Materials Literature
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Abstract Novel elastomeric miscible blend nanocomposites have been prepared by co-reacting isocyanate terminated liquid polyurethane pre-polymer with thiol terminated polysulfide together with chain extender, modified organic nanoclay, and curator. The studies report the influence of nanoclay loading on the morphology…
Hemp fabric reinforced polypropylene composites have been manufactured by film stacking method and their tensile and impact properties (notched Izod and low velocity impact at energies ranging from 5 J to 15 J) studied. Despite a non optimal interface adhesion, tensile modulus has been consistently increased by reinfo…
We have used a 3-GHz microwave host cavity to study the remarkable electronic properties of metallic, single-walled carbon nanotubes. Powder samples are placed in its magnetic field antinode, which induces microwave currents without the need for electrical contacts. Samples are shown to screen effectively the microwav…
Atmospheric plasma treatment (APT) has been used on a number of composite systems as an effective surface preparation technique for adhesive bonding. Recently, a new class of siloxane-modified polycyanurate resin systems (TC410) has been developed for use as a matrix material in composites utilized for space applicati…
The capacitance of de-alloyed Si 1−x Al x ( x = 0.2, 0.3, and 0.4) alloy ribbons with resistivities of 1–1000 Ωcm was measured as a function of frequency between 1 mHz and 1 MHz from electric charge/discharge pulse curves of 10 V applied at 100 ms–25 ns intervals, respectively, using an exponential transient analysis…
This paper describes the design and operation of the Falcon ion source. It is based on conventional design of anode layer thrusters. This ion source is a versatile, compact, affordable, and highly functional in the research field of the fusion materials. The reversed magnetic field configuration of the source allows p…
Doping into LiNbO3 (LN) and studying its magnetism might provide an alternative way for fabricating diluted magnetic compounds with potential application in the field of spintronics. Room-temperature ferromagnetic V-doped LN with V contents of 1–3 at. % was prepared by ion-beam implantation. The samples exhibit a maxi…
Abstract Ambient temperature X-ray diffraction data were collected at different pressures from two crystals of β-As 4 S 4 , which were made by heating realgar under vacuum at 295ºC for 24 h. These data were used to calculate the unit-cell parameters at pressures up to 6.86 GPa. Above 2.86 GPa, it was only possible to…
Zn1−x Mg x O films with various Mg contents were fabricated by using the atomic layer deposition technique. The optical properties of the Zn1−x Mg x O films were analyzed by using photoluminescence (PL) measurements for various of temperatures (5 K ∼ 300 K). For low-temperature PL measurements, as the Mg content was i…
Abstract We study the colloids of gold nanoparticles (GNPs) covered with water‐soluble natural branched polysaccharide arabinogalactan (ARB) which is used as reducing and capping agent in the GNPs colloidal synthesis. A set of the ARB‐GNP composites with gold content ranging from 3.1 to 11.9% was investigated. Transmi…
Abstract The plastic deformation and fracture processes of Ti‐3Zr‐2Sn‐3Mo‐25Nb alloy for surgical implants were directly observed by in situ scanning electron microscopy (SEM). The effect of phase transformations on deformation‐induced martensitic transformation accompanying the cyclic tensile fracture processes was i…
An electronically-controlled drug delivery system (eDDS) for the on-demand release of anti-inflammatory, anti-microbial and analgesic agents to aid in wound healing is currently under development. The loading of several drugs into conductive polymer films and their subsequent on-demand, controlled release upon applica…
Graphene and its derivative, graphene oxide (GO) have been substantively used as the main framework for dispersing or building nanoarchitectures because of their excellent properties in electronics and catalysis. The requirement to obtain superior graphene-metal hybrid nanomaterials has led us to explore a facile way…
Graft polymerization of vinyltriethoxysilane (VTES) onto styrene-butadiene rubber (SBR) was carried out in latex using potassium peroxydisulfate as an initiator. Then SBR-g-VTES/silica, SBR/TESPT/silica and SBR-g-VTES/TESPT/silica were prepared by mechanical mixing with different silica loading. The silica particles d…
For 4-cyano-3-uorophenyl 4-butylbenzoate, nematic glassformer at ambient pressure, dielectric relaxation studies were performed under elevated pressure. In the isobaric experiment, on cooling the nematic phase two superarrhenius -relaxations, ascribed to the reorientations of molecules around short axes and precession…
Biogenetic biosilica displays intricate patterns that are structured on a nanometer-to-micrometer scale. At the nanoscale, it involves the polymerization products of silica, apparently mediated by the interaction between different biomolecules with special functional groups. In this paper, using tetraethyl orthosilica…
Poly(ϵ-caprolactone) (PCL) films with Mn = 18 kDa obtained by compression molding (CM) or solution casting (SC) were subjected to Aspergillus oryzae (AO) lipase action in a phosphate buffer at pH 7 at 37°C. The appearance of randomly oriented cracks on the surface of incubated PCL films accompanied by a decrease of th…
Two near-β alloys, Ti-5Al-5Mo-5V-2Cr-1Fe and Ti-10V-3Fe-3Al, were produced by the blended element powder metallurgy technique. The use of (i) elemental powders with the Al-V master alloy in the case of Ti-5Al-5Mo-5V-2Cr-1Fe and, (ii) the complex Al-Fe-V master alloy in Ti-10V-3Fe-3Al has highlighted the influence of d…
We report a non-direct method to determine the minimum conductivity (σmin) of graphene. The proposed technique is based on the prior characterization of graphene sheet impedance at microwave frequencies using waveguides, and on the subsequent extraction of σminfrom the measured scattering rate. This approach presents…
Ba0.6Sr0.4TiO3/CoFe2O4 (BST/CFO) composites were synthesized via the conventional solid-state reaction method. The phase composition and surface morphology of the composites were investigated using X-ray diffractometer (XRD) and scanning electron microscope (SEM), respectively. The dielectric and magnetic properties o…