Materials Literature
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A mexican bentonite was used to prepare three modified clays: an organoclay (OC–CPC) by intercalating cetylpyridinium chloride (CPC), an aluminum-pillared clay (Al-PILC), and an inorganic–organic clay (IOC–CPC) prepared from Al-PILC intercalating CPC. The infrared and thermogravimetric analyses enabled us to different…
A mesoporous Pd(II) organometallic catalyst is synthesized by coordinating the Pd(II) with the amine-ligand anchored on ethyl-bridged PMOs. During Barbier reaction in water as an environmentally friendly medium, the as-prepared Pd(II)-PMOs (Et) exhibits matchable catalytic activity and selectivity with the correspondi…
The impact of tailor-made inhibitors, that is, additives with horizontal and downward bonds similar to the growth units but with weaker or repelling bonds upward, on the growth and etching of crystals is studied. Kinetic Monte Carlo simulations applied to the {001} face of the solid-on-solid Kossel crystal are used. F…
An analytical expression is presented for the susceptibility of liquid cast iron to solidify according to the Fe-C-X metastable system (also known as the chilling tendency of cast iron, CT). The analysis incorporates the nucleation and growth processes associated with the eutectic transformation. The CT is related to…
Blends of Linear low density polyethylene (LLDPE) and Poly dimethyl siloxane rubber (PDMS) are immiscible due to dissimilarity in their structures and wide difference in their surface energies. The processing parameters such as temperature, rotor speed and time in an internal mixer (Brabender Plasticorder) were optimi…
The objective of this work was to investigate the effect of elastomer polarity on phase structure and mechanical properties of PP nanocomposites. The nonpolar and polar elastomers studied were polyethylene octene (POE) and polyethylene octene grafted maleic anhydride (POEgMAH), respectively. The results from mechanica…
Here we present a comparative analysis of two types of equally monodisperse gold nanoparticles (∼8 nm in diameter), one coated only with dodecanethiol ligands and the other coated with a mixture of dodecanethiol and 4-methylbenzenethiol ligands. The former particles (‘homoligand') have a homogeneous coating, while the…
Magnesium oxide (MgO) nanoparticles were prepared using sol–gel process. The nanoparticles were then dried using a supercritical drying process. The particles were characterized for surface morphology, crystal structure, and surface functionality. The nanoparticles show a coralline structure with an average particle s…
In this communication, an interesting effect of mechanically refined cellulosic fiber, obtained from simple commercially available writing paper, has been studied on the foaming reactions of polyurethane based on polyol derived from soy bean oil. Presence of refined cellulosic paper fiber has been observed to have a c…
The adsorption of a single multiblock AB copolymer on a solid planar substrate is investigated by means of computer simulations and scaling analysis. It is shown that the problem can be mapped onto an effective homopolymer adsorption problem. In particular, we discuss how the critical adsorption energy and the fractio…
The influence of sustained and cyclic loading on the crack growth behavior of a multilayered alumina–zirconia composite exhibiting high internal compressive stresses is investigated. The study was conducted on precracked notched samples and focused on evaluating the static and cyclic fatigue resistance to crack extens…
Abstract Light provides practical and versatile tools for structure formation and its tuning of soft materials. This article briefly overviews recent developments of photoalignment and phototuning of nanostructured materials focusing onto the 2D material systems. Two topics are involved; i) phototuning and alignment o…
The dispersion of electron-deficient ferrocenium ions was studied in the electron-rich media of two different triphenylene-based columnar hexagonal liquid-crystalline phases. These composites were characterized using polarizing optical micrography (POM), differential scanning calorimetry (DSC), small-angle X-ray scatt…
Slow evaporation of aqueous solutions containing mixtures of Na 2[Os(phen)(CN) 4], Ln(III) salts (Ln = Pr, Nd, Gd, Er, Yb), and (in some cases) an additional ligand such as 1,10-phenanthroline (phen) or 2,2'-bipyrimidine (bpym) afforded crystalline coordination networks in which the [Os(phen)(CN) 4] (2-) anions are co…
Carbon nanotubes have gained significant attention as nanocapsules for targeted drug delivery, and recently the behaviour of drugs when encapsulated into carbon nanotubes has been investigated by the present authors. However, there are many other materials which may possibly be more biocompatible or biodegradable and…
The thermal degradation behavior of poly(ε-caprolactone) (PCL) in nitrogen atmosphere was investigated by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) techniques and Fourier Transform Infrared (FTIR) spectroscopy. TGA/DTG/DSC curves display only one main degradation step. TGA/FTIR results…
The photophysical properties of a series of 1,8-naphthalimide photoacid generators were studied by steady state fluorescence and phosphorescence spectroscopy. Emission and excitation anisotropies, triplet quantum yields in polar and nonpolar solvent and photoacid generation were evaluated. The singlet excited state ex…
Fatty acid amides, such as n-lauroyl-L-alanine, gelate both aliphatic and aromatic hydrocarbon solvents efficiently. In addition this compound is found to gelate the binary solvent mixtures comprised of aromatic hydrocarbon, e.g., toluene and aliphatic hydrocarbons, e.g., n-heptane. Scanning electron microscopy and at…
Flexural creep of ZrB 2 /0–50 vol% SiC ceramics was characterized in oxidizing atmosphere as a function of temperature (1200°–1500°C), stress (30–180 MPa), and SiC particle size (2 and 10 μm). Creep behavior showed strong dependence on SiC content and particle size, temperature and stress. The rate of creep increased…
The authors report on a new method for the synthesis of graphene, a mono-layer of carbon atoms arranged in a honey comb lattice, and the assessment of the properties of obtained graphene layers using micro-Raman characterisation. Graphene was produced by a high pressure–high temperature (HPHT) growth process from the…