Tungsten powder mixed with an appropriate amount of nickel and iron powders is used as raw material to fabricate large-scale tungsten whisker-like structure. The morphology, microstructure and composition of the whisker-like tungsten are observed and tested by scanning electron microscope and FESEM, transmission electron microscopy, X-ray spectroscopy, and X-ray diffraction, respectively. The m...

This study aims to prove the complexation of cefpodoxime proxetil (CP) by hydroxypropyl-βcyclodextrin (HP-βCD) in the presence of sodium carboxymethyl cellulose (Na CMC), and investigates the permeability of CP in the complexes. The CP–HP-β-CD complex was prepared by kneading method and was characterized by Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR) and D...

A protocol is proposed for the solvent-free on-surface synthesis of covalent organic framework monolayers by condensation of diboronic acids. Monomers are vapor-deposited and water is used for equilibrium regulation. Samples are characterized on progressively smaller length scales by light microscopy, Scanning Electron Microscopy, and Scanning Tunneling Microscopy.

This study focused on the development of a crack repair stick as a new repair method along with self-healing materials that can be used to easily repair the cracks in a concrete structure at the construction site. In developing this new repair technique, the self-healing efficiency of various cementitious materials was considered. Likewise, a crack repair stick was developed to apply to concret...

The non-biodegradable and non-renewable nature of plastic packaging has led to a renewed interest in packaging materials based on bio-nanocomposites (biopolymer matrix reinforced with nanoparticles such as layered silicates). Bio-nanocomposite films based on soy protein isolate (SPI) and montmorillonite (MMT) were prepared using melt extrusion. Effects of the pH of film forming solution, MMT co...

The influence of water vapor on small fatigue crack growth rates in the near alpha titanium alloy Ti-6242S was investigated using a combined ultrasonic fatigue/environmental scanning electron microscope system (UF-SEM). Small cracks were grown at cyclic frequency 20 kHz laboratory air, partial pressures ranging from 65 to 1330 Pa, and vacuum (1.7 × 10-4 Pa). Fatigue grew higher all versus vacuu...

In this work, poly(lactide-co-trimethylene carbonate) and polylactide/ polytrimethylene carbonate films are prepared using a film blowing method. The process parameters, including temperature and screw speed, are studied, and the structures and properties of the P(LA-TMC) and PLA/PTMC films are investigated. The scanning electron microscope (SEM) images show that upon improving the content of T...

results gelatin films exhibited good tensile strength and elongation at break, water solubility, swelling, and water vapor permeability. incorporation of tam into the gelatin films caused a significant decrease in tensile strength and swelling, and a significant increase in elongation at break, water solubility, water vapor permeability and whiteness of the films. gelatin films exhibited low an...

The focus of this project was the characterization and growth of 3C-silicon carbide (b-SiC) nanowires using the vapor-liquid-solid method. Chemical vapor deposition (CVD) occurred at temperatures ranging from 1050oC to 1100oC using silane and propane as precursor gases. Experimentation with various surface preparations, including metal catalysts such as nickel (Ni) and aluminum (Al) deposited b...

ZnO thin film of 80 nm thickness was deposited by the sol-gel spin coating method on SiO2/Si substrate and subsequently post-annealed at 500°C with a flow of oxygen for 60 min. Crystallographic structure of the sample was characterized by X-ray diffraction (XRD) method while a field emission scanning electron microscope (FESEM) was used to investigate the surface physical morphology ...