Materials Literature
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Oxygen plasma was used to modify the surface properties of carbon fibers and their adhesion strength with an acrylate resin cured by electron beam. A characterization of the surface topography and the surface chemistry was carried out (topography at a micrometric and nanometric scale, specific surface area, temperatur…
In this paper, we review results on epitaxial orientation relationship, interfacial energy and atomistic studies of Au/TiO2 interface with in particular the model Au//(1 1 0)TiO2 system. The review is limited to contributions made by electron microscopy and diffraction techniques. Experimental results are also compare…
Phosphorus-containing poly(ethylene terephthalate- co -diethylene terephthalate) (PEDT) with a low melting temperature was synthesized through esterification and copolycondensation of terephthalic acid, ethylene glycol, diethylene glycol (DEG), and 3-(hydroxyphenylphosphinyl)propionic acid (HPPPA). DSC results showed…
An efficient crystallization screening method is important in drug design to yield high resolution crystallographic structures of protein–ligand complexes to understand inhibitor selectivity and potency for various members of an enzyme family. The strategy starts with a single condition for each protein–ligand complex…
The most efficient catalysts have been developed and optimized by living systems. Indeed, in vivo enzyme-catalyzed reactions are several orders of magnitude more efficient than platinum-based catalyzed reactions. However, the rate of reaction and equilibrium interactions are considerably reduced when the biological sy…
This article presents a thermomechanical model for predicting the behavior of fiber reinforced polymer (FRP) composite structures subject to simultaneous fire and compressive loading. The model includes a thermal sub-model to calculate the temperature history of the structure and a structural sub-model to predict the…
In recent years, several papers reported an enhanced dielectric anisotropy when ferroelectric particles were suspended in a liquid crystal. These results seem to be sensitive to the liquid crystal used and the preparation method of the ferroelectric particles. In this paper, we compare different preparation methods of…
The response of anisotropic pigment particle suspensions to externally applied electric fields has been explored for possible application in reflective display technologies. Three different types of pigment particle were suspended in dodecane, using a polymeric stabilizer, and showed Schlieren textures between crossed…
Using a geometry-based fundamental measure density functional theory, we calculate bulk fluid phase diagrams of colloidal mixtures of vanishingly thin hard circular platelets and hard spheres. We find isotropic-nematic phase separation, with strong broadening of the biphasic region, upon increasing the pressure. In mi…
We study thermophysical properties of a Janus fluid with constrained orientations, using analytical techniques and numerical simulations. The Janus character is modeled by means of a Kern-Frenkel potential where each sphere has one hemisphere of square-well and the other of hard-sphere character. The orientational con…
Polystyrene (PS) foams are widespread heat insulation and impact absorption materials, but many blowing agents used in their production are harmful to the environment. Pentane is a less harmful alternative and is commonly used in the manufacturing of expandable PS, but there are inadequate diffusion data of pentane in…
Highly exfoliated and intercalated silicone rubber (SR) nanocomposites based on natural montmorillonite (Cloisite Na+) and organically modified montmorillonite (Cloisite 30B and Cloisite 20A) were successfully prepared by melt‐mixing technique. Dispersion of the nanoclays in the rubber nanocomposites was subsequently…
N-Butyl amine has been grafted unto Dow epoxy resin. The product was evaluated as an acid inhibitor by gravimetric techniques. The reduction in corrosion of aluminium in 1 M HCl solution was 92% at and 83% at with an inhibitor concentration of 100 ppm. The corrosion rate at this concentration was and mm/yr at and . Fo…
Abstract Herein, we report a facile method to prepare thermally reversible, flexible, transparent, and luminescent ionic organosilica gels with tunable emission colors. The reaction of an amino‐functionalized ionic liquid ([NH2‐Bim]Br) with 3‐(triethoxysilyl)propyl isocyanate results in an ionic‐liquid‐modified alkoxy…
The present work describes the development of epoxy composites using varying weight percentages (0.5, 1.0 and 1.5 wt%) of glycidyl-functionalized mullite (GM) fibre and diglycidyl ethers of bisphenol-A epoxy resin cured with diamino diphenyl methane. The mullite fibre was synthesized via the sol–gel method and its sur…
A computational experiment that investigates single-walled carbon nanotubes (SWNTs) has been developed and employed in an upper-level undergraduate physical chemistry laboratory course. Computations were carried out to determine the electronic structure, radial breathing modes, and the influence of the nanotube’s diam…
Liquid nitrogen finds increased application as a coolant in various machining processes, due to its effectiveness in controlling the machining temperature and also in being a clean technology. EN31 is a difficult-to-cut material, and Sol-Gel (SG) alumina is a modern grinding wheel with self-sharpening characteristics.…
We demonstrate here that, whereas the rhenium(I)-zinc porphyrin dyad fac-[Re(CO)3(bpy)(Zn·4'MPyP)](CF3SO3) [1; 4'MPyP = 5-(4'-pyridyl)-10,15,20-triphenylporphyrin] shows no evidence for photoinduced electron transfer upon excitation in the visible region because the charge-separated state ZnP(+)-Re(-) is almost isoene…
The flammability characteristics and thermal performance of epoxy compounds containing ammonium polyphosphate (APP) and melamine cyanurate (MCA) were studied by LOI, UL-94, TG, FTIR and SEM. The compounds containing 12 wt% APP and 3 wt% MCA can pass V-0 in the UL-94 test, while neat EP can't pass any rating. The SEM i…
We investigate the dynamical properties of photoexcited carriers in a single monolayer of graphene at room temperature in air using femtosecond time-resolved luminescence spectroscopy. The luminescence kinetics are observed in the near-infrared region of 0.7-1.4 eV and analyzed based on the two-temperature model descr…