Materials Literature
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ABSTRACT The in situ polymerization of aniline monomers within kaolinite interlayers easily led to an intercalated polyaniline (PANI)–kaolinite nanocomposite through a facile mechanochemical method. The X‐ray diffraction results demonstrate that PANI was successfully intercalated in the interlayers of kaolinite, which…
In industrial-scale catalytic olefin copolymerization processes, catalyst and cocatalyst precontacting before being introduced in the polymerization reactor is of profound significance in terms of catalyst kinetics and morphology control. The precontacting process takes place under either well-mixing (e.g., static mix…
Proteins and peptides have attracted much attention as templates for one-pot synthesis of biocompatible gold nanoparticles. While numerous natural and de novo protein sequences have been used, the actual mechanism of nanoparticle nucleation and growth from the protein matrix is not well understood. In this study we ut…
Hydrothermally grown n-type ZnO bulk samples have been implanted with protons and deuterium ions to fluences in the range of 8 × 1010 to 8 × 1011 cm−2. The implantations were performed at the temperature of 285 K, and the samples were then analyzed in-situ by deep level transient spectroscopy (DLTS) using a setup conn…
Polypyrrole (PPy) aerogel is a low-cost and lightweight material with high-performance electromagnetic absorption (EA). However, it does not always meet the requirements of practical applications. In this study, we used trace amounts of carboxyl multiwalled carbon nanotubes to regulate the dielectric property of PPy a…
The release of hydrogen halides in Friedel–Crafts alkylation has long been considered as troublesome and detrimental. Here we demonstrate that the released HCl in alkylation is beneficial and highly demanded to remove poly(ethylene oxide)- b -poly(propylene oxide)- b -poly(ethylene oxide) templates from the phenolic s…
Roughness of textiles and garments is an important parameter influencing consumer choice. This work considers the effect of applying a polyurethane coating on the surface roughness of woven polymer fabrics. A number of different process parameters were tested, including curing temperature, gap spacing, coating speed a…
Abstract The effects of homogenization and isothermal aging treatment on the mechanical properties of Mg–12Gd–2Er–1Zn–0.6Zr (wt%) alloy were investigated. The precipitated long‐period stacking order (LPSO) structure and the aging precipitation sequence of the conditioned alloys were observed and analyzed, respectively…
We present continuous modelling at inter-atomic scale of a high-angle symmetric tilt boundary in forsterite. The model is grounded in periodic arrays of dislocation and disclination dipoles built on information gathered from discrete atomistic configurations generated by molecular dynamics simulations. The displacemen…
Abstract The catalytic effects of ZrC powder on the dehydrogenation properties of LiAlH 4 prepared by designed mixing processes were systematically investigated. The onset dehydrogenation temperatures for the 10 mol% ZrC‐doped sample are 85.3 and 148.4 °C for the first two dehydrogenation stages, decreasing by 90.7 an…
The (Na0.5Bi0.5)1-xBaxTiO3 (x = 0, 0.08 and 0.09) ceramics are fabricated by a conventional solid phase sintering process. X-ray diffraction analysis and Raman spectra show that the specimens possess perovskite structure with rhombohedral (for x = 0) and tetragonal (for x = 0.08 and 0.09) symmetry at room temperature.…
In order to visualize the 2D spatial distribution of the structural change in the phase transition from crystal form II to I of isotactic polybutene-1 spherulite grown from the melt, the time-dependent measurement of the 2D polarized FTIR spectra has been performed. At a melt-isothermal crystallization temperature of…
PURPOSE/OBJECTIVE: The aim of this study was to develop and investigate the properties of a magnetic iron oxide nanoparticle-ethiodised oil formulation for image-guided thermal therapy of liver cancer. MATERIALS AND METHODS: The formulation comprises bionised nano-ferrite (BNF) nanoparticles suspended in ethiodised oi…
This paper introduces a three-phase reversible transformer model for the study of low-frequency transients. The model topology is obtained from the direct application of the principle of duality by drawing basic circuit elements on top of the transformer frame. The model parameters are obtained from terminal and physi…
Fossil-based and true bio-based poly(butylene succinate) (PBS) prepolymers were synthesized and submitted to solid-state polymerization (SSP) in the proximity of the polyester melting point ( T m ), for reaction times up to 29 h under flowing nitrogen. SSP acted as a postcrystallization process, imparting an increase…
We study the effect of a nonmagnetic impurity inserted in a two-dimensional frustrated ferromagnet above its saturation magnetic field ${H}_{\mathrm{sat}}$ for arbitrary spin $S$. We demonstrate that the ground state includes a magnetic vortex that is nucleated around the impurity over a finite range of magnetic field…
Abstract A series of novel red‐emitting Sm 3 + ‐doped bismuth silicate phosphors, Bi 4 Si 3 O 12 :xSm 3 + (0.01 ≤ x ≤ 0.06), were prepared via the sol–gel route. The phase of the synthesized samples calcinated at 800 °C is isostructural with Bi 4 Si 3 O 12 according to X‐ray diffraction results. Under excitation with…
An efficient approach was employed to simultaneously functionalize and reduce the graphene oxide (GO) with p-phenylene diamine (PPD) using simple refluxing. There was a possibility of nucleophilic substitution of amino moieties of PPD with the epoxy groups of GO. The polythiophene (PTh) and polythiophene-co-poly(methy…
ABSTRACT In this work, titanium nitride (TiN) nanoparticles were employed to achieve enhanced thermal insulation and flame retardance of phenolic foam (PF)/TiN nanocomposites (PFTNs) via in situ polymerization. The morphologies of PFTNs were observed by scanning electron microscope and the images showed that the PFTNs…
Kinetic parameters are reported for the reactions of whole substrates (kcat/Km, M(-1) s(-1)) (R)-glyceraldehyde 3-phosphate (GAP) and dihydroxyacetone phosphate (DHAP) and for the substrate pieces [(kcat/Km)E·HPi/Kd, M(-2) s(-1)] glycolaldehyde (GA) and phosphite dianion (HPi) catalyzed by the I172A/L232A mutant of tr…