Materials Literature
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This article reports on an experimental study to evaluate the effect of fabric structures on the mechanical properties of three-dimensional (3-D) textile composites reinforced with 3-D braid, 3-D woven fabric, and 3-D woven fabric with twisted yarns. The mechanical properties are tested in uniaxial tension, compressio…
Cryo-etch scanning electron microscopy (cryo-etch SEM) of aqueous gels composed of colloidal silica nanoparticles in the 1−40 nm range and liposomes of ∼200 nm gave unique morphologies. The aqueous gels are frozen at subcooled liquid nitrogen and fractured to obtain a fresh surface. High-vacuum sublimation of ice from…
Supported samples of 8 wt % monometallic Pt/C and Ru/C, as well as 12 wt % bimetallic Pt50Ru50/C, were prepared by the method of incipient wetness impregnation. Impregnated samples were subsequently reduced by hydrogen and then oxidized in air at different To temperatures. TEM and XRD examinations indicated that metal…
To reduce the time-to-market, a high throughput experimentation (HTE) method has been introduced at Bayer MaterialScience for the rapid development and optimization of polyurethane (PU) foam formulations and for the fast screening of new PU raw materials. The foam processor developed for this purpose allows automated…
Ordered arrays of ZnO nanodots were fabricated by pulsed laser deposition (PLD) using an anodic aluminium oxide (AAO) nanopore membrane. Hexagonal-shaped ZnO nanodots with an average diameter of 60 nm and a periodicity of 100 nm were uniformly assembled into hexagonally ordered nanopores of the AAO membrane. Control o…
Microcellular wood fiber reinforced PP composites, a new development using bio-fiber strengthened plastic, are prepared in an injection molding process. The microcellular composites with five different types of wood fibers (hard wood fiber, finer hard wood fiber, soft wood fiber, finer soft wood fiber, and long wood f…
There are a number of published reports of techniques that may extend the diffraction limits or otherwise improve the quality of the X-ray diffraction data from a crystal. This review touches on some of these techniques to provide a way forward for the experimentalist burdened with less than ideal crystals.
In this study, two kinds of novel hybrid biocomposite beads were prepared using alginate as polymer moiety, silica as inorganic moiety, and yeast alcohol dehydrogenase (YADH) as enzyme moiety. Silica was incorporated into the biocomposites through two approaches: in situ hydrolysis and polymerization of tetramethoxysi…
The degree of mechanical reinforcement that can be obtained by the introduction of glass fibers in biofiber (silk fabric)-reinforced epoxy composites has been assessed experimentally. The addition of a relatively small amount of glass fabric to the silk fabric reinforced epoxy matrix enhances the mechanical properties…
We study the diffusion-driven kinetics of phase separation of a symmetric binary mixture (AB), confined in a thin-film geometry between two parallel walls. We consider cases where (i) both walls preferentially attract the same component (A), and (ii) one wall attracts and the other wall attracts (with the same strengt…
Tin (Sn) nanowires, with 15 and 60 nm average diameter and up to 10 µm in length, were fabricated by an injection process using a hydraulic pressure method. The Sn melt was injected into an anodic aluminium oxide (AAO) template and solidified to form nanowires. By back etching the aluminium substrate and barrier layer…
The use of the neutral organoactinide complexes Cp * 2 AnMe 2 (An = Th, U) and the cationic complex [(Et 2 N) 3 U][BPh 4 ] for the ROMP of ε-caprolactone and l -lactide is presented. Despite their high oxophilic nature, these complexes show high activity for polymerization, yielding high-molecular-weight polymers with…
A new three-dimensional (3-D) manganese(II) borophosphate, [NH 4 ] 4 [Mn 9 B 2 (OH) 2 (HPO 4 ) 4 (PO 4 ) 6 ] (denoted MnBPO-CJ26), has been synthesized by a hydrothermal method. The structure has been determined by single-crystal X-ray diffraction. It crystallizes in the monoclinic space group C 2 /c (No. 15) with a =…
Photocatalytic oxidation of propylene with molecular oxygen at room temperature was investigated over various silica-supported metal oxides with low loading. The photocatalytic active site is assumed to be the isolated tetrahedrally coordinated metal oxides in the ligand-to-metal charge-transferred state, such as (Mde…
Entries deposited in the Protein Data Bank as of February 2004 for which both model and X-ray data were available were analysed to identify cases of twinning using such simple statistics as the R factor between potential twin-related reflections. Careful consideration of all identified twins showed that in many cases…
Microcellular wood fiber reinforced polymer materials have important applications because of their ability to reduce the density of automotive components due to their structure-property advantages. This research investigates the effects of chemical foaming agent content on cell morphology, density, and mechanical (ten…
Radiation damage is the major source of systematic error in macromolecular data collected at third-generation synchrotron beamlines. In this paper, a simple way of analysing data for radiation damage is proposed and shown to give results that are easy to interpret. Results of correction of radiation damage obtained wi…
Recombinant human-like collagen (RHLC) was blended with fibroin to prepare a novel biocompatible film as a scaffold material for hepatic tissue engineering applications. Solution blending was used to incorporate RHLC with silk fibroin to enhance the blend films biocompatibility and hydrophilicity while maintaining ela…
We engineer colloidal quantum dot nanocrystals through the choice of biomolecular ligands responsible for nanoparticle nucleation, growth, stabilization, and passivation. We systematically vary the presence of, and thereby elucidate the role of, phosphate groups and a multiplicity of functionalities on the mononucleot…
The spectral shape and observed sonoluminescence emission from Xe bubbles in concentrated sulfuric acid is consistent only with blackbody emission from a spherical surface that fills the bubble. The interior of the observed 7000 K blackbody must be at least 4 times hotter than the emitting surface in order that the eq…