Materials Literature
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We couple a morphological study of a mixture of diblock copolymers and rod-like, solid nanoparticles with a micromechanical simulation to determine how the spatial distribution and aspect ratio of the particles affects the mechanical behavior of the composite. The morphological studies are conducted through the SCF/DF…
A new triterpenoid, 2beta,3beta,19alpha,24-tetrahydroxy-23-norurs-12-en-28-oic acid (4), together with three known triterpenoids 3-oxo-19alpha,23,24-trihydroxyurs-12-en-28-oic acid (1), 2alpha,3beta,19alpha,23-tetrahydroxyurs-12-en-28-oic acid (2), 2alpha,3alpha,19alpha,23-tetrahydroxyurs-12-en-28-oic acid (3), was is…
Reduction of silver nitrate in polyol/toluene biphasic medium containing dodecanethiol led to organised silver nanowires, results of an interaction between silver nanoparticles and the layered phase AgSC12H25.
A conductive transparent electrode is used to observe and quantify the nucleation-growth process of scale deposition. The CaCO 3 deposition is accelerated by increasing the interfacial pH induced by an electrochemical reaction on the electrode surface. Three measurements were simultaneously obtained with respect to ti…
A new electric double layer capacitor (EDLC) was constructed by using polymer hydrogel electrolyte prepared from cross-linked potassium poly(acrylate) and a KOH aqueous solution. The electrochemical characteristics of the EDLC cell were investigated by cyclic voltammetry and charge/discharge cycle testing compared wit…
Macroporous gold spheres with a diameter of ∼9 µm have been formed by a facile method, employing porous organic bead templates and preformed gold nanoparticles.
Nickel stearate was used as a chemical template and metal source for the easy-and-fast preparation of Ni/Al2O3 catalyst with a mesoporous structure. Ni-Nx and Ni-Hx were prepared using an NH4OH-treated precipitate and a HCl-treated solution as the chemical template, respectively, and these materials show only the effe…
Abstract Bi 8 (SeO 3 ) 9 Br 6 wurde auf der Basis thermodynamischer Berechnungen aus BiOBr und SeO 2 über eine Autotransportreaktion im Temperaturgradienten von 670 nach 660 K synthetisiert. Kristalle von CsSm 21 (SeO 3 ) 24 Br 16 entstanden aus der Umsetzung äquimolarer Gemenge von SmOBr und SeO 2 im CsBr‐Flux bei 10…
Vanadium oxide ( VO x ) nanotubes, with embedded Na + , K + , or Ca 2 + -ions, were synthesized and investigated structurally and electrochemically in a Li-battery context. The nanotubes consist of scroll-like layers of vanadium oxide separated by structure-directing primary amines or metal cations. X-ray diffract…
The corrosion behavior of heat resistant ferritic steels for boiler tubes in a steam/air dual environment simulating the non heated areas at 600°C has been investigated. Corrosion rates of the ferritic steels on the air sides under a condition of steam/air dual environments were increased more significantly than those…
Recent developments ofpolymer nanocomposites were reviewed in terms Offobrlcotlon, mechonlcal ond barrier properties, thermal stobiiity, flame retardoncy and otherfundionol properties. PolymerlC/oy nonocomposltes can befabricated through In situ polymerlsatlon, solution blending, and melt compounding. The high asped r…
The effect of the simultaneous partial substitution of Co2+ for Fe3+ and of La3+ for Sr2+ ion in Sr ferrite on the magnetic properties of anisotropic Sr ferrite magnets was investigated. It was found that the coercive force iHc of Sr ferrite magnets is increased without significant decrease in residual flux density Br…
Electrodes consisting of strontium-doped lanthanum manganite (LSM) and gadolinium-doped ceria (GDC) were developed with a modified sol-gel process for honeycomb solid oxide fuel cells based on stabilized zirconia electrolytes. The sol-gel derived cathodes show much lower interfacial polarization resistances than those…
A triphenylene mesogen with the peripheral azobenzene units was found to show kinetically controlled bimesomorphism, with a metastable smectic and a stable hexagonal columnar (Colh) phases on cooling, which is caused by the rod–disc alternation of the molecular shape.
Biofouling and microbiologically influenced corrosion (MIC) are alarming processes of material deterioration. The scenario originates from the attachment of microorganisms as quickly as a material is immersed in a non-sterile environment. Stainless steels, in spite of their wide use in different industries and as appl…
Synthetic and structural studies of europium complexes of calix[8]arene, p-t-Bu-calix[7]arene and p-t-Bu-calix[9]arene are reported. The complex [Eu2(calix[8]arene-6H)(dmso)5] was found to have a similar structure to previously reported p-t-Bu- and p-nitro-calix[8]arene complexes of the lanthanides. Despite being prep…
Transformation of a crystallized molecular solid to a periodically organized covalent extended solid was obtained by a solvent-free process of an organosilane. Hydrolysis and further polycondensation occur in the solid state; in addition this route leads to crystal-like silicon-based hybrid materials with a higher per…
Recent results regarding the formation of co-deposits, fuel accumulation and overall material transport at the TEXTOR tokamak are described. Two categories of brittle flaking co-deposits were identified: ( i ) smooth stratified layers of a thickness of up to 50 µm and a fuel content of up to 16 at.% , ( ii ) granular…
While thymine or N6-(4-methoxybenzoyl)adenine terminated bis(4-alkoxy)-substituted bis(phenylethynyl)benzene monomers show no liquid crystalline behaviour by themselves, mixing the complementary nucleobase monomers together results in the formation of thermotropic liquid crystalline phases.
Fusion-bonded epoxy (FBE) coatings have been in use since 1960 and, as such, are often mistakenly viewed as an established, unchanging technology. Instead, FBE formulations of today are substantially different from their predecessors of even a few years ago. The type of environmental conditions into which coated pipel…