Materials Literature
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Abstract Nonisothermal crystallization behavior of poly(butylene terephthalate) (PBT) was investigated by means of differential scanning calorimetry. The nonisothermal crystallization kinetic process was analyzed and relative kinetic parameters were obtained with the Avrami and Liu–Mo equations. The results demonstrat…
Abstract Hydrogen production by water splitting with photoelectrochemical cell is one of novel ways to provide clean and renewable energy. Ag‐In‐S ternary semiconductor thin film prepared by chemical bath deposition (CBD) on the surface of indium tin oxide conductive glass represented a mixture phase of AgInS2/AgIn5S8…
Abstract Dimerization of a series of regioisomeric 1,4‐, 1,3‐, and 1,2‐bis(phenylethynyl)benzene radical anions (bPEBs.−) substituted by various electron‐donor and/or electron‐acceptor groups was studied during the pulse radiolysis in N,N‐dimethylformamide (DMF). The transient absorption of bPEB.− decayed with the for…
Using classical density functional theory (DFT) we analyze the structure of the density profiles and solvation pressures of negatively charged colloids confined in slit pores. The considered model, which was already successfully employed to study a real colloidal (silica) suspension [S. H. L. Klapp et al., Phys. Rev.…
Additions of Sc and Zr were introduced into Al–15 vol.-B4C composites, and eight experimental composites with different Sc and Zr levels were prepared via a conventional cast process. Optical microscopy, SEM and TEM were applied for observing the as cast microstructures, including the interfaces between the Al matrix…
Two individual high-pressure die-casting geometries were developed in order to study the influence of process parameters and different alloys on the distortion behaviour of castings. These geometries were a stress lattice and a V-shaped sample tending to form residual stress due to different wall thickness respectivel…
A numerical model was proposed to simulate the solidification process of an outer shell of work roll made by the horizontal centrifugal casting technique. Shallow water model was adopted to solve the 2D average flow dynamics of melt spreading and the average temperature distribution inside the centrifugal casting moul…
Bimetallic metal nanoparticles are often more catalytically active than their monometallic counterparts, due to a so-called ‘synergistic effect’. Atomically precise ruthenium-platinum clusters have been shown to be active in the hydrogenation of phenylacetylene to styrene (a reaction of importance to the polymer indus…
New alloy developments such as γ -TiAl aim at weight reduction and improvement of performance capabilities of aircraft engines. A drawback of TiAl is its low fluidity, which easily leads to misruns during the casting process. In this work a three-phase mold filling and solidification simulation methodology has been es…
BiPd(2)O(4) and PbPd(2)O(4) were synthesized at high pressure of 6 GPa and 1500 K. Crystal structures of BiPd(2)O(4) and PbPd(2)O(4) were studied with synchrotron X-ray powder diffraction. BiPd(2)O(4) is isostructural with PbPt(2)O(4) and crystallizes in a triclinic system (space group P1, a = 5.73632(4) Å, b = 6.0253…
On page 2692 Damia Mawad, Gordon G. Wallace, and co-workers report the development of a single-component conducting polymer (CP) hydrogel that combines both electroproperties and hydrogel characteristics, i.e., electroactivity at physiological pH and temperature, a notable swellingratio, and a porous internal structur…
Abstract An oxygen deficient Li4Ti5O12 was investigated for lithium ion batteries (LIBs) in this work. Compared with nitrogen doping and pristine Li4Ti5O12, the oxygen deficient Li4Ti5O12 exhibits significant improvement of electrochemical performance, it could deliver a specific capacity of 75 mAh/g even at a high ch…
BACKGROUND: Incorporation of proteins/peptide drugs into nanoparticulate drug delivery system is one of the effective approaches to increase the stability of protein/peptide drugs against enzymatic degradation, to release them in a controlled fashion and to achieve site-specific drug delivery. OBJECTIVE: Our goal was…
Abstract A copolymer system with controlled hydrophilicity has been prepared through copolymerization technique and its capability as controlled drug release carrier is investigated. The effect of copolymer composition on water uptake, thermal properties, and morphology is reported. The water uptake increases with inc…
The investigations reported here describe the synthesis of carbon nanowalls (CNWs) by microwave electron-cyclotron resonance (ECR) plasma-assisted chemical vapour deposition (PACVD) process without an application of external bias to the substrate during growth. CNWs were grown on silicon (Si) substrates using hydrogen…
We present a novel multi-scale Dendritic Needle Network (DNN) approach in order to model well-developed highly-ramified dendritic microstructures on the coarser scale of several crystal grains while retaining a faithful quantitative description of the transient dynamics of individual dendritic branches. This approach…
The influence of natural convection on the evolution of the solid-liquid (s/l) interface during the initial transient of upward directional solidification was studied on Al-4 wt.% Cu alloy by coupling the two dimensional quantitative phase-field model with the Navier-Stokes equations. The simulations were compared wit…
Highly ordered mesoporous benzene–silicas with 2D hexagonal ( p 6 mm ) and 3D cubic ( Im 3 m ) symmetry were prepared using weaker acids than hydrochloric acid in the presence of Pluronic P123 and F127 triblock copolymer templates. The resulting ordered mesostructures of 1,4-bis(triethoxysilyl)benzene (BTEB) were well…
Abstract Adipic acid was synthesized by the oxidation of cyclohexene using 30% hydrogen peroxide in a microemulsion in the presence of sodium tungstate as catalyst. The proposed green process is environmentally friendly since catalyst and surfactant are recycled and pure adipic acid is produced in high yield (70% to 7…
Abstract Cationic water‐borne polyurethanes (CWPU) were prepared and blended with wheat gluten (WG) in aqueous dispersion. The freeze‐dried blend powders of WG/CWPU were thermally compression‐molded into sheets. The tensile strength of the WG/CWPU blends decreased with increasing CWPU content, showing a relationship b…