Materials Literature
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Cellulose nanocrystals are unique nanomaterials derived from the most abundant and almost inexhaustible natural polymer, cellulose. These nanomaterials have received significant interest due to their mechanical, optical, chemical, and rheological properties. Cellulose nanocrystals primarily obtained from naturally occ…
The paper deals with failure analysis of sink rollers used in hot-dip galvanizing of steel sheets. It presents the possibility of renovation the surface of the roller using thermally sprayed coatings. The paper contains results of research focused on quality evaluation of three coatings applied using HVOF technology -…
Embrittlement of material by hydrogen charging should be cleared for safety of storage vessel of hydrogen and components deal with hydrogen. A stainless steel is generally used as materials for hydrogen transportation and storage, and it has a big advantage of corrosion resistance due to nickel component in material.…
The effects of hydrogen charging on the mechanical properties of 304 stainless steels were investigated in conjunction with the detailed examinations of their fracture modes. The dependence of the absorbed impact energy and the surface hardness of the 304 stainless steels on the hydrogen charging time was characterize…
*University of Bielsko-Biala, Poland Abstract The paper presents preliminary results of simulation studies evaluating moisture absorption from the air that indicate the possibility of applying a superabsorbent polymer (SAP) in the construction of protective footwear insoles. The performance of different types of nonwo…
In this paper, we report the effect of deposition time on the properties of zinc sulfide thin films. The ZnS thin films have been grown on amorphous glass substrates and at various deposition periods ranging from 30 to 120 min by chemical bath deposition technique. Other parameters, such as reactant concentration, sol…
Lines of non-extension (LoNEs) on torso surface during arm abduction were investigated to provide appropriate location for inserting less-extensible yarns which can be used as seams for design and or clothing pressure variation. As experimental methods, reference points about 3 cm apart were marked on the skin and sca…
ABSTRACT Poly( p ‐dioxanone) (PPDO) has received significant attention due to its good biocompatibility and fast biodegradation profiles. In addition, PPDO is a polymer with high potential in biomedical applications. However, the conventional syntheses of PPDO via the ring‐opening polymerization (ROP) of p ‐dioxanone…
ABSTRACT In this research, cellulose nanocrystals (CNs) were extracted from corn cobs by 2,2,6,6,‐tetramethylpiperidine‐1‐oxyl radical‐mediated oxidation combined with ultrasonic treatment for the first time. These CNs were then used as a mechanical reinforcement agent and barrier in chitosan‐based bionanocomposite fi…
The activation of AA6061 Al alloy while coupled with low alloy steel or carbon-carbon composite results in severe corrosion of the former and protection of the latter. Potential drop and E-I kinetics of these couples are nonlinear; hence, the decrease in galvanic current density increases the distance from the “anode…
During the global technological progress, including in the textile field, it has become necessary to look for innovative solutions to make fabric designs that can be characterised by special texture and relief, as well as opportunities to create them with modern weaving looms. Most commonly, such innovative fabric str…
International audience
ABSTRACT In this investigation, we studied the impact toughness and viscoelastic behavior of polypropylene (PP)–jute composites. In this study, we used viscose fiber as an impact modifier and maleated PP as a compatibilizer. The toughness of the composites was studied with conventional Charpy and instrumental falling‐…
ABSTRACT A series of inherently heat‐sealable copolyimides (CPIs) with high glass transition temperatures were synthesized from 2,3,3′,4′‐oxydiphthalic anhydride (aODPA) and bicomponent diamines, 4,4′‐oxydianiline (ODA) and para ‐phenylenediamine (PDA). The PI chain rigidity was manipulated by the regulation of the di…
ResumoCinza de biomassa é um resíduo sólido gerado em grande quantidade em caldeiras para produção de energia e calor. Na indústria de processamento de cacau, que usa casca de amêndoa de cacau (20%) e madeira de eucalipto (80%) como combustível, são geradas cinzas volantes e cinzas de fundo, cujas propriedades são pou…
This study presents a novel approach for the modelling of transformer core magnetisation characteristics under DC bias condition by using the inverse Jiles–Atherton (J–A) model. An improved shuffled frog leaping algorithm (SFLA) is proposed to identify the five parameters of J–A model, where an adaptive chaotic mutati…
Abstract Polycrystalline samples of tantalum and vanadium single and double substituted hexagonal potassium tungsten bronzes (K-HTB’s) with nominal compositions of K 0.3 (W 6+ 0.7 W 5+ 0.3–y Ta 5+ y )O 3 (0≤y≤0.3), K 0.3 (W 6+ 0.7 W 5+ 0.3–y V 5+ y )O 3 (0≤y≤0.18) and K 0.3 (W 6+ 0.7 W 5+ 0.3–y Ta 5+ y/2 V 5+ y/2 )O 3…
Optical applications in the 21st century are rapidly evolving, and materials with new capabilities are needed. Applications covering wide wavelength ranges are a particular challenge as materials can behave very differently in the ultraviolet, visible, and infrared spectral regions. A generalized model for selecting o…
Abstract The stability of a Cs‐promoted Co‐Mo/Al 2 O 3 catalyst, prepared by incipient wetness impregnation and operated under typical higher alcohol synthesis conditions, (280 °C, 8.2 MPa, GHSV 8524 h −1 , H 2 :CO ratio 1) for up to 100 h time‐on‐stream (TOS), is reported. The major cause of catalyst deactivation is…
Among many other materials for the reinforcement of composites, technical fabrics are increasingly being used for the same purpose, especially from glass and basalt tows, which have good mechanical properties.. During tensile stress these fabrics are elongated in the direction of tensile force, and at the same time th…