Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
1
2015
02
01
Nile Blue- Chitosan Composite as a new Electrochemical Sensor for Uric Acid on Glassy Carbon Electrode
1
9
EN
K.
Farhadi
Department of Chemistry, Urmia University
k.farhadi@yahoo.com
E.
Minei
Analytical Chemistry,
e.minaie@yahoo.com
10.30509/pccc.2015.75849
Nile blue-Chitosan NB-CH as a new type of organic days-organic composite was made using Nile blue and chitosan. The NB-CH composite was made using a 0.005 M solution of Nile blue NB and a 7 solution of chitosan. To do this, a mixture of Nile blue and Chitosan with the ratio of 2:1 was prepared. The electrocatalytic oxidation of uric acid UA has been studied on glassy carbon electrode by NB-CH using electrochemical techniques. The NB-CH electrode showed one pair of peaks in 0.5 M KHSO4 as a supporting electrolyte. The catalytic currents are linearly related to UA concentrations in the ranges of 3×10-5 to 1.8×10-4 M and limit of detection 1.2 ×10-6 M with surface coverage of 2 ×10-8 mol cm-2.
Nile blue,Chitosan,Dye,glassy carbon electrode,Uric Acid
https://pccc.icrc.ac.ir/article_75849.html
https://pccc.icrc.ac.ir/article_75849_7443fa3ce0e0436a7a8f7df01547e2aa.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
1
2014
09
20
Effect of Lightness on Blackness Preference of Black Fabrics
11
24
EN
R.
Jafari
Department of Color Physics, Institute for Color Science and Technology, P.O. Box: 16765-654, Tehran, Iran
jafari-ra@icrc.ac.ir
S. H.
Amirshahi
Department of Textile Engineering, Amirkabir University of Technology (Tehran Polytechnic), P. O. Box: 15875-4413, Tehran, Iran.
S. A.
Hosseini Ravandi
Department of Textile Engineering, Isfahan University of Technology, P. O. Box: 84156-83111, Isfahan, Iran
10.30509/pccc.2014.75844
In this paper, the effect of lightness on blackness preference of 216 black fabrics prepared by printing method is investigated. 18 observers including of 9 males and 9 females are asked to firstly rank order black fabrics with the same lightness values according to their preference. In the next step, observers are asked to define their blackness preference for blacks with different L values. Results show that while there are some neutral black fabrics, observers mostly prefer bluish-cyanish blacks. Besides, samples with the higher values of lightness and chroma are not preferred by observers especially if their hue angles lie in the first quarter of the hue area, i.e., 0-90o. Meanwhile, samples with the lowest lightness values are not preferred by most of observers because of their high chroma values. This achievement proves that lightness is not the only colorimetric attributes which influences on blackness preference.
Blackness preference,Lightness,Black,Visual assessment
https://pccc.icrc.ac.ir/article_75844.html
https://pccc.icrc.ac.ir/article_75844_9e0e66415f55ba18e4ebdadeb9b9b389.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
1
2014
10
07
Butea frondosa flower dye extraction optimization through Taguchi design
25
35
EN
P.
Patil
Department of Technology, Shivaji University
pdpchem@gmail.com
A.I
Wasif
Department of Textiles, Textile and Engineering Institute
unishivaji.btech.chemical@gmail.com
S.V
Anekar
, Department of Chemical Engineering, T.K.I.E.T Warananagar
doulatnangare2000@yahoo.co.in
J.R.
Nagla
Department of Textiles, Textile and Engineering Institute
pdp_tech@unishivaji.ac.in
10.30509/pccc.2014.75847
In the past few decades, there is increasing trend to use products from natural resources. Dyes obtained from natural sources are among such products. The present research mainly focuses on optimization of extraction conditions during a natural dye extraction from the flower petals of a tree ‘Flame of Forest’. Taguchi technique was employed for optimization of the parameters namely raw dyestuff particle size, solid-liquid ratio, time of extraction and method of extraction assistance. The results indicated that 150 micron particle size, 1:20 solid-solvent ratio, two hours for extraction and enzyme addition as assistance for extraction were the optimum conditions for extraction. The optimum and control extractions were compared for their absorbance values and the subsequent dye yields. The respective absorbance values were 1.144 and 1.036. It was encouraging to observe 10.58 yield increment in the extraction with optimized parameters.
Natural Dye,Extraction optimization,Taguchi design
https://pccc.icrc.ac.ir/article_75847.html
https://pccc.icrc.ac.ir/article_75847_b3feb47764df596e2f58bc739847cd44.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
1
2014
10
07
Comparative study on the effect of heat treatment temperatures on colorimetric properties of CoFe2O4 nanoparticles and CoFe2O4/SiO2 nanocomposites
37
45
EN
M.
Gharagozlou
Department of Nanotechnology and Nanomaterials, Institute for Color Science and Technology
gharagozlou@icrc.ac.ir
R.
Jafari
Department of Color Physics, Institute for Color Science and Technology
jafari-ra@icrc.ac.ir
10.30509/pccc.2014.75848
In this paper, a comparative study on the effect of different heat treatment temperatures, i.e., 400, 500, 600 and 700 oC on colorimetric properties of CoFe2O4 nanoparticles has been done for the first time. Then, the mentioned Co-Fe mixed oxide pigments are dispersed in an amorphous silicon oxide matrix to form CoFe2O4/SiO2 nanocomposites. In the next step, the optical properties of nanocomposites treated in different temperatures are investigated and compared with those of nanoparticles. Results show that increasing of treatment temperature from 400 oC to 700 oC leads to more neutral nanoparticles and nanocomposites, while the lightness attributes of them behave reversely. Besides, the gradient of lightness variation in nanoparticles is higher than that of nanocomposites. Meanwhile, regarding to the calculated color difference values, it is found that by increasing of treatment temperature the colorimetric variations between nanoparticles and nanocomposites increase.
CoFe2O4 nanoparticles,CoFe2O4/SiO2 nanocomposites,Heat treatment temperature,Colorimetric attributes
https://pccc.icrc.ac.ir/article_75848.html
https://pccc.icrc.ac.ir/article_75848_84a09912705e19eaa2195986f7714dd2.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
1
2014
09
11
Degradation of C. I. Basic Blue 41 using modified TiO2 nanocomposite in a Rectangular Semibatch Photoreactor
47
57
EN
S.
Mohammadi-aghdam
Department of Chemistry, Payame Noor University
sarvin_s108@yahoo.com
M. E.
Olya
Department of Environmental Research, Institute for Color Science and Technology
olya-me@icrc.ac.ir
10.30509/pccc.2014.75843
The aim of this work was to investigate effect of operational parameters on the photocatalytic degradation efficiency of a solution containing C. I. Basic Blue 41 BB41 in a recirculated rectangular photoreactor irradiated with a UV light. TiO_2 nano composite film was prepared via sol-gel dip coating method. The films were characterized by X-ray diffraction XRD, transmission electron microscopy TEM, scanning electron microscopy SEM and atomic force microscopy AFM. Initial concentration of BB41 10-50 〖mg L〗^-1, flow rate 6-15 〖L.h〗^-1 and temperature 20-40℃ were the variables that mostly influenced the degradation efficiency. The results showed that the removal efficiency decreases as the initial concentration and flow rate increases, but it increases when the temperature increased. The mineralization of BB41 was followed by UV-vis analyses changes and chemical oxygen demand COD decrease. The results indicated 92.943 mineralization of 25 〖mg L〗^-1 dye at after.2h of UV irradiation.
Advanced oxidation processes (AOPs),TiO_2nano composite film,Chemical Oxygen demand (COD)
https://pccc.icrc.ac.ir/article_75843.html
https://pccc.icrc.ac.ir/article_75843_71f53b880b8b6f4c4f1b43395741a023.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
1
2014
09
12
Extraction, Identification and Thermal Stability of Anthocyanins from Eggplant Peel as a Natural Colorant
59
67
EN
Z.
Bahreini
Department of Chemical technologies, Iranian Research Organization for Science and Technology (IROST)
bahreiniz@yahoo.com
V.
Heydari
Department of Chemical technologies, Iranian Research Organization for Science and Technology (IROST)
vahid.heidary.1982@gmail.com
B.
Vahid
Department of Chemical Engineering, Tabriz Branch, Islamic Azad University
behrouz.vahid@yahoo.com
M.
Asadi
Department of Chemistry, Shahre-e-Qods Branch, Islamic Azad University
asadi.a200@yahoo.com
10.30509/pccc.2014.75845
In the present study, various mixtures of aqueous ethanol and acetone solutions were utilized to extract anthocyanins from eggplant peel by a discontinuous process to obtain a natural red-purple colorant. First, the most appropriate combination for extraction solvent was selected as ethanol 70 wt in water acidified with acetic acid 3 wt, which was determined by analysis of extraction yields and total anthocyanins content of extracts utilizing UV-Visible spectrophotometer. Then, the extracted anthocyanins were recognized and quantified by high performance liquid chromatography with diode array detector HPLC-DAD and characterized by high performance liquid chromatography equipped with tree-dimensional mass spectrometry HPLC-MS3 measurements. According to HPLC-DAD and HPLC-MS3 analyses the major anthocyanin in eggplant skin was delphinidin-3-rutinoside 91.43. Eventually, the thermal stability of extracted anthocyanins was estimated along 15 days using varied temperature values. Results demonstrated th
Eggplant,Anthocyanins,Extraction,Stability,Natural food colorant
https://pccc.icrc.ac.ir/article_75845.html
https://pccc.icrc.ac.ir/article_75845_eb633ef1d9675180c1059f1757d93336.pdf
Institute for Color Science and Technology (ICST)
Progress in Color, Colorants and Coatings
2008-2134
2383-1790
8
1
2014
12
20
Application of Electrochemical Noise to Investigate Corrosion Inhibition Properties of Some Azole Compounds on Aluminum in 0.25 M HCl
69
86
EN
B.
Ramezanzadeh
Department of Surface Coating and Corrosion, Institute for Color Science and Technology
ramezanzadeh-bh@icrc.ac.ir
M.
Mehdipour
Department of minning and Material Engineering, Amirkabir University of Technology
mehipour@yahoo.com
S. Y.
Arman
Department of minning and Material Engineering, Amirkabir University of Technology
arman@yahoo.com
10.30509/pccc.2014.75846
The corrosion inhibition properties of the benzothiazole BTH and benzotriazole BT inhibitors on the aluminum in 0.25 M HCl solution were studied. Electrochemical impedance spectroscopy EIS, electrochemical noise EN and potentiodynamic polarization techniques were used to investigate the inhibition properties of the inhibitors. Scanning electron microscope SEM was also utilized in order to investigate the surface morphology of the samples. Results showed that benzotriazole BT and benzothiazole BTH reduced the corrosion rate of the aluminum significantly. A higher corrosion inhibition efficiency of the BT compared with BTH was obtained. It was shown that EN is an appropriate technique for studying the corrosion inhibition properties of the corrosion inhibitors.
Aluminum,Corrosion inhibitors,Electrochemical Impedance Spectroscopy (EIS),Electrochemical noise resistance
https://pccc.icrc.ac.ir/article_75846.html
https://pccc.icrc.ac.ir/article_75846_9dfc2d37bc8a41f4827bcaba8d182c4f.pdf