Materials Literature
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A new soluble conjugated metalloporphyrin polymer has been synthesised as its complex with zinc(II), lead(II) and copper(II) and as the free-base. The zinc complex aggregates in non-coordinating solvents, due to coordination of the amide side-chains to the zinc centres. These aggregates dissociate on addition of pyrid…
Layered lanthanide tantalates and their ion-exchanged phases (MLnTa2O7, M = Cs, Rb, Na, and H; Ln = La, Pr, Nd, and Sm) were prepared to evaluate their photocatalytic activity for water splitting under UV irradiation. The optical band gap energy was dependent on the lanthanide, Ln, but negligibly affected by the monov…
A dense 3‐mol%‐yttria‐stabilized tetragonal zirconia polycrystalline (3Y‐TZP) toughening alumina matrix nanocomposite with a nanocrystalline (<100 nm) matrix grain size has been successfully developed by a novel processing method. A combination of very rapid sintering at a heating rate of 500°C/min and at a sinteri…
It was found that the introduction of a perfluoroalkyl group into the peripheral chains of triphenylene mesogens could provide a strong tendency towards homeotropic alignment of the hexagonal columnar (Colh) mesophase on a variety of substrates, indicating a new concept of molecular methodology for the alignment contr…
Single crystalline BaTi2O5 was prepared by a floating zone method. The single crystal was transparent having a (001) cleavage plane. The space group was C2, and the lattice parameters were a=1.6909(9) nm, b=0.3937(1) nm, c=0.9419(4) nm and β=103.12(6)°. The permittivity perpendicular to a (010) plane showed the maximu…
Since the discovery of discotic liquid crystals in 1977 [1] the field has grown rapidly with an estimated 3000 compounds belonging to this category. Generally these compounds have flat or nearly flat cores and surrounded by four to eight long chain substituents. A vast majority of these compounds exhibit the columnar…
Manganese oxide (MnOx) xerogel and ambigel films were investigated as ultracapacitor electrodes in unbuffered aqueous electrolytes. These nanostructured, mesoporous gels, derived from the sol-gel reaction of NaMnO 4 ⋅ H 2 O and fumaric acid, were cast as continuous thin films on indium-tin oxide glass. Further process…
The antimicrobial activity of chitosan with different molecular weights (MWs) and different degrees of acetylation (DA) was examined to clarify how the activity depends upon the molecular structures. We determined minimum growth inhibitory concentrations (MICs) of various types of chitosan in L broth or its modified m…
To use wool successfully in technical applications requires a high-value application that can exploit its natural properties, a reduction in costs, or modifying the fibre to achieve a particular target performance. Wool is increasingly being used in technical applications in which its unique properties and the opportu…
A kind of synthesized thermotropic liquid crystal copolyester containing phosphorus (PLCP) with high flame retardancy (oxygen index, 70%) has been used to prepare in situ reinforced PET composites that have both good flame retardancy and better mechanical properties than pure PET. The melt dripping behavior of PET was…
Abstract The effect of NO and SO 2 on the oxidation of a COH 2 mixture was studied in a jet‐stirred reactor at atmospheric pressure and for various equivalence ratios (0.1, 1, and 2) and initial concentrations of NO and SO 2 (0–5000 ppm). The experiments were performed at fixed residence time and variable temperature…
Films of γ-aminopropyltriethoxysilane (γ-APS), 1,2-bis[triethoxysilyl] ethane (BTSE) and their mixtures adsorbed onto pure aluminum from aqueous solutions were characterized by means of ellipsometry, infrared spectroscopy (IR) and X-ray photoelectron spectroscopy (XPS). It was found that after hydrolysis in water the…
Nanocrystalline tetragonal‐BaTiO 3 powder was prepared using a hydrothermal method, under moderate conditions, and with a high precursor concentration. Characterization via X‐ray diffractometry and differential scanning calorimetry confirmed that the average particle size and tetragonal content of the prepared powder…
An electrochemical procedure is described for the anodic deposition of CuO thin films from solution precursors at 25-30°C in an alkaline medium The deposition bath was similar to Fehling's solution using tartrate ions as a complexing agent for Cu(II). Cupric oxide deposited onto a platinum substrate at an anodic curre…
Novel long-period hexagonal structures with six and fourteen layered atomic configurations were formed in melt-spun Mg97Ln2Zn1 (Ln=Y, Gd and Sm) ternary alloys annealed at 573 K for 1.2-3.6 ks and in an as-spun Mg97Y2Zn1 alloy, respectively. The Mg-based alloys containing La or Ce as the Ln element have a mixed struct…
It is well established that near-infrared (NIR) combination bands at 4500 and 5200 cm−1 can be used to measure the concentrations of OH groups and H2O molecules, respectively, in hydrous silicate glasses at room temperature. However, the variations of hydrous species concentrations and molar absorption coefficients fo…
Practical applications of wood based composites are limited by the hydrophilic nature of cellulose, which causes dispersion and moisture absorption problems. This work rests on the effects of wood treatment on the mechanical properties of composites made with wood flour and polypropylene (WF/PP). Two different fiber t…
Potentiostatic polarization experiments were performed as a function of potential (200 to 700 mV Ag / AgCl ) and temperature (25-85°C) on the Ni-Cr-Mo alloys C22 and C276. X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (TOF SIMS) were used to determine the chemical compositio…
Molybdenum(VI)–cis-dioxo complexes bearing sugar derived chiral Schiff-base ligands of general formula MoO2(L)(Solv) have been synthesized (with L = N-salicylidene-D-glucosamine; N-salicylidene-1,3,4,6-tetraacetyl-α-D-glucosamine; N-5-chlorosalicylaldehyde-1,3,4,6-tetraacetyl-α-D-glucosamine; N-salicylaldehyde-1,3,4,6…
Poly (vinyl alcohol)-chitosan blend films were prepared by casting the respective polymer solutions. The glutaraldehyde was used as a cross-linking agent. A series of PVA-chitosan blends were prepared by varying the ratio of the constituents. Mechanical and physical properties of blended films such as tensile properti…