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Full-Text Articles in Physical Sciences and Mathematics
Effect Of Graphene-Based Fillers On The Properties Of Sunflower-Based Polyurethane, Vishwa Suthar
Effect Of Graphene-Based Fillers On The Properties Of Sunflower-Based Polyurethane, Vishwa Suthar
Electronic Theses & Dissertations
Polyurethane market majorly depends on synthetic materials which are noxious. This stimulated an idea to replace petrochemical resources with renewable resources for polyurethane production. Keeping this in mind, this research focused on the use of sunflower oil for the preparation of polyol and its use in polyurethane composition. The reaction mechanism of epoxidation and ring-opening was approached for the conversion of sunflower oil to polyol. During the conversion of sunflower oil, unsaturated groups of sunflower oil were converted into hydroxyl groups of polyol.
Sunflower oil-based polyol was successfully blended with methylene diphenyl diisocyanate (MDI) to form urethane bonds. Confirmative tests …
Detection Of Nitrogen Dioxide Via Graphene-Enhanced Raman Scattering, Spencer Hazeslip
Detection Of Nitrogen Dioxide Via Graphene-Enhanced Raman Scattering, Spencer Hazeslip
Chemistry & Biochemistry Undergraduate Honors Theses
This paper presents the development of a nitrogen dioxide (NO2) sensor that utilizes the phenomenon of graphene-enhanced Raman scattering (GERS). The sensor consists of monolayer graphene on a silicon wafer, functionalized noncovalently with Copper(II) 2,9,16,23-tetra-tert-butyl-29H,31H-phthalocyanine (CuTTPc) via the solution soaking method. A custom sensing chamber was constructed to enable Raman spectra to be collected during NO2 exposure. The response of the sensor was found to be linear between 10 and 100 ppm NO2, indicating that it could be used for both detection and quantification. Furthermore, the sensor was shown to be reusable after …
Modeling Surface Structures For The Capture Of Carbon Dioxide, Paige Freyre
Modeling Surface Structures For The Capture Of Carbon Dioxide, Paige Freyre
Honors Theses
Our research utilized a modified graphene surface model to simulate capture of carbon dioxide and nitrogen gas based on van der Waals forces and hydrogen bonding. We completed an extensive review of the literature for model and experimental surfaces used to trap carbon dioxide and nitrogen gas into structures and pores with varying functional groups, pore sizes, and pore structures. We replicated the design of selected published models and compared their and our calculated binding energies. We used Scigress (Fujitsu) software with the Molecular Mechanics MM3 parameter set to perform calculations to analyze a proposed graphene surface pore lined with …
Scanning Probe And Spectroscopic Investigations Of Polarization-Driven Electronic Interactions At The Inorganic/Organic Interface Of 2d Materials, Nicholas Hight-Huf
Scanning Probe And Spectroscopic Investigations Of Polarization-Driven Electronic Interactions At The Inorganic/Organic Interface Of 2d Materials, Nicholas Hight-Huf
Doctoral Dissertations
My thesis focuses on understanding the changes in electronic properties of two-dimensional materials produced by surface interactions not limited to charge exchange. Recent work from our group demonstrated that both small molecules and polymers can function as effective charge dopants for monolayered 2D materials such as MoS2 and graphene, changing the Fermi energy by either donating or accepting electron density to/from the 2D material. Additionally, the underlying support material was found to play a significant role, where higher dielectric constant supports result in larger magnitude of Fermi energy shift of the 2D material because less of the dopant interaction …