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RISS 인기검색어
- 검색키워드
- 저자 : Hanan Elsisi (검색결과 4 건)
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Tarek Abou Elmaaty,Hanan Elsisi,Ilham Negm 한국섬유공학회 2021 Fibers and polymers Vol.22 No.5
Using disperse dyes of different colors and hues to produce a variety of shades is necessary for the industrializationof supercritical fluid dyeing of polypropylene. Eight derivatives of 3-(3-chlorophenyl)-1-phenyl-4-(diazenyl derivatives)-1Hpyrazol-5-amine dye were synthesized explicitly for use in supercritical carbon dioxide medium. Polypropylene dyeing wasstudied in supercritical carbon dioxide under varying conditions: Dyeing temperatures ranged from 100 °C to 120 °C, dyingtimes ranged from 1 h to 2 h, concentrations ranged from 2 % owf (on the weight of fabric) to 4 %, and pressures ranged from15 to 25 MPa. Significant improvement of the colorfastness to washing and rubbing was observed. Raman spectroscopy wasperformed and showed conclusively that the dye was absorbed within all layers of polypropylene. This study achieved theelimination of water and its costly processing in the dyeing of synthetic fabrics.
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Tarek Abou Elmaaty,Mamdouh Sofan,Tamer Kosbar,Hanan Elsisi,Ilham Negm 한국섬유공학회 2019 Fibers and polymers Vol.20 No.12
The development of a water-free dyeing process for synthetic fabrics is of great importance for the textile industrydue to environmental and economic reasons. In this study, a series of novel 3-(3-chlorophenyl)-1-phenyl-4-(diazenylderivatives)-1H-pyrazol-5-amine dyes were specifically synthesized for use with supercritical carbon dioxide. The new dyeswere characterized by MS, IR, and NMR spectral data, and the results were found to be in good agreement with the proposedstructures. The new dyestuffs were applied to dye polyester and nylon 6 fabrics under supercritical carbon dioxide andaqueous media. The color uptake expressed through the color strength (K/S) was assessed, and the values obtained showedthat the dyeing of polyester and nylon 6 fabrics using the scCO2 method was significantly better than that using the aqueousmethod. The fastness properties of all the dyed fabrics were evaluated and exhibited excellent results. Raman microspectroscopy indicated conclusively that the dye absorbance took place through all layers of the fabrics. Elimination of waterand its costly processing can now be achieved in the dyeing of synthetic fabrics.
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Eco-friendly Approach for Dyeing Synthetic Fabrics with Natural Dyes Using Electron Beam Irradiation
Tarek Abou Elmaaty,Shahinaz Abouelenin,Hanan Elsisi,Satoko Okubayashi 한국섬유공학회 2022 Fibers and polymers Vol.23 No.3
In this article, the dyeing properties of polypropylene, nylon 6, and polyester, which were pretreated using electronbeam irradiation, were investigated. The effects of exposure doses (0-300 kGy) and different oxidation periods in the air onthe synthetic fabrics were studied. The optimum conditions were achieved at 300 kGy for 1-hour oxidation time. The dyeabsorbance occurred in all layers of the fabrics, as determined using Raman spectroscopy. Further, the morphology andchemical composition of the surface of the fabric were studied using scanning electron microscopy. Additionally, the dyeingprocedure exhibited good coloration behavior and features, commercially acceptable leveling properties, and excellent colorfastness.
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Tarek M. Abou Elmaaty,Fathy M. El-Taweel,Hanan G. Elsisi 한국섬유공학회 2018 Fibers and polymers Vol.19 No.4
A novel disperse azo dye for dyeing polyester and nylon 6 fabrics in supercritical carbon dioxide (scCO2) fluid has been synthesized. 3-cyano acetyl indol was used as the starting material, which reacted with aryl/heteroaryl diazonium salts to afford arylhydrazonopropanenitriles. The newly synthesized compounds were characterized by elemental analysis, IR and 1H-NMR spectroscopy, and the results were observed to be in good agreement with the proposed structures. The influence of scCO2 working conditions, such as dyeing concentration, pressure, temperature, and dyeing time, on fabric color strength were studied. Moreover, the color strength was examined in detail. In addition, the position of color in CIELAB coordinates (L*, a*, b*, h*, C*) was assessed. The color fastness of the dyed samples provided excellent results. The ATR-FTIR results of the dyed samples were found to match the proposed structure.
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