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。
The effects of surface treatment of paper sludge (PS) with acrylic acid (esterification) and acetic acid (acetylation) on torque, stabilization torque, mechanical properties, water absorption, morphology, and thermal properties of PP/EPDM/PS composites were studied. It was found that esterified and acetylated composit…
A series of liquid crystalline mixtures that exhibit remarkably stable 4-layer intermediate phases, with phase ranges of around 30 °C, are reported. The mixtures are formed from a selenium-containing antiferroelectric material combined with up to 9% (by weight) of a highly chiral dopant. Various experimental methods i…
Polyaniline was synthesized chemically, coated on sawdust via cast method in the form of emeraldine base (EB) from formic acid as solvent, and used as an adsorbent for removal of lead ion or from aqueous solution. The effects of some important chemical and physical factors in removal efficiency have also been investig…
A simple model has been developed (within the framework of the point defect model, PDM) assuming that the impedance response of passivated metals is dominated by the barrier layer, which consists of a partly hydrated and highly defective oxide layer. Simulations were carried out for cation vacancy conducting barrier l…
Abstract For the first time, the use of epoxy resins for the immobilisation of catalytically active metal species is reported. The resins were cured using metal acetylacetonates and alkoxides as polymerisation initiators and the thus obtained thermosets were tested as epoxidation catalysts. Outstanding long‐term catal…
Upon UV irradiation of the hydrogen-bond confined crystal state of a dithienylhexafluorocyclopentene with (R)-N-phenylethylamide substituents, the photochemical cyclization reaction proceeds diastereoselectively to form the coloured, closed-ring isomer with 97% de.
Boron dipyrromethene dyes bearing nitro, amino, isocyanate and isothiocyanate functions were readily prepared under mild conditions. Various combinations allow to produce urea, diurea, thiourea, dithiourea in the 3, 4 and 5-substitution positions of the appended phenyl group. Condensation of the 3,4-substituted diamin…
We designed and analysed a new structure for the realization of left-handed metamaterials in the GHz region. The material is composed of pairs of metallic crosses and reveals improved polarization behaviour. Left-handed properties can be observed as long as the electrical field vector is located in the plane of the cr…
Large thickness is required in holographic recording materials to be used as holographic memories. Photopolymers have proved to be a good alternative to construct holographic memories. Nevertheless, modeling the behavior of thick layers poses some problems due to high absorption of the dye, as discussed in previous pa…
The aim of this study was to examine the feasibility of using a new low-modulus biodegradable thermoplastic elastomer for in vivo application as a stent cover. The new polymer, a thermoplastic elastomer, consists of a three-armed co-polymer of poly(lactide)acid (PLLA), poly(trimethylene carbonate) (PTMC) and poly(capr…
Microstrip antennas with left-handed materials substrates are studied with method of moments. Discrete complex image method is extended to the computation of Green's function in microstrip circuits with left-handed materials substrates. It's shown that this new kind of antennas will get similar radiation patterns to t…
A numerical model using a modified front tracking technique has been developed to simulate dendrite growth during the solidification of binary alloys. Diffusion in liquid and solid, mass conservation at the solid/liquid interface and local equilibrium at the solid/liquid interface with consideration of curvature under…
PVP-capped silver spherical nanoparticles and nanorods serve as active catalysts for the polymerization of alkylsilane C18H37SiH3 with water, to form flower petal-like composite siloxane microspheres.
A novel liquid crystal (LC) photoalignment method, based on a super thin azo dye molecular layer is proposed. The basic idea of this method is to form a very neat textile knitwear and uniform alignment by azo dye layer without spin coating and rubbing processes. The thickness of the alignment layer is smaller than 3 n…
Abstract Polarized Raman spectra of a single crystal of gadolinium molybdate, Gd 2 (MoO 4 ) 3 were obtained between 400 and 80 K. Tentative assignments of high‐wavenumber bands of symmetric and antisymmetric MoO 4 stretching modes to the three types of tetrahedra present in the ferroelectric phase described by the C 2…
We studied the thermoelectric and thermophysical properties of Cu2Te-Tl2Te pseudo binary system. Polycrystalline samples of CuTl9Te5, Cu2Te and Tl2Te were prepared and characterized. All samples indicated positive values of the Seebeck coefficient and very low values of the thermal conductivity. The values of the ther…
Commercial grade poly(vinyl alcohol) (PVA) is widely used in adhesive and textile industries. The density and viscosity of an aqueous PVA solution are important properties in the various processing stages in these industries. In this work, the density and viscosity of aqueous PVA solutions are measured and the average…
Mesoporous intermetallic Pt–Ni alloys with various compositions have been produced by the chemical reduction of two metal (nickel and platinum) salts dissolved in aqueous domains of a lyotropic liquid crystalline (LLC) phase. The mesoporous Pt–Ni alloys are small particles less than 100 nm in size and exhibit high spe…
The mechanisms by which hydrogen degrades the mechanical properties of materials are reviewed. Specific research directions to increase our understanding on the fundamentals of the hydrogen effect and establish a fracture prediction methodology are identified.
Advanced High Strength (AHS) steels, among them especially Dual Phase (DP) steels, Transformation Induced Plasticity (TRIP) steels, Complex Phase (CP) steels, Partially Martensite (PM) steels, feature promising results in the field. Their extraordinary mechanical properties can be tailored and adjusted by alloying and…