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Online since: September 2014
Authors: Vyacheslav Mali, Michail Korchagin, Tatyana Sameyshcheva, Alexander Anisimov, Sayina Bysyina, Lilia I. Shevtsova
Lavrentiev SB RAS 3 Institute of Solid State Chemistry and Mechanochemistry SB RAS apandorra.06@mail.ru (corresponding author), bvmali@mail.ru danis@hydro.nsc.ru, ckorchag@solid.nsc.ru, eedeliya2010@mail.ru, fsaina5255mail.ru@mail.ru Keywords: intermetallics, composite, nickel, aluminum, spark plasma sintering, structure Abstract.
Thus, the structure of sintered samples is alternating layers of nickel and intermetallics (Fig. 1, a).
“Nickel – nickel aluminide” composite structure, obtained using the SPS method (sample № 1).
In the sample № 1 inside the intermetallic layers at the nickel interface the martensitic structure was found (Fig. 1,b).
These results are in good agreement with the data of [17], which reported that the martensitic structure is formed by rapid cooling of Ni-rich NiAl.
Online since: May 2018
Authors: Alvin Karlo Garcia Tapia, Phoebe Nicole G. Perez, Marvin U. Herrera, Paul Albert L. Sino
The molecular structure and morphology of the samples were observed.
The morphology of the deposited PAni-ES is non-uniform with fiber-like structures.
The non-uniform structures and aggregates created porous regions.
Gilbert: Pure Applied Chemistry Vol. 74 (2002), p. 857-67
Stejskal: Pure Applied Chemistry Vol. 83 (2011), p. 1803-1817
Online since: October 2010
Authors: Hong Yan Zhang, Bao You Liu, Yuan Yuan Wang, Fu Xiang Wei
Thus, the main functional groups and structure of the amino-functionalized ionic liquid can be identified and confirmed.
Thus inferred that split the number of points were accordant with the chemical environments of these hydrogen atoms in the structure of expected product.
Fig. 3 1H-NMR of ionic liquid 3a Above all, the structure of amino-functionalized ionic liquid was identified by UV, IR, and NMR.
The results showed that the structure of synthetic product coincided with the expected structure. 2.2 Properties of Amino-functionalized Ionic Liquids. 2.2.1 Thermostability.
In absorbing SO2, these amino-functionalized ionic liquids showed higher activity and super adsorption compared with the literature ionic liquids[6] (0.305g/g of the mass fraction), the application in absorbing SO2 meets with the requirement of green chemistry and has great industrial advantages in actual application (Table 4).
Online since: May 2011
Authors: Jing Liu, Guang Hua Zhang
Synthesis and Photoproperties of fluorescent brighteners modified by polyaminamide Jing Liu 1,2a Guang-hua Zhang 1b 1 Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education.Shaanxi University of Science & Technology, Xi'an 710021, China 2 College of Chemistry and Engineer, Xianyang Normal University, Xianyang 712000, China a liujing163@163.com, b zhanggh@sust.edu.cn Keywords: Polyaminamide, Triazinyl Aminostilbene Fluorescent Brighteners, Whiteness, Photoproperties, Modify.
It is necessary for the fluorescent brighteners to show the high fluorescence activity in a planar molecular structure with conjugated double bonds and electron-donating groups.
Poor photostability will be solved by polymeric fluorescent brighteners(PFBs).But the basic structure of chromogen in PFBs remains, so PFBs have fluorescent properties of the traditional FBs.
The synthetic polyaminamide fluorescent brighteners(PFBs) shows as Fig.1, the structure of substituents -R of PFBs were shown in Tab.1.
Fig.1 The synthetic process of the PFBs Tab. 1 The structure of substituents -R of PFBs PFBs 1 2 3 4 -R -NHC6H4SO3H(4’) –Morpholino -N(C2H4OH)2 -N(CH2CH3)2 Study of structure and photoproperties of PFBs UV-vis spectrophotometric investigations of the prepared products of polyaminamide fluorescent brightener (PFBs1-4) using aqueous and ethanol were performed on a spectrophotmeter.
