Browsing by Author "El-Hossamy, M. B."

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Effect of Knit Structure and Finishing Treatments on Functional and Comfort Properties of Cotton Knitted Fabrics
(SAGE PUBLICATIONS INC, 2010) Ibrahim, N. A.; Khalifa, T. F.; El-Hossamy, M. B.; Tawfik, T. M.
This study demonstrated that the changes in functional and comfort properties of knitted cotton fabrics were determined by the knitted structure as well as type and concentration of finishing agent. To improve the comfort properties, one should ensure the smoothness of fabric surface, air permeability, heat transmittance as well as hydrophilicity of the knitted fabrics, by selecting the proper knit structure and/or by applying the proper finish such as bio-finish. Soft-finished fabric samples had lower tendency to shrinkage and lower stiffness unless compared with other finished fabrics. The functional properties of the finished cotton knits, i.e., antibacterial and water repellent, depend to a great extent on the type of finish.
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.
Factors Affecting the Functional- and Comfort-related Properties of Reactive Dyed Cotton Knits
(SAGE PUBLICATIONS INC., 2011) Ibrahim, N. A.; Khalifa, T. F.; El-Hossamy, M. B.; Tawfik, T. M.
In this study, three different reactive dyed single jersey cotton knits produced from different yarn counts, i.e., Ne 20/1, Ne 24/1, and Ne 30/1 were selected for studying the impact of functional finishes, i.e., soft, bio-antibacterial, and water-repellent, on their performance and comfort-properties. It was found that the variation in the evaluated properties is very much dependent on the yarn count as well as on the type and concentration of the finishing agent. An improvement in pilling levels and tactile properties, i.e., smoothness and softness, as well as in comfort properties, i.e., heat transmittance, air permeability as well as water-absorption, is achieved by the bio-treatment. An enhancement in dimensional stability, pilling levels, bursting strength, tactile properties along with a reasonable improvