Crystal Phase Study of Pigment Red 254 in the Presence of Ionic Liquids
S. S.
Shamekhi
Department of Organic Colorants, Institute for Color Science and Technology
author
F.
Nourmohammadian
Department of Organic Colorants, Institute of Color Science and Technology
author
text
article
2012
eng
Different crystal phase with a same chemical structure, polymorphous, is a specific physical characteristic which determine the end usage of pigments especially in high performance ones. Diketopyrrolopyrrole DPP derivatives, as one of the innovative in heterocyclic pigments, follow this pattern. Synthesis of pigment red 254 in selected crystal phase using ionic liquids was achieved without any further phase separation steps after synthesis. Observed different physical properties such as melting points, color properties of these synthesized pigmentsPR 254 in α and β phases are clarified .
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
5
v.
1
no.
2012
1
6
https://pccc.icrc.ac.ir/article_75792_ecbe45b74ccbc7be221cc92c45652c88.pdf
dx.doi.org/10.30509/pccc.2012.75792
Synthesis and characterization of red pearlescent pigments based on muscovite and zirconia-nanoencapsulated hematite
M.
Hosseini zori
Department of Inorganic Pigment and Glazes, Institute for Color Science and Technology
author
text
article
2012
eng
Applications of mica-based pearlescent pigments are related to plastics, cosmetics, automobiles coatings among others, but they seem to be not explored by the ceramic industry. In this work, intensively red and gold colored muscovite pigments covered with layer of nanoparticles containing iron and zirconium oxides were prepared by homogeneous precipitation. The final color was obtained after thermal annealing. The pigments were characterized by X-ray diffraction, scanning electron microscopy and X-ray fluorescence as well as measuring colorimetric parameters of the obtained ceramic materials. Results indicated that nanoparticles are formed on muscovite flakes and the red factor increases with iron content.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
5
v.
1
no.
2012
7
13
https://pccc.icrc.ac.ir/article_75790_41dbb492278721b9c6c11050492268a3.pdf
dx.doi.org/10.30509/pccc.2012.75790
Investigation into the effect of UV/Ozone Irradiation on the dyeing behaviour of Poly(lactic acid) and Poly(ethylene terephthalate) Substrates
F.
Fattahi
Department of Textile Engineering, Isfahan University of Technology
author
H.
Izadan
Department of Textile Engineering, Isfahan University of Technology
author
A.
Khodami
Department of Textile Engineering, Isfahan University of Technology
author
text
article
2012
eng
The effect of UV/Ozone irradiation together with the pretreatments using distilled water, hydrogen peroxide, and hydrogen peroxide/sodium silicate solutions on the dyeing depth of the poly(lactic acid), PLA, and poly(ethylene terephthalate), PET, fabrics by the application of disperse dyes were investigated and the results were compared with that of untreated fabrics. The results showed that the reflectance and the L* of the treated fabrics decreased and these reductions maximized by the pretreatment of the fabrics with the hydrogen peroxide/sodium silicate solution. The SEM images of the fabrics showed a change in the surface morphology of the treated fabrics which is attributed to the intensified etching effect of the UV/Ozone irradiation.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
5
v.
1
no.
2012
15
22
https://pccc.icrc.ac.ir/article_75789_5a9ef0f121733e66b11e16221ea491f9.pdf
dx.doi.org/10.30509/pccc.2012.75789
Synthesis and characterization of some novel linear azo-azomethine compounds based on 1-bromo, 4-4-4-nitrophenylazo phenoxy butane
A.
Mohammadi
Department of Chemistry,Faculty of Sciences, University of Guilan
author
M.R.
Yazdanbakhsh
Department of Chemistry, Faculty of Sciences, University of Guilan, Rasht, Iran,
author
N.
Mahmoodi
Department of Chemistry, University of Guilan
author
text
article
2012
eng
The reaction of some carbocyclic and heterocyclic Schiff bases with the synthesized 1-bromo, 4-[4-(4-nitrophenylazo) phenoxy] butane and formation of novel linear azo-azomethine compounds in good to excellent yields were investigated. The compounds were fully characterized by UV-Vis, FT-IR, 1H NMR spectroscopic techniques and elemental analysis. Effects of various solvents on their visible absorption spectra at a concentration of 10-5-10-6 M were estimated. The color of the dyes is discussed with respect to the substituent therein. Introduction of an electron-withdrawing group into the para-position of azomethines produces bathochromic shift of the absorption peak in all solvents. The key features of these reactions are, in turn, their operational simplicity, mild reaction conditions and easily-accessed starting materials.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
5
v.
1
no.
2012
23
33
https://pccc.icrc.ac.ir/article_75793_6bb61a2cc1da4e46915515e573990a0c.pdf
dx.doi.org/10.30509/pccc.2012.75793
Application of synthesized nanoscale zero-valent iron in the treatment of dye solution containing Basic Yellow 28
T.
Poursaberi
, Department of Instrumental Analysis, Research Institute of Petroleum Industry
author
M.
Hassanisadi
, Department of Instrumental analysis, Research Institute of Petroleum Industry
author
F.
Nourmohammadian
Department of Organic Colorants, Institute of Color Science and Technology
author
text
article
2012
eng
Nanoscale zero-valent iron NZVI particles were synthesized by the aqueous phase borohydride reduction method, and the synthesized NZVI particles were used for the degradation of Basic Yellow 28 BY28 dye in aqueous solution. The influence of experimental variables such as reaction time, NZVI particle dosage and pH were studied on the decolorization of BY28. Mixing an aqueous solution of 100 mg L−1 BY28 with 2 g L-1 Fe0 resulted in 98.2 loss of BY28 within 15 min. The color removal efficiency was found to be increased with decrease in initial pH of dye solution and NZVI exhibited good color removal efficiency at acidic pH. Solvent extraction of the Fe0 revealed that BY28 removal was not through adsorption and as Fe0 treatment of BY28 lead to new chromatographic peaks degradation products in HPLC analysis, removal occurred through degradation.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
5
v.
1
no.
2012
35
40
https://pccc.icrc.ac.ir/article_75791_cdb546a443a19bf83baee70222d7693a.pdf
dx.doi.org/10.30509/pccc.2012.75791
Decomposition of a Di Azo Dye in aqueous solutions by
M. E.
Olya
Department of Environmental Research, Institute for Color Science and Technology
author
A.
Aleboyeh
Group de Génie des Procédés de Traitement des Effluents, Université de Haute Alsace
author
H.
Aleboyeh
Group de Génie des Procédés de Traitement des Effluents, Université de Haute Alsace
author
text
article
2012
eng
This study examined the photolytic degradation of C.I. Acid Red 73 AR73 diazo dye, in aqueous solution by combined UV, hydrogen peroxide and KMnO4. A continuous circulated photoreactor equipped with a low pressure mercury lamp 15 W, emission 253.7 nm was used. In the first step, potassium permanganate was used for decolourisation of AR73 dye solution. The effect of the key operating variables such as initial dye concentration, permanganate amount, pH and temperature were studied. In order to avoid the overdose of KMnO4, the stoichiometric amount of permanganate required for 1 mol of AR73 complete colour removal was determined 2.79 mol. Dye degradation efficiency was studied by monitoring Total Organic Carbon TOC at different UV irradiation times. In the acidic solution, 100 of AR73 colour removal and near 10 dye mineralization have been observed in no more than 5 minutes. In the second step, after decolourisation period, UV/H2O2 system was applied for mineralization of the dye solution. In the best operational conditions, after 180 minutes of UV irradiation time, we have observed 90 of dye mineralization. In the third step, the results of this method were compared with which obtained by using UV/H2O2 system without KMnO4 oxidative pre-treatment. It was found that under the same irradiation time 180 min, KMnO4/UV/H2O2 process is about 10 more effective for mineralization of AR73 dye solution.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
5
v.
1
no.
2012
41
46
https://pccc.icrc.ac.ir/article_75788_5a728c1b39ae4653c5f7fa0d34f2f12c.pdf
dx.doi.org/10.30509/pccc.2012.75788
Preparation of Nanohydroxyapatite-Carbon Nanotube Composite Coatings on 316L Stainless Steel Using Electrophoretic Deposition
M.
Nabipour
Islamic Azad University, Sciences and Research Branch, Hesarak, P.O. Box: 14778938552, Tehran, Iran.
author
S.
Rasouli
Department of Nanomaterials and Nanocoatings, Institute for Color Science and Technology, P.O. Box: 16765-654, Tehran, Iran.
author
A. R.
Gardeshzadeh
Department of Nanomaterials and Nanocoatings, Institute for Color Science and Technology, P.O. Box: 16765-654, Tehran, Iran.
author
text
article
2011
eng
Nanohydroxyapatite-carbon nanotube composite coatings were deposited via electrophoretic deposition (EPD). AISI 316L stainless steel and ethanol were used as substrate and dispersing medium, respectively. 5%wt carbon nanotube (CNT) was used as reinforcing phase. Uniform and macrocrack-free coatings were obtained both for hydroxyapatite (HA) and HA-5%wt CNT coatings. Scanning electron microscopy (SEM) revealed that most of microcracks in HA coating has eliminated after introducing CNT as reinforcing phase. The variation of deposit weight by time and voltage was measured both for HA and HA-5%wt CNT coatings. Thickness measurements revealed that for both coatings, the thickness increases with deposition voltage. X-ray diffraction patterns indicated that HA has not decomposed after sintering at 850 ˚C for 2 hr in argon atmosphere. Prog. Color Colorants Coat. 5(2012), 47-53. © Institute for Color Science and Technology.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
5
v.
1
no.
2011
47
53
https://pccc.icrc.ac.ir/article_77113_4038eee9d838bc3018d336c30780447c.pdf
dx.doi.org/10.30509/pccc.2011.77113