Materials Literature
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ZnS:Mn thin films were deposited on quartz, Si (polycrystalline), and glass substrates using a chemical bath deposition (CBD) method in an aqueous solution containing ethylene diamine tetra acetic acid disodium salt (Na<sub>2</sub>EDTA) as the complexing agent for zinc ions and thioacetamide (TAA) as the s…
The optical and electrical characteristics of pure, sodium- and lithium-doped potassium hydrogen tartrate crystals grown by the gel technique are reported. An optical absorption study conducted in the UV–Vis range of 200–800 nm reveals the transparency of these crystals in the entire visible range but not in the ultra…
Abstract Iron salts have been doped into emeraldine base (EB) successfully using a chemical route. Both FeCl 3 and FeSO 4 were doped separately into EB in acetonitrile with metal ion and tetramer in the ratio of 4 : 1. The doped samples were characterized by UV‐vis absorption, Mössbauer and fourier transform infrared…
Os Neossolos Regolíticos apresentam baixo potencial de uso devido a sua pequena profundidade efetiva, à presença de pedregosidade/rochosidade, ao contato lítico próximo à superfície e à ocorrência frequente em terrenos declivosos. Análises mais detalhadas são necessárias para a melhor interpretação desses solos, visto…
Abstract In this study, corona discharge was applied to optimize the desizing of polyvinyl alcohol (PVA) on cotton fabric. The weight of sized fabric decreased slightly when the PVA sized fabric was treated by corona discharge. Percent desizing rate (PDR) of PVA sized fabric increased evidently after the fabric was su…
A nanocapsule for safe and effective methane storage is investigated by the method of molecular dynamics. The mass content of methane in the nanocapsule reaches the value of 14.5 mass%. The nanocapsule consists of two parts: a locking chamber and a storage area. The locking chamber is the nanotube (10.10), open at one…
Abstract Chitosan (CS) is a biocompatible, biodegradable, and nontoxic polysaccharide polymer. It dissolves in water only if the pH is lower than 6.5. To extend its range of application, many water‐soluble derivatives have, therefore, been prepared. In this research, chitosan‐vitamin C complexes (CSVC) were synthesize…
The Langmuir-Blodgett (LB) technique provides a facile and robust method for the formation of large-area films of various nanoparticles (NPs), including 24.9 nm NaYF(4):Yb,Er nanospheres, 12.0 nm LiYF(4) nanopolyhedra, 14.1 x 1.8 nm triagonal-shaped LaF(3), 12.6 nm square CaF(2), 9.5 x 2.0 nm hexagonal EuF(3), and so…
The crystal structures of the leucite analogues Cs(2)MgSi(5)O(12), Cs(2)ZnSi(5)O(12) and Rb(2)MgSi(5)O(12) have been determined by synchrotron X-ray powder diffraction using Rietveld refinement in conjunction with (29)Si MAS NMR spectroscopy. These leucites are framework structures with distinct tetrahedral sites (T s…
The wood products industry is going through hard times in both Canada and the US. It is faced with competition from emerging economies and substitution products. The North American economy is slowing down with decreasing demand for wood products. Under these conditions, the industry should be innovative and develop th…
Abstract A new conducting polymer was synthesized by electrochemical polymerization of 4‐(2,5‐di‐2‐thiophen‐2‐yl‐pyrrol‐1‐yl)‐phthalonitrile (SNS‐PN). Electrochemical polymerization of SNS‐PN was performed in acetonitrile/0.2 M LiClO 4 solvent/electrolyte couple. Characterizations of the resulting polymer P(SNS‐PN) we…
A simple structured tunable negative refractive index ( n ) metamaterial (TNIM) has been designed, fabricated and tested in a Q-band rectangular waveguide. The structure consists of one slab of single crystalline scandium-doped barium hexaferrite (Sc-BaM), aligned parallel to two rows of periodic copper wires. The mag…
A broad-band three-dimensional (3D) isotropic left-handed metamaterial (LHM) is proposed in this paper. The 3D unit cell is composed of a dielectric cube with metallic Jerusalem crosses on all its six sides. A theoretical model was set up by using equivalent-circuit theory. The magnetic and electric resonant frequenci…
Abstract Phosphomolybdic acid (PMA) is a simple and efficient catalyst for direct coupling reaction of alcohols with allyltrimethylsilane. Direct nucleophilic allylation of alcohol with allyltrimethylsilane proceeds in considerably good yield in the presence of catalytic amount of (0.5 mol %) PMA at room temperature.…
Abstract Carboxy‐polyethylene glycol‐poly(DL‐lactic acid) block copolymer was synthesized by reductive amination of carboxy‐polyethylene glycol‐amine and aldehyde‐ended poly(DL‐lactic acid). The obtained product, PA‐PEG‐CB, composed of pure carboxy‐polyethylene glycol‐poly(DL‐lactic acid) block copolymer and poly(DL‐l…
Abstract To improve the thermal aging flexibility of poly(butylene terephthalate) (PBT), PBT was melt‐blended with three type thermoplastic elastomer [poly ether‐ester type (TPE1), polyester‐ester type (TPE2), and poly(buthylene 2,6‐naphthalate)/poly(tetramethylene glycol) block copolymer type (TPE3)], PBT/poly(ethyle…
Abstract The mass transfer profile (permeability, diffusion, and solubility coefficients) of chlorine dioxide (ClO 2 ), a strong oxidizing agent that is used in food and pharmaceutical packaging, was determined through various common polymeric packaging materials. A continuous system for measuring permeation of ClO 2…
Abstract In this work, surface modification of low density polyethylene (LDPE) film has been carried out to optimize adhesive joints with polyolefin foam for uses in technological applications. LDPE films were modified in a continuous way using corona discharge plasma with different powers, ranging from 200 to 600 W a…
Abstract The second paper of the series devoted to the preparation and characterization of vinyl and hydrido‐functionalized silicones proposes readily available techniques to polymerize commercially available cyclosiloxanes. This study is divided into two main sections: one relies on the synthesis of various functiona…
Abstract The effects of addition of two chemical blowing agents in cellular rubber blend of natural rubber (NR) and styrene‐butadiene rubber (SBR) at a fixed blend ratio of 1 : 1 on cure characteristics, and mechanical and morphological properties were invesigated. The chemical blowing agents used in this work were Ox…