicine: Role Of Hsp90 Inhibitor And Sophorolipids, Shuguftha Naz
Moleculary Targeted Nanomedicine: Role Of Hsp90 Inhibitor And Sophorolipids, Shuguftha Naz
Paper and Posters Presentations
Oncogenic K-RAS, one of the major histologic subtypes of Non-Small-Cell Lung Cancer (NSCLC) accounts for 25% of the lung cancer related deaths. Hsp90, a ubiquitously expressed molecular chaperone is considered to be a promising target for therapeutic intervention. It is known to interact with several client proteins that are important in the pathogenesis of the cancer. Ganetespib, an Hsp90 inhibitor has been shown to have superior anti-tumor activity in several K-RAS mutant NSCLC cell lines. In addition, lactonic sophorolipids (LSL), a class of chemo-enzymatically modified glycolipids, are known to be promising immunomodulators and have shown to decrease the mortality rate …
High Performance Carbon Nanofiber Supercapacitor Electrode With Tuned Porous Structure, Sanket Bhoyate
High Performance Carbon Nanofiber Supercapacitor Electrode With Tuned Porous Structure, Sanket Bhoyate
Paper and Posters Presentations
High performance capacitor devices based on electric double layer capacitor (EDLC) principle has wide advantage of higher range of cyclic stability, rate capability, temperature durability and chemically resistant. Carbon based materials such as graphene, carbon nanotubes, activated carbon and carbon nanofibers are well known supercapacitor materials derived till date. Creating pores within the physical structure has found to improve the EDLC capabilities of the material. Exfoliation of graphene, activation of carbon and activation of nanofibers via various different techniques seem to be too complicated, non-consistent and needs wide range of control parameters. Facile immiscible polymer blend technique followed by thermal …
Novel Non-Halogenated Flame Retardant Compounds, Austin Bailey, Charles J. Neef, Time Dawsey
Novel Non-Halogenated Flame Retardant Compounds, Austin Bailey, Charles J. Neef, Time Dawsey
Poster Presentations
Two different boron compounds, bis(tetramethylammonium) decaborate, TMAD, and bis (tetrabutylammonium) decaborate, TBAD were studied as potential replacements for halogenated flame retardants. Current commercially available, halogenated flame retardants are not environmentally friendly and release strong acids upon burning. TMAD and TBAD were combined with triphenylphosphine oxide and cast in polyurethane films at varying levels. These samples were then cut into strips and burned in a UL-94 flame chamber. These samples were also tested via TGA for degradation temperature. These varying levels were tested via several Design of Experiments constructed within Minitab software. Results thus far have shown the potential for these …