Materials Literature
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Lead zirconate titanate (PZT) films were fabricated on Pt/Ti/<TEX>$SiO_2$</TEX>/Si substrate by the sol-gel method using a sol containing poly(N-vinylpyrrolidone) (PVP). PVP in alkoxide solutions can suppress the condensation reaction in gel films during heat treatment, and increase the viscosity of alkoxide solutions…
With the aim of improving the hemocompatibility of blood‐contacting devices, antithrombotic or fibrinolytic biological molecules‐containing polyurethane (PU) materials have been developed. Cationic PU surfaces were prepared by grafting poly(dimethylaminoethyl methacrylate) and quaternizing the tertiary amino groups wi…
We modified the optical properties of the <TEX>$CuInS_2$</TEX> nanocrystal (NC) by alloying. Nanocrystals (NCs) with alloyed cores were synthesized by refluxing the as-synthesized <TEX>$CuInS_2$</TEX> NCs with a mixture of cadmium acetate, zinc acetate and palmitic acid. The shift in emission wavelength of the NCs aft…
The direct hydration of camphene to isoborneol has been studied in the presence of strong acidic cation exchange resins as catalyst. The effect of various parameters such as temperature, catalyst loading, mass ratio of the reactants, and reaction time on the conversion of camphene was investigated to optimize the reac…
This historical review covers the development of the basic tools used in soil chemistry, mostly from the 1800s to the present, seeking to highlight significant changes in the way we pursue our research and describe the source of some of the tools we use. Eight topics are covered. The review starts with the beginnings…
The new mineral windhoekite was discovered in a specimen from the Ariskop Quarry, near Windhoek, Namibia. Associated minerals are fluorapophyllite, aegirine, microcline, arisite-(Ce), arisite-(La). Windhoekite is yellow-brown, translucent; streak is beige. It forms isolated long-prismatic crystals up to 0.15 × 4 mm an…
Continuous-flow synthesis of one-dimensional (1D) metal oxide nanostructures and/or their integration into hierarchical structures under nonthermal conditions is still a challenge. In this work, a nonthermal, continuous-flow approach for the preparation of γ-manganese oxide (γ-MnO 2 ) and cerium oxide (CeO 2 ) microsp…
Abstract In the present study, glycidyl methacrylate (GMA) grafted medium density polyethylene (MDPE‐ g ‐GMA) was synthesized in the molten state and applied as a reactive compatibilizer in MDPE/polyamid6 (PA6) and in MDPE/poly(ethylene terephtalate) (PET) blends. Graft copolymerization of GMA onto MDPE was performed…
The effects of magnetostrictive particle distribution on magnetoelectric (ME) properties were investigated in a 3–0 ME composite made of piezoelectric [0.9Pb(Zr 0.52 Ti 0.48 )O 3 –0.1Pb(Zn 1/3 Nb 2/3 )O 3 + 0.005Mn; PZT–PZN] and 20 wt % magnetostrictive (Ni 0.8 Zn 0.2 Fe 2 O 4 ; NZF) materials. X-ray diffraction (XRD)…
Abstract Poly( N ‐vinylpyrrolidone) (PVP) groups were grafted onto poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate) (PHBV) backbone to modify the properties of PHBV and synthesize a new novel biocompatible graft copolymer. Based on these graft copolymers, electrospun fiber mats and commonly cast films were explored as d…
Abstract Novel asymmetric composite scaffolds of chitosan superfine powder (CSP) and biomedical polyurethane (BPU) were prepared by an immersion‐precipitation phase inversion method. Effects of polyvinylpyrrolidone (PVP) as a pore‐forming agent on the structure and performance of the CSP/BPU composite scaffolds were i…
Initially isolated from Pd(10)(CO)(12)(PEt(3))(6) (5) and Au(SMe(2))Cl precursors in a two-step carbon monoxide (CO)-involved procedure, the nanosized interpenetrating bicuboctahedral gold (Au)-palladium (Pd) Au(2)Pd(28)(CO)(26)(PEt(3))(10) (1) was then directly obtained in 25-30% yield from the CO-induced reaction of…
Abstract This work aims to investigate the electrical conductivity sensitivity of polydiphenylamine (PDPA) pellets, films, and fibers when they are exposed to methanol vapor. PDPA was synthesized via chemical oxidative polymerization and washed with NH 4 OH solution to obtain the de‐doped‐PDPA (De‐PDPA). De‐PDPA pelle…
Polymer nanocrystals have attracted considerable attention because of their potential applications in future technology and their fascinating properties which differ from those of corresponding bulk materials. The essential influence of the nanointerface in nanocrystals is apparent in the linear dependence of the melt…
Magnetic Co-beads were fabricated in the course of a three-step procedure comprising preparation of a metal–acrylamide complex, followed by frontal polymerization and finally pyrolysis of the polymer. The composites obtained were composed of cobalt nanocrystallites stabilized in a carbon matrix built of disordered gra…
The agroenvironmental impact of co-utilization of red gypsum and sewage sludge was investigated. Both laboratory and greenhouse studies were conducted. The treatments were soil + sewage sludge (5% w/w) + red gypsum (0, 2.5, 5, 10, 20, and 40%, w/w). Corn was grown in the greenhouse, and the highest rate of red gypsum…
Contact angle measurements, using the dynamic contact angle and Washburn methods, were taken for 100% aramid and viscose fabrics, as well as for 50:50 aramid and viscose mixed fabrics of different structure. Based on the measurements of contact angles wetted with hexane, water and formamide, the fabric surface free en…
Summary Calcium sulfate is one of the major mineral scales in oil and gas production. Hemihydrate (CaSO4·0.5H2O) and anhydrite (CaSO4) are the predominant sulfate scales formed at high temperature, while gypsum (CaSO4·2H2O) scale may form at low temperatures (&lt;~45°C). However, it has been shown in this study th…
Structural, magnetic, and powder and single-crystal electron paramagnetic resonance (EPR) studies were performed on [{Cu(bipy)(en)}{Cu(bipy)(H(2)O)}{VO(3)}(4)](n) (bipy = 2,2'-bipyridine, en = ethylenediamine), which is a new copper-vanadium hybrid organic-inorganic compound containing Cu(II) and V(V) centers. The oxo…
Polyoxalate and copolyoxalate were developed in the 1970s and have been used for biomedical applications such as suture coating purposes, owing to their biocompatibility and biodegradability. They are known to degrade into diols and oxalic acid, which are considered biocompatible. One of the advantages of oxalate-base…