Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Heat and moisture transport plays an important role in many engineering areas. In many sweat transport systems, such as clothing assembly, the moisture concentration (or sweat) is relative small and the air concentration reaches a steady state quickly. In this paper, a quasi-steady-state multi-component and multi-phas…
Abstract In this study, water was used as a coblowing agent in the carbon dioxide (CO2) extrusion foaming process in a twin screw extruder. It enlarged cell size and thus lowered foam density for better thermal insulation. Different strategies have been studied including direct injection of water into the extruder wit…
Abstract Two different alumina powders were dispersed in low‐density polyethylene (LDPE) to evaluate if any role can be ascribed to the crystalline phase, size and morphology of the alumina filler. In particular a submicrometric α‐alumina and a nanocrystalline transition (γ/δ) alumina were added to the polymer at 5 wt…
This paper presents a systematic approach to the multivariable robust control of a hybrid fuel cell gas turbine plant. The hybrid configuration under investigation comprises a physical simulation of a 300 kW fuel cell coupled to a 120 kW auxiliary power unit single spool gas turbine. The facility provides for the test…
We present our study of the effect of substrate induced strain on La(5/8-y)Pr(y)Ca(3/8)MnO(3) (y = 0.45) thin films grown on LaAlO(3), NdGaO(3) and SrTiO(3) substrates that show large scale phase separation. It is observed that unstrained films grown on NdGaO(3) behave quite similarly to bulk material but the strained…
Abstract Using glancing angle deposition by ion beam sputtering, sculptured thin films (STFs) consisting of various Si nanostructures of manyfold shapes, such as inclined and vertical columns, screws, and spirals, were deposited on Si substrates. It will be shown that morphology, shape, and diameter of the structures…
Abstract In this work, aligned and molecularly oriented bone‐like PLLA semihollow fiber yarns were manufactured continuously from an optimized homogeneous polymer‐solvent‐nonsolvent system [PLLA, CH2Cl2, and dimethyl formamide (DMF)] by a single capillary electrospinning via self‐bundling technique. Here, it should be…
Abstract Hexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4), and decamethylcyclopentasiloxane (D5) were equilibrated with potassium tert‐butoxide or triflic acid in bulk at 100 °C to elaborate the 1H NMR and 13C NMR spectra, SEC elution curve, and MALDI‐TOF (MT) mass spectrum of a fully equilibrated po…
Abstract Optimum processing conditions for the electrospinning of water‐soluble eggshell membrane (S‐ESM) were investigated. Two biocompatible polymers, poly(ethylene oxide) (PEO) and poly(vinyl alcohol) (PVA), were used to improve the processability of S‐ESM for electrospinning in aqueous media. Uniform nanofibers wi…
Abstract Cycloaliphatic epoxy hybrimer bulk was successfully fabricated by thermal curing of cycloaliphatic epoxy oligosiloxane resin synthesized by a sol‐gel condensation reaction with methylhexahydrophthalic anhydride (MHHPA) and tetrabutylphosphonium methanesulfonate (TBPM). The composition of MHHPA and TBPM in the…
Abstract Using glancing angle deposition (GLAD) by ion beam sputtering of Si on differently patterned substrates, periodically arranged Si nanostructures were obtained. Patterns with tetragonal, honeycomb‐like, and hexagonally closed packed (hcp) arrangement of the artificial seeds for the subsequent deposition at obl…
Sodium gadolinium fluoride nanocrystals have been prepared in the solvent N -(2-hydroxyethyl)-ethylenediamine (HEEDA) at 200 °C. The formation of the cubic and the hexagonal phase in the synthesis can be controlled by properly adjusting the concentration of fluoride and the ratio between sodium and gadolinium. The abs…
Discrimination of thin film elements by backscattered electron (BSE) imaging of field emission scanning electron microscope was examined. Incident electron acceleration voltage dependence on thin films' BSE intensities in five elements (Au, Ag, Ge, Cu and Fe) on a silicon substrate was experimentally measured from 3 t…
Abstract DFT and TDDFT calculations at the level of PBE0/6‐31G(d)/6‐31+G(d) were performed systematically on seven porphyrins with symmetrical meso‐substitutents. Our results show that the planarity of the free base porphyrin (BP) are affected by the introduction of substitutents at the meso‐position of the ring. Geom…
Computer simulations are used to investigate the stability of typical dislocations in uranium dioxide. We explain in detail the methods used to produce the dislocation configurations and calculate the line energy and Peierls barrier for pure edge and screw dislocations with the shortest Burgers vector ½⟨110⟩. The easi…
Herein we report two new ligands, 1,4,7-tris(carboxymethyl)-10-[2-(dihydroxyboranyl)benzyl]-1,4,7,10-tetraazacyclododecane (L(1)) and 1,4,7-tris(carboxymethyl)-10-[3-(dihydroxyboranyl)benzyl]-1,4,7,10-tetraazacyclododecane (L(2)), which contain a phenylboronic acid (PBA) function and a 1,4,7,10-tetraazacyclododecane-1…
Abstract Novel fluorinated polymer nanoparticles (PNPs) for 19 F MRI were prepared by living radical polymerization initiated by a dendrimer. The dendritic macroinitiator with Br substituents was synthesized from hydroxy‐group‐terminated G2 polyamidoamine dendrimers. The arborescent fluorinated polymers of 2,2,3,3‐tet…
Well-defined diblock copolymers have been prepared in which three different ferrocene-based monomers are combined with 1,1-dimethylsilacyclobutane (DMSB) and 1-methylsilacyclobutane, respectively, as their carbosilane counterparts. Optimized procedures are reported for the living anionic chain growth following sequent…
Abstract polyethylene oxide (PEO)/gelatin blend membranes of four different compositions (w/w) (5/95, 10/90, 20/80, and 30/70) were prepared by solution casting. The films were irradiated by gamma radiation at a total dose of 250 krad (dose rate of 321 krad/h). The X‐ray diffractograms demonstrate both the PEO and rad…
Abstract Poly(vinyl alcohol) (PVA) was structurally modified with two different types of chemicals under nitrogen atmosphere in the presence of Sb2O3 as a catalyst at 80°C in an aqueous medium. An FTIR and NMR spectrum confirmed the structural modification of PVA. DSC and TGA counseled the thermal properties of struct…