Materials Literature
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Blends of nitrile butadiene rubber (NBR) with butadiene rubber (BR) with varying ratios have been prepared. Vulcanization of prepared blends has been induced by ionizing radiation of gamma rays with varying dose up to 250 kGy. Physical properties, namely soluble fraction and swelling number have been followed up using…
Two series of new unsaturated polyesters were prepared from 2,6‐bis(p‐hydroxidebenzylidene)‐4‐phenylcyclohexanone (I) and 2,6‐divanillyidene‐4‐phenylcyclohexanone (II) with adipoyl, isophthaloyl, sebacoyl and terephthaloyl dichlorides utilizing the interfacial polycondensation technique at ambient temperature. In addi…
In this paper we present an analysis to simulate heating within an isolated carbon nanotube (CNT) attached to an etched tungsten tip during field emission of an electron beam. The length, radius, wall thickness and shape of the tip (closed with a hemispherical shape or open and flat) of the CNT and its separation dist…
We present work on the creation of a ceramic materials database which contains data gleaned from literature data sets as well as new data obtained from combinatorial experiments on the London University Search Instrument. At the time of this writing, the database contains data related to two main groups of materials,…
A single layer consists of CoFe soft and LaCoFeO hard magnetic materials was deposited using the cosputtering method. Microstructure analysis of the layer demonstrated that CoFe particles were surrounded by a LaCoFeO shell and the ratio of the thicknesses was dependent on the amount of La and on the O2∕(Ar+O2) gas flo…
We report a novel one-step method for the preparation of hierarchically patterned Au nanoparticles in a conducting polymer matrix by controlling the interface properties between Au nanoparticles and the conducting polymer matrix. The terminal group of capping molecules for the Au nanoparticles was modified to change t…
Sealed sponge ZnO nanospheres are prepared through a novel NH(3)-evaporation method. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM) and N(2) physisorption analysis show that the samples obtained are ZnO nanospheres with hexagonal wurtz…
Abstract In a plasticized poly(vinyl chloride) formulation of a commercial type, various mixed‐metal oxides of Cu(II) were effective smoke suppressants when used alone and strongly synergistic for smoke suppression when they were combined. Particularly attractive for smoke suppression was a synergistic binary blend of…
Hybrid materials of polyacrylamide networks and gold nanoparticles were prepared by directly heating an aqueous solution containing HAuCl(4), acrylamide, N,N'-methylenebis-acrylamide, and sodium sulfite (Na(2)SO(3)). Acrylamide, N,N'-methylenebis-acrylamide, and Na(2)SO(3) were used as monomers, crosslinking agent, an…
The folylpolyglutamate synthetase (FPGS) enzyme of Escherichia coli differs from that of Lactobacillus casei in having dihydrofolate synthetase activity, which catalyzes the production of dihydrofolate from dihydropteroate. The present study undertook mutagenesis to identify structural elements that are directly respo…
A simple and low-cost method based on a two-step heat treatment of AgNO(3)/SiO(2) film has been developed for fabricating metal Ag nanoring arrays. The as-prepared nanorings have an inner diameter of 70-250 nm and an average wall thickness (namely wire diameter) of approximately 30 nm with a number density of approxim…
Abstract Arabinoxylans from corn cob and oat spelt were studied in sorption experiments onto bleached and unbleached softwood kraft pulp. The corn cob (CC) xylans were produced by steam extraction (SE-CC) and alkaline extraction (NaOH-CC), while the oat spelt xylan (NaOH-OS) was obtained by alkaline extraction. Both a…
A procedure to compute intensity distributions generated by the Mie scattering from a single coated sphere is described, and applied to a nanoshell and a microshell. The obtained information on the near-field intensity and the absorbed energy density is shown to be useful in predicting optical properties of the core-s…
Understanding interactions between colloids (or nanoparticles) immersed in a phase-separating binary mixture is of both fundamental and technological importance. Here we report a novel type of interparticle attractive interaction of a purely dynamic origin, which is found by a coarse-grained numerical simulation. Due…
Abstract The flame‐retardant and smoke‐suppressant properties of inorganic tin compounds such as zinc hydroxystannate (ZHS) and zinc stannate (ZS) were studied in comparison with those of alumina trihydrate and magnesium hydroxide through the limiting oxygen index test and a smoke density test. The thermal degradation…
Plastics used in the packaging industry, especially in the form of carry bags and pouches, manifest a formidable threat to the environment because of their non-biodegradable nature. Addition of both natural and synthetic fibers to these materials improves their performance, replacing the conventional materials like wo…
A novel polychromic phosphor with core-shell heteronanostructure has been prepared to improve the chromatic index of phosphors. As for the first example, Y(2)O(3):Eu(3+)@SiO(2)@YVO(4):Eu(3+), its synthetic route, structure and optical properties are presented in this paper. X-ray diffraction (XRD), field emission scan…
Funktionalisierte Goldnanopartikel mit komplementären H-Brücken bildenden Gruppen können die Sekundärstruktur von Xerogelfasern steuern, die durch einen molekularen Leiter gebildet werden. Möglich wird dies durch ihren Einbau in die Nanodrähte, die, sobald sie dotiert sind, eine metallartige Leitfähigkeit aufweisen, o…
Ein supramolekularer Ansatz überführt Nanopartikel in sphärische Kolloidpartikel mit kristalliner Überstruktur (siehe Bild). Mechanistischen Studien zufolge entstehen diese Partikel in zwei Stufen. Die Triebkraft für die Bildung der „Überpartikel“ ist eine solvophobe Wechselwirkung zwischen den Bausteinen der Nanopart…
Nonstoichiometric synthesis of poly(4,4‘-oxydiphenylene pyromelliteimide) was examined by using reaction-induced crystallization of oligomers during solution polymerization. Polymerizations of pyromellitic dianhydride (PMDA) and 4,4‘-oxydianiline (ODA) were carried out in Barrel Therm 400 at 330 °C at various molar ra…