@article { author = {Shahriari, A. and Aghajani, H. and Hosseini, M.Gh.}, title = {A study of oxidation behavior of AZ91D alloy with YSZ coating using EIS}, journal = {Progress in Color, Colorants and Coatings}, volume = {10}, number = {1}, pages = {1-12}, year = {2017}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2017.75709}, abstract = {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.}, keywords = {electrochemical impedance spectroscopy,Oxide film,AZ91D,YSZ}, url = {https://pccc.icrc.ac.ir/article_75709.html}, eprint = {https://pccc.icrc.ac.ir/article_75709_15cc35d4419855dbb3e88bdcedfe0637.pdf} } @article { author = {Mehrizad, A. and Gharbani, P.}, title = {Synthesis of ZnS decorated carbon fibers nanocomposite and its application in photocatalytic removal of Rhodamine 6G from aqueous solutions}, journal = {Progress in Color, Colorants and Coatings}, volume = {10}, number = {1}, pages = {13-21}, year = {2017}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2017.75710}, abstract = {.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.}, keywords = {Carbon nanofibers,photocatalyst,Rhodamine 6G,Zinc Sulfide}, url = {https://pccc.icrc.ac.ir/article_75710.html}, eprint = {https://pccc.icrc.ac.ir/article_75710_21c215366836f12d17f93ceef49715ef.pdf} } @article { author = {Mahmoodi, N.M. and Mokhtari-Shourijeh, Z.}, title = {Preparation of polyacrylonitrile – titania electrospun nanofiber and its photocatalytic dye degradation ability}, journal = {Progress in Color, Colorants and Coatings}, volume = {10}, number = {1}, pages = {23-30}, year = {2017}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2017.75711}, abstract = {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.}, keywords = {Preparation,Characterization,Electrospinning,Polyacrylonitrile–titania nanofiber,photocatalytic dye degradation}, url = {https://pccc.icrc.ac.ir/article_75711.html}, eprint = {https://pccc.icrc.ac.ir/article_75711_ba476b9d88c69639ada52264ea11392d.pdf} } @article { author = {Ghadami, A. and Ehsani, M. and Haddadi, H. and Kaffashi, B.}, title = {Effect of Micro Glass Flake on Morphological and Rheological Behaviour of Epoxy Vinyl Ester Composite Coatings}, journal = {Progress in Color, Colorants and Coatings}, volume = {10}, number = {1}, pages = {31-41}, year = {2017}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2017.75712}, abstract = {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.}, keywords = {glass flake,Epoxy Vinyl Ester,morphology,Rheology,Aspect ratio,Sonication}, url = {https://pccc.icrc.ac.ir/article_75712.html}, eprint = {https://pccc.icrc.ac.ir/article_75712_d03b33e812e264db7cf8025303d79e0a.pdf} } @article { author = {Hosseinnezhad, M. and Moradian, S. and Gharanjig, K.}, title = {Synthesis and Characterization of Indoline-based organic sensitizers for photoelectrochemical cells}, journal = {Progress in Color, Colorants and Coatings}, volume = {10}, number = {1}, pages = {43-50}, year = {2017}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2017.75713}, abstract = {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.}, keywords = {Indoline,Dye,sensitized solar cells,Organic dyes,optical materials,Conversion efficiencies}, url = {https://pccc.icrc.ac.ir/article_75713.html}, eprint = {https://pccc.icrc.ac.ir/article_75713_a1dca39b92e492e336e3c5de0d07dd64.pdf} } @article { author = {Rostami, M. and Khosravi, A. and Attar, M. M.}, title = {Synthesis and Surface Modification of Pigment Red 3 by Sulfonation Method for Improving Properties in Waterborne Ink}, journal = {Progress in Color, Colorants and Coatings}, volume = {10}, number = {1}, pages = {51-65}, year = {2017}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2017.75714}, abstract = {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.}, keywords = {Pigment Red 3,surface treatment,Sulfonation,Water born flexographic inks}, url = {https://pccc.icrc.ac.ir/article_75714.html}, eprint = {https://pccc.icrc.ac.ir/article_75714_e5db5d2741e2eadde9b9caf2cbcea4ac.pdf} }