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Online since: March 2013
Authors: Shi Zhou, Bing Zhou, Chun Ying Huang, Jia Jun Chen
Feature of nano particle is analyzed and tested by scanning electron microscope; Fourier infrared spectrum of nanoparticle and composite is tested by fourier infrared spectrometer under room temperature; thermal property test is conducted to composite by thermogravimetric analyzer; XRD test is conducted to nanoparticle and compound thin-film material by X-ray diffractometer; mechanical property of composite is tested by universal stretcher, proving that titanium dioxide does not change structure of WPU and titanium dioxide keeps the original crystal structure instead of being destroyed.
The infrared titanium dioxide changes slightly after adding titanium dioxide, proving that it does not change the structure of WPU.
In the composite, there is a diffraction peak in XRD Figure and it is basically identical with the characteristic peak of TiO2, proving that structure of TiO2 keeps the original crystal form instead of being destroyed
It raises mechanical properties, thermostability and antibiotic property of WPU and inner structures of inorganic filling nanometer titanium dioxide and organic matrix WPU are not changed.
Application of Spectral Analytical Method in Organic Chemistry [M].
The infrared titanium dioxide changes slightly after adding titanium dioxide, proving that it does not change the structure of WPU.
In the composite, there is a diffraction peak in XRD Figure and it is basically identical with the characteristic peak of TiO2, proving that structure of TiO2 keeps the original crystal form instead of being destroyed
It raises mechanical properties, thermostability and antibiotic property of WPU and inner structures of inorganic filling nanometer titanium dioxide and organic matrix WPU are not changed.
Application of Spectral Analytical Method in Organic Chemistry [M].
Online since: November 2011
Authors: Yong Hong Lu, Yan Hua Wang, Lian Zhong
Synthesis, characterization and corrosion protection properties of polyaniline/TiO2 nanocomposite
Lian zhong a, Yanhua Wangb and Yonghong Luc
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China
azhonglian0705@163.com, bwyhazz@163.com, clazake@163.com
Keywords: anticorrosion, polyaniline, Nano-composite, Titanium dioxide, Coating
Abstract.
In this study, conductive polyaniline (PANi)–titania (TiO2) nanocomposites with core–shell structure were prepared and their anticorrosion properties were investigated.
The morphology and structure of the polymer nanocomposite was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), respectively.
Results and discussion Morphology and structure of the PANi/nano- TiO2 composite Fig. 1a and b reveal scanning electron microscope (SEM) images of the unmodified TiO2 nanoparticles and the polyaniline coated TiO2 nanoparticles.
SEM micrograph show that the PANi/ nano-TiO2 composite has a core–shell structure.
In this study, conductive polyaniline (PANi)–titania (TiO2) nanocomposites with core–shell structure were prepared and their anticorrosion properties were investigated.
The morphology and structure of the polymer nanocomposite was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), respectively.
Results and discussion Morphology and structure of the PANi/nano- TiO2 composite Fig. 1a and b reveal scanning electron microscope (SEM) images of the unmodified TiO2 nanoparticles and the polyaniline coated TiO2 nanoparticles.
SEM micrograph show that the PANi/ nano-TiO2 composite has a core–shell structure.
Online since: July 2011
Authors: Yan Yao, Ling Wang, Hao Wu
Interfacial transition zone (ITZ) is the weakest part in concrete structure because of the interrelation between its special characters and the performance of concrete, and adding mineral admixture in concrete is a feasible and effective way to improve ITZ.
Material and scheme design Row material The chemistry analysis results of cement and FA are shown in table 1.
Table 1 Chemistry analysis results of cement and FA Row material Loss SiO2 AlO3 Fe2O3 CaO MgO SO3 Total FA 4.38 53.94 30.91 2.38 2.86 1.93 0.94 97.34 sulphate aluminium cement 5.09 6.00 30.94 2.56 38.14 2.21 12.20 97.14 The CaO, Alkali and sodium sulphate (SS) content of burnt lime, industrial sodium hydroxide and sodium sulphate are 96%, 96 % and 95% respectively.
According to the comprehensive results, sample 5 was selected to do SEM and EDS analysis with the aim to research its ITZ structure, component and location based on the elements distribution.
C-S-H gels interlaced with coal gangue to form good structure with powerful adhesive force in ITZ, and on this condition, the interfacial structure was improved with enhanced adhesive force.
Material and scheme design Row material The chemistry analysis results of cement and FA are shown in table 1.
Table 1 Chemistry analysis results of cement and FA Row material Loss SiO2 AlO3 Fe2O3 CaO MgO SO3 Total FA 4.38 53.94 30.91 2.38 2.86 1.93 0.94 97.34 sulphate aluminium cement 5.09 6.00 30.94 2.56 38.14 2.21 12.20 97.14 The CaO, Alkali and sodium sulphate (SS) content of burnt lime, industrial sodium hydroxide and sodium sulphate are 96%, 96 % and 95% respectively.
According to the comprehensive results, sample 5 was selected to do SEM and EDS analysis with the aim to research its ITZ structure, component and location based on the elements distribution.
