Materials Literature
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INTRODUCTION: A new method for preparation of silver nanoparticles (AgNPs) based on using hydrazino-isatin derivatives in an aqueous methanol reaction medium is reported here. AgNPs were prepared using silver nitrate solubilized in a water core as the source of silver ions and 3-hydrazino-isatin derivatives (3-hydrazi…
Abstract This paper describes the influence of the chain length and the functional group steric accessibility of thiols modifiers on the phase transfer process efficiency of water synthesized gold nanoparticles (AuNPs) to toluene. The following thiols were tested: 1-decanethiol, 1,1-dimethyldecanethiol, 1-dodecanethio…
Carbon nanotubes as potential material for drug delivery can pass through cell walls, transfer, and liberate drugs in particular tissues. The goal of this article is to survey the insertion of an anticancer drug called Tretinoin into CNT (10, 7) and CNT (8, 5). All computations are surveyed by molecular dynamics simul…
An ingot of NdFeB alloy was disintegrated by hydrogen decrepitation (HD). High-energy ball milling technique with hard metal milling elements and balls was employed to refine HD powders down to particle size optimum for magnet processing. The experiments were performed according to experimental plan to optimize the mi…
Enzymatic hydrolysis of chitosan (CTS) is studied by viscosity measurements, velocity sedimentation, and diffusion. It is found that the incubation of CTS in acetic acid solution is always accompanied by a decrease in the relative and intrinsic viscosity of CTS, but the chains are not destroyed in the process, as evid…
The use of eco-friendly composites has gained attraction due to its lightweight and moderate strength in recent years. The aim of this paper was to study the influence of the stacking sequence of glass and henequen fabrics on the mechanical properties of epoxy composites. Fiber/Matrix interface adhesion was examined u…
Structural studies of the nanocrystalline titanium powders produced by cryogenic milling followed by severe plastic deformation consolidation are performed. The results obtained are compared with the results obtained for monolithic titanium subjected to severe plastic deformation by torsion.
In this work, zinc sulfide (ZnS) thin films were prepared by radio frequency (RF) magnetron sputtering on glass substrates. The effects of sputtering power, working pressure, substrate temperature and annealing treatment on the structural and optical properties of ZnS films were studied using X-ray diffraction and UV-…
Dielectric properties and microstructures of ZrO 2 thin films prepared by the sol-gel method at different annealing temperatures have been investigated. All films exhibited ZrO 2 (111) highly orientation perpendicular to the substrate surface and the grain size increased with increasing annealing temperature. Dielectr…
α-Gd 2 (MoO 4 ) 3 , space group C 2/ c , molybdate has been prepared by chemical precipitation in water-based solution at 24°C and subsequent calcination at 800°C followed by slow cooling. Micromorphology of the oxide products has been evaluated by SEM. Phase purity of final oxide product and structural parameters of…
A series of carbon graphite-supported 12-tungsto-silicic (H4SiW12O40, abbreviated as SiW12) catalysts with various loadings, were prepared and characterized by means of FTIR, XRD, and polarography. These series of catalysts were attached onto glassy carbon (GC) electrodes by using polyvinylidene difluoride (PVDF) as b…
Abstract The stabilizing effect of epoxy resin (EP)/aluminum trihydroxide (ATH) was measured by thermogravimetric analysis (TGA) in an N 2 flow. The Kissinger and Flynn-Wall-Ozawa methods were used to determine the activation energy of non-isothermal degradation at different stages. The results showed that there was a…
Ultra-fine ZrB 2 powders were synthesized by sol-gel carbothermal processing using zirconium oxychloride (ZrOCl 2 .8H 2 O), boric acid (H 3 BO 3 ) and sucrose (C 12 H 22 O 11 ) as raw materials. Additionally, mannitol was used as cosolvent to obtain a stable high-concentration ZrB 2 sol. Since C 12 H 22 O 11 can be co…
Author: Chung, Kang Ko et al.; Genre: Journal Article; Issued: 2014; Title: A salt-flux synthesis of highly porous, N- and O-doped carbons from a polymer precursor and its use for high capacity/high rate supercapacitors.
The reorientation dynamics of the director, which affects the optical response of a dual-frequency nematic liquid crystal under the action of an electric field in cells with hybrid-oriented twist structure, has been studied in the framework of continuum theory. The proposed model makes it possible to find the angular…
High voltage insulators are the inherent part of the power system. Among them composite insulators are essential for medium and high voltage applications. A factor which has a major influence on the electrical performance of composite insulator is an electric field distribution along their length and surface. In this…
The aim of this work was to determine the effect of composite additives on the thermal and mechanical properties of aluminum nitride (AlN) in detail. The composite system has not been studied in depth before. The hot-pressed AlN was prepared with Y 2 O 3 -Dy 2 O 3 -YF 3 and Y 2 O 3 -Dy 2 O 3 -CaO as the composite sint…
ABSTRACT The paper presents the study results on chemical composition of the coarse primary M7C3 carbides occurring in the soft annealed NC11LV/D2 tool steel consisting of: 1.53% C; 11.65% Cr; 0.01% W; 0.81% Mo; 0.068% V; (balance iron plus admixtures), used for cold operation. The microanalyzer of type SEMPROBE Su-30…
The new chalcogenide glass of the As 2 S 3 -I-Br system, which is resilient to crystallization at room temperature, was synthesized. The glass’s transition point and refractive index at a wavelength of 635 nm are determined. A correlation between the aforementioned properties and the glass composition was found.
Abstract A study was carried out to evaluate the effects of molecular weight and molecular structure on non-isothermal crystallization behavior of recycled and virgin polyamides (PA) and their corresponding glass fiber (GF) composites. Two different recycled polyamides (PA), namely post-industrial waste (PIW) and post…