Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
2
2015
05
01
Exploring and exploiting plants extracts as the natural dyes/antimicrobials in textiles processing
87
114
EN
M.
Bagherzadeh Kasiri
Faculty of Applied Arts, Tabriz Islamic Art Univeristy
m.kasiri@tabriziat.ac.ir
S.
Safapour
0000-0001-8589-8670
Faculty of Carpet, Tabriz Islamic Art University
s.safapour@gmail.com
10.30509/pccc.2015.75856
The large number of publications in the field of extraction, purification, modification, and process optimization of natural dyes and their application on textiles demonstrates the revival of natural dyes on textile coloration. The use of natural dyes is growing in popularity because of the quality of the natural dyestuff obtained, the environmental compatibility of the dyes and the substantial minimization of processing costs. Natural dyes are extracted from different parts of the plants such as bark, leaf, root, fruit, seed, and flower that contain coloring materials like tannin, flavonoids, quinonoids, etc. In this paper, it has been tried to give the latest scientific overview on extraction and application of natural colorants on textiles processing. The benefits and limitations of application on textiles along with the different methods of extraction of natural colorants have been discussed. Moreover, the examples of early applications of natural dyes on textile processing have been reviewed.
Dye extraction,Dye fastness,Green treatment,Natural antimicrobial,Natural Dye,Textile processing
https://pccc.icrc.ac.ir/article_75856.html
https://pccc.icrc.ac.ir/article_75856_3e84e0855dc7e69c12b71ebf5d78bb58.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
2
2015
05
01
Fabrication of black printing toner through in situ polymerization: An effective way to increase conversion
115
121
EN
F.
Andami
Department of Printing Science and Technology, Institute for Color Science and Technology
fatemeh_andami@yahoo.com
M.
Ataeefard
Department of Printing Science and Technology, Institute for Color Science and Technology
ataeefard-m@icrc.ac.ir
F.
Najafi
Departments of Resin and Additives, Institute for Color Science and Technology
fnajafi@icrc.ac.ir
M.R.
Saeb
Departments of Resin and Additives, Institute for Color Science and Technology
saeb-mr@icrc.ac.ir
10.30509/pccc.2015.75850
Styrene-acrylate copolymer was synthesized in presence of carbon black through heterogeneous polymerization. The percentage of monomer conversion was measured by gravimetric method, also PSA, SEM, DSC and GPC were used for studying the particle size and particle size distribution, morphology, thermal properties and molecular weight, respectively. As well as color properties were characterized by spectrophotometry method. The results showed that the copolymer was appropriate for applying as printing toner. In this study to improve the monomer conversion, a redox initiator system was applied, so the conversion increased from 20 to 75. Other properties such as particle size, particle size distribution, morphology, thermal behavior, molecular weight and color properties were affected by this change but they were in the acceptable range.
https://pccc.icrc.ac.ir/article_75850.html
https://pccc.icrc.ac.ir/article_75850_26cfaea8ca7f4bb5c4fea70e12b947c0.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
2
2015
05
01
Decoloration of Disperse blue 56 by Using of UV/H2O2/MWCNT’s
123
133
EN
M.
Khajeh mehrizi
Department of Textile Engineering, Yazd University
mkhajeh@yazd.ac.ir
A.
Mahmudi
Department of Textile Engineering, Yazd University
abolfazlmahmudi@yahoo.com
10.30509/pccc.2015.75851
In this study, the oxidation of dye from colored wastewater by H2O2/ MWCNT’s multi walls carbon nano tubes solution assisted with UV radiation was investigated. Disperse Blue 56 DB 56 was used as a model dye. Adsorption behavior of DB56 from aqueous solution onto MWCNT’s was investigated under various conditions such as initial pH value, dye concentration, H2O2 and MWCNT’s dosage. Maximum adsorption capacity for DB 56, at pH 7.0, 5.0 and 3.0 was found to be 0.53, 0.56 and 0.97 mmol/g, respectively. Obtained result of isotherm displayed that the linear correlation coefficients and standard deviations of Nernest and Freundlich isotherms were specified and the results revealed that Freundlich isotherm fitted the experimental results better than Nernest. The adsorption kinetics was more precisely denoted by a pseudo second-order model revealed by regression grades. Furthermore, results displayed that the UV/H2O2/MWCNTs process could be used as eco-friendly method to degrade dyes from colored wastewater.
Decoloration,Disperse dye,UV Radiation,H2O2/MWCNT’s,Isotherm
https://pccc.icrc.ac.ir/article_75851.html
https://pccc.icrc.ac.ir/article_75851_6aec5f7a0eae3df4adf1784a2018ebe7.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
2
2015
05
01
Spectral Reconstruction of Blacks and Whites by Using the Statistical Colorants
135
144
EN
R.
Jafari
Department of Color Physics, Institute for Color Science and Technology
jafari-ra@icrc.ac.ir
S. H.
Amirshahi
0000-0001-8634-5218
Department of Textile Engineering, Amirkabir University of Technology
hamirsha@aut.ac.ir
10.30509/pccc.2015.75852
In this paper, the spectral dimensions of two sets of samples including 457 black and 84 white fabrics are compared. White fabrics are treated with variety of fluorescent whitening agents and the blacks are fabrics that dyed with different combinations of suitable dyes and pigments. In this way, the reflectance spectra of blacks as well as the total radiance factors of whites are compressed in one to five compressed spaces using the principal component analyzing technique. The reduced data are then reconstructed and the averages of the percentile relative root mean square errors between the actual and the recovered spectra of each dataset are calculated to show the spectral dimensionality of both groups through the analyzing of spectral errors. Besides, the colorimetric errors between the actual and the compressed-reconstructed spectra are represented by the mean values of ΔE00 color difference values under D65 illuminant and 1964 standard observer. Results show that the total radiance factors of white samples are smoother than the reflectance spectra of blacks and could be adequately described in a 2 dimensional space, while blacks need to be characterized in higher dimensions i.e., 4, to approximately provide same cumulative energy content as well as spectral and colorimetric errors.
Spectral dimensions,Blacks,whites,Principal component analyzing technique,Statistical colorants
https://pccc.icrc.ac.ir/article_75852.html
https://pccc.icrc.ac.ir/article_75852_7bb8e5ed48e61abcf802cabbe5787eab.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
2
2015
05
01
Aryl azo 5-arylidene-2,4-thiazolidinone dyes as novel antioxidant and antibacterial compounds
145
152
EN
A.
Mohammadi
Department of Chemistry,Faculty of Sciences, University of Guilan
a_mohammadi@guilan.ac.ir
H.
Ghafoori
Department of Chemistry, University of Guilan
h.ghafoori@guilan.ac.ir
M.
Rassa
Department of Biology, University of Guilan
rassa9@yahoo.com
M.
Safarnejad
Department of Chemistry, University of Guilan
10.30509/pccc.2015.75853
In the present study, nine bis-azo dyes based on 5-arylidene-2,4-thiazolidinone were obtained in two steps, using Knoevenagel condensation and azo coupling reactions. The structure of the dyes was confirmed on the basis of spectral data. Analysis of spectroscopic data shows that there is equilibrium between the azo and hydrazone tautomers for all dyes in solutions. Investigation of antioxidant activity of compounds was carried out by 2,2-dipheny l-1-picrylhydrazyl DPPH and ferric reducing antioxidant power FRAP methods. The antibacterial activity towards three Gram negative and two Gram positive bacteria was also investigated. The activity data show that the synthesized dyes 3a-i have promising antibacterial activity, comparable with their precursor 1.
Azo dye,2,4,thiazolidinone,Tautomerism,Antioxidant activity,Antibacterial Activity
https://pccc.icrc.ac.ir/article_75853.html
https://pccc.icrc.ac.ir/article_75853_21efaed03e360ff26289b59b21e12abd.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
2
2015
05
01
Natural dyes extracted from black carrot and bramble for Dye-Sensitized Solar Cells
153
158
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.2015.75854
Two different natural dyes containing anthocyanin extracted from black carrot and bramble from Iran. Spectrophotometric evaluations of the natural dyes in solution and on a TiO2 substrate were carried out in order to assess changes in the status of the natural dyes. The results show that the natural dyes indicate buthochromic shift on the TiO2 substrates. The chemical adsorption of natural dyes present at the surface of TiO2 substrate that their chemical binding can be increased by the chelating effect to the TiIV ions. Finally, dye sensitized solar cells were fabricated in order to determine the photovoltaic behaviour and conversion efficiencies of each dyes and mixture of extracts. Such evaluations demonstrate conversion efficiencies of 0.33, 0.69 and 0.47 for black carrot, bramble and mixed extract, respectively. Natural dyes are suitable alternative photosensitizers for dye-sensitized solar cells due to simple preparation method, low cost, environmentally friendly and widely available
Natural dyes,Dye,sensitized solar cells,Photosensitizer,Conversion efficiencies,Anthocyanin
https://pccc.icrc.ac.ir/article_75854.html
https://pccc.icrc.ac.ir/article_75854_1ec52d1f0098b75923d3db32772eb54e.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
2
2015
05
01
Preparation of Reversible Thermochromic Ink for Flexography Printing on Paper and Study its Colorimetric Properties
159
168
EN
M.
Khanjankhani
Department of Polymer Engineering and Color Technology, Amirkabir University of Technology
m.khanjankhani1989@yahoo.com
M.
Khatibzadeh
Department of Polymer Engineering and Color Technology, Amirkabir University of Technology
khatib@aut.ac.ir
10.30509/pccc.2015.75855
Thermochromic printing inks could be security inks which respond to the color change when are being exposed to different temperatures. These inks with unusual chemical and physical specific characteristics are mostly produced for flexographic, screen and rotogravure printing systems under the supervision of skilled technical experts and with precise security controls. Since flexographic thermochromic inks can be used easily for smart packaging including different substrates, in this study a thermochromic ink was prepared with an activation temperature of 31 °C for flexographic printing. The dynamic colorimetric properties were studied during the range of 28-45 °C temperature. TC contrast and yellowness of TC sample were calculated during heating and cooling.
Thermochromic Ink,Microcapsule,Leuco Dye,Colorimetric,Reversibility,Color Hysteresis
https://pccc.icrc.ac.ir/article_75855.html
https://pccc.icrc.ac.ir/article_75855_a06b241c4b0976495d80d7d717ff4053.pdf