JOURNAL OF COLOR SCIENCE AND TECHNOLOGY
Year:2017 | Volume:10 | Issue:4|Papers Count:7

In this research, hyperbranched polyamidoamine with amine end groups was reacted with glycidyl methacrylate to produce a hyperbranched polymer ended in acrylate functional units. Chemical structure and molecular weight of produced molecule were proved by FTIR, 1H NMR, and GPC analyses. Different amounts of yielded acrylate structure was added to coatings based on epoxy methacrylate to monitor the effect of polymer on adhesion properties of UV-cured coatings. The results of DMTA analysis revealed that Tg of samples containing hyperbranched polymer was 8 °C lower than that of blank sample, indicating flexibility of obtained coatings. Eventually, adhesion test manifested improvement in adhesion of coatings containing acrylate coatings, so that sample contained 10 wt.% of this additive showed 37% increase in adhesion level.

The aim of present study was to investigate dyeing and fastness properties of chitosan-cyanuric chloride hybrid (Ch-Cy) modified woolen yarn with madder natural dye which is used in hand-knotted carpet pile. Modified yarns were dyed with madder root natural dye and the impacts of some important factors such as Ch-Cy concentration, madder dye concentration, pH, temperature, and time of dyeing were investigated. Optimum dyeing results were obtained using 2%owf of Ch-Cy, 100%owf of madder dye, dyeing pH=7, temperature of 100oC, and time of 60 min. Results revealed that Ch-Cy was effective in the improvement of dyeing properties of woolen yarns, so that the dye exhaustion and color strength values increased by 7% and 2 ratings, respectively. Fastness data against wash, light, and rub as well as colorimetric data indicated that wool modification did not impair color fastness of dyed substrates. Further, hue remained nearly unchanged compared to dyed pristine wool. Therefore, based on the results obtained, it was concluded that modification of woolen yarns with Ch-Cy resulted in better dyeing performance, deeper shades, and saving crude dye material in madder dyeing of wool.

Application of the green chemistry in preparation of nanomaterials has been developed and replaced instead of toxic solvents and reagents. ZnO nanoparticles have been synthesized via a novel green chemistry method using a water soluble N-sulfosalicylidene glycinato ligand. For this purpose, the inorganic complex, Zn/N-sulfosalicylideneglycinato water soluble ligand has been prepared by the condensation reaction of glycine amino acid with sulfosalicylaldehyde in the presence of zinc salt. Then ZnO nanoparticles have been synthesized by the thermal decomposition of inorganic complex precursor at temperatures of 400, 500 and 600 °C. The products were characterized by XRD, PL spectroscopy, UV-vis spectroscopy, STA, FT-IR, SEM and TEM. The results confirmed that ZnO nanoparticles were synthesized in water based medium, in the wurtzite phase and spherical morphology with the average particle size of 35-45 nm. The band gap energy was achieved about 3.2 which is 0.17 units less than that of the bulk ZnO.

In this study, surface modification of nano α-alumina with Surface modifier was silane coupling agent namely vinyl tri methoxy silane (VTMS) was implement. Salinization reaction under hydrolysis, condensation condition and different concentration of silane coupling agent with spot of isoelectric point of nano alumina was performed. After surface modification, to characterizing amount of grafting on the nanoparticles, Elemental analysis (CH), Fourier transform infrared (FTIR) spectroscopy were utilized. Vinyl Ester nanocomposites were prepared using various loadings of silane modified alumina nanoparticles. To quantitative interfacial interaction between treated nano particles and vinylester resin using tests SEM for assessment dispersion and surface fracture behavior, Dynamic mechanical thermal analysis (DMTA), Degree of cure, Haze value, Abrasion resistance (Tabber), acid chemical resistance and Pull Off adhesion. Results from FTIR and Elemental analysis revealed that the organic functional groups of the silane coupling agent layers were successfully grafted on the surface of the nanoparticles. The mechanical properties results of the vinyl ester revealed that, because of good interaction between particles and vinyl ester resin, were enhanced using 3 wt% alumina nanoparticles modified with 0.48 g silane compared with other samples.

Electro-proxone process is combination of ozonation process and electrolysis that to produce the hydroxyl radical. The aim of this study was to optimization of Electro-proxone process via response surface statistical model in decolonization of Acid Orange 7 dye from synthetic wastewater. In this study was used semi-batch reactor via four graphite electrodes by 2´10 cm dimension. The effect of pH (2-4), concentration of ozone gas (2-4 gr/hr.L), direct electric current (2-4 A), reaction time (15-30 min) parameters via response surface statistical model was investigated. Measuring of Acid Orange 7 dye with DR6000 and measuring of COD and TOC according to methods that presented in standard methods for the examination of water and wastewater book. The results indicates proper performance of this process in decolonization of dye and COD and TOC removal. Performance of process in optimum condition is pH=3.50, direct electric current=3.4A, concentration of ozone gas is 3.64 gr/hr.L and reaction time is 30 minute in 100 mg/L initial concentration of dye. In this condition efficiency of process obtained 86.42%. The process efficiency in COD and TOC removal in 60 minute to the maximum amount reached. The Electro-proxone process as a choices of advance oxidation process have good ability to decrease of dye industrial pollutants.

This research is based on to optimize the application of saffron’s petal as a natural dye in wool yarn dyeing process to produce blue shade. Saffron’s petal colorant substance is Anthocyanin, which can be used as natural dyes. Experimental design software was applied to optimize the effective dyeing parameters of wool dyeing such as tin chloride concentration as a mordant (0% to 3%), saffron petals concentration (50% to 200%), dyeing time (30 to 80 minutes) and the final temperature dyeing process (50 to 95oC) to get blue shade. In order to this, the color appearance, light and washing fastness of dyed samples was studied at different conditions dyeing. Statistical results of the quadratic polynomial model based on experimental results showed that tin chloride concentration (p<0.0001) and temperature dyeing (p<0.0001) have a significant effect on the blue shade of dyed wool samples with saffron petals. The dyed samples possess a hue angle from 75 to 235 degree, which is indicating of yellow to blue shades. Moreover, they presented a moderate up to good washing and light fastness and had a lowest staining effect on the cotton and wool fabric.

In this research two different zeolites as zinc cation reservoir were synthesized. The structure of zeolites was different regarding precursor of synthesis, particles size and shape, crystallinity degree and Si/Al ratio. First, the structure of zeolites was determined by XRD and SEM. The effect of zeolites containing zinc cation on the corrosion of mild steel in a sodium chloride solution was studied through taking advantage of electrochemical analysis such as electrochemical impedance spectroscopy and polarization as well as scanning electron microscopy surface analysis. The results indicated that the ability of zeolite to release inhibiting species not only is influenced by type of zeolite but also depends on Si/Al ratio and the amount of crystalline or amorphous structure.