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Online since: October 2015
Authors: Sergey Galanov, Vera A. Batyreva, Olga I. Sidorova
Conceptually different approach is focused on production of monolithic catalyst which as a high ratio ‘geometric surface / volume’ with active component directly enclosed into the honeycombed structure.
According to Fig. 1, the structure of fresh block SHS catalyst of conversion of methane into syngas consists of tear-drop shape metal nickel with distinct limits connected to oxide matrix, which provides strength and mechanic properties of catalytic block.
Solovev, Oxidizing conversion of methane on the structured Ni-Al2O3/cordierite catalysts, Catalysis in the Industry, 4 (2011) 31-42
Sidorova, Effect of a precursor on the phase composition and particle size of the active component of Ni-ZrO2 catalytic systems for the oxidation of methane into syngas, Russian of physical chemistry A, V.88, 10 (2014) 1629-1636
Sidorova, Combined conversion of methane into syngas on Ni/MgO-Cr2O3 catalysts, Russian Journal of Applied Chemistry, V.87, 10 (2014) 1435-1441
Online since: April 2016
Authors: Leila Mahdavian, Nasim Sarami
Comparison of Artificial Stone Made from Sludge Stone with Travertine Stone waste of Stone Cutting Factory Nasim Sarami and Leila Mahdavian* Department of Chemistry, Doroud Branch, Islamic Azad University, P.O.
By adding nanoparticles of titanium dioxide, which combines artificial stone made from natural minerals and chemical-polymer can be used to modify the molecular structure of cement (crystalline) and leads polymerization reaction (Fig.2).
By changing the molecular structure being produced compounds with 2 to 3 times the strength of concrete and 2 times of natural stone with adhesion and high compressive strength, low moisture absorption, lack of blur penetration in the context of stone and self-cleaning.
With the addition of titanium dioxide nanoparticles, properties of samples increase, but the effect of TiO2 nanoparticles in SSCF are more because depends to expansion of the surface and the crystal structure of titanium dioxide nanoparticles and grain size of the lesions.
[10]LEA,F.M.The chemistry of cement and concrete(London,Arnold,1970)
Online since: July 2015
Authors: Markus Gabler, Lena Müller, Simon Küppers, Hans Christof, Sabine Frick, Elisabeth Giebel, Paul Hofmann, Götz T. Gresser
Gresser1,h 1 Institute of Textile Technology and Process Engineering, Koerschtalstrasse 26, 73770 Denkendorf, Germany 2 Institute of Textile Chemistry and Chemical Fibers, Koerschtalstrasse 26, 73770 Denkendorf, Germany 3 Buckland & Taylor Ltd., 788 Harbourside Drive, Suite 101, BC V7P 3R7 Vancouver BC, Canada ahans.christof@itv-denkendorf.de, blena.mueller@itv-denkendorf.de, csimon.kueppers@itv-denkendorf.de, dpaul.hofmann@itv-denkendorf.de, eelisabeth.giebel@itcf-denkendorf.de, fsabine.frick@itcf-denkendorf.de, gmagb@b-t.com, hgoetz.gresser@itv-denkendorf.de Keywords: FBG sensor, PVDF fibers, pultrusion, textile sensor, functional integration Abstract.
With a growing use providing safe FRP components becomes more and more important since FRP structures are being used in the automotive, aerospace and civil engineering sector.
This bridge is a compound structure of steel beams and a carriageway deck out of glass fiber reinforced plastic (GFRP).
For a scientific condition monitoring of the composite structures 113 strain gauges have been applied on the outside of the parts.
For investigating the utilization of the piezoelectric effect of PVDF fibers for sensory applications in FRP, PVDF fibers were spun at the Institute of Textile Chemistry and Chemical Fibers in Denkendorf (ITCF).
Online since: June 2014
Authors: Tatiana Eugenievna Kurennykh, Anatoly Yakovlevich Fishman, Vladimir Borisovich Vykhodets, G.A. Kozhina, E.V. Vykhodets
Introduction Metal oxides with perovskite structure, for example, rare earth metals manganites are promising functional materials.
These regularities were radically different from those for oxides with a perovskite structure, in which there were no manganese cations.
The resulting single phase powders had perovskite-type orthorhombic structure and the particle size from 0.1 to several microns.
Vykhodets: Advances in Quantum Chemistry Vol. 44 (2003), p. 497 [4] A.V.
Yankin: Doklady Physical Chemistry Vol. 445 (2012), p. 112
Online since: February 2014
Authors: João Ventura, João P. Araújo, Anastasiia Moskaltsova, Mariana P. Proenca, Celia T. Sousa, Arlete Apolinário, Gleb N. Kakazei
By tuning such parameters one can control the magnetic properties of the structure, in particular its coercivity.
Therefore, the accurate control of the NWs parameters and detail study of the nanomaterial’s magnetic properties gives new information on the future applications of such structures [6].