C-S-H gels interlaced with coal gangue to form good structure with powerful adhesive force in ITZ, and on this condition, the interfacial structure was improved with enhanced adhesive force.
Online since: June 2005
Authors: W.W. Lu, F. Chen, L.W. Lin, Chang-Jian Lin
Lu2
1, 2State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen
University, Xiamen 361005, China
2
Department of Orthopaedic Surgery, Hong Kong University, Hong Kong, China
a
cjlin@xmu.edu.cn
Keywords: Nano coatings; Hydroxyapatite; Electrophoretic deposition; Bonding strength
Abstract Hydroxyapatite (Ca10(PO4)6(OH)2, HAp) is biocompatible and bioactive, however, it is
relatively brittle.
In the present study, a HAp coating with nano-structure on a roughened titanium surface was developed by electrophoretic deposition process.
After sintering the HAp coating still remained nano structured.
The design of biomaterials with a nano structure that simulates the mechanical properties, surface topography and chemical characteristics of natural bone will be of help for the development of orthopaedics.
Conclusion A HAp coating with nano structure was prepared on Ti substrates by electrophoretic deposition (EPD).
In the present study, a HAp coating with nano-structure on a roughened titanium surface was developed by electrophoretic deposition process.
After sintering the HAp coating still remained nano structured.
The design of biomaterials with a nano structure that simulates the mechanical properties, surface topography and chemical characteristics of natural bone will be of help for the development of orthopaedics.
Conclusion A HAp coating with nano structure was prepared on Ti substrates by electrophoretic deposition (EPD).
Online since: April 2007
Authors: Guo Zhong Cao, H.M. Shang, Ying Wang
A combination of electrostatic forces, Brownian motion and osmotic forces
would result in the formation of a so-called double layer structure.
First, the nanoclusters or particles in the sol must have a crystalline structure extended to the surface.
Scherer: Sol-Gel Science: the Physics and Chemistry of Sol-Gel Processing (Academic Press, San Diego 1990)
Sommerdijk: Sol-Gel Materials: Chemistry and Applications (Gordon and Breach, Amsterdam 2001)
Everett: Basic Principles of Colloid Science (the Royal Society of Chemistry, London 1988)
First, the nanoclusters or particles in the sol must have a crystalline structure extended to the surface.
Scherer: Sol-Gel Science: the Physics and Chemistry of Sol-Gel Processing (Academic Press, San Diego 1990)
Sommerdijk: Sol-Gel Materials: Chemistry and Applications (Gordon and Breach, Amsterdam 2001)
Everett: Basic Principles of Colloid Science (the Royal Society of Chemistry, London 1988)
Online since: December 2006
Authors: Jing Huang, Jin Qing Li, Chuan Xiao, Qing Ming Zhang
And the damage effect is structure
damage or function damage.
If the fragment impact can't initiate the charge, and the impedance of fragment is higher than that of charge, the friction between fragment and charge can bring the chemistry reaction of the charge during the penetration progress.
So it can reach the effect of structure damage or function damage
In these four groups of experiments, firstly the whole structure is destroyed, then disjointed, and finally detonated.
And the damage form is changed from structure damage to function damage
If the fragment impact can't initiate the charge, and the impedance of fragment is higher than that of charge, the friction between fragment and charge can bring the chemistry reaction of the charge during the penetration progress.
So it can reach the effect of structure damage or function damage
In these four groups of experiments, firstly the whole structure is destroyed, then disjointed, and finally detonated.
And the damage form is changed from structure damage to function damage
Online since: December 2024
Authors: Siti Sarah Aliah Mohd Najib, Lee Wei Ann, Mohd Nazri Mohd Sokri, Norhana Mohamed Rashid, Mohd Zamri Mohd Yusop
Structure of graphene and its disorders: a review.
Synthesis of graphene from biomass: a green chemistry approach.
Journal of Materials Chemistry A. 2015;3(44):21968-89. https://doi.org/10.1039/c5ta04822b [14] S Maulina and M Iriansyah.
Materials Chemistry Frontiers. 2021;5(14):5319-27
Industrial & Engineering Chemistry Research. 2020;59(49):21393-402. https://doi.org/10.1021/acs.iecr.0c04531 [30] Garba A, Basri H, Nasri NS.
Synthesis of graphene from biomass: a green chemistry approach.
Journal of Materials Chemistry A. 2015;3(44):21968-89. https://doi.org/10.1039/c5ta04822b [14] S Maulina and M Iriansyah.
Materials Chemistry Frontiers. 2021;5(14):5319-27
Industrial & Engineering Chemistry Research. 2020;59(49):21393-402. https://doi.org/10.1021/acs.iecr.0c04531 [30] Garba A, Basri H, Nasri NS.
Online since: May 2024
Authors: Affoué Tindo Sylvie Konan, Ousmaila Sanda Mamane, Kouassi Benjamin Yao, Maâzou Siragi Dounounou Boukari, Horo Kone, Guy Didier Fanou, Maman Mousbahou Malam Alma, Maman Hamissou Ibrahim Grema, Mahamane Nassirou Amadou Kiari
It is characterized by its surface chemistry and textural properties that give them the property to adsorb [8-12].
