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Online since: July 2012
Authors: Ying De Cui, Qi Hai Liu, Xin Hua Zhou, Guo Qiang Ying
Attapulgite is the silicate mineral with magnalium in the chain-layer structure.
SEM analysis.The surface morphology and structure of drug-loaded gel microsphere is shown in Fig. 2.
Sodium alginate drug-loaded gel microsphere has a calcium cross-linked network structure.
This is because the lamellar structure in attapulgite increased the body resistance to the spreading of pesticides, and the hydrogen bond between attapulgite and alginic acid enhances the cross-linked network density, both promoting the deceleration.
We gratefully acknowledge the support by College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering in China.
SEM analysis.The surface morphology and structure of drug-loaded gel microsphere is shown in Fig. 2.
Sodium alginate drug-loaded gel microsphere has a calcium cross-linked network structure.
This is because the lamellar structure in attapulgite increased the body resistance to the spreading of pesticides, and the hydrogen bond between attapulgite and alginic acid enhances the cross-linked network density, both promoting the deceleration.
We gratefully acknowledge the support by College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering in China.
Online since: October 2006
Authors: W.C. Mitchel, W.E. Collins, Wei Jie Lu, John Boeckl, J. Rigueur
Multi-wall carbon nanotubes and graphitic structures are the main
products on the SiC surface at 1400-1800°C in 10
-5
torr.
Results and discussion Figure 1 shows that multi-wall CNTs and graphitic structures are the main products on SiC grown at 1700°C and at 10 -5 torr using TEM.
The D-band at 1330 cm-1 with the laser excitation line of 632.5 cm-1 and the G-band at 1580 cm-1 are characteristic for graphitic structures [11,12].
The structure of the C-O compound needs to be further investigated.
Acknowledgment The authors at Fisk University acknowledge support from ONR (N00014-03-1-0843) and NSF through the Fisk Center of Physics and Chemistry of Materials (HRD-0420516).
Results and discussion Figure 1 shows that multi-wall CNTs and graphitic structures are the main products on SiC grown at 1700°C and at 10 -5 torr using TEM.
The D-band at 1330 cm-1 with the laser excitation line of 632.5 cm-1 and the G-band at 1580 cm-1 are characteristic for graphitic structures [11,12].
The structure of the C-O compound needs to be further investigated.
Acknowledgment The authors at Fisk University acknowledge support from ONR (N00014-03-1-0843) and NSF through the Fisk Center of Physics and Chemistry of Materials (HRD-0420516).
Online since: January 2013
Authors: Rong Hua Ma, Ying Wang, Xue Hua Ma, Cheng Xin Ma
Preparation and Properties of Micro /Nano-Structural Polyaniline Doped with α-SiW11Co
Ronghua Maa, Ying Wangb , Xuehua Mac and Chengxin Mad
College of chemistry and engineering, qiqihar university, qiqihar 161006, China
amrh1963@163.com, bwjmrh@sohu.com, cbenkelunwen408@126.com, bqdmrh@sohu.com
Keywords: Polyaniline, Silicotungstat, Fluorescence property, Conductivity.
The structure and morphology of Micro/nano-structural polyaniline were characterized by means of IR, UV-Vis spectrum, XRD pattern and SEM images.
Because nanomaterials with their inherent anisotropy are the smallest dimension structures that can be used for efficient transport of electrons and optical excitations.
Wang, Synthesis and properties of polyaniline doped with cobalt substituted silicotungstate isomers with Keggin structure, Chin.
Xu, Introduction to Polyoxometallate Chemistry, first ed, Chemistry Industry Press, Beijing, 1998
The structure and morphology of Micro/nano-structural polyaniline were characterized by means of IR, UV-Vis spectrum, XRD pattern and SEM images.
Because nanomaterials with their inherent anisotropy are the smallest dimension structures that can be used for efficient transport of electrons and optical excitations.
Wang, Synthesis and properties of polyaniline doped with cobalt substituted silicotungstate isomers with Keggin structure, Chin.
Xu, Introduction to Polyoxometallate Chemistry, first ed, Chemistry Industry Press, Beijing, 1998
Online since: July 2021
Authors: K.G. Karapetyan, Olga V. Denisova
The internal porous structure of the sorbent is shown in the photo (Fig. 1, b), obtained using an electron microscope.
Foamed glassy phosphate material (a), internal porous structure of a sorbent (b) The glasses for biosorbents were synthesized at 1200 - 1300°C in a system (К2О-СаО-МgО-Р2О5) from a furnace in quartz crucibles for one hour with stirring.
The presented results require deeper physicochemical studies of the effect of composition, formation and structure of the glassy sorbent on the activity of microorganisms immobilized on their surface and the rate of biochemical processes taking place with their participation.
Shakhparonova, Chemistry as a basis for solving environmental issues, Journal of Mining Institute 224 (2017) 223-228
Kosarev, Synthesis of foamed glass based on slag and a glycerin Pore-forming mixture, Glass Physics and Chemistry 44(2) (2018) 152–155
Foamed glassy phosphate material (a), internal porous structure of a sorbent (b) The glasses for biosorbents were synthesized at 1200 - 1300°C in a system (К2О-СаО-МgО-Р2О5) from a furnace in quartz crucibles for one hour with stirring.
The presented results require deeper physicochemical studies of the effect of composition, formation and structure of the glassy sorbent on the activity of microorganisms immobilized on their surface and the rate of biochemical processes taking place with their participation.
Shakhparonova, Chemistry as a basis for solving environmental issues, Journal of Mining Institute 224 (2017) 223-228
Kosarev, Synthesis of foamed glass based on slag and a glycerin Pore-forming mixture, Glass Physics and Chemistry 44(2) (2018) 152–155
Online since: April 2009
Authors: Xue Gang Luo, Ling Li, Yan Huang, Zhao Liu, Yi Li
The analysis of FT-IR spectrum, GPC and DSC indicated that the type
of lignin extracted by citric acid was G-S, and the lignin was characterized as complete structure,
higher molecular weight and Tg.
Due to its complicated in structure and difficult in degradation, Lignin becomes the main biological contamination in lignocellulose processing industry [1,2].
The analysis of FT-IR spectrum, GPC and DSC indicated that the type of this lignin was G-S and the lignin with comparatively complete structure.
Jiang, in: Lignin (Chemistry Industry Publications, Beijing 2001)
Luo, in: Study on extraction of high purified lignin and its thermoplastic modification (Chemistry Industry Publications, Beijing 2007)
Due to its complicated in structure and difficult in degradation, Lignin becomes the main biological contamination in lignocellulose processing industry [1,2].
The analysis of FT-IR spectrum, GPC and DSC indicated that the type of this lignin was G-S and the lignin with comparatively complete structure.
Jiang, in: Lignin (Chemistry Industry Publications, Beijing 2001)
Luo, in: Study on extraction of high purified lignin and its thermoplastic modification (Chemistry Industry Publications, Beijing 2007)
Online since: July 2019
Authors: Pusit Pookmanee, Sukon Phanichphant, Jiratchaya Tafun, Viruntachar Kruefu, Suchanya Kojinok, Pimpaka Sangthep
The structure was identified by X-ray diffractometer (XRD).
Microwave assisted synthesis not only helps in implementing green chemistry but also led to the revolution in organic synthesis.
The structure was confirmed by comparison with the Joint Committee on Powder Diffraction Standard (JCPDS) Card File No. 48-1548 [10].
Monoclinic single phase of CuO structure was obtained without calcination steps.
Acknowledgments This research was financially supported by the National Research Council of Thailand (NRCT), the Department of Chemistry, and the Nanoscience and Nanotechnology Research Laboratory (NNRL), Faculty of Science, Maejo University, Chiang Mai, Thailand.
Microwave assisted synthesis not only helps in implementing green chemistry but also led to the revolution in organic synthesis.
The structure was confirmed by comparison with the Joint Committee on Powder Diffraction Standard (JCPDS) Card File No. 48-1548 [10].
Monoclinic single phase of CuO structure was obtained without calcination steps.
Acknowledgments This research was financially supported by the National Research Council of Thailand (NRCT), the Department of Chemistry, and the Nanoscience and Nanotechnology Research Laboratory (NNRL), Faculty of Science, Maejo University, Chiang Mai, Thailand.
Online since: November 2016
Authors: Masato Senami, Kazuhide Ichikawa, Akitomo Tachibana, Hiroo Nozaki
We discuss the use of tension density for analyzing the electronic structure of a molecular system in a nonequilibrium steady state under the existence of electric current.
We perform the CPHF computation after deriving the unperturbed electronic structure via usual self-consistent field (SCF) computation, which in turn is done by Gaussian 09 program package [14].
We optimize using the Hartree-Fock method for the structure of BDT without electrode atoms.
In Fundamental World of Quantum Chemistry, A Tribute to the Memory of Per-Olov Löwdin, E.
In Concepts and Methods in Modern Theoretical Chemistry, S.
We perform the CPHF computation after deriving the unperturbed electronic structure via usual self-consistent field (SCF) computation, which in turn is done by Gaussian 09 program package [14].
We optimize using the Hartree-Fock method for the structure of BDT without electrode atoms.
In Fundamental World of Quantum Chemistry, A Tribute to the Memory of Per-Olov Löwdin, E.
In Concepts and Methods in Modern Theoretical Chemistry, S.