Online since: January 2013
Authors: Veinardi Suendo, Ali Syari’ati
The size of the pillars that formed this porous structure is varied from 25 to 50 nm.
This technique was performed to reduce inhomogeneity of sponge structure on the surface of p-Si.
The surface of p-Si is filled with chunk-like crystallites instead of sponge structure (Fig. 5a-c).
These defective structures were formed through the formation of defects on the silicon surfaces.
Mukti, Department of Chemistry, Institut Teknologi Bandung - Indonesia for partial support on providing the substrates.
Online since: September 2011
Authors: Jin Qiang Liu, Chun Lei Xu, Yi Hu, Sheng Peng Wang, Shao Min Qu, Jian Hua Xu
The formation of core-shell structure was observed by transmission electron microscopy (TEM).
Dimethylol propionic acid (DMPA, 98%, Aladdin Chemistry Co.Ltd.) was dried under vacuum for 2h.
And from this photo we could see core-shell structure obviously.
This could also illustrate that acrylic-polyurethane composite emulsions synthetized had a type of heterogeneous structure, in other words the exist of core-shell structure.
The structures and properties of the products were examined by FT-IR, TEM and TGA.
Online since: January 2013
Authors: Qun Cui, Hu Qing Yao, Lu Shi, Zong Jian Liu, Hai Yan Wang
Effect of macropore structure on desorption diffusion performance of n-pentane on 5A zeolite Lu Shi, Zongjian Liu, Qun Cuia, Haiyan Wang and Huqing Yao College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China acuiqun@njut.edu.cn Keywords: 5A zeolite; macropore structure; desorption; diffusion Abstract.
Characterization of macropore structure.
Results and Discussion Porous structure of 5A zeolites.
This phenomenon primarily relates to the macropore structure of 5A zeolites.
Different macropore structure finally leads to different pore volume, namely 5A-3>5A-1>5A-2
Online since: April 2010
Authors: Robert E. Stahlbush, D. Kurt Gaskill, Joseph L. Tedesco, Rachael L. Myers-Ward, Orest J. Glembocki, Charles R. Eddy, Nadeemullah A. Mahadik, Syed B. Qadri, Dimitri A. Alexson
Structure of Inclusions in 4 o Offcut 4H-SiC Epitaxy N.
The structure of various inclusions in SiC epitaxial layers grown on 4 o offcut substrates was investigated using three advanced techniques.
Experimental Procedure: The epilayers were grown in an Aixtron/Epigress VP508 hot-wall chemical vapor deposition reactor using the standard chemistry of silane and propane.
These UVPL images show the same overall structure as the micro-Raman map in Fig. 1.
UVPL imaging over a range of emission wavelengths shows more of the internal structure of the inclusions.
Online since: July 2012
Authors: Sheng Gao Qin, Hong Li Wu, Mao Bin Tian, Jing Chun Wu, Shang Lin Yao
Fractal Characteristics of the Pore Structure of Low Permeability Sandstone Qin Sheng-gao1, Wu Hong-li1, Tian Mao-bin1, Wu Jing-chun2, Yao Shanglin3, 4 (1.
Pfeifer P. et al[5] has arrived at the conclusion by the molecular absorption method that fractal structures exist at the formation rock.
These features about this kind of pore structures affect the inside fluids distribution and flowing of multiple phases greatly.
This indicates the feasibility of description of the complicated pore structure by fractal theory for low permeability reservoirs.
Chemistry non-integral dimensions between two and three[J].
Online since: January 2011
Authors: Jing Lin, Tie Feng Zhang, Gui Wen Yu
The results showed that: nano-structured thin film was smooth and dense, The thin film was constituted by compact particles of SiO2, and there was no Fe in the films.
Anti-corrosion thin films didn’t change the macro-structure of the substrate materials.
In this paper, the nano-structured SiO2 thin films were prepared on surface carbon steel (Q235A) by PVD method and corrosion behavior of SiO2/ Q235A was studied.
Conclusion SiO2 thin film was prepared by RF magnetron sputtering method on the carbon steel substrate, nano-structured thin film was smooth and dense.
[7]S.Zhu,W.Kenji,I.Satoru,Chemistry of Materials,2002,14,p.266