Materials Literature
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Abstract In this study, cellulose sulfoacetate (CSA) was produced with cellulose extracted from sugarcane bagasse with sulfuric acid as a catalyst under homogenous conditions so that the derivative could be applied as an additive for mortar of Portland (Cimento Portland de alta resistência inicial, CPV‐ARI) cement. Th…
Based on the previously proposed concept of a lab on a fiber (LOF) and an LOF-based platform for detecting trace vapors of TNT explosives, in this paper, we study the compatibility of the LOF device with a preconcentration unit. We report the detail investigation of factors that crucially affect the overall performanc…
A fixed bed reactor was designed, modeled and simulated for hydrogen storage on-board the vehicle for PEM fuel cell applications. Ammonia borane was selected by DOE’s Hydrogen Storage Engineering Center of Excellence as the initial chemical hydride of study because of its high hydrogen storage capacity (up to ∼16% by…
The structures of the four isomers of SiW 11 O 39 8− were optimized by DFT methods, by taking into account their expected symmetry properties. The structures were compared to those of related compounds (SiW 12 O 40 4− and its monosubstituted derivatives). The stability order corresponds well to that observed experimen…
This study investigates the performance and operating characteristics of 5kW-class solid oxide fuel cell and gas turbine (SOFC/GT) hybrid systems for two different configurations, namely single- and dual- spool gas turbines. Both single and dual spool turbo-chargers are widely used in the gas turbine industry. Even th…
Aller guten Dinge sind drei: Die Hauptmerkmale eines optischen Transistors (Steuerung und Verstärkung) werden anhand der photophysikalischen Eigenschaften einer molekularen Triade gezeigt (siehe Bild). Zwei Bausteine der Triade sind hocheffiziente Fluorophore, wohingegen der dritte Baustein ein photochromes Molekül is…
Abstract Thermal diffusivity of freestanding catalytic chemical vapor deposition (CCVD) grown multi‐walled carbon nanotube (MWCNT) forests (height of 1.5 and 1.9 mm) was characterized in the temperature range between 25 and 200 °C. Copper and Al‐alloy metal blocks were used as references for validation of the experime…
Mesoporous ZnO microspheres with a diameter of about 10 μm were prepared through the combination of a membrane-dispersion microstructured reactor with a hydrothermal process. First, ZnSO 4 reacted with NH 4 HCO 3 in a membrane-dispersion reactor to produce the Zn 5 (CO 3 ) 2 (OH) 6 precursor, and then the precursor wa…
Abstract In this study, microcellular foaming of low‐density polyethylene (LDPE) using nano‐calcium carbonate (nano‐CaCO 3 ) were carried out. Nanocomposite samples were prepared in different content in range of 0.5–7 phr nano‐CaCO 3 using a twin screw extruder. X‐ray diffraction and scanning electron microscopy (SEM)…
Thermoplastic natural rubbers based on reactive blending of maleated natural rubber/ethylene-vinyl acetate copolymer and epoxidized natural rubber/ethylene-vinyl acetate copolymer blends were prepared via a simple blend technique. Phenolic-modified ethylene-vinyl acetate copolymer was used as a blend compatibilizer fo…
The calorimetric method has for a long time been applied for energy conversion efficiency measurement in electrical machines. The number of temperature sensors necessary for its successful application in the field constitutes in one of the major drawbacks of the method. This paper shows how the usage of IR thermal ima…
By means of atomistic molecular dynamics simulations, we investigate the structure and stability of alkyl-modified polyamido-amide (PAMAM) dendrimers at the air/water interface as a function of the number and the relative position of the modified end groups. We find that the PAMAM dendrimer with all terminal groups fu…
Abstract Tailoring the electronic properties of graphene is of fundamental interest regarding its application in electronic devices. One of the key strategies is chemical functionalization which modifies the π ‐electron system and thus can induce band gaps. However, in order to control the degree of functionalization…
Poly( N, N -dimethyl- n -octadecylammonium p -styrenesulfonate) (PSS-DMODA) polymers were prepared and investigated as organogelators for low-polarity aromatic solvents. Gels were prepared by heating polymer solutions (2.5–20% w/v polymer) at elevated temperature and then cooling in an ice bath. Gelation was confirmed…
In this work, conductive yarn manufacturing that is formed by wrapping metal wire around the cotton yarn is described. Roving material at different thicknesses and copper and stainless steel-based wires having different diameters were fed into the ring frame to produce yarns containing metal wires. Performance of the…
Cyclic voltammetry and spectroelectrochemistry were separately employed to study and observe the electron transfer and trapping behavior between two bipolar polymers synthesized by the cyclic voltammetry method. The poly(DNTD) and poly(Cl 4 DPTD) were pair-sequentially electropolymerized on a Pt disk electrode and ind…
Qiang Shuab, Xiaoxuan Zouab, Wenli Daiab & Zhuo Fua a Institute of Polymer Science and Engineering, College of Chemistry, Xiangtan University , Xiangtan , Hunan , P. R. China b Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province, Xiangtan University , Xiangtan , Hunan , P. R. China T…
Abstract In this article, the surface of styrene‐butadiene rubber (SBR) was brushed with trichloroisocyanuric acid (TCI) (1 or 2 wt % in ethyl acetate) and then thermally treated under different conditions. The chemical modification was characterized by contact angle measurement and surface energy, ATR‐FTIR spectrosco…
We have studied the catalytic activity of CeO2/Pt–SiC composites in the total and partial oxidation as well as the dry reforming of methane. The composites were synthesized by an in situ functionalization strategy with variation in ceria and platinum contents and processing conditions. The impact of composition and py…
Abstract This work reports an in situ wide‐angle X‐ray scattering (WAXS) study of the structural evolution of PET with distinct initial morphologies during step uniaxial stretching in the solid state. Two types of samples were analyzed under synchrotron X‐ray radiation, namely quasi‐amorphous (QA) and semicrystalline…