Study of immobilization of nano-TiO2 for environmental aspects on glass by different resin categories
S. M.
Hashemi
Young Research Club, Islamic Azad University, Shahr-e-Ray Branch
author
K.
Badii
Department of Environmental Research, Institute for Color Science and Technology
author
Sh.
Abdolreza
Faculty of Science, Islamic Azad University, Shahr-e-Ray Branch
author
text
article
2011
eng
TiO2 and especially its nano-metric structure have many applications for environmental proposes. It can be used in mobilized or immobilized status, but its consumption is less in immobilized form and its process would be economical. In addition, the environmental problems would be minimized. There are a few methods for immobilization of nano-TiO2 inside the process. The sol-gel method is typically applied for immobilization of nano-TiO2 on Pyrex and quartz glasses, but these two glasses are expensive. To reduce the costs, two different resins have been studied for immobilization of nano-TiO2 on conventional low cost glasses, but the glass coating and its surface preparation is very critical in order to increase the stability of catalyst and its life time. In this research, the immobilization process of nano-TiO2 has been studied, and the conditions of process and critical parameters have been delineated. Different experiments have been done to characterize the properties of prepared coating, such as hardness, water resistant, and differential scanning calorimetry (DSC).
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
4
v.
1
no.
2011
1
6
https://pccc.icrc.ac.ir/article_75780_d2efd9443b706e587e959d1c52a07dee.pdf
dx.doi.org/10.30509/pccc.2011.75780
Study of Desalination and Changing the Counter Ion of Mono-Chlortriazinyl َReactive Dye on Dyeing Nylon 6.6
A.
Soleimani-Gorgani
Department of Printing Science and Technology, Institute for Color Science and Technology
author
J. A.
Taylor
Hexagon Tower, Color Synthesis Solutions Ltd
author
text
article
2011
eng
Anionic reactive dyes used to dye nylon suffer from failures due to the poor efficiency caused by low degree of exhaustion and fixation. From the previous work , the dyeing efficiency of Procion Rubine XL on modified nylon was particularly week and hence offers the widest scope for an in depth investigation in to variables that effect the dyeing process. The variables dyeing studies for this process included evaluation the effect of changing the electrolyte concentration as well as the counter ion from sodium to trimethyl ammonium. Consequently reducing the electrolyte concentration and changing the counter ion resulted in reduced fixed colour yield.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
4
v.
1
no.
2011
7
14
https://pccc.icrc.ac.ir/article_75775_33dd4d3f9c2db3180c2dc093d95817c8.pdf
dx.doi.org/10.30509/pccc.2011.75775
Preparation of Water-Based Alkyd/Acrylic Hybrid Resins
A. A.
Yousefi
Department of Plastics , Iran Polymer and Petrochemical Institute
author
M.
Pishvaei
Departments of Resin and Additives, Institute for Color Science and Technology
author
A.
Yousefi
Institute for Color Science and Technology
author
text
article
2011
eng
Alkyd resins are amongst the most important and widely used resins in coating sectors. In this communication we report on preparation of alkyd resins emulsified by grafted acrylic resins on their fatty acid moieties. Both high-shear mechanical homogenizer and ultra-sonic sonicator were used step-wise to disperse the alkyd resin and acrylic based monomers in aqueous media. The resins are of nanometric particle size (~200nm) dispersed in water in the presence of polymerization emulsifying agent. The FT-IR spectroscopy revealed the differences in the spectrum of the base resins and hybrid resin. The extraction test revealed formation of better than 99% of grafted hybrid resin. The DSC test showed that the glass-transition temperatures of the hybrid resin are very lower than that of the base alkyd and acrylic polymers which re-confirm formation of chemically grafted hybrid resin. The molecular weight of the hybrid resin was also found to be a combination of those of the base resins. The polydispersity of the base resins locates itself around 8, whereas that of the hybrid resin locates around 32 which is resulted from differences in the molecular weight of the base resins. The films of the resulting resins fully dry after 8 hours at room temperature without any further loss in weight or tackiness.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
4
v.
1
no.
2011
15
25
https://pccc.icrc.ac.ir/article_75778_2a1b6e5a7880507b448c35bef52fa4ca.pdf
dx.doi.org/10.30509/pccc.2011.75778
Novel Naphthalimide Based Azo Disperse Dyes for Dyeing of Polyester Fabrics
K.
Gharanjig
Center of Excellence for Color Science and Technology,Department of Organic Colorants, Institute for Color Science and Technology
author
F.
Ameri
Department of Color Physics, Institute for Color Science and Technology
author
F.
Sadr Dadras
Department of Organic Colorants, Institute for Color Science and Technology
author
A.
Khosravi
Department of Polymer Engineering and Color Technology , Amirkabir University of Technology
author
text
article
2011
eng
A series of monoazo disperse dyes based on naphthalimide was synthesized using N-alkylcarboxylic acid-1,8-naphthalimide as diazo component and N,N-diethylaniline derivatives as a coupling components. 4-amino-N-ethanoic (propanoic) acid-1,8-naphthalimide was synthesized from 4-nitro-1,8-naphthalic anhydride by imidation and subsequent reduction reactions. These compounds were diazotized and further coupled to substituted N, N-diethylaniline to produce dyes which give red to violet hues on polyester fabrics. The prepared dyes and their corresponding intermediates were characterized by elemental analysis, DSC, FTIR, 1HNMR and UV-Vis spectroscopic techniques. The dyed polyester fabrics showed moderate light fastnesses, very good to excellent washing, rubbing and sublimation fastnesses.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
4
v.
1
no.
2011
27
37
https://pccc.icrc.ac.ir/article_75774_0210f1bd94dca5810deb938d8f4de8a2.pdf
dx.doi.org/10.30509/pccc.2011.75774
Spectral Estimation of Printed Colors Using a Scanner, Conventional Color Filters and applying backpropagation Neural Network
S.
Gorji Kandi
Polymer Engineering and Color Technology Departmen, Amirkabir University of Technology
author
text
article
2011
eng
Reconstruction the spectral data of color samples using conventional color devices such as a digital camera or scanner is always of interest. Nowadays, multispectral imaging has introduced a feasible method to estimate the spectral reflectance of the images utilizing more than three-channel imaging. The goal of this study is to spectrally characterize a color scanner using a set of conventional color filters. To this end, a 1355 chart was generated and printed; the images of the printed charts were scanned putting a translucent color filter in front of each page during scanning process. Each page was scanned with 4 color filters, including gray, blue, green and yellow ones. A feed-forward Back-Propagation neural network with 12 input neurons of camera responses, one hidden layer containing 20 neurons, and an output layer of 31 neurons of spectral reflectance values was applied. It was shown that it is accurately possible to estimate the spectral data of printed samples from the scanner responses using conventional color filters and the proposed NN with an average GFC value of 0.999. The mean of color difference error was about 0.612 CIEDE2000 (1:1:1) unit or 0.987 CIELAB unit.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
4
v.
1
no.
2011
39
49
https://pccc.icrc.ac.ir/article_75777_91fa4835da13ebb6be252096cc64f943.pdf
dx.doi.org/10.30509/pccc.2011.75777
Kinetic investigation of carbon nanotube deposition by DC electrophoretic technique
S.
Rasouli
Department of Nanomaterials and Nanocoatings, Institute for Color Science and Technology
author
A. R.
Gardeshzadeh
Department of Nanomaterials and Nanocoatings, Institute for Color Science and Technology
author
text
article
2011
eng
In this paper, kinetics of DC electrophoretic deposition EPD of carbon nanotubes CNTs is investigated. Carbon nanotubes suspended in pure ethanol with addition of magnesium nitrate was used as deposition media. The effect of main EPD parameters such as deposition time, applied voltage and the CNT concentration on deposit yield was investigated. The variation of current density vs. time and the effect of magnetic stirring were also examined. The results are in good agreement with Hamaker´s law and the deposit yield increases with voltage and CNT concentration but there is a deviation from linear trend in longer deposition times. Stirring could compensate some of this deviation but increases the current density fluctuations.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
4
v.
1
no.
2011
51
58
https://pccc.icrc.ac.ir/article_75776_e39b0cb608183150fdc5a523783c2c31.pdf
dx.doi.org/10.30509/pccc.2011.75776
The Effects of Illuminants and Standard Observers Combination on Relationship between Spectrophotometric Error and Colorimetric Inaccuracy
A.
Shams nateri
Textile Engineering Department, University of Guilan
author
text
article
2011
eng
The colorimetric error depends on the spectrophotometric inaccuracy. In this paper, a new method is introduced for determining the relationship between spectrophotometric error and colorimetric inaccuracy. The error propagation in colorimetric parameter calculation is evaluated using a linear relation between variance of reflectance spectra and CIE tristimulus values. This linear formula calculates the variance of CIE tristimulus values from the variance of reflectance spectra with sufficient accuracy. In addition, the effect of illuminants and standard colorimetric observers on the error propagation from spectral data into CIE tristimulus values is studied using the proposed relationship. The results indicate that the effect of illuminants is more than the effect of standard observer. In addition, the Standard deviation of CIE tristimulus values depends on their respective coefficients.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
4
v.
1
no.
2011
59
69
https://pccc.icrc.ac.ir/article_75779_3c108fd0044fd1ea37bc5b83a8ea7ebe.pdf
dx.doi.org/10.30509/pccc.2011.75779