Institute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-213410420171101Electrochemical Evaluation of Polyvinyl Butyral Coating Containing Polypyrrole/ZnO Nanocomposite for Corrosion protection of Al Alloy2052167572710.30509/pccc.2017.75727ENG.S.SajadiDepartment ofChemistry, Shahid Bahonar University of KermanS.M.A.HosseiniDepartment of Chemistry, Shahid Bahonar University of KermanM.J.BahramiDepartment of Science, Farhangian UniversityM.ShahidiDepartment of Chemistry, Islamic Azad University, Kerman Branch0000-0003-1334-4040Journal Article19700101In this work, polypyrrole/ZnO nanocomposite (PPy/ZnO NC) was produced through synthesis of polypyrrole polymer in the presence of ZnO nanoparticles. The corrosion behavior of polyvinyl butyral coatings without and with different weight percentages of nanocomposite on the surface of 7075 Al alloy was investigated in 3.5% NaCl solution at different immersion times using electrochemical impedance spectroscopy (EIS) and electrochemical noise (EN) techniques. The coating with 0.025% PPy/ZnO NC revealed the highest corrosion resistance. In order to analysis of EN data, wavelet transform was used to obtain the standard deviation of partial signal (SDPS) plots. The good agreement between the EIS and EN results indicates that the EN technique, as well as the EIS method, can be used successfully for the corrosion evaluation of coatings.Institute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-213410420171101Synthesis of Some New Disperse Dyes-multi Walled Carbon Nanotubes Adducts and Impact Analysis of Substituents2172247572810.30509/pccc.2017.75728ENR.AmiriDepartment of Chemistry, Central Tehran Branch, Islamic Azad UniversityF.Afshar TaromiFaculty of Polymer and Color Engineering, Amirkabir University of TechnologyH.CheghiniDepartment of Chemistry, Central Tehran Branch, Islamic Azad UniversityY.TishbiDepartment of Chemistry, Central Tehran Branch, Islamic Azad UniversityN.RezaeeDepartment of Chemistry, Central Tehran Branch, Islamic Azad UniversityJournal Article19700101We have reported here a simple, low cost preparation of four new adducts from some anthraquinone disperse dyes with functionalized multi-walled carbon nanotubes in the presence of azochromophore. The structural differences between the final products are evaluated by visual dispersion test, UV-Vis Spectroscopy, Fourier transforms infrared, Raman, nuclear magnetic resonance and thermal gravimetric analysis. The morphology of themis detected using scanning electron microscopy. It has been shown that various substituents on the backbone of anthraquinone can affect the features of the adducts.Institute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-213410420171101Dielectric Strontium Zirconate Sprayed by a Plasma Torch2252307572910.30509/pccc.2017.75729ENP.CtiborASCR, Za Slovankou 3, Institute of Plasma PhysicsJ.SedlacekDepartment of Elecrotechnology, Faculty of Electrical Engineering Czech, Czech Technical universityM.JanataChief of the LPT dislocated laboratory, Institute of Plasma Physics, ASCR, Za Slovankou 3Journal Article19700101Amultifunctional material, strontium zirconate, SrZrO3, studied in literatures as a dielectric ceramics, thermal barrier coating, proton-conductor, and luminescent material was sprayed by a water-stabilized plasma torch WSP 500. Stainless steel and plain carbon steel were used as substrates. Coatings with thickness of 1 to 2 mm were produced, whereas the substrates were preheated over 450 °C. The torch working at 150 kW was able to spray SrZrO3 with a spray rate of 10 kg per hour. Microstructure, phase composition, dielectric properties, and optical band gap were also investigated.Institute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-213410420171101Synthesis and Characterization of CoAl2O4 Nano Pigments by Polyol Method2312387573010.30509/pccc.2017.75730ENM.Khajeh AminianDepartment of Physics, Yazd University0000-0003-2396-8092T.AziziDepartment of Physics, Yazd UniversityR.DehghanDepartment of Physics, Yazd UniversityM.HakimiDepartment of Physics, Yazd UniversityJournal Article19700101Blue nano pigments of CoAl2O4 were successfully prepared by polyol method. Two different groups of materials containing chloride and acetate compounds were used to synthesis the nano pigments. The