Materials Literature
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Probing QD stablility: A convenient solvent-evaporation approach to prepare water-soluble, biocompatible CdSe/ZnS (core/shell) quantum dots (QDs, see figure) is reported. The QDs are modified with a surfactant and polyamidoamine molecules that possess an ester terminal group. This method avoids complicated multistep l…
Abstract The effects of processing parameters on the strength of the fusion bonding interface have been investigated. The interface was generated when an isotactic polypropylene homopolymer was injection molded on a solid self‐reinforced polypropylene substrate. The interface strength was measured in shear configurati…
Abstract Several different gelation assessment methods such as differential scanning calorimetry, capillary rheometry, solvent absorption, wide angle x‐ray scattering, transmission electron microscopy, and atomic force microscopy were applied to a typical PVC window profile formulation subjected to various thermomecha…
Abstract Poly(ethylene‐vinyl acetate) (EVA) copolymer was melt grafted with maleic anhydride (MAH) in a twin screw extruder in the presence of peroxide. It is confirmed that MAH has been melt grafted on the backbone of EVA by FTIR using the method of hydrolysis. The NMR analysis suggests that the grafting reaction occ…
Abstract Combined effects of clay treatment and compatibilizer polymers on the structure and properties of polypropylene/clay nanocomposites were studied. Dynamic mechanical analysis was used to analyze comparatively the dynamic mechanical response of different nanocomposites prepared from polypropylene and montmorill…
Abstract In this investigation, attempts are made to modify a high‐performance polymer such as polybenzimidazole (PBI) (service temperature ranges from −260°C to +400°C) through high‐energy radiation and low‐pressure plasma to prepare composite with the same polymer. The PBI composites are prepared using an ultrahigh…
Abstract Crosslinked chitosan and chitosan/poly(ethylene oxide) (PEO) blend membranes were prepared using the solution casting technique for eleutherococcus sentisocus (ES) and vitamin B 12 release. A naturally occurring and nontoxic crosslinking agent, genipin, was used to form the chitosan and chitosan/PEO blend net…
Abstract This work investigates the resistance against marine corrosion of an epoxy‐based coating modified by the addition of electrochemically produced and oxidized poly(3,4‐ethylenedioxythiophene) (PEDOT). For this purpose, electrodeposition of PEDOT was performed on steel electrodes by electrochemical polymerizatio…
Abstract In this study, melamine cyanurate (MCA)/melamine phosphate (MP) composite flame retardants were synthesized in the solution of phosphoric acid/polyamide 6 (PA6). Phosphoric acid acted as the solvent of PA6, catalyst of melamine‐cyanurate self‐assembly reaction and reactant of melamine‐phosphoric acid reaction…
Abstract Textile biocomposites were prepared by reinforcing natural rubber with woven sisal fabric. Sisal fabric was subjected to various chemical modifications like mercerization, silanization, and thermal treatment. The moisture uptake of the textile composites was found to depend upon fiber content as well as archi…
Thanks a bundle! A strong photoresponse for macroscopic bundles containing thousands of aligned carbon nanotubes (suspended between two electrodes, see figure) upon illumination is observed at wavelengths ranging from the visible to the far-infrared. At a relatively small applied bias, the current flow in the nanotube…
Potassium neodymium molybdenum oxide, KNd(MoO 4 ) 2, has been synthesized by the solid-state method. The structure and microstructure have been studied by X-ray powder diffraction and transmission electron microscopy (TEM). TEM revealed that the KNd(MoO 4 ) 2 structure is incommensurately modulated. The scheelite-like…
Abstract Modification of a Soxhlet apparatus widely used for extraction is suggested. This modification is aimed at overcoming the main disadvantage of the Soxhlet apparatus for extraction, that the extraction takes place at around room temperature. The modified apparatus allows extraction to be performed with boiling…
Abstract Assembled structures of calcium carbonate (CaCO 3 ) nanocrystals have been examined for polymer/CaCO 3 thin‐film composites synthesized through a self‐organization process inspired by biomineralization. For the crystallization of CaCO 3 , a thin‐film matrix of chitosan has been used as a polymeric substrate.…
The triple-decker complex [Yb 3 L 3 (OAc) 2 Cl](H 2 O) 3 (CH 3 OH) 1.5 (CH 3 CN) 0.5 ( 1 ) is formed from the reaction of H 2 L, YbCl 3 ·6H 2 O, and Zn(OAc) 2 ·2H 2 O in 25% yield (H 2 L = N, N ‘-bis(5-bromo-3-methoxysalicylidene)phenylene-1,2-diamine). The single-crystal X-ray structure of 1 revealed the presence of…
Abstract The viscose rayon containing cyclotriphosphazene were prepared by the method of blending spinning. The combustibility and thermal stability of the fire‐retardant viscose rayon were evaluated by 45 ° slope burning method, limit oxygen index (LOI), differential scanning calorimetry, thermogravimetry analysis. T…
Abstract The surfaces of polyester (PET) fabrics and foils were modified by low‐pressure RF plasmas with air, CO 2 , water vapor as well as Ar/O 2 and He/O 2 mixtures. To increase the wettability of the fabrics, the plasma processing parameters were optimized by means of a suction test with water. It was found that lo…
Abstract Oleoyl‐chitosans (O‐chitosans), with three degrees of substitution (DS), were synthesized by reacting chitosan with oleoyl chloride. The chemical structures of these polymers were characterized by 1 H NMR and FTIR. The results suggested the formation of an amide linkage between amino groups of chitosan and ca…
Abstract The goal of this work was to prepare exfoliated poly(lactic acid) (PLA)/layered‐silicate nanocomposites with maleic anhydride grafted poly(lactic acid) (PLA–MA) as a compatibilizer. Two different layered silicates were used in the study: bentonite and hectorite. The nanocomposites were prepared by the incorpo…
Abstract Differential scanning calorimeter (DSC) and polarized optical microscopy (POM) have been used to investigate the isothermal and nonisothermal crystallization behavior of poly(ε‐caprolactone) (PCL)/multi‐walled carbon nanotube (MWNT) composites. PCL/MWNT composites have been prepared by mixing the PCL polymer…