Surface Modification of Polyesteramide-Based Hyperbranched Polymer Using Acrylic Acid and Study of its Impact on the Viscosity of TMPTA
F.
Mirshahi
Department of Surface Coatings, Institute for Color Science and Technology
author
S.
Bastani
Department of Surface Coatings, Institute for Color Science and Technology
author
M.
Ganjaee sari
Department of Nanomaterials and Nanocoatings, Institute for Color Science and Technology
author
text
article
2014
per
In this study a polyester amide-based hyperbranched polymer with hydroxyl end-groups is modified by the aid of acrylic acid. Replacement of hydroxyl groups by acrylic ones provide this potential for the hyperbranched polymer to be used in radiation curable systems. The modification is carried out through esterification reactions and various conditions such as reactants ratios and reaction times, leads to two different degrees of polymerization of 40% and 65%. Products characterizations are performed by Fourier Transformation Infrared (FT-IR) spectroscopy, Nuclear Magnetic Resonance (NMR) and Differential Scanning Calorimetry (DSC). Accordingly, with increase of conversion, the peaks position at 3200-3500 and 1730-1750 have decreased and increased respectively which shows the reduction of the concentration of hydroxyl and augmentation of concentration of ester carbonyl groups. Besides, based on the HNMR spectrum, appearance of three peaks in the range of 5.8 to 6.5 ppm confirms the existence of hydrogen atoms of acrylate groups in the modified hyperbranched polymer. Also, the influence of the hyperbranched polymer on the viscosity of Trimethylol Propane Triacrylate (TMPTA) is investigated. The results demonstrated that no significant changes in viscosity are detectable yet a slight increment in viscosity occurs.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
8
v.
4
no.
2014
261
270
https://jcst.icrc.ac.ir/article_76135_7444c3cca700170f33d0498b0f60a36a.pdf
Assessment of the Texture Matching of Images Using a Psychophysical Method
F.
Karimpour
Department of Textile Engineering, Isfahan University of Technology
author
H.
Izadan
Department of Textile Engineering, Isfahan University of Technology
author
S. A.
Hosseini
Department of Textile Engineering, Isfahan University of Technology
author
text
article
2014
per
This research is focused on designing the texture of a camouflage pattern in a way that it merges in a chosen background more effectively than a traditional camouflage pattern. To do so, six images of target area were chosen and the images were fractalised, in gray scale form, via Fourier technique. The colour of the fractalised images was reduced and digitalised. Employing a characterised LCD, a photo simulation experiment was made and by conducting a psychophysical method, detection technique, twenty-four observers assessed the hiding efficiency of the three camouflage patterns, named traditional, fractalised and digitalized patterns. In the psychophysical experiment, the observers were asked to click on the patterns as soon as they manage to see them. The experiment showed that the hiding efficiency of the fractalised and the digitalised patterns are much better than the traditional one, and the fractalised pattern outperforms the digitalised pattern, marginally.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
8
v.
4
no.
2014
271
281
https://jcst.icrc.ac.ir/article_76136_a8dabb759068551190a9c22b80339449.pdf
Preparation and Evaluation of Black Silicate Thermal Control Coating for Using on Satellite Surface
N.
Kiomarsipour
Department of Materials Engineering, Malek Ashtar University of TechnologyوShahin Shahr
author
R.
Shojarazavi
Department of Materials Engineering, Malek Ashtar University of TechnologyوShahin Shahr
author
text
article
2014
per
In this research, black silicate thermal control coatings were prepared with using two inorganic black pigments; copper oxide and iron oxide, in potassium silicate binder in three pigment to binder ratio then they were applied on aluminum substrate. The optical properties of coatings were measured by UV/vis spectrophotometer. Evaluation of the coatings general properties indicated that the adhesion of paint samples was equal to 5B. The bend and impact tests passed without any cracking and separating of coating from substrate and the coating weight loss after abrasion test was around three milligram. Evaluation of optical properties indicated that the coatings containing of copper oxide had lower absorptance than the coatings with iron oxide and later coatings were absorbed almost whole wavelengths from UV to VIS and pigment to binder ratio did not have significant effect on the coating absorptance. Its solar absorption and thermal emittance were 0.98 and 0.92 respectively.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
8
v.
4
no.
2014
283
293
https://jcst.icrc.ac.ir/article_76137_86248ed507e3b21f87941ed3f599d9ab.pdf
UV-Curable Silica-Novolac Epoxy Methacrylate Hybrid Resin for Surface Coating: Synthesis and Characterization
N.
Chavoshi
Departement of Resin and Additives, Institute for Color Science and Technology
author
M.
Rostami
Nanomaterials and nanocoatings Department, Institute for Color Science and Technology
author
M.
Ghahari
Nanocoating and Nanomaterials Department, Institute for Color Science and Technology
author
F.
Najafi
Department of Resin and Additives, Institute for Color Science and Technology
author
text
article
2014
per
UV-curing coating based on novolac epoxy acrylate resin was synthesized and formation of desired structures was confirmed by appearing of 1722, 810 and 945 cm-1 in the FTIR spectrums. In order to study the effect of presence of inorganic silica on the properties of synthesized resin, an organic/inorganic nano-composite was prepared using the synthesized resin and silica nano-particles. Scanning electron microscope (SEM) revealed very high agglomeration of nano particles, during this process that was due to the incompatibility of two organic and inorganic phases which could lead to inferior properties of the produced nano composite. In order to overcome this problem, the surface of silica nano-particles was modified by vinyltrimethoxy silane coupling agent using sol-gel method in order to increasing the compatibility of two organic and inorganic phases. Completion of surface modification process was investigated by using of FTIR spectroscopy, scanning electron microscope, thermo-gravimetric analysis and helium pycnometer, confirming the proper reaction of silane coupling agent on surface of silica particles. Characteristics of prepared nano-composite were investigated by dynamic mechanical thermal analysis, hardness, scratch resistance, and abrasion resistance, proving better mechanical properties of nanocomposites over the neat coatings. Measuring the haziness showed very little impact of presence of nano particles on the transparency of coatings that was due to surface modification of coatings which has led to more compatibility of organic and inorganic phases.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
8
v.
4
no.
2014
295
305
https://jcst.icrc.ac.ir/article_76138_6076892eaaf52f8079f7535ece74cda2.pdf
The Influence of Chain Extender Type on Physical Properties of Aqueous Polyurethane Dispersions
I.
Zargar lellahi
Faculty of Engineering, South Tehran branch, Islamic Azad University
author
M.
Khorasani
Color and Polymer Research Center, Amirkabir University of Technology
author
A.A.
Sabbagh Alvani
Color and Polymer Research Center, Amirkabir University of Technology
author
S.
Kiani
Faculty of Polymer Engineering and Color Technology, Amirkabir University of Technology
author
text
article
2014
per
In this study, an aqueous polyurethane dispersion based on polyester was synthesized. Fourier Transform Infrared Spectroscopy was used to monitor the end point of the polymerization. In addition, the effects of two different chain extenders were studied on the average molecular weight advancement by using gel permeation chromatography. Also, the modification of average particle size, thermal behavior of the basic resin and mechanical properties of the produced paint film were investigated by use of particle size analyzer, differential scanning calorimetry, hardness, flexibility and wet scrub tests, respectively. The results clearly explained that in constant molar ratio of NCO/OH, Using of 1,4 Butanediol as chain extender in comparison to Hexamethylenediamine, followed by decreasing in particle size, increasing in hardness and wet scrub that improved the mechanical properties of the final paint film.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
8
v.
4
no.
2014
307
316
https://jcst.icrc.ac.ir/article_76139_8145250c1c708a28710b72bf4d853df9.pdf
Preparation of Inorganic Heat Resistant Pigments by Synthesizing SiO2/TiO2 Nanoparticles on Zeolite
A.
Almasian
Department of Environmental Research, Institute for Color Science and Technology
author
M.
Parvinzadeh
Department of Textile, Islamic Azad University, Shahre Rey Branch
author
M.E.
Olya
Department of Environmental Research, Institute for Color Science and Technology
author
Gh.
Chizari Fard
Department of Textile, Yazd Branch, Islamic Azad University
author
text
article
2014
per
In this study, SiO2/TiO2- zeolite pigments were synthesized by immobilizing mixed silica and titanium dioxide nanoparticles on modified zeolite via a sol-gel method. The characteristics of pigments were investigated by Fourier – Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), Scanning electron microscope (SEM), Electron dispersive X-ray spectrometer (EDX) and thermal gravimetric analysis (TGA). FTIR spectra showed AL (IV) and Si-o-Ti bonds on zeolite. SEM and EDX results showed the presence of silica and titanium dioxide nanoparticles on zeolite. TGA result demonstrated an increase in thermal stability through immobilizing of silica particles in titanium dioxide. This ternary composite can use as a filler or coating agent in fire mans clothing.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
8
v.
4
no.
2014
317
324
https://jcst.icrc.ac.ir/article_76140_04f5d5a2996bad5e281d3deea2ac833d.pdf
Optimization of Affecting Parameters on Performance of the Electrocoagulation/Electroflotation Process by Combine Electrodes (Ti-Al) in Acid Black 1 Dye Decolonization in Aqueous
J.
Mehralipour
Department of Environmental Engineering, Hamadan University of Medical Sciences
author
A.
Shabanlo
مهندسی بهداشت محیط, Hamadan University of Medical Sciences
author
M.
Samarghandi
Department of Environmental Engineering, Hamadan University of Medical Sciences
author
H.
Zolghadr nasab
Department of Environmental Engineering, Hamadan University of Medical Sciences
author
text
article
2014
per
The Electrocoagulation/Electroflotation process is one of the successful methods in dyes wastewater treatment. This process by direct current electrical and metal electrodes can be removal of contaminants. The aim of this study was optimization of affecting parameters in (EC/EFP) by titanium and aluminum electrodes for decolorization of Acid Black 1 (AB1) from aqueous. In this study was used of four titanium and aluminum electrodes. By applying an electric current in 10-30 V range with control of ampere, initial pH in 5- 9 range and initial concentration of dye in 50-500 mg/L range study was done. The results indicate when pH=5, voltage and initial concentration were 30 V and 50 mg/L respectively the high efficiency of decolorization by EC/EFP done. Therefor this process has a good ability in dye removal. Efficiency of process decreased by changing the parameters.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
8
v.
4
no.
2014
325
332
https://jcst.icrc.ac.ir/article_76141_f34837e36c9a2d1242d7adadf33bc04b.pdf
Formation of Silver Nanoparticles and Lead Oxide Sub-Micron Particles in the Lustre Glaze of Il-Khanate Dynasty and Influence of Silver Nanoparticles Concentration on the Glaze Color
A.
Mesbahinia
Department of Physics, University of Sistan and Baluchestan
author
M.
Rashidi-Huyeh
Department of Physics, University of Sistan and Baluchestan
author
M.
Shirdel-Havar
Department of Physics, University of Sistan and Baluchestan
author
M.
Shafiee Afarani
Department of Material Engineering, University of Sistan and Baluchestan
author
text
article
2014
per
In this paper, different factors in fabrication processes of lustre glaze was, investigated. Then, the results of elemental, structure and microstructure characteristics of an Iranian lustre ceramics from Il-Khanate dynasty were presented. For this, XRD, XRF and SEM analysis were used. The XRF elemental analysis showed the presence of low particles included of silver in glaze lustre. The XRD pattern of the luster glaze confirmed the existence of silver (Ag) and tin dioxide (SnO2) phases. The SEM microstructure image of sample showed the formation of a thin layer of about 220 nm on the glaze surface, including of embedded silver nanoparticle with an average dimension of 45 nm. It was also shown that the glaze lustre formation process is a result of ion exchange in fabrication procedure. Finally, the reflectance spectrum of sample has been simulated to determine its color. For this the Maxwell-Garnet theory was applied and influence of silver nanoparticle concentration on color of lustre glaze was investigated. The colors of the lustre ceramics were reproduced very well by simulation.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
8
v.
4
no.
2014
333
338
https://jcst.icrc.ac.ir/article_76142_0cccca19365d5785790a728785737609.pdf
Synthesis and Characterization of C-TiO2@Fe3O4 Magnetic Nanoparticles for Degradation Direct Blue 71 Under Visible Light Irradiation
A.
Falah-Shojaei
Department of Chemistry, University of Guilan
author
A.
Shams-Nateri
Textile Engineering Department, University of Guilan
author
M.
Ghomashpasand
Department of Chemistry, University of Guilan
author
text
article
2014
per
In this research, C-TiO2@Fe3O4 magnetic nanocomposite was prepared via a sol-gel method and the removal of Direct Blue 71 pollution in precence of visible light has been investigated. In this nanocomposite core is magnetic nanoparticles of magnetite and shell is the carbon-doped TiO2. The surface morphology, structure, and crystalline phase of the nanocomposites were characterized using XRD, SEM and HRTEM techniques. Studies showed that the Fe3O4 core has inverse cubic spinel structure and in shell C-TiO2, Titanium dioxide has the anatase structure. Photocatalytic activity studies showed that as-prepared nanocomposites had high photodegradating behavior (95%) to Direct Blue 71 compared to the pure TiO2 nanoparticles. The effect of process parameters such as, catalyst loading, and initial concentration of Direct Blue 71 on the extent of degradation was investigated. The photocatalytic activity remained 85% after three reusing.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
8
v.
4
no.
2014
339
346
https://jcst.icrc.ac.ir/article_76143_8f2b809d475a896dfbb03da39cc99ee6.pdf