Materials Literature
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In this work we have developed a stacked Ru underlayer and have studied its effects on the improvement of recording performances for CoCrPt-SiO2 granular-type dual-layer perpendicular media. The c-axis distribution ΔΘ50 of the 13.2 nm thick stacked Ru underlayer was 4.5°, which was about 33% smaller than that of Ru mo…
The melt morphology of polystyrene−poly(ethylene oxide) metallo-supramolecular diblock copolymer has been investigated using small-angle X-ray scattering. The two polymer blocks are linked via a bis(terpyridine)ruthenium(II) ion complex, and tetraphenylborate counterions are used to neutralize the copolymer. A highly…
Abstract Resolution of enantiomers through selective crystallisation of diastereomeric inclusion compounds can extend the scope of traditional racemate resolution beyond salt forming compounds. To assess the practical value of this approach the literature was carefully screened and promising results were checked. Also…
ABSTRACT: A study on the influence of the solubilization and diffusion process on the barrier properties of 4 different edible films is presented. The water and oxygen barrier properties of zein, alginate, casein, and chitosan films were measured at 25°C. A mathematical model was fitted to the experimental data to obt…
High-power ceramics of the composition 0.8Pb(Zr 0.5 Ti 0.5 )O 3 –0.2Pb[(Zn 0.8 Ni 0.2 ) 1/3 Nb 2/3 ]O 3 (0.8PZT–0.2PZNN) + 0.5 wt% MnO 2 have excellent piezoelectric and dielectric properties such as d 33 =320 pC/N, ε 33 T / ε o =1227, k p =0.54, and Q m =1265. However, the sintering temperature of this composition is…
O poli[(etileno)-co-(acetato de vinila)] (EVA) possui grande aplicação na indústria calçadista, sendo utilizado na confecção de placas expandidas para posterior corte de palmilhas e entressolas. Estudos realizados na região sul do Brasil mostraram que os resíduos gerados pela indústria calçadista foram superiores a 20…
Abstract Mosaic, single‐crystal CaCO 3 thin films have been prepared on modified poly(ethylene terephthalate) (PET) templates. Surface modification of PET through the introduction of carboxylic acid groups (COOH‐PET), and the subsequent physical and chemical adsorption of poly(allylamine hydrochloride) (PAH) at pH 8 (…
The thermal stability of thiol-passivated gold colloids has been studied by means of X-ray photoelectron spectroscopy. Different colloids were chemically synthesized with thiol lengths from 3 to 8, and 16 carbon atoms. Depending on the synthesis parameters, the mean gold particle size varied from 1.6 to 4.9 nm for the…
Abstract New paths for the fast and reliable analysis of cellulose esters (CE) via subsequent functionalization and 1 H NMR spectroscopy were studied. Perpropionylation of the CE is an inexpensive and efficient method. For cellulose diacetates used as representative ester well resolved 1 H NMR spectra were obtained, w…
We have investigated carbon nanotube (CNT)-field emitter array (FEA) for the application of lighting system like back light unit (BLU) in liquid crystal display (LCD). The photosensitive CNT paste was synthesized by mixing of multiwalled carbon nanotubes (MWNTs), spin on glass (SOG), organic vehicle, photosensitive mo…
Two series of non‐symmetric banana‐shaped compounds, both with one alkyl and one alkenyl terminal tail, have been synthesized and studied. Both series were compared with the corresponding series with two saturated terminal alkyl tails. All the compounds have a bent central 1,3‐phenylene bis(4‐benzoyloxy)benzoate core;…
A number of independent studies have reported increased ultrasound bioeffects, such as hemolysis and hemorrhage, when ultrasound contrast agents are present. To better understand the role of cavitation in these bioeffects, one- and two-dimensional models have been developed to investigate the interactions between ultr…
[structure: see text] We prepared a zinc complex of bis(1-methylimidazolyl)-m-gable porphyrin. The automatically assembled coordinate species showed a complex mixture of wide molecular weight distributions accompanied with assemblies of specific assembly numbers. When this zinc complex was once dissociated by the addi…
The aim of the paper is to develop a micromechanical model for the evaluation of the overall constitutive behavior of a composite material obtained embedding SMA wires into an elastic matrix. A simplified thermomechanical model for the SMA inclusion, able to reproduce the superelastic as well as the shape memory effec…
Abstract The clay mineral assemblages and microtextures of a suite of mudrocks from the Lias Group of England and Wales indicate important regional differences in burial history. Samples from the northern Cleveland Basin are characterized by illite-smectite (I-S, 90% illite) and little carbonate whilst samples from th…
Abstract Moisture was treated on a silica surface and it was added into bis(triethoxysilylpropyl)disulfide (TESPD)/carbon black (CB)/S-SBR compound and mixed in an internal mixer. The effects of moisture were investigated with respect to the temperature rise during mixing, processability, cure characteristics, and mec…
Abstract Rod–coil amphiphilic diblock copolymers, consisting of oligo( p ‐phenylenevinylene) (OPV) as a rod and hydrophobic block and poly(ethylene oxide) (PEO) as a coil and hydrophilic block, were synthesized by a convergent method. The aggregation behavior of the block copolymers in a selective solvent (tetrahydrof…
Patterned magnetic recording media composed of the arrays of Co cylinders were fabricated using anodic porous alumina with single domain hole configuration. The ac electrodeposition of Co into the holes of the alumina matrix of 63 nm hole interval generated the arrays of Co cylinders with high aspect ratios. The struc…
Reactions of trimethylaluminum, triethylaluminum, and diethylaluminum chloride and ethylaluminum dichloride with silica gel have been studied experimentally by infrared spectroscopy and elemental analysis. The silica gel was subjected to different pretreatments to alter surface functionalities prior to reaction. In al…
Abstract Microwave irradiation technique was used for the chemical modification and grafting of protein fibrous materials, such as domestic silk (Bombyx mori), tussah silk (Antheraea pernyi), and wool fibres. Epoxide compounds Denacol EX810 and EX313 reacted effectively with the protein substrates. As alkali catalysts…