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Showing 1 to 20 of 197 for “"silane"”.
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Zweifach Eisen-substituierte Silane, Silanole und Siloxane
… der Darstellung Übergangsmetall-substitutierter Silane und Untersuchungen zum Einfluss verschiedener Übergangsmetallsubstituenten auf die chemischen und spektroskopischen Eigenschaften dieser Klasse von Siliciumverbindungen. Dabei steht insbesondere die Synthese mehrfach metallierter Silanole und …
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Ferriomethyl- und Wolframiomethyl-substituierte Silane, Silanole und Siloxane
… Et3N-assistierte Hydrolyse von Ferriomethyl-chlorsilanen bzw. Oxygenierung von Si-H-funktionellen Ferriomethyl-silanen mit Dimethyldioxiran dargestellt. Die Stabilisierung durch das Metallfragment in β-Stellung zur Silanoleinheit erweist sich ebenfalls hinreichend für die Darstellung von …
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INELASTIC ELECTRON TUNNELLING SPECTROSCOPY (lETS) OF SILANE COUPLING AGENTS
… (lETS) has been used to study monolayers of silane coupling agents adsorbed on aluminium oxide. The technique of lETS is surface specific and uses electrons to excite vibrational modes of the adsorbate. Since the tunnelling electrons perturb both the dipole moments and polarizability …
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Silane Surface Modification of Boron Carbide in Epoxy Composites
… mechanical strength and durability. Hence, silane surface modification of BC particles was conducted with γ–glycidoxypropyltrimethoxysilane (GPS) as an aqueous solution to attain an 80%wt BC-epoxy PMC with improved strength and durability. Surface analysis on BC, and physical-chemical …
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Processing and Properties of Hybrid Silane-Epoxy Nanocomposite Coatings
… was also improved by using a combination of silanes (amino silane and epoxy silane). The chemical reactions between various entities were investigated by fourier transform infrared spectroscopy and the changes in physical and mechanical properties were studied by a dynamic mechanical …
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Durability of Silane Sealer in a Highly Alkaline Environment
… expansion is to use a penetrating sealer such as silane. A set of columns located in a food preparation facility was treated with silane and a complimentary laboratory study was performed. A cleaning regimen involving application of an alkaline cleaner is employed at the facility, followed by …
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Lithiosilane und (Lithiomethyl)silane mit stereogenen Silicium-Zentren: Synthesen und stereochemische Reaktionsverläufe
Die Arbeit liefert einen Beitrag zum Themengebiet der Silyllithium- und Alkyllithium-Verbindungen – im Speziellen der Benzyllithium-Verbindungen. Im Mittelpunkt der Betrachtungen standen hierbei die Untersuchung der Reaktivität, die Bestimmung von Selektivitäten und die Untersuchung des …
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Self-Structuring of functionalized micro- and mesoporous organosilicas using boron-silane-precursors
… context a new precursor concept based on boron-silanes is presented. These precursors combine the properties of a structure directing group and a silica source by covalent borane linkage. Formation of the precursor is easily realized by a sequential two-step hydroboration, firstly on …
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The formation of reaction bonded silicon nitride from silane derived silicon powders
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1989.
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Auf dem Wege zu einem Disilin RSi≡SiR Supersilylierte Silane, Silanide, Silylene, Disilene
… Struktur und Enthalogenierung von Monosupersilylsilanen; Disilene, Cyclosilane, tetrahedro -Silane Die als Vorstufen sperrig substituierter Disilane R*X2Si–SiX2R*, Disilene R*XSi=SiXR* und Disiline R*Si≡SiR* wichtigen Monosupersilylsilane R*SiX3 (R* = SitBu3 = Supersilyl; X = H, F, Cl, Br, I, Me, …
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Elucidation of the structure of silane coupling agent films formed on metal surface
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1979.
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Vibrational Spectroscopy and Atomic Force Microscopy Studies of Silane Adsorption onto Silicon and Glass.
… of two surfactants, n-octadecyltrichlorosilane and perfluorodecyl(ethyl)trichlorosilane, onto silica surfaces, was investigated by Fourier transform infrared attenuated total reflection, (FTIR-ATR), spectroscopy and by atomic force microscopy, (AFM). The rate of formation of the …
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Investigation of an alternative sulfonated silane in ceramic carbon electrodes for fuel cell applications
… with a more ion conductive sulfonated organosilane monomer component. TPS was replaced with 4-(2-(trihydroxysilyl)ethyl) benzenesulfonic acid (TEBS) and mixed with TEOS and compared to the previous TPS/TEOS system as well as the traditional Nafion ionomer electrode. The sulfonated CCEs were …
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Influence of Silane Penetrating Sealer on Deicer Scaling and Absorption of Concrete Highway Pavement
… equipment, and their performance after applying silane to the surface. In total 30 samples with and without silane coating were taken into consideration. Wisconsin limestone and granite were the two types of aggregates considered and one field section consisting of two distinct mix design were …
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A study of antimicrobial properties of fabric treated with silane and N-halamine complex
… hydantoin (DMH) – Isocyanatopropyltriethoxysilane adduct was prepared and applied onto the fabric using pad – dry – pad – dry – cure method. The treated fabric is then chlorinated using NaOCl (6% and 10%) to impart the antimicrobial properties. The treated fabric surface and the chlorine …
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Measurement of the Electron Density and the Attachment Rate Coefficient in Silane/helium Discharges
The electron density in helium and silane/helium glow discharge plasmas was measured in a hollow cathode discharge using microwave diagnostic techniques. When silane is added to the discharge gas, the electron density is drastically reduced, which is attributed to dissociative attachment to a …
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Environmentally friendly hybrid coatings for corrosion protection: silane based pre-treatments and nanostructured waterborne coatings
… impact. In particular, multifunctional silane hybrid molecules were used to design sol-gel pre-treatments for metals and to modify the inner structure of UV curable waterborne organic coatings. In the first part of this thesis thin (hundreds of nanometers) sol-gel films consisting of an …
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Improvement in Adhesion for the Epoxy-SiC System via Plasma and Silane Surface Modification Techniques
… pretreatments and surface derivatization using silane coupling agents as surface modification techniques in an effort to enhance the adhesive bonding of epoxy to SiC coated Si wafers (SiC/Si). Durability was evaluated by immersing coated-Si samples in aqueous solutions at elevated temperature …
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