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Online since: August 2018
Authors: Mary Donnabelle L. Balela, Luigi A. Dahonog
The phase composition and crystalline structure were determined using X-Ray diffraction (XRD SHIMADZU MAXima XRD-7000).
When viewed at higher magnification, these nanowires formed urchin-like structures as shown in the inset found on the upper right corner of Figure 2a.
These urchin-like structures were found to be dispersed on the surface of the carbon fiber.
With increasing hydrothermal time, these nanowires became denser with urchin-like structures.
Nickel–cobalt oxides supported on Co/N decorated graphene as an excellent bifunctional oxygen catalyst, Journal of Materials Chemistry A 5 (2017) 5594-5600 [11] X.Ton, S.
Online since: April 2021
Authors: Vyacheslav Barakhtenko
Studying the shape of particles is important because this indicator affects the structure, properties and technological parameters of the preparation of polymer composites [14, 15].
[6] Krehula, LK Influence of calcium carbonate filler and mixing type process on structure and properties of styrene-acrylonitrile / ethylene-propylene-diene polymer blends / LK Krehula, AP Siročić, Z.
Zagorodnikov // Mechanics of composite materials and structures. - 2012. - T. 18, No. 1. - S. 16–34
Osipchik // Advances in Chemistry and Chemical Technology - 2004. - V. 18. - No. 3 (43). - S. 15-17
[15] Krehula, LK Influence of calcium carbonate filler and mixing type process on structure and properties of styrene-acrylonitrile / ethylene-propylene-diene polymer blends / LK Krehula, AP Siročić, Z.
Online since: May 2011
Authors: Chao Can Zhang, Ou Sheng Zhang, Liang Hu
Introduction Controlling the structure of a polymeric material to get a desired property has been one of the main goals of polymer chemistry, because structure and performance are closely interrelated.
In the field of coatings, more than three layers are frequently encountered with vertical structure, so multistep layer-by-layer deposition is a straightforward way of producing these vertically structured coatings.
Likewise, more silicon-containing component enriches near the F–A interface for BS3 film than those for BS1 film, although only partial gradient distribution of silicon can be seen, probably because both blend components with similar Tg have no stark difference in film-formation ability which causes gradient structure formation difficulties due to the lack of a driving force.
Online since: September 2013
Authors: Hong Xia Xiao, Rui Xiang Fan
Introduction Microgrid is a complicated nonlinear system, coupled with chemistry, thermodynamics, electrodynamics and any others, in which a variety of energy input (solar energy, wind energy, conventional fossil fuels, biomass energy, etc), load characteristics, and energy conversion units (fuel cells, micro gas turbines, internal combustion engine, energy storage system, etc) are integrated.
Fig.1 Topological structure of CERTS Comparison of APF parallel operation programs a) Program of centralized current control Fig. 2 Parallel operation program 1 As shown in Fig.2, the current signal detected by current sensor is processed by a centralized controller and then assigned to each APF module.
So a new APF parallel operation system structure is proposed in this paper, as shown in Fig.5.
Here, we do not consider the internal structure of the micro-source, and only pay attention to its external characteristics.
The main circuit adopts three-phase three-bridge arm structure.
Online since: January 2009
Authors: Wei Na, Qi Wei, Ze Chang Zou, Qun Yan Li, Zhi Hong Wang, Zuo-Ren Nie
TEM image of MCFs shows a disordered mesostructured cells (Figure 1), which consistent with the structure features of MCFs reported by previous studies [15-16].
This special pore structure of the MCFs has been proved to be an advantage for enzyme immobilization [17].
Second, three dimensional and interconnected pore structure facilitate mass transfer and molecular diffusion.
However, most of these reports have focus on different mesoporous materials with various pore structures and sizes or mesoporous materials with smaller size that can only be accommodated small molecules.
References [1] Peter W.Carr: Imobilization enzymes in analytical and clinical chemistry: fundaments and applications (Wiley, New York 1980)
Online since: September 2014
Authors: A.I. Galanov, O.A. Guselnikova, M.V. Gromov
FT-IR spectroscopy in KBr pellets of the resultant samples was performed in order to examine the structure of the obtained NPs-coated ADT.
The comparison study of the IR spectra shows a significant difference in the structure of Fe-NPs surfaces.
The resultant Fe-NPs with an average particle size of 10 microns possess an oxidation resistance and keep the structure in the air.
Chi, Unusually Stable, Versatile, and Pure ArenediazoniumTosylates: Their Preparation, Structures, and Synthetic Applicability, Org.
&qsSearchArea=author"Hadjipanayis, Chemistry of Borohydride Reduction of Iron(II) and Iron(II1) Ions in Aqueous and Nonaqueous Media.
Online since: April 2012
Authors: Soo Kai Wai, Ahmad Haji Sahrim, Syazana Ahmad Zubir
The rich intercalation chemistry of nanoclay allows it to be chemically modified to be more compatible with polymers [6].
On the other hand, the disruption in the PU system of PU-5 could create a disorder in the cellular structure [9].
Specifically, the smooth structure of the controlled PU was captured in Fig. 3(a).
Fig. 3 (b) and 3 (c), on the other hand demonstrated the structures of the nanoclays which were nicely embedded in the matrix.
Furthermore, Fig. 3 (d) captured the rupture of the cell structure and significant agglomeration.
Online since: April 2012
Authors: J.P.M. Miguens, W.C. Souza, H.L. Corrêa, M.A.G. Figueiredo
Center for Technology and Sciences - Institute of Chemistry.
Being a volcanic clay, bentonite is characterised by being composed primarily of montmorillonite, a clay mineral group of esmectite that has a lamellar structure capable of allowing its expansion when hydrated.
Note, also, considerable reduction of aluminium and iron, whose cations are a constituent part of the octahedral structure of the clay [7].
The SiO2/Al2O3 ratio increased after acid treatment, indicating that there was an increase in the amount of silicon and aluminium extraction from the structure [4].
The largest capacity of removal of nitrogen compounds is probably due to the generation of acid sites generated in the clay structure, allowing greater interaction between them and the basic nitrogen compounds.
Online since: June 2012
Authors: Zhi Gang Liu, Yan Lan Qin, Ju Sheng Zhang, Qian Lan Rao, Jing Jing Xu
The surface of pure coal tar coating film shows gray matt, looks like a simple and neat lattice structure.
The resulting film can form three-dimensional network-like structure.
In the structure, TDI plays an important role that link epoxy resin and film-forming material.
Materials and Structures. 2011, 44(3): 611-622
FTIR-ATR studies of interfacial interactions in epoxy resin/polymer laminate structures.
Online since: May 2011
Authors: Zeng Yong Chu, Wei Xie, Hai Feng Cheng, Jia Cai Kuang, Chun Guang Long
Hollow carbon fibers (HCFs), with dual-layer structure, have been considered to be a promising candidate in the microwave absorbing materials field [4-6].
The parallel experiment was designed to investigate their specific structure in comparison with general carbon fibers.
The HCF has an asymmetric structure with a lot of irregular micropores.
Its structure differs from that of general carbon fiber.
Study on the structure and properties of Polyacrylonitrile-based activated hollow carbon fiber.