Materials Literature
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A process model for the crystallization of L-phenylalanine crystals from mixed propanol–water solution, an enantiotropic system, is developed with nucleation and growth kinetics estimated for the anhydrate and monohydrate forms using in situATR-FTIR spectroscopy and laser backscattering. A challenging aspect of estima…
In the present work, chemical modification of the sugarcane bagasse fibers by estherification through anhydride system was studied to use as reinforcement in polyester matrix. Sugarcane bagasse fibers were estherified during 5 hours with acetic anhydride, toluene, acetic acid and percloric acid. The modification the f…
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Oxidative aromatic coupling of meso-substituted porphyrins bearing one electron-rich naphthalene unit has been studied in detail. After thorough optimization of oxidant, naphthalene-fused porphyrins were prepared in high yield without contamination from chlorinated side-products using Fe(ClO(4))(3)·2H(2)O. Copper and…
Platinum nanoparticles have industrial application, for example in catalysis, and are used in consumer products such as cosmetics and supplements. Therefore, among the many nanoparticles, platinum is one of the more accessible nanoparticles for consumers. Most platinum nanoparticles that are used in cosmetics and supp…
Polyaniline-fly ash (PANI-FA) composites were prepared by oxidative polymerization of aniline with fly ash in presence of ammonium persulphate (APS). The PANI-FA composites were prepared with different concentrations of fly ash to aniline ratio. The composites, so prepared, were characterized by UV-vis spectroscopy, F…
The preparation of polymer blends of poly (lactic acid) (PLA), Poly(butylene-succinate-co-adipate)(PBSA) and poly)butylene adipate-co-terephthalate((PBAT) were studied with the objectives to apply to blown film extrusion method. The blends were prepared using twin-screw extruder. The ratio of PLA and PBSA was fixed at…
Ba1−xDyxTi1−xScxO3 ceramics, 0 ≤ x ≤ 0.075, were prepared and the influence of Dy and Sc co-doping on the ferroelectric, electrical and structural properties of BaTiO3 (BT) investigated. A solid solution limit of x ≈ 0.05 was established using X-ray diffraction, and all compositions x ≤ 0.05 were tetragonal at room te…
Tautomerism process of single fluorescent molecules was studied by means of confocal microscopy in combination with azimuthally or radially polarized laser beams. During a tautomerism process the transition dipole moment (TDM) of a molecule changes its orientation which can be visualized by the fluorescence excitation…
Abstract This research work presents a study of the combined influence of the partial pressure of hydrogen sulfide (H2S) and the concentration of free acetic acid (CH3COOH) on the general and localized carbon dioxide (CO2) corrosion at the bottom of the line. Experiments were carried out for up to 21 days in three 4-i…
The last two decades have witnessed an exponential growth of investigations into the application of nanomaterials for drug delivery. A majority of these investigations have focused on either passive or controlled or targeted drug delivery. However, a combination of these attributes and, most importantly, spatiotempora…
The effects of Zr addition on the microstructure and magnetic properties of the sintered NdFeB magnets were investigated by X-ray diffraction (XRD) and BH magnetic tester. The XRD analysis showed that both the Zr-free and Zr-doped samples are composed of main amount of Tetragonal phase Nd2Fe14B (P42/mnm) and trace amo…
Iron-stabilized aluminum titanate powder was prepared via the non-hydrolytic sol-gel method,using anhydrous aluminum chloride and titanium tetrachloride as precursors,anhydrous ethanol as oxygen donor,iron powder,iron chloride and iron ethoxide as iron stabilizers.The effect of iron stabilizers on the low-temperature…
Aluminum titanate nanopowder was prepared by the nonhydrolytic sol-gel method(NHSG) at low temperature,using anhydrous aluminum chloride and titanium tetrachloride as precursors,butanol as oxygen donor,polyethylene glycol(PEG) as dispersant.The influence of precursor concentrations,different gelation processes and PEG…
The hydrogen storage properties of Li(7)VN(4) and Li(7)MnN(4) were investigated both by experiment and by density functional theory calculations. Li(7)VN(4) did not sorb hydrogen under our experimental conditions. Li(7)MnN(4) was observed to sorb 7 hydrogen atoms through the formation of LiH, Mn(4)N, and ammonia gas.…
The process of formation of narrow size spherical PdNPs covered by cyclodextrins with an average size of 5.1 nm ± 0.5 nm has been investigated in aqueous solution at room-temperature. Analyses by UV-Vis spectroscopy and dynamic light scattering (DLS) at the beginning of reaction indicated a fast exchange of chloride i…
The cold crucible levitation melting prepared LaNi3.2-xMn03Cox (x = 0.2 ∼ 0.8) series alloys, the system of Co substitution of Ni on the alloy structure, hydrogen storage performance and electrochemical properties. XRD analysis showed that the cast alloy by the La2Ni7 phase, LaNi5 phase and LaNi3 phase composition; PC…
Four kinds of NRs were obtained by coagulating the fresh NR latex(NRL) with dif-ferent processes:NRL coagulated by acetic acid(NR-1),NRL coagulated by microorganism(NR-2),ethanolamine-blended NRL coagulated by microorganism(NR-3),and protease-blended NRL coagulated naturally(NR-4).The effect of preparation processes o…
162 Han et al. Abstract—We propose two metamaterials with sub-wavelength double-slots — single-side double-slot metamaterial and double-side double-slot metamaterial. The dependence of the electromagnetic resonances and local intensity enhancements on the structural parameters is studied by the finite-difference time-…
Using a hybrid computational model, we simulate the self-assembly of nanorods in phase-separating A:B:C ternary melts, where C constitutes the minority phase. We assume that the rods are coated with C ligands and thus have a preferential affinity for the C phase. Due to the preferential wetting interaction, the steric…