nano pigments were calcinated at 1100 °C. The CoAl2O4 nano pigments were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS), dynamic light scattering (DLS), UV–Vis spectroscopy and CIE-L*a*b* colorimetric measurement. Dynamic light scattering analysis confirmed the formation of nanoparticles in the suspensions. XRD data of CoAl2O4 powders shows the acetate compounds resulted in a mono-phase CoAl2O4 spinel structure, while the chloride compounds resulted in two phases of CoAl2O4 and Al2O3 crystal structures. The SEM images showed that the average size of nano CoAl2O4 pigments is about 50 nm for all nano pigments while they have some agglomerations. The formation of blue pigments in all samples was confirmed by means of colorimetric parameters and DRS spectra. The purity and intensity of color for the samples were different.Institute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-213410420171101Investigation of Indigo/thioindigo Tandem Dye-Sensitized Solar Cells2392447573110.30509/pccc.2017.75731ENM.HosseinnezhadCenter of Excellence for Color Science and Technology,Department of Organic Colorants, Institute for Color Science and Technology0000-0003-3351-0157S.MoradianFaculty of Polymer and Color Engineering,Amirkabir University of Technology, Center of Excellence for Color Science and Technology,Institute for Color Science and TechnologyK.GharanjigCenter of Excellence for Color Science and Technology,Department of Organic Colorants, Institute for Color Science and Technology0000-0002-0115-3557Journal Article19700101In this paper we used two free-metal organic dyes (dye 1 and dye 2) based on indigo and thioindigo with cyanoacrylic acid as the electron acceptor group. The proposed dyes were sensitized from naphalene as the starting material by standard reactions and characterized by different analytical techniques and UV-Visible spectroscopy after purification. Spectrophotometric measurements of the organic dyes in solution and on a TiO2 substrate were carried out in order to assess changes in the status of the dyes. The wavelengths of maximum absorption for dye 1 and dye 2 in solution were 572 nm and 492.3 nm and on TiO2 films were 595 nm and 516.8 nm, respectively. Finally, the proposed dyes were used as sensitizer in DSSCs and T-DSSCs structure and their photovoltaic properties were investigated. The Conversion efficiency for dye 1 and dye 2 in DSSCs and T-DSSCs were 3.45% and 6.45% and 4.09%, respectively.Institute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-213410420171101Epoxy-based Flame Retardant Nanocomposite Coatings: Comparison Between Functions of Expandable Graphite and Halloysite Nanotubes2452527573210.30509/pccc.2017.75732ENM.R.SaebDepartments of Resin and Additives, Institute for Color Science and TechnologyH.VahabiLaboratoire MOPS E.A, Université de LorraineM.JouyandehLaboratoire MOPS E.A, Université de LorraineE.MovahedifarDepartment of Polymer Engineering, Amirkabir University of Technology–Mahshahr CampusR.KhaliliKish International Campus, University of TehranJournal Article19700101Whis work presents a study on the flammability of epoxy coatings containing two types of nano-scale fillers as potential flame retardants: expandable graphite (EG) and halloysite nanotubes (HNTs). Both nanocomposites are prepared by incorporation of the same amount of nanofiller into the epoxy resin for the sake of comparison. Fire retardant nanocomposite coatings are cured through a two-stage procedure in a mold and oven, respectively. The cone calorimeter test is performed to investigate the effect of using these flame retardants on the peak of Heat Release Rate (pHRR), Total Heat Release (THR), Total Smoke Production (TSP) and Time-To-Ignition (TTI). It was found that the thermal behavior of blank epoxy and epoxy/EG was quite different and loading EG leaded to a significant fall in pHRR. In the presence of EG, the thin layer of residue was formed at first stages of ignition, grown rapidly and became denser acting as a strong barrier against fire. This barrier could retard the burning and doubled the total time of burning. By contrast, HNTs could not affect as an efficient flame retardant in the epoxy-based coating. Even by high loading level of 9 wt.%, HNT could not influence pHRR, TTI and THR parameters.