Materials Literature
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The two main methods of removing salt from ocean water currently in use for large scale applications are: distillation using thermal desalination and membrane reverse osmosis separation. A detailed knowledge of the CO2 solubility in the seawater at the conditions prevailing in the system is required for the modeling o…
Abstract Novel thermosetting composites have been successfully developed using glass fibers to reinforce regular corn oil (COR) and conjugated corn oil (CCOR) resins prepared by cationic copolymerization with styrene (ST) and divinylbenzene (DVB). The dependence of morphology and physical properties of the composites…
Abstract Blending of microbial polyester poly(3‐hydroxybutyrate) (PHB) with various dendritic polyester oligomers or dendrimers was achieved by solution casting to improve the film forming ability of PHB. Films of the blends were characterized by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA…
Abstract Effects of nanoparticle surface treatment on the crystallization behavior and mechanical properties of polypropylene (PP)/CaCO 3 nanocomposites were investigated by using differential scanning calorimetry (DSC), polarized optical microscope (POM), X‐ray diffraction (XRD), transmission electron microscopy (TEM…
Abstract Skim natural rubber latex (SNRL) is a protein rich by‐product obtained during the centrifugal concentration of natural rubber (NR) latex. A new method to recover rubber hydrocarbon and to obtain nanocomposites with organoclay (OC) was investigated. The approach involved treatment of SNRL with alkali and surfa…
A novel nano-biocomposite of silver and poly(o-methoxy aniline) (POMA)/DNA hybrid has been prepared by adding DNA solution to an aqueous solution of POMA (emeraldine base, EB) and AgNO(3) mixture. The mixture was aged for 10 days and was freeze-dried to form the hybrid nanocomposite (weight fraction of DNA = 0.75). FE…
In the present work we investigated the photoluminescence property of silicon nanocrystals in silicon nitride prepared by ammonia sputtering. Silicon nanocrystals were demonstrated to form even after thermal annealing at 700 °C. Compared with the control sample using N(2) as the reactive gas, the luminescence intensit…
Abstract The purpose of these studies was to evaluate chitosan films impregnated with silver sulfadiazine as potential wound dressings, based on their mechanical properties and the controlled‐release phenomenon. The mechanical properties of such films were investigated under varying plasticizers (glycerol or sorbitol)…
Abstract Various methods of preparation of epoxy resin/clay mixtures, before the addition of the crosslinking agent and curing to form epoxy‐based polymer layered silicate (PLS) nanocomposites, have been investigated to determine their effect on the nanostructure. Organically modified montmorillonite clay was used, an…
Abstract The influence of nanoclay particles on the nonisothermal crystallization behavior of intercalated polyethylene (PE) prepared by melt‐compounding was investigated. It is observed that the crystallization peak temperature ( T p ) of PE/clay nanocomposites is slightly but consistently higher than the neat PE at…
Molecular-scale kinetics of calcium oxalate growth inhibition in the presence of citrate has been investigated using in situ AFM (see lower microstructure image). Theoretical analysis of the data shows that the classic Cabrera–Vermilyea model of step pinning correctly predicts calcium oxalate monohydrate step kinetics…
Abstract Composites of different lignocellulosic materials and high‐density polyethylene were prepared and their long‐term water absorption behaviors were studied. Wood flour, rice hulls, newsprint fibers, and kenaf fibers were mixed with the polymer at 25 and 50 wt % fiber contents and 1 and 2% compatibilizer, respec…
Abstract Poly(vinyl alcohol) (PVA) composites with 10, 20, 33, and 50 wt % of coconut shell (CCS) powder were prepared by aqueous mixing. The solution was casted as films and tested for physicomechanical properties such as tensile, tear, burst strengths, density, moisture content, moisture vapor transmission rate, moi…
Abstract PLLA, PDLLA, and PLGA copolymers have been studied to understand the details of their degradation behavior. All polymers exhibited a homogeneous mode of degradation, with uniform rates of degradation throughout the film. Crystallinity inhibited water absorption and hence retarded degradation. The degradation…
A versatile synthetic method has been developed to incorporate photochromic azobenzene moieties into tetraphenylporphyrin frameworks in an orthogonal fashion, positioning the phenylazo substituents above and below the plane of the macrocycle. Surprisingly, photoisomerization is completely suppressed in the resulting a…
Abstract Raman spectra of eight polycrystalline apatites of the general formula La 10− x Si 6− y M′ y O 26 ± δ with M′ = Al or Fe were obtained at 300 K. Raman spectra of La 10 Si 4 Fe 2 O 26 and La 9.83 Si 4.5 Al 1.5 O 26 were investigated in the range 80–1000 K and 80–623 K, respectively. Tentative assignments of ba…
Organic ligands containing the chelating carbodithioate group are excellent candidates for the surface functionalization of various semiconductor and metal nanoparticles or flat substrates. We provide a simple synthetic scheme for the preparation of a series of regioregular oligo- and polythiophenes containing this fu…
In this article a detailed study of the optical properties of lanthanide doped lamellar nanohybrids synthesized by the "benzyl alcohol route" is presented. The synthetic approach results in the formation of a highly ordered lamellar nanocomposite consisting of yttrium or gadolinium oxide crystalline layers with a conf…
Aluminium alloys of the AA7xxx series can have very high strength but are generally susceptible to localised corrosion. In the present study, the localised corrosion kinetics for different plates of AA7xxx-T6 were investigated in different orientations, using the foil penetration method. Multiple breakdown potentials…
Abstract In this work, we report the low‐temperature phase transition of sodium niobate (NaNbO 3 ) ceramics at the antiferroelectric–ferroelectric phase studied by the Raman scattering technique over the temperature range 10–300 K. The spectral shape indicates that the phase transition occurs at 160 K on the cooling c…