Materials Literature
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Abstract Poly(ethylene terephthalate) (PET) nanocomposites reinforced with a very small quantity of modified carbon nanotube (CNT) were prepared by melt compounding using a twin‐screw extruder. The introduction of carboxylic acid groups on the surfaces of the nanotube leads to the enhanced interactions between the nan…
Abstract Uniform dispersion of wood fiber in high‐density polyethylene can improve the mechanical properties and surface finish of the wood plastic composites. However, it is difficult to achieve uniform dispersion when the wood content is high, due to its low thermal stability, incompatibility with polymer, and affin…
Abstract It is demonstrated here that three different α‐amino N ‐carboxyanhydrides (NCAs), including for the first time O ‐benzyl‐ L ‐threonine NCA, can be polymerized in a controlled/“living” fashion without the need for transition metal catalysts or complex custom‐made glassware. Homopolymerizations in tetrahydrofur…
<div class="htmlview paragraph">Copper/zeolite catalysts are the leading urea SCR catalysts for NOx emission treatment in diesel applications. Sulfur poisoning directly impacts the overall SCR performance and is still a durability issue for Cu/zeolite SCR catalysts. Most studies on sulfur poisoning of Cu/zeolite…
The simultaneous recording of three impedance functions (electrochemical impedance, color, and mass impedance) allows the role of different species to be distinguished easily during electrochemical processes in conducting and electrochromic films. Herein, this technique has been applied to the study of the Prussian bl…
<div class="htmlview paragraph">Selective Catalytic Reduction (SCR) catalysts have been designed to reduce NOx with the assistance of an ammonia-based reductant. Diesel Particulate Filters (DPF) have been designed to trap and eventually oxidize particulate matter (PM). Combining the SCR function within the wall…
Carboxylic acid terminated poly(ε-caprolactone)s (PCL-COOHs) with narrow polydispersity were synthesized and coupled with poly(ethylene glycol) (HO-PEG-OH) to afford PCL-PEG-OH copolymers. The hydroxyl groups in the PCL-PEG-OHs were then converted to maleimide groups to afford maleimide terminated PCL-PEG-MALs that co…
Understanding ferroelectricity at the deep submicron regime is desirable in utilizing it for next generation nonvolatile memory devices, medical imaging systems, and rf filters. Here we show how piezoresponse force microscopy can be enhanced (1 nm resolution). Using this method, we have investigated ferroelectric and…
Inherently superhydrophobic and flexible cellulose-based bionanocomposites were fabricated from solid stabilized (Pickering) emulsions. Emulsions were formed by dispersing cyclosiloxanes in water stabilized by layered silicate particles and were subsequently modified by blending into a zinc oxide nanofluid. The polyme…
Highly polarized photoluminescence (PL) from M-plane ZnO layers and MgZnO/ZnO quantum wells (QWs) grown on ZnO substrates were observed. The energy difference between PL peaks of E⊥c and E∥c corresponded to that between A- and C-excitonic transitions. The polarization degree (P=0.43) at 300 K in QWs was slightly low d…
The dynamic wetting behaviors, especially the droplet morphology, of a water droplet impinging on five substrate surfaces were investigated. A water drop was released from 13.6 mm above a solid surface and impinged on substrates. The images (the silhouette and 45 degrees top view) were sequentially recorded from the m…
<div class="htmlview paragraph">Selective Catalytic Reduction (SCR) catalysts have been demonstrated as effective for controlling NOx emissions from diesel engines, maintaining high NOx conversion even after the extended high temperature exposure encountered in systems with active filter regenerations. As future…
ADVERTISEMENT RETURN TO ISSUEPREVNote[2.2]Paracyclophane-Layered Polymers End-Capped with Fluorescence QuenchersYasuhiro Morisaki*, Takuya Murakami, Toshiyuki Sawamura, and Yoshiki Chujo*View Author Information Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyo…
Abstract We report on the synthesis of a thermosensitive polymer brush‐supported 4‐ N , N ‐dialkylaminopyridine catalyst and the comparison of its catalytic activity with the corresponding linear polymer‐supported version in the hydrolysis of p ‐nitrophenyl acetate (NPA) as well as the effect of lower critical solutio…
Abstract This article presents the study of the modification of the particle/matrix interface region and its effects on the structure and dynamic mechanical behavior of polypropylene (PP)/hydrotalcite nanocomposites prepared by melt extrusion. The interface modification was promoted by combinying the organophillizatio…
<div class="htmlview paragraph">New Diesel exhaust gas aftertreatment systems, with combined DPF<span class="xref">*)</span> and deNO<sub>x</sub> (mostly SCR) systems represent a very important step towards zero emission Diesel fleet. These combined systems are already offered today by se…
Crossed-nanotube junctions, the basic constituents of carbon nanotube networks, are investigated by scanning photocurrent microscopy. The location of the predominant electrostatic potential drop, at the electrical contacts or at the junction, is found to be highly dependent on the transport regime. Also, whereas Schot…
Abstract The inhibition of halite mineral scale formation in oil and gas production is notoriously difficult. High concentrations of halite inhibitors always provide limited inhibition performance. In addition, it is extremely difficult to test halite formation and inhibition in the lab. In this paper, the dynamic hal…
<div class="htmlview paragraph">Low-cost lean NOx aftertreatment is one of the main challenges facing high-efficiency gasoline and diesel engines operating with lean mixtures. While there are many candidate technologies, they all offer tradeoffs. We have investigated a multi-component Dual SCR aftertreatment sys…
Abstract This article describes a process for esterifying polyvinyl alcohol (PVA) with L‐lactide (LLA) and D,L‐lactic acid (LA), using ethyl acetate and N , N ′‐dimethyl formamide at temperatures varying from 120 to 150°C. The grafting process was carried out under nitrogen to avoid possible oxidation or other degrada…