It allows to obtain activated carbons of good quality and developing important pore structures with large specific surfaces [5].
Bamba, «Elimination of diuron from waters by techniques using natural resources of the Ivory Coast: solar photocatalysis and activated carbon of coconut shells", These of Doctorate Chemistry-Physics, University of Cocody Abijan, 2009
Aboua Kouassi, «Optimisation par le plan Factoriel complet des conditions de production de charbon actif et utilisation pour l'élimination de colorant et métaux lourds en solutions aqueuses", These of Doctorate Chemistry-Physics, University Felix HOUPHOUET BOIGNY, 2013
Sinha, « Adsorptive removal of Bisphenol A by biomass activated carbon and insights into the adsorption mechanism through density functional theory calculations », Sustainable Chemistry and Pharmacy, vol. 13, p. 100159, sept. 2019, doi: 10.1016/j.scp.2019.100159
It allows to obtain activated carbons of good quality and developing important pore structures with large specific surfaces [5].
Bamba, «Elimination of diuron from waters by techniques using natural resources of the Ivory Coast: solar photocatalysis and activated carbon of coconut shells", These of Doctorate Chemistry-Physics, University of Cocody Abijan, 2009
Aboua Kouassi, «Optimisation par le plan Factoriel complet des conditions de production de charbon actif et utilisation pour l'élimination de colorant et métaux lourds en solutions aqueuses", These of Doctorate Chemistry-Physics, University Felix HOUPHOUET BOIGNY, 2013
Sinha, « Adsorptive removal of Bisphenol A by biomass activated carbon and insights into the adsorption mechanism through density functional theory calculations », Sustainable Chemistry and Pharmacy, vol. 13, p. 100159, sept. 2019, doi: 10.1016/j.scp.2019.100159
Online since: September 2013
Authors: Tao Xue, Bao Hong Zhang, Jia Guang Meng
The molecular structure of polyester is close, and its moisture regain is low.
Infrared spectrometry characterization The structure and chemical groups of PET fabric and PANI/PET composite conductive fabric were characterized with Nicolet Nexus670 infrared spectrometer. 3 Results and discussion a b c d e f Fig.1 SEM of fabric (a) Polyester fabric without pretreatment (b) Polyester fabric after alkali deweighting (c) Polyester fabric after low temperature plasma (d) PANI/PET fabric without pretreatment (e) PANI/PET fabric with alkali deweighting (f) PANI/PET fabric with alkali deweighting and low temperature plasma In figure 1-a, the surface of polyester fabric without pretreatment is smooth, and particles on the surface might be produced during the manufacture.
Chemistry of Materials, 2008, 20(8):2839-2844
Materials Chemistry and Physics, 2010, 120:46-53
Materials Chemistry and Physics, 2002, 73(1): 106-110
Infrared spectrometry characterization The structure and chemical groups of PET fabric and PANI/PET composite conductive fabric were characterized with Nicolet Nexus670 infrared spectrometer. 3 Results and discussion a b c d e f Fig.1 SEM of fabric (a) Polyester fabric without pretreatment (b) Polyester fabric after alkali deweighting (c) Polyester fabric after low temperature plasma (d) PANI/PET fabric without pretreatment (e) PANI/PET fabric with alkali deweighting (f) PANI/PET fabric with alkali deweighting and low temperature plasma In figure 1-a, the surface of polyester fabric without pretreatment is smooth, and particles on the surface might be produced during the manufacture.
Chemistry of Materials, 2008, 20(8):2839-2844
Materials Chemistry and Physics, 2010, 120:46-53
Materials Chemistry and Physics, 2002, 73(1): 106-110
Online since: October 2012
Authors: S. Vairam, V. Ranjithkumar
Vairamb
Department of Chemistry, Government College of Technology,
Coimbatore – 641013, Tamil Nadu, India
amscranjith@gmail.com, bvamshen@yahoo.com
Keywords: Activated carbon; Nanocomposites; Mn3O4; Saturation magnetization
Abstract: Activated carbon-Mn3O4 nanocomposites have been prepared by in situ decomposition of manganese (II) acetate and manganese (II) benzoate precursors, in a carbon matrix to Mn3O4.
Introduction Activated carbon has been known well as absorbents due to high surface area, porous structure and special reactivity in air and water pollution control for 60 years.
A common peak at 2θ = 6o is observed in AC and C1 and C2 showing that the carbon structure was not destroying during synthesis.
Huang, Journal of Solid State Chemistry, 183 (2010) 744-751 [8] C.
Yaogang, Journal of Solid State Chemistry, 179 (2006) 1208-1213 [9] C.
Introduction Activated carbon has been known well as absorbents due to high surface area, porous structure and special reactivity in air and water pollution control for 60 years.
A common peak at 2θ = 6o is observed in AC and C1 and C2 showing that the carbon structure was not destroying during synthesis.
Huang, Journal of Solid State Chemistry, 183 (2010) 744-751 [8] C.
Yaogang, Journal of Solid State Chemistry, 179 (2006) 1208-1213 [9] C.