Huang, Template synthesis of large-scale single-crystalline Co-Ni alloy nanowire arrays by electrochemical deposition, Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 38 (2008) 475
Fukuda, Ordered metal nanohole arrays made by a two-step replication of honeycomb structures of anodic alumina, Science 268 (1995) 1466
Araujo, Nanoscale topography: A tool to enhance pore order and pore size distribution in anodic aluminum oxide, The Journal of Physical Chemistry C 115 (2011) 8567–8572
Online since: November 2011
Authors: Wei Zeng Chen, Ning Li
The short-range order atomic structure is of the atomic nucleus growth orientation.
And the long-range disorder structure is of the massive nucleus suppression growth.
The short-range atomic structure is in order for cluster with SRO structure.
The LROO structure disperses the deposited composition well-proportioned.
Physics and Chemistry of Solids, vol. 63(2002), p. 1967 [7] G.
Online since: July 2014
Authors: Ping Chen, Yi Wen Zhu, Fen Fen Hu, Mei Li Zhou, Zheng Liang Wang
And their structure and photo-luminescent properties were investigated.
In Ca0.96-ySryAl2Si2O8: 0.04Eu2+ (y = 0.10, 0.30, 0.50, 0.70, 0.90) system, for y ≦ 0.03, all the compositions crystallize in triclinic structure of CaAl2Si2O8, and on further increase of y, the system undergoes a compositionally induced phase transition from triclinic to monoclinic structure.
For Ca0.96-yMgyAl2Si2O8: 0.04Eu2+ (y = 0.10, 0.30, 0.50, 0.70, 0.90) system, for z ≦ 0.03, all the compositions are of triclinic structure of CaAl2Si2O8.
The sub-lattice structure of CaAl2Si2O8 will be changed by replacing part of Ca2+ with Sr2+ and Mg2+.
In this system, for y ≦ 0.03, all the compositions crystallize in triclinic structure of CaAl2Si2O8 and on further increase of y, the system undergoes a compositionally induced phase transition from triclinic to monoclinic structure.
Online since: February 2016
Authors: Nina Ivanova, Alla Pustovalova
The change of the films structure increases with the growth of the nitrogen content.
The structure change can be attained by doping with non-metal impurities.
Evdokimov et al., Structure and properties of Ti-O-N coatings produced by reactive magnetron sputtering, Russ.
Wang, Structure and properties of nitrogen incorporated in TiO2 nanotubes array, Mater.
[14] Information on http://webbook.nist.gov/chemistry [15] G.V.
Online since: June 2010
Authors: Aekartit Boonprasertpoh, Duanghathai Pentrakoon, Warintorn Chavasiri
Properties of Polyethylene Foam Incorporated with Extracted Lignin from Pulping Black Liquor Aekartit Boonprasertpoh1,a , Duanghathai Pentrakoon1,b and Warintorn Chavasiri2,c 1 Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand 10330 2 Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand 10330 a trx_78@hotmail.com, bduanghat@sc.chula.ac.th, cwarintho@yahoo.com Keywords: Lignin, polyethylene foam, black liquor Abstract.This research was a study of physical and mechanical properties of polyethylene foam incorporated with various amount of lignin from 5 to 20 phr.The lignin was isolated from black liquor from Kraft pulping using a sulfuric acid at pH 3 and washed with hot water.
The foam density increased slightly with amount of lignin.From SEM micrographs, it exhibited that all PE foams had a closed-cell structure where the cell sizes varied with amount of lignin.Foam incorporated with 10 phr of extracted lignin showed the finest cell distribution with an average cell diameter of 0.51 millimeters.
The chemical structure of the obtained lignin was characterized by FT-IR technique on Niccolet 6700 FT-IR, a resolution of 4 cm -1 with 64 scans at a frequency range of 4004000 cm-1.
All micrographs reveal that polyethylene foam samples have closed-cell structure where cell diameter measured by SemAfore program is presented in Table 1.
The explanation for this may be due to the cell structure and cell distribution of prepared foam samples.
Online since: August 2011
Authors: Pei Yi Li, Mei Yun Zhang, Zhi Jie Wang, Chun Tao Lin
The Hydroxyl of Cellulose and -N=C=O produced the structure of amino formic acid ester, which formed as a bridge between the fibers.
On the contrary, the surface of IPDI treated paper formed compact film, which filled among the fibers and get the structure of bridge.
Fig. 7 SEM of decollation on base paper(×50) Fig. 8 SEM of decollation of base paper on IPDI (×50) Fig. 9 SEM of base paper (×400) Fig. 10 SEM of base paper on IPDI (×400) FT-IR analysis.The FT-IR of paper on IPDI was shown as Fig. 11: ① there was absorption of -OH and -NH in 3418.86 cm-1. ② there was not obvious absorption from 2270 cm-1 to 2240cm-1, which indicated there was nearly no remaining IPDI in paper and the reaction is completed. ③ there was absorption of -CO-NH- in 1559.60cm-1, which indicated the chemical reaction happened between the IPDI and the Hydroxyl in cellulose and the structure of R-CO-NH-Ar was produced.
Through the observation with analysis on SEM and analysis on FT-RI, the result was as follows: the strength effect of paper-based material was because the Hydroxyl of Cellulose and -N=C=O produces the structure of amino formic acid ester, which worked as a bridge between the fibers.
Chemistry and Industry of Forest Products, 1996, (42): 1035~1041.