Materials Literature
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Abstract Human comfort perceptions in relation to textiles are influenced by tactile perceptions, moisture and thermal interactions. Studies in the thermal comfort of clothing have been done with instrumental techniques as well as with human subjects. There have also been many studies on influence of thermal comfort a…
The strain-mediated magnetoelectric coupling in piezoelectric-piezomagnetic composites with arbitrary spatial arrangement of particles of constituent phases is investigated. The free energy of such a composite is formulated as a functional of a phase field that is a shape function describing a spatial distribution of…
Deformation-induced crystallization of living polymer sulfur was studied with in situ wide-angle X-ray scattering, where chain scission plays a critical role. The onset of crystallization always occurs at the minimum stress point after the yield point, though different drawing rates were applied. With large drawing ra…
Caulinita é um argilomineral comumente encontrado nas frações finas de solos tropicais e subtropicais do Sul do Brasil. Em difratometria de raios X, sua presença é verificada pelo pico correspondente à distância 00l de d = 0,715 nm. Contudo, em alguns solos pode-se observar pico superior a d = 0,720 nm, correspondendo…
Evolution of morphology change was investigated for ZnO nanoneedle array grown by low-temperature MOCVD. Well-aligned ZnO nanoneedle array was deposited on the ZnO buffer-film/ Si substrate at temperatures below 500°C. A rod-shaped ZnO nanowire in the initial growth stage changed into needle-shaped as the deposition p…
The anomalous behavior of yield stress of materials upon an increase in temperature under high strain rate conditions are discussed. The transition of the material to the plastic state occurs when the stress attains a certain critical value. The effect of temperature can be taken can be taken into account by introduci…
Abstract The molecular and physicochemical properties of the studied starches modified with 0.36% HCl in methanol at 25 °C and 45 °C were related to the film properties of these starches. The weight‐averaged molecular weight ( M w ) and the number of long‐chain branches (DP 13‐36) of HCl‐methanol modified starch decre…
The FT-IR and FT-Raman spectra of 2-chloro-5-aminopyridine (CAP) have been recorded in the region 4000-400 cm -1 and 3500-100 cm -1 , respectively. The optimized geometry, frequency and intensity of the vibrational bands of CAP were obtained by the ab- initio and DFT levels of theory with complete relaxation in the po…
It is important to handling fabric in automated sewing system. When picking up a piece of fabric from layers, a person makes a crease and pinches one piece. Author proposed making a crease for picking up a piece of fabric and realized that a robot hand with a palm and three fingers picked up a piece of fabric from lay…
The observed Dy3+ ion upconversion luminescence in LiNbO3 crystal heavily codoped with ZnO was spectrally and temporally analyzed by microsecond time-resolved spectrum under 806nm intense femtosecond laser excitation at room temperature. Absorption spectrum and modified Judd-Ofelt approach were used to investigate its…
Highly ordered mesoporous silicas such as, mobile composition of matter, MCM-41, MCM-48, and the SBA-types of materials have helped to a large extent to understand the formation mechanisms of the pore structure of adsorbents and to improve the methods of pore structural characterization. It still remains an open quest…
Ba Ti O 3 ∕ Sr Ti O 3 ( 001 ) epitaxial thin films were prepared at various growth rates by pulsed laser deposition, and their heterostructures were evaluated by synchrotron x-ray diffraction measurements and cross-sectional scanning transmission electron microscopy observations. In a film grown at a low deposition ra…
Scaffold plays a critical role in tissue engineering where it provides necessary structural support for the cells to accommodate and to guide their growth in the three dimensional space into a specific tissue. Therefore, engineering scaffolds favorable for cell/tissue growth is of great importance and a pre-requisite…
Abstract Poly(ethylene terephthalate)/(PET) organically modified montmorillonite (OMMT) nanocomposites were synthesized by applying interlayer in situ polymerization. The OMMT was modified using 1‐decyl‐2‐methyl‐3‐dodecyl imidazolium salt. Application of such an OMMT prevented its degradation process as previously exp…
The felting propensity of different animal fibers, particularly alpaca and wool, has been examined. The Aachen felting test method was employed. 1 g of each type of fiber was soaked in 50 ml of wetting solution and agitated in a dyeing machine to make felt balls. The diameter of each ball was measured in nine directio…
Hybrid HF-DFT LCAO simulations of (001) surface properties and water adsorption on cubic SrTiO 3 , SrZrO 3 , and SrHfO 3 perovskites are performed in a single-slab model framework. The optimized atomic structures and water adsorption energies have been calculated for a single water molecule per the surface unit cell.…
Gold auto-assembled films were prepared from gold colloidal aqueous solutions on glass slides silanized with 3-aminopropyl-triethoxysilane at room temperature and with a thermal treatment at 200°C. The interaction of the major storage protein extracted and purified from aleurone cells of barley with the gold nanostruc…
In this paper, the influence on optical properties of alkali halides such as CsCl in a covalent glassy matrix has been investigated. Chalcogenide glasses belonging to the (GeS2)-(Ga2S3)-CsCI system with high ratio of CsCl present an entire transparency in the visible range. These glasses maintain good transmission up…
We report the dynamic mechanical behaviour of leather within the temperature range - 100 to 300°C, where three major viscoelastic transitions were identified, termed a, β and y. The β transition peak represents the glass transition temperature of the amorphous region of collagen molecules. It also demonstrates that ta…
Abstract Smectite formation in a vertisol developed from a granitic parent rock in the Kaélé region of Cameroon in a tropical, dry climate was studied by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), chemica…