Materials Literature
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This paper presents an experimental model to predict the porosity of woven fabrics made from staple-fibre yarns, particularly with regard to the area of pore cross-section, equivalent pore diameter, maximum and minimum pore diameters, pore density, and open porosity, on the basis of the geometrical parameters of woven…
The tribo/contact electrification theory of materials is envisaged from the chemical Lewis acid-base concept and an attempt has been made to find a correlation between these two phenomena. The dono ...
Excitation and emission spectra and luminescence lifetimes of Eu3+ complexes obtained by dissolving anhydrous EuCl3 and EuCl3/2,2-bis(hydroxymethyl)-2,2′,2″-nitrilotriethanol (Bis-tris) in anhydrous dimethylformamide (DMF) and those from a Eu(Bis-tris)2Cl3 crystalline sample have been studied. Two distinct Eu3+ comple…
A low concentration chromate passivation treatment has been successfully applied to a new type of hot dipped Zn2 5Al alloy coating, and the corrosion resistance of the chromate passive film has been assessed using the copper accelerated acetic salt spray (CASS) test, electrochemical measurements, and sea water immersi…
A model employing stacking increments is introduced for the analysis of bivalve shell growth and form. The model is based on the components of shell growth that are potentially independent: the rate of mantle cell proliferation, the rate of precipitation of shell material, and the rate of translation of the pallial li…
Wort boiling is the most energy intensive stage in the brewing process. For this reason considerable attention has been given to improve the efficiency of wort boiling systems. Alternative wort boiling technologies, such as low pressure boiling and high temperature wort boiling, have been studied in detail during the…
Some time ago a proposal was made [1] for an approach to calculating the initial crystallinity for polymers using MTDSC, i.e., the crystallinity of the sample before the start of the experiment. The essence of the technique is that it attempts to estimate the contribution from the vibrational heat capacity to the tota…
A micro-scale dynamic approach was recently proposed to simulate wear of materials. The model was developed based on fundamental physical laws without employing empirical equations or tribological rules. In this model, a material system is discretized and represented using a discrete lattice. Each lattice site represe…
ABSTRACT. The structure of the lithium zinc borate LiZnBO3 has been established by single-crystal X-ray diffraction methods. It crystallizes in the triclinic space group P1(Z=2), with unit-cell parameters- a= 5.0915(9)Å, b=5.059(1)Å, c=6.156(1)Å, V=120.6(1)Å3, α=65.81(1)o, β=65.56(1)o and γ=59.77(1)o. The struc-ture w…
Peer Reviewed
A series of poly(ether-ester)s derived from dimethyl terephthalate (DMT), dimethyl fumarate (DMF), 1,4-butandiol (BD) and poly(tetramethylene oxide) (PTMO,Mn = 1000 g/mol) was synthesized in a two stage process involving transesterification and polycondensation in the melt. The mole ratio of the starting components wa…
The glass systems xZnO. (80-x)V 2 O 5 . 20P 2 O 5 (LP) and xZ.nO.(60-x)V 2 O 5 .40P 2 O 5 (HP) of various compositions have been prepared using the melt quench method. DC electronic conductivity of these glasses has been carried out over a temperature range 360-520 K. Conductivity in these glasses is due to hopping of…
Sol-gel synthesis, characterization and a possible explanation for the formation of TiO2-modified SiO2 mesoporous materials are described. The effects of TEOS-aging time and Ti-quantity have been investigated systematically. Surface area above 1000m2/g was obtained with low quantity of Ti-loading when SiO2 gelation wa…
Kinetics of thermal degradation of polylactic acid (PLA), a biodegradable and bioabsorbable polyester, under atmosphere of inert gas has been invest-igated. Isothermal and dynamic heating techniques of thermogravimetry have been used in this study. The weight loss data versus time were recorded at
Nanoparticles of diamond were formed from detonations, and density and other measurements indicate they are hollow. The most likely explanation is that they condensed from liquid carbon which is less dense than diamond.
Novel tellurium containing fulvalene-type electron donors, triselenatellurafulvalene (TSTeF) and diselenaditellurafulvalene (DSDTeF) are synthesized by an efficient two- or three-stage procedure. They behave as superior electron donors to give highly conductive charge-transfer (CT) complexes with TCNQ. TSTeF–TCNQ show…
Polyurethane closed-cell rigid foams have been widely used as insulants in the building and refrigeration industry and also for district heating pipes. It is the special combination of excellent insulation performance and the mechanical stability due to the foaming process which makes this material very attractive for…
NiO/YSZ composite particles with 20 to 35 mol% Y2O3 stabilized ZrO2 (YSZ) are prepared by Spray Pyrolysis (SP) method. The NiO/YSZ composite particles are NiO particles coated with fine YSZ grains. The morphology of Ni/YSZ cermet anode fabricated from the composite particles is noticeably influenced by the YSZ content…
Alumina (Al2O3) particles fouled with bovine serum albumin (BSA) were cleaned with alkaline electrolyzed water and NaOH solutions of different pHs. The efficiency and rate of BSA desorption during batchwise and continuous cleaning with alkaline electrolyzed water depended on the solution pH, i.e., the hydroxide ion co…
Abstract Aging of oily soils produces difficult‐to‐remove yellow stains on fabrics. This study examines the effect of different textile substrates on yellowing and removal of aged oily soils. Model oily, squalene and artificial sebum, were aged at 40°C on cotton, nylon, and polyester fabrics for 8 wk. Radiotracer and…