Browsing by Author "Allam, E. A."

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Effective acid printing of protein and nylon-6 fabrics using new thickening agents
(TAYLOR & FRANCIS INC, 2008) Ibrahim, N. A.; Abo-Shosha, M. H.; Allam, E. A.; El-Zairy, E. M.
Printing of wool, silk, and nylon-6 substrates with acid dyes using new thickening agents based on free radical polymerization of acrylic acid (AA) with tamarind seed gum (TG) or karaya gum (KG) was investigated. The depth of the obtained prints follows the decreasing order: PAA/TG2>PAA/TG1>PAA/KG1>PAA/KG2>GG. Increasing the new thickener concentration up to 75g and steam fixation at 105 degrees C for 30 minutes gives higher K/S values. Printability substrates follows the descending order: wool>nylon-6>silk.
Enzymatic Modification of Cotton/Wool and Viscose/Wool Blended Fabrics
(TAYLOR & FRANCIS INC, 2008) Ibrahim, N. A.; Allam, E. A.; El-Hossamy, M. B.; El-Zairy, W. M.
Con/wool and viscose/wool blended fabrics samples were biotreated with acid cellulases, neutral cellulase and/or protease enzymes for enhancing their performance properties. The experimental data indicate that: the extent of loss in weight is governed by the type of enzyme, i.e. Acid cellulases > Neutral cellulase > Protease > none, as well as nature of substrate, i.e., viscose/wool > cotton/wool; 2) incorporation of H(2)O(2) in enzymatic formulation results in an improvement in fabric whiteness as well as its hydrophilicity; 3) bio-treatment of the used blends results in an improvement in dyeability with anionic dyes, and the extent of improvement is governed by type of enzyme, nature of the substrate, as well as class of dyestuff; 4) two-steps enzymatic treatments gives better performance properties, and bio-treatment efficiency follows the descending order: (Acid cellulases Proteases) > Acid cellulases > Protease > none; and 5) subsequent soft finish of enzymatic - treated fabric samples gives rise to an improvement in fabrics resiliency and softness.
New thickening agents based on tamarind seed gum and karaya gum polysaccharides
(ELSEVIER SCI LTD, 2010) Ibrahim, N. A.; Abo-Shosha, M. H.; Allam, E. A.; El-Zairy, E. M.
Wool, silk and nylon-6 fabric samples were printed with reactive dyes using new thickening agents based on polymerisation adducts of acrylic acid (AA) with tamarind seed gum (TG), or karaya gum (KG) in comparison with the conventional guar gum (GG) thickener. The obtained data indicate that: (i) the printing efficiency is governed by the performance of the thickening agents, i.e. PAA/TG2 > PAA/TG1 > PAA/KG1 > PAA/KG2 > GG, as well as the nature of substrate, i.e. wool > nylon-6 > silk, (ii) the K/S values and fastness properties of the printed fabrics are determined by the type of reactive dye, and (iii) optimal printing properties, i.e. higher depth along with better fastness ratings, were achieved by using a printing paste containing PAATTG2 (7.5%, w/w); reactive dye (30 g/kg); urea (50 g/kg); and citric acid (10 g/kg), followed by drying at 85 degrees C for 5 min, and steaming at 105 degrees C for 30 min. (C) 2010 Elsevier Ltd. All rights reserved.
Options for enhancing performance properties of easy-care finished cellulose/wool blended fabrics
(TAYLOR & FRANCIS INC, 2008) Ibrahim, N. A.; Allam, E. A.; El-Hossamy, M. B.; El-Zairy, W. M.
This research work is an endeavor to enhance the performance properties of easy-care finished cellulose/wool, 70/30, blends. In this study, cotton/wool and viscose/wool blended fabrics were finished in the presence of certain anionic, cationic, polyol, or softening agents independently. The finished fabric properties, i.e., nitrogen and/or carboxyl contents, resiliency, hydrophilicity, dyeability with proper class of dyestuff (anionic or basic), as well as oil stain release rating were evaluated to determine the optimal finishing formulations for attaining better performance properties. For a given set of finishing formulations and conditions, it was observed that (1) inclusion of any of the anionic additives, i.e., citric acid, tartaric acid, lactic acid, and aspartic acid, or polyol additives, i.e., beta-cyclodextrin, PEG-600, and CMC-30, in the finishing formulation brings about an improvement in the aforementioned properties; (2) the extent of improvement is governed by both the nature of the additives and the substrate components; (3) the enhancement in fabric properties by adding any of the nitrogenous additives to the finishing bath follows the descending order: Chitosan(R) Quat(R)-188choline chloridetriethanolamine hydrochloride; and (4) addition of any of the softeners to the finishing bath results in an improvement in nitrogen content and fabric resiliency, and follows the decreasing order: Siligen(R) WW > Syltrit(R)30 > Leomin NI-ET > none, along with a decrease in finished fabric hydrophilicity.
UV-Protective finishing of cellulose/wool blended fabrics
(TAYLOR & FRANCIS INC, 2007) Ibrahim, N. A.; Allam, E. A.; El-Hossamy, M. B.; El-Zairy, W. M.
There is a growing need and special attention for using textile products to provide effective protection against such damage of UV-radiation, i.e., skin cancer, sun burn, and photo-aging, in the recent years. In this research work a new approach for upgrading the UV-protective properties of cotton/wool and viscose/wool blended fabrics for high quality/trans seasonal apparel, was investigated. Factors affecting the UVB-protection function of the aforementioned substrates such as type and concentration of finishing additives, as well as subsequent treatment with cu-acetate or dyeing with anionic or cationic dyes were studied. The experimental data show that: i) the enhancement in the UV-protection factor (UPF) of the finished fabrics is determined by the type of finishing additives, i. e., citric acid >= aspartic acid >= tartaric acid >= none, chitosan TEA. HCL >= choline chloride >= none, beta-cyclodextrin CMC-30 PEG-600 > none, and Siligen (R) WW > W Siligen (R) PEP >= Leomin (R) NI-ET >= none, regardless of the used substrate, ii) UPF values are governed by the type of substrate, i. e., viscose/wool > cotton/wool, irrespective of the used additives, iii) post- treatment with cu- acetate or post- dyeing with the used dyestuffs brings about a dramatic improvement in UPF values, and iv) UPF values are determined by the finishing regime and follow the descending order: