Materials Literature
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The synergism of hydrogen bond-type ultraviolet absorbers (UVA), such as phenyl salicylate and benzotriazole type UVA, and hindered amine light stabilizers (HALS) was investigated and compared with that of benzophenone type UVA. Phenyl salicylate and benzotriazole type UVA showed a similar synergistic and antagonistic…
The deformation mechanism of the extruded cylinder of AZ31 magunesium alloy depending on a condition of temperature and loading path was studied by a multi-loading test under various temperature conditions and an observation of its microscopic structure after the plastic deformation. From the experimental results, AZ3…
The Smart Joint, developed at Cornell University, is a composite device which functions as both a structural element and shape changing mechanism. Through resistive heating, the device will provide a tip deflection on the order of 5–20% of its undeflected length, with a high specific work capability. The joint possess…
Transparent conducting oxides (TCO) with p-type semiconductivity have recently gained renewed interest for the fabrication of all-oxide transparent junctions, having potential applications in the emerging field of 'Transparent' or 'Invisible Electronics'. This kind of transparent junctions can be used as a "functional…
Calcium lactate was prepared by neutralization of lactic acid and precipitated calcium carbonate (PCC). And, effects of PCC morphology (calcite and aragonite) on calcium lactate by the solution process was investigated experimentally. Despite the slow forming rate at the initial stage, the final yield of calcium lacta…
In this study, Powder X-ray diffraction (XRD)/Rietveld analysis, which has been utilized in recent years as a technique for quantifying the crystal mineral phase of cement and cement paste, was applied to quantify the reaction rate of cement minerals and the proportions of hydration products. Its accuracy and availabi…
Pulse annealing has been the subject of several studies in recent years. In its basic form, it consists of relatively short-time optically stimulated luminescence (OSL) measurements of a given sample after annealing at successively higher temperatures in, say, 10°C increments. The result is a decreasing function with…
In this study the production of Si3N4-B4C composites using spark plasma sintering technique was studied. This technique was preferred in order to minimize the reactions between starting constituents. Fully dense Si3N4 ceramic was obtained by SPS. The bulk densities of all the produced composites was found to be signif…
Self-assembling peptides can serve as building blocks for novel biomaterials. Replica exchange molecular dynamics simulations are a powerful means to probe the conformational space of these peptides. We discuss the theoretical foundations of this enhanced sampling method and its use in biomolecular simulations. We the…
Echinoid fossils are a minor yet widespread component of siliciclastic marine deposits of Paleocene and Eocene age in Texas. Echinoids are found in the marine siliciclastic units of the Wills Point Formation (lower Paleocene); the Sabinetown Formation (lower Eocene); the Reklaw, Weches, and Cook Mountain Formations (m…
In this study, a nanofiber mesh made by co-electrospinning medical grade poly(epsilon-caprolactone) and collagen (mPCL/Col) was fabricated and studied. Its mechanical properties and characteristics were analyzed and compared to mPCL meshes. mPCL/Col meshes showed a reduction in strength but an increase in ductility wh…
A dissolution experiment was carried out to identify the effects of milling condition on dissolution kinetics of silicate rock fertilizers. Initially ground materials (Ø < 250 μm for basalt, dolerite, gneiss, and Ø < 150 μm for K-feldspar) were further milled with a ball mill (Spex 8000) under dry and wet condit…
Self-propagating low temperature combustion method for the synthesis of LiMn 2 O 4 is reported. Synthesis of LiMn 2 O 4 was carried out by thermal decomposition of lithium oxalate and manganese oxalate precursors employing poly(ethylene glycol) (PEG) as a fuel. The prepared LiMn 2 O 4 was then characterized for struct…
PbS hollow spheres were successfully prepared by a sodium citrate-assisted hydrothermal process at 120 degrees C for 12 h, employing lead acetate trihydrate, thiourea and sodium citrate as precursors. The diameter of PbS hollow spheres is 200-400 nm, which is composed of about 50-80 nm nanoparticles. The synthesized p…
Polypyrrole (PPy)-coated Ag nanoparticles and nanowires were fabricated through the redox reaction between pyrrole monomer and silver nitrate in the presence of chitosan. The morphologies, compositions, and electrochemical activities of PPy/Ag composites were characterized by scanning electron microscopy, transmission…
A new method for preparing PI microspheres was proposed.The properties of the solution and dispersion medium were modulated as PVP had been added.The effects of PVP and its content on the morphology,size of PI microspheres were investigated.The results show that the favorable spherical polymer particles were obtained…
Porous polyimide (PI) containing oil were prepared by sintering. The properties of oil containing and heat resistant of materials were measured by centrifuge and thermo-gravimetric analysis respectively. The tribological behavior was investigated under different rotating speeds. The results indicate that the pore diam…
The phosphorylated lentinan was studied,the graft quantity of phosphate and viscosity in the modified lentinan were evaluated as well.Several factors,such as the quantity of phosphorylated reagents,temperature,time and pH were investigated and the quantity of phosphate and viscosity were obtained from the orthogonal t…
Investigated a method about constructing reticular structure of nature fiber through frothing solution approach.It constructed a mat with truss-like reticular structure by through bubble different press between inside and outside,and adsorbing for the fiber on the film of bubble,and bonding between fibers acted as kno…
Abstract: The application of shape memory alloys (SMA) as actuators in smart structures is a quickly developing field. The particular focus of this paper is on the aspects of modeling and simulation of adaptive structures with integrated SMAs using the finite element method (FEM). A number of generic SMA actuator wire…