Online since: January 2012
Authors: Hua Peng Zhang, Xin Xing Feng, Hai Lin Zhu, Jian Yong Chen
Effects of Polar Solvent on the Structure and
Properties of m-Aramid Fibers
Huapeng ZHANG1,2,a, Xinxing FENG1,2, Hailin ZHU1 and Jianyong CHEN1,2
1Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China
2Engineering Research Center for Eco-Dyeing & Finishing of Textiles, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China
aroczhp@163.com
Keywords: Structure; Properties; DMSO treatment; M-aramid fiber; Dyeability
Abstract.
Electron diffraction shows that effects of DMSO on the fiber structure is non-uniform, and the obvious structural changes lie on the outer surface of the fiber.
As for structure and property characterization, the samples were dried for 30 minutes at 80 oC under vacuum after centrifuging.
Fig. 5 Dye uptake curves of m-aramid fiber with different DMSO treatment conditions 4 Conclusions The structures and properties of DMSO treated m-aramid fibers are studied.
Acknowledgements The authors would like to express their sincere thanks to Zhejiang Provincial Top Key Academic Discipline of Applied Chemistry and Eco-Dyeing & Finishing Engineering.
Electron diffraction shows that effects of DMSO on the fiber structure is non-uniform, and the obvious structural changes lie on the outer surface of the fiber.
As for structure and property characterization, the samples were dried for 30 minutes at 80 oC under vacuum after centrifuging.
Fig. 5 Dye uptake curves of m-aramid fiber with different DMSO treatment conditions 4 Conclusions The structures and properties of DMSO treated m-aramid fibers are studied.
Acknowledgements The authors would like to express their sincere thanks to Zhejiang Provincial Top Key Academic Discipline of Applied Chemistry and Eco-Dyeing & Finishing Engineering.
Online since: July 2011
Authors: Zhi Juan Pan, Lei Gen Liu
The morphology structure, hydrophilicity and mechanical properties of treated samples were studied by scanning electron microscopy(SEM), dataphysics OCA contact angle system and instron 3365 mechanical testing machine.
Results and discussion Hydrophilic modification principle The wettability of the fiber mat depends on the fiber wettability and structure size of itself.
PSF is hydrophobic, and the molecular structure is shown in Fig. 1( a).The hydroxyl group is easily generated under the action of strong oxidizer (NH4)2S2O8 shown in Fig. 1(b), then further oxidize is to easily get aldehyde group or carboxyl group as shown in Fig. 1 (c), at last its hydrophilic was improved.
Polymer Science: Part A Polymer Chemistry. 1996, 34, 1385-1393
Applied Chemistry. 2008,25(30):282-284, in chinese.
Results and discussion Hydrophilic modification principle The wettability of the fiber mat depends on the fiber wettability and structure size of itself.
PSF is hydrophobic, and the molecular structure is shown in Fig. 1( a).The hydroxyl group is easily generated under the action of strong oxidizer (NH4)2S2O8 shown in Fig. 1(b), then further oxidize is to easily get aldehyde group or carboxyl group as shown in Fig. 1 (c), at last its hydrophilic was improved.
Polymer Science: Part A Polymer Chemistry. 1996, 34, 1385-1393
Applied Chemistry. 2008,25(30):282-284, in chinese.
Online since: June 2024
Authors: Noor Mohammed Jalal, Dakheel Zainab Abdali, Shaker Mahmood Roaa
Introduction
Proton exchange membranes, sometimes called polymeric electrolyte membranes, are solid electrolytes based on a polymeric structure allow only the passage of hydrogen ions (H+) through its special structure and exerts electrons [1].
This research aims firstly to prepare polymeric membranes from low cost recycled Styrofoam wastes, modifying the chemical structure of polymeric chain to permits the transformation of (H+) through polymeric structure .
Therefore the proton conductivity will be increased due to increasing [H+] movement through the sulfonated polymeric structure.
,A Molecular Dynamic Simulation of Hydrated Proton Transfer in Perfluorosulfonate Ionomer Membranes (Nafion117), , Hindawi, Journal of Chemistry, 10, (2015)
Gonzalez Benito, New Molecular-Scale Information on Polystyrene Dynamics in PS and PS–BaTiO3 Composites From FTIR Spectroscopy, PCCP Royal Society of Chemistry, 16, (2014)
This research aims firstly to prepare polymeric membranes from low cost recycled Styrofoam wastes, modifying the chemical structure of polymeric chain to permits the transformation of (H+) through polymeric structure .
Therefore the proton conductivity will be increased due to increasing [H+] movement through the sulfonated polymeric structure.
,A Molecular Dynamic Simulation of Hydrated Proton Transfer in Perfluorosulfonate Ionomer Membranes (Nafion117), , Hindawi, Journal of Chemistry, 10, (2015)
Gonzalez Benito, New Molecular-Scale Information on Polystyrene Dynamics in PS and PS–BaTiO3 Composites From FTIR Spectroscopy, PCCP Royal Society of Chemistry, 16, (2014)