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Online since: September 2019
Authors: Yan Xuan Ma, Jia Tong Liu, Meng Yao Li, Ya Qian Xu, Yingrui Zhang
The chemical structure as well as the thermal properties and the core content were characterized by Fourier transform infrared spectroscopy (FTIR) and Thermogravimetric analyzer (TGA) respectively.
Michaud, Processing and damage recovery of intrinsic self-healing glass fiber reinforced composites, Smart Materials & Structures, 25 (2016) 084012
Jia, Lasting and self-healing superhydrophobic surfaces by coating of polystyrene/SiO2 nanoparticles and polydimethylsiloxane,Journal of Materials Chemistry A, 2 (2014) 15001-15007
Yang, Robust microcapsules with polyurea/silica hybrid shell for one-part self-healing anticorrosion coatings, Journal of Materials Chemistry A, 2 (2014) 11614-11620
Chung, Repeatable self-healing of a microcapsule-type protective coating,Polymer Chemistry, 4 (2013) 4940-4947
Michaud, Processing and damage recovery of intrinsic self-healing glass fiber reinforced composites, Smart Materials & Structures, 25 (2016) 084012
Jia, Lasting and self-healing superhydrophobic surfaces by coating of polystyrene/SiO2 nanoparticles and polydimethylsiloxane,Journal of Materials Chemistry A, 2 (2014) 15001-15007
Yang, Robust microcapsules with polyurea/silica hybrid shell for one-part self-healing anticorrosion coatings, Journal of Materials Chemistry A, 2 (2014) 11614-11620
Chung, Repeatable self-healing of a microcapsule-type protective coating,Polymer Chemistry, 4 (2013) 4940-4947
Online since: February 2011
Authors: Long Fang Ren, Xue Chuan Wang, Bao Yuan He, Tao Tao Qiang, Xiang Luo
Preparation, Characterization of Silicone Succinate Ester and Its Application in Leather Industry
Taotao Qiang1, a, Xiang Luo1, b, Longfang Ren1, c, Xuechuan Wang1, d, ,
Baoyuan He1, e
1Key Laboratory of Chemistry and Technology for Light Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi’an Shaanxi, P.
The structure of the materials and PMPS were characterized by FTIR.
But the COD of hard-biodegradation took up such a big rate that it was necessary to use other methods which combined with physical and chemistry technique [15].
The molecular structure was characterized by FTIR.
[17] G.W.C. and S.C.Y.: Treatment of Wastewater from Leather-making Industry (Chemistry Industry Press, Beijing 2001).
The structure of the materials and PMPS were characterized by FTIR.
But the COD of hard-biodegradation took up such a big rate that it was necessary to use other methods which combined with physical and chemistry technique [15].
The molecular structure was characterized by FTIR.
[17] G.W.C. and S.C.Y.: Treatment of Wastewater from Leather-making Industry (Chemistry Industry Press, Beijing 2001).
Online since: September 2022
Authors: Jiří Kolisko, Petr Pokorný, Adam Zabloudil, Nikola Prodanovic, Karla Cech Barabaszova
The protection of metal parts against corrosion damage is one of the most comprehensive areas of industrial chemistry and a wide range of methods exists to protect the surface from corrosive stimulators, including phosphating.
Therefore, a larger number of crystallization cores is achieved, and thus the resulting surface is of higher quality and has a finer crystalline structure. 6) Phosphating - the activated surface is then exposed to a tempered bath containing phosphoric acid salts.
They form mixed coatings with different crystalline structure (especially phosphophyllite).
The grains in this structure are extremely tight, which increases the adhesion of the coatings and the resistance to undercorrosion.
Ultimately, this allows to significantly reduce the content of heavy metals, which are a risk factor for the environment, while maintaining the usual structure and properties of the resulting phosphate layer.
Therefore, a larger number of crystallization cores is achieved, and thus the resulting surface is of higher quality and has a finer crystalline structure. 6) Phosphating - the activated surface is then exposed to a tempered bath containing phosphoric acid salts.
They form mixed coatings with different crystalline structure (especially phosphophyllite).
The grains in this structure are extremely tight, which increases the adhesion of the coatings and the resistance to undercorrosion.
Ultimately, this allows to significantly reduce the content of heavy metals, which are a risk factor for the environment, while maintaining the usual structure and properties of the resulting phosphate layer.
Online since: December 2012
Authors: Hong Yan Ban, Yun Gao, Zhi Gang Fang, Ting Ting Gu
Introduction
Amorphous alloys possess the unique performance of magnetics, mechanics, electrics, and chemistry because of their characteristic of short-range order and long-rang disorder in structure.
The chemistry property of amorphous alloy TM-M would be dressed and ameliorated by adding the third metal[7].
Due to the characteristic, cluster models were an effective method to research the local structure of amorphous alloys.
All geometries of the most stable structures are triangle dipyramid.
It means the binary cluster models Fe4P and Ni4P could reflect the local structure of amorphous alloy Fe80P20 and Ni80P20 perfectly.
The chemistry property of amorphous alloy TM-M would be dressed and ameliorated by adding the third metal[7].
Due to the characteristic, cluster models were an effective method to research the local structure of amorphous alloys.
All geometries of the most stable structures are triangle dipyramid.
It means the binary cluster models Fe4P and Ni4P could reflect the local structure of amorphous alloy Fe80P20 and Ni80P20 perfectly.
Online since: June 2018
Authors: Grigory Ivanovich Yakovlev, Anastasiya Fedorovna Gordina, Valery Grakhov, Irina Sergeevna Polyanskikh, Zarina Saidova, Tatyana Plekhanova, Аleksandr F. Buryanov
For this purpose, it is necessary to evenly distribute the emerging crystal structure throughout the composite [16].
Batyanovsky, The effect of complex chemical additive, containing structured carbon nanomaterial, on the properties of cement.
Tretyakov, Self-organization processes in material chemistry, Chemistry Achievements. 72 (8) (2003) 731-758
Seleznev, Description of matrix structures of composite material.
Kozomazov, The structure and properties of high-filled constructional polymer composites, Abstract of PhD thesis, Moscow, 1997., 44 p
Batyanovsky, The effect of complex chemical additive, containing structured carbon nanomaterial, on the properties of cement.
Tretyakov, Self-organization processes in material chemistry, Chemistry Achievements. 72 (8) (2003) 731-758
Seleznev, Description of matrix structures of composite material.
Kozomazov, The structure and properties of high-filled constructional polymer composites, Abstract of PhD thesis, Moscow, 1997., 44 p
Online since: January 2015
Authors: Lusine Aloyan, Yeva Dalyan, Aleksey Gogolev
The mechanism of porphyrin binding with DNA depends on various factors like structure of DNA, porphyrin structure and properties of the solution.
A small change in the components and structure of peripheral radicals can alter the strength and mechanism of interaction.
Lando from the Institute of Bioorganic Chemistry (Minsk, Belarus).
Porphyrins were synthesized at the Department of Pharmacological Chemistry, Yerevan State Medical University by the method described in [5].
This can be explained by the fact that at a given relative concentration, these porphyrins intercalate in GC-regions, thereby causing local destabilization of the DNA structure at binding sites.
A small change in the components and structure of peripheral radicals can alter the strength and mechanism of interaction.
Lando from the Institute of Bioorganic Chemistry (Minsk, Belarus).
Porphyrins were synthesized at the Department of Pharmacological Chemistry, Yerevan State Medical University by the method described in [5].
This can be explained by the fact that at a given relative concentration, these porphyrins intercalate in GC-regions, thereby causing local destabilization of the DNA structure at binding sites.
Online since: July 2011
Authors: Ying Chen, Zhi Qiang Wan, Hong Jun Wu, Shu Zhi Liu, Xin Sui, Dan Dan Yuan, Bao Hui Wang
Surface Photovoltage: an Efficient Tool of Evaluation of Photocatalytical Activity of Materials
Baohui Wang*a, Zhiqiang Wan, Hongjun Wu, Shuzhi Liu, Ying Chen, Xin Sui and Dandan Yuan
Lab of New Energy Chemistry and Environmental Science, College of Chemistry & Chemical Engineering, Northeast Petroleum Univeristy, Daqing 163318, P.R.China
awangbaohui60@163.com
Keywords: Surface photovoltage; Photocatalysis; Titanium oxide; Activity
Abstract.
A case of evaluation of photocatalytical activity by SPV technique Based on the above analysis, the extracted concepts for evaluation of photocatalytic activity of materials SPV intensity are the following: (1) basically, a standard procedure is employed for SPV measurement; (2) it is necessary to create a suitable cell structure of semiconductor; (3) the measuring procedure and cell are practically same for all the materials; (4) the materials are required with the similar light absorption and structure factor.
Fig.1 Surface photovoltage spectroscopy of TiO2 with different crystal structure Fig.2 Photocatalytic activity of TiO2 with different crystal structure In order to the further experimental measurements, TiO2/phenol photocatalytical system is therefore chosen as a model case for the investigation following the above ideas and concepts because TiO2 features predominantly in past and present work on photocatalysis.
The TiO2 catalysts occur in three cases of crystal structure, particle size and doping metal in the below experiments.
Crystal structure of TiO2 Fig.1 and Fig.2 experimentally show the SPV response and photocatalytic curves of TiO2 catalysts with different crystal structure for gradation of phenol molecules.
A case of evaluation of photocatalytical activity by SPV technique Based on the above analysis, the extracted concepts for evaluation of photocatalytic activity of materials SPV intensity are the following: (1) basically, a standard procedure is employed for SPV measurement; (2) it is necessary to create a suitable cell structure of semiconductor; (3) the measuring procedure and cell are practically same for all the materials; (4) the materials are required with the similar light absorption and structure factor.
Fig.1 Surface photovoltage spectroscopy of TiO2 with different crystal structure Fig.2 Photocatalytic activity of TiO2 with different crystal structure In order to the further experimental measurements, TiO2/phenol photocatalytical system is therefore chosen as a model case for the investigation following the above ideas and concepts because TiO2 features predominantly in past and present work on photocatalysis.
The TiO2 catalysts occur in three cases of crystal structure, particle size and doping metal in the below experiments.
Crystal structure of TiO2 Fig.1 and Fig.2 experimentally show the SPV response and photocatalytic curves of TiO2 catalysts with different crystal structure for gradation of phenol molecules.
Online since: September 2013
Authors: Josip Brnic, Marko Canadija, Marino Brcic
The nanotube inside of the RVE in this paper is modelled as a space frame structure.
Several models of nanocomposite structure, with directional oriented RVE-s have been presented.
The nanotube inside the RVE is modelled as a space frame structure, using the beam finite elements.
Sun: Journal of Physics and Chemistry of Solids 61 (2000), p.1153 [4] J.P.
Rafiee: Composite Structures 92 (2010), p.647 [12] M.
Several models of nanocomposite structure, with directional oriented RVE-s have been presented.
The nanotube inside the RVE is modelled as a space frame structure, using the beam finite elements.
Sun: Journal of Physics and Chemistry of Solids 61 (2000), p.1153 [4] J.P.
Rafiee: Composite Structures 92 (2010), p.647 [12] M.
Online since: January 2011
Authors: You Gang Cheng, Yu Yue Chen, Chun Xia Wang, Wei Zhang
The aggregation structure of silk fiber and the antibacterial performance and dyeing behavior of silk fabric treated by HTCC were investigated.
However, the high-crystalline structure of chitosan causes the difficulty in dissolving in water or organic solvents, which affects its applications.
It was because of erosion effect of citric acid on weak structure of silk fiber during the treatment.
It indicated that there was no significant change on aggregation structure of silk fibers during treatment.
Acknowledgements Financial support for this work was provided by the Jiangsu province applied chemistry key discipline project of opening fund (XKY2009024).
However, the high-crystalline structure of chitosan causes the difficulty in dissolving in water or organic solvents, which affects its applications.
It was because of erosion effect of citric acid on weak structure of silk fiber during the treatment.
It indicated that there was no significant change on aggregation structure of silk fibers during treatment.
Acknowledgements Financial support for this work was provided by the Jiangsu province applied chemistry key discipline project of opening fund (XKY2009024).
Online since: September 2014
Authors: Dannylo Thadeu Gomes, Francisco José Correa Braga, Benedito de Moraes Purquerio, Carlos Alberto Fortulan, Camila Roberta de Meira
The bovine hydroxyapatite has great similarity with the human bone structure, making it able for a direct connection with the bone tissues.
The bands at 3569 and 630 cm-1 are related to the vibration of OH group characteristic of the structure of hydroxyapatite.
Kmita: Journal of Molecular Structure Vol. 555 (2000), p. 375
Rój: Journal of Molecular Structure Vol. 651–653 (2003), p. 389
Sontang: Physics and Chemistry Vol. 81 (2012), p. 118.
The bands at 3569 and 630 cm-1 are related to the vibration of OH group characteristic of the structure of hydroxyapatite.
Kmita: Journal of Molecular Structure Vol. 555 (2000), p. 375
Rój: Journal of Molecular Structure Vol. 651–653 (2003), p. 389
Sontang: Physics and Chemistry Vol. 81 (2012), p. 118.