Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
10
1
2017
02
01
A study of oxidation behavior of AZ91D alloy with YSZ coating using EIS
1
12
EN
A.
Shahriari
Department of Materials Engineering,Faculty of Mechanical Engineering, University of Tabriz
aydashahriari@tabrizu.ac.ir
H.
Aghajani
Department of Materials Engineering,Faculty of Mechanical Engineering, University of Tabriz
h_aghajani@tabrizu.ac.ir
M.Gh.
Hosseini
Department of Physical Chemistry,Electrochemistry Research Laboratorymistry, Tabriz university
mg-hosseini@tabrizu.ac.ir
10.30509/pccc.2017.75709
Oxidation behavior of AZ91D magnesium alloy with 3YSZ coating and aluminum interlayer was studied in air at 250 °C using electrochemical impedance spectroscopy EIS, scanning electron microscopy SEM, and X-ray diffraction XRD. The oxidation process was carried out in various duration times from 1 to 10 h. A three-electrode electrochemical cell was employed for all the EIS measurements. Also, to focus on the characteristics of the oxide films, a nonaggressive electrolyte 0.1 M Na2SO4 was used. The EIS data were interpreted with a two-layered model, and the obtained capacitance and resistance are related to the thickness and defectiveness of YSZ coating and oxide film which was formed during the oxidation process. The results showed that after 6 h of oxidation time, the defects are produced in YSZ coating and it helps to increase the thickness of the oxide film. Also, XRD results revealed that the oxide films were mainly composed of Al2O3 and MgAl2O4 phases. The oxide film remained protective during extra oxidation period. In addition, the electrochemical model was supported by SEM observations.
electrochemical impedance spectroscopy,Oxide film,AZ91D,YSZ
https://pccc.icrc.ac.ir/article_75709.html
https://pccc.icrc.ac.ir/article_75709_15cc35d4419855dbb3e88bdcedfe0637.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
10
1
2017
02
01
Synthesis of ZnS decorated carbon fibers nanocomposite and its application in photocatalytic removal of Rhodamine 6G from aqueous solutions
13
21
EN
A.
Mehrizad
Department of Chemistry, Tabriz Branch, Islamic Azad University
ali.mehrizad@yahoo.com
P.
Gharbani
Department of Chemistry, Ahar Branch, Islamic Azad University
parvingharbani@yahoo.com
10.30509/pccc.2017.75710
.Zinc sulfide/carbon nanofibers ZnS/CNFs composite was successfully synthesized through a facile and simple method. The X-ray diffraction XRD patterns revealed the formation of ZnS decorated CNFs composite. The photocatalytic activity of ZnS/CNFs composite was investigated by the photodegradation of Rhodamine 6G Rh-6G dye in aqueous solutions. The effect of operational parameters such as initial Rh-6G concentration, ZnS/CNFs composite amount, pH and irradiation time were analyzed and optimized by response surface methodology RSM in photocatalysis process. The results revealed that the removal percentage of Rh-6G increased with increasing of ZnS/CNFs composite amount, pH and irradiation time, whereas higher initial dye concentration was unfavorable. The findings also showed that under optimum conditions initial Rh-6G concentration 6 mg L-1, ZnS/CNFs composite amount 1.25 g L-1, pH 8 and irradiation time 48 min and exposure of UV-C light irradiation 20 W m-2, the ZnS/CNFs composite exhibited a remarkable photodegradation of Rh-6G dye in aqueous media 99.17.
Carbon nanofibers,photocatalyst,Rhodamine 6G,Zinc Sulfide
https://pccc.icrc.ac.ir/article_75710.html
https://pccc.icrc.ac.ir/article_75710_21c215366836f12d17f93ceef49715ef.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
10
1
2017
02
01
Preparation of polyacrylonitrile – titania electrospun nanofiber and its photocatalytic dye degradation ability
23
30
EN
N.M.
Mahmoodi
Department of Environmental Research, Institute for Color Science and Technology
mahmoodi@icrc.ac.ir
Z.
Mokhtari-Shourijeh
Department of Environmental Research, Institute for Color Science and Technology
zahramokhtari12885@yahoo.com
10.30509/pccc.2017.75711
In this paper, polyacrylonitrile PAN - titania TiO2 electrospun nanofiber PAN/TiO2 nanofiber was prepared via a facile electrospinning method. The characteristics of the PAN/TiO2 nanofiber were investigated using SEM and FTIR. The nanofiber showed retained nanofiber structures and high photocatalytic efficiency under UV light for the degradation of Direct Red 80 DR80 and Direct Red 23 DR23 in water. The photocatalytic dye degradation kinetics followed first-order model. The reaction rate constant k at 20 mg/L dye concentration was 0.0184 min-1 for DR 80 and 0.0328 min-1 for DR23. The dye degradation rate constant decreased by increasing initial dye concentration. The results indicated that polyacrylonitrile - titania electrospun nanofiber could be used as a photocatalyst to decolorize colored wastewater.
Preparation,Characterization,Electrospinning,Polyacrylonitrile–titania nanofiber,photocatalytic dye degradation
https://pccc.icrc.ac.ir/article_75711.html
https://pccc.icrc.ac.ir/article_75711_ba476b9d88c69639ada52264ea11392d.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
10
1
2017
02
01
Effect of Micro Glass Flake on Morphological and Rheological Behaviour of Epoxy Vinyl Ester Composite Coatings
31
41
EN
A.
Ghadami
Department of Chemical Engineering,Faculty of Engineering, Central Tehran Branch,Islamic Azad University
a.ghadami@ippi.ac.ir
M.
Ehsani
Department of Polymer processing, Iran Polymer and Petrochemical Institute
m.ehsani@ippi.ac.ir
H.
Haddadi
School of Engineering,Department of Polymer, College of Chemical Engineering, University of Tehran
a.ghadami1394@gmail.com
B.
Kaffashi
School of Engineering,Department of Polymer, College of Chemical Engineering, University of Tehran
kaffashi@ut.ac.ir
10.30509/pccc.2017.75712
In the present work, attempts were made to investigate the reinforcement and treatment effect of GF on morphological and rheological behaviour of GF/epoxy vinyl ester composites. GF was incorporated into epoxy vinyl ester resin by sonication, and mechanical agitation. Rheological and morphological properties were studied as a function of particle treatment and size distributions. The dispersion morphology, agglomeration degree and homogeneity of additives were analyzed by scanning electron microscopy SEM, and optical microscopy. Effect of mixing method, surface treatment, and particle size distribution on rheological properties of composites were investigated with a modular compact rheometer. The results showed that the mechanical agitation decreases GF aspect ratio more than sonication. SEM fractography shows finer particles improve toughness properties of the composites in comparison with larger ones. GF with larger circular diameter and length is more sensitive to shear than the smaller one. Rheological investigations showed that surface treatment improves the interaction between the polymer matrix and GF. These results indicated that the finer the GF, the better the rheological properties will be displayed.
glass flake,Epoxy Vinyl Ester,morphology,Rheology,Aspect ratio,Sonication
https://pccc.icrc.ac.ir/article_75712.html
https://pccc.icrc.ac.ir/article_75712_d03b33e812e264db7cf8025303d79e0a.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
10
1
2017
02
01
Synthesis and Characterization of Indoline-based organic sensitizers for photoelectrochemical cells
43
50
EN
M.
Hosseinnezhad
0000-0003-3351-0157
Center of Excellence for Color Science and Technology,Department of Organic Colorants, Institute for Color Science and Technology
hosseinnezhad-mo@icrc.ac.ir
S.
Moradian
Faculty of Polymer and Color Engineering,Amirkabir University of Technology, Center of Excellence for Color Science and Technology,Institute for Color Science and Technology
moradian@aut.ac.ir
K.
Gharanjig
0000-0002-0115-3557
Center of Excellence for Color Science and Technology,Department of Organic Colorants, Institute for Color Science and Technology
gharanjig@icrc.ac.ir
10.30509/pccc.2017.75713
In this paper we designed and prepared three free-metal organic days Dye 1, Dye 2 and Dye 3 based on indoline with n-phenly substituents iminodibenzyl as the electron donor group. We used cyanoacrylic acid substituent as the electron acceptor anchoring group in organic dyes. The proposed dyes were prepared from iminodibenzyl as the starting material by standard reactions and characterized by different techniques such as melting point, FT-IR, 1HNMR, elemental analysis and UV-Visible spectroscopy after purification. Spectrophotometric measurements of the organic dyes in solution and on a photoanode substrate were carried out in order to assess changes in the status of the dyes. The wavelength of maximum absorption for Dye 1 to Dye 3 in solution are 416 nm, 421 nm and 409 nm and on photoanode substrate are 437 nm, 440 nm and 421 nm, respectively. Finally, the proposed dyes used as sensitizer in a photoelectrochemical cell structure and their photovoltaic properties investigated. The Conversion efficiency for Dye 1 to Dye 3 are 2.84 and 3.11 and 2.12, respectively.
Indoline,Dye,sensitized solar cells,Organic dyes,optical materials,Conversion efficiencies
https://pccc.icrc.ac.ir/article_75713.html
https://pccc.icrc.ac.ir/article_75713_a1dca39b92e492e336e3c5de0d07dd64.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
10
1
2017
02
01
Synthesis and Surface Modification of Pigment Red 3 by Sulfonation Method for Improving Properties in Waterborne Ink
51
65
EN
M.
Rostami
0000-0002-1024-221X
Department of Nano Materials and Coatings, Institute for color science and technology
rostami-m@icrc.ac.ir
A.
Khosravi
Department of Polymer Engineering and Color Technology , Amirkabir University of Technology
a.khosravi@aut.ac.ir
M. M.
Attar
Department of Polymer Engineering and Color Technology , Amirkabir University of Technology
attar@aut.ac.ir
10.30509/pccc.2017.75714
Pigment Red3 was synthesized and chemically treated by sulphonation. The treatment, affected the surface chemistry and the shape of pigments. The effects of reaction time, temperature, Solvent/Pigment ratio and Acid/Pigment ratio were examined on the treated pigment. The investigation of experimental design based on Tauguchi method, was carried out. To assessment of treated particles, UV-visible spectroscopy, Densitometry, Turbidiometry, pH and Scanning Electron Microscope were studied. Also to study the effects of surface modification on final properties of water born flexographic ink, tests such as rate of dispersion, gloss, K/S, Chroma, hue and lightness of ink coating was performed. To characterize the properties of the treated pigment, With regards to the results of properties of analysis and Variance Analysis, optimum samples were selected. The effect of each independent parameter was considered.
Pigment Red 3,surface treatment,Sulfonation,Water born flexographic inks
https://pccc.icrc.ac.ir/article_75714.html
https://pccc.icrc.ac.ir/article_75714_e5db5d2741e2eadde9b9caf2cbcea4ac.pdf