Materials Literature
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Impregnation techniques for corundum (S BET = 0.5 m2/g) as a support for Ni catalysts for C3–C4 alkane pyrolysis into catalytic filamentous carbon (CFC) are compared. The effects of the following factors on the uniformity of the active component (Ni) deposition on the inert support and on the CFC yield (g CFC)/(g Ni)…
Solar grade silicon (SoG-Si) is the key material for photovoltaic applications. In this study, the silicon grain size, concentration of HF, leaching time and leaching temperature were investigated by orthogonal methods. The results showed that the silicon grain size is the most important factor for the purification of…
BaTiO3 powders are prepared by sol-gel method by cotton template. Polypyrrole is prepared by chemical oxidation route in the emulsion polymerization system. Then BaTiO3-polypyrrole composites with different mixture ratios are prepared by as-prepared material. The structure, morphology, and properties of the composites…
Curing systems play a vital role in designing rubber compounds for various industrial applications. Keeping this in view, a comparative study of the effects of four different curing systems such as sulfur, dicumyl peroxide (DCP), metal oxide (PbO) and epoxy resin on the curing characteristics, physico-mechanical, and…
Incipient faults in transformer can degrade both oil and cellulose insulation, leading to the formation of dissolved gases. The authors investigate the relationship between incipient surface discharge and key gases. First, this paper presents the experimental platform and test method. Second, by means of statistical h…
Bagasse is an abundant agricultural byproduct. The use of bagasse has generated much interest due to its low cost, possibility of environmental protection and use of locally available renewable resources. In this paper, cellulose was dissolved in the ionic liquid （1-butyl-3-methylimidazolium chloride） and regenerated…
ASTM D2303 standard provides a method for evaluating the tracking and erosion resistance of polymeric insulators under ac voltages. In this paper, the above method has been extended for evaluating the performance of the insulators under dc stresses. Tests were conducted on polymeric silicone rubber (SR) insulators und…
Epoxide-amine oligo-adducts were synthesized via a one-pot microwave assisted heterogeneous catalytic transfer hydrogenation. Accordingly, 4-nitroanisole was reduced under microwave conditions to give 4-aminoanisole which reacted immediately with the diglycidyl ether of bisphenol A in an addition polymerization reacti…
As a new biomaterial, recombinant spider silk protein has attracted much attention in tissue engineering. The pNSR-16/ BL21(DE3)pLysS strains fermented and produced the recombinant spider silk protein, which was then cast into scaffolds. NIH-3T3 cells were cultivated with extractions of the scaffolds in vitro. The cyt…
Abstract Protective SiOx coating on polymeric substrates were deposited at room temperature by atmospheric pressure plasma jet (APPJ), using HMDSO (Hexamethylsiloxane) as monomer and argon (Ar) as carrier gas, have been investigated for the surface properties as a function of plasma operational parameters including in…
Collagen is regarded as one of the most useful biomaterials. Collagen was extracted from wild Chinese soft-shelled turtles (Pelodiscus sinensis) and its molucular patterns and antioxidant activities were investigated. The SDS-PAGE analysis revealed that the collagen had three α bands with an approximate molecular weig…
It was previously demonstrated that the use of a pyrrole-based silane (PySi) for surface treatment of Al alloys provides both active and barrier protection due to the deposition of a hybrid coating, containing polypyrrole and polysiloxane chains. To further explore these features, a wider range of Al substrates and di…
Chemical vapor deposition can afford conformal films with step coverage > 90% in via or trench features with aspect ratios {greater than or equal to} 30:1 when growth proceeds at a substrate temperature {less than or equal to} 300{degree sign}C under a precursor pressure > 0.1 Torr. These conditions correspond t…
Osmotic stress tensor is introduced to describe the osmotic pressure in colloidal crystals within the framework of the theory of the Poisson-Boltzmann equation. The osmotic stress tensor is related to the fundamental stress tensor, which is associated with the Poisson-Boltzmann equation. It is shown that the osmotic s…
The prediction of very long term corrosion of iron and low alloy steel in atmospheric conditions or in hydraulic binder media is a crucial issue for the conservation and restoration of heritage artefacts. For both media, the typical iron corrosion product layers (CPL) can be described as a matrix of goethite (α-FeOOH)…
This paper investigates analytically the electric field distribution of graded spherical core-shell metamaterials, whose permittivity is given by the graded Drude model. Under the illumination of a uniform incident optical field, the obtained results show that the electrical field distribution in the shell region is c…
The NMR spectra of 63Cu and 65Cu natural copper isotopes in a LiCu2O2 multiferroic single crystal compound have been measured above and below the temperature of magnetic phase transition (T c = 23 K) in zero magnetic field and in applied magnetic field H 0 = 94 kOe parallel to the c axis of the crystal. In LiCu2O2 bel…
The surfaces of AMg6 (aluminum-magnesium) alloy samples that have passed accelerated biocorrosion tests have been investigated in a Quanta-3D scanning electron microscope. The alloy samples have been treated with the Ulocladium botrytis Preuss fungus, which is an active destructive fungus and was previously extracted…
Multilayer and two-layer fiber preforms with a fluorosilicate glass core have been produced by the modified chemical vapor deposition (MCVD) process with SiF 4 as a fluorination agent. The fluorine profile across the preforms has been studied, the fluorine concentration in the glass has been determined as a function o…
We studied the dependence of absorption and fluorescence spectra of complexes of Al, In, Sc, Y, and La with dibenzoylmethane and naphthoyltrifluoroacetone, as well as the dependence of sensitized fluorescence of dyes in nanoparticles of these complexes, in relation to the water pH, the ratio between ions and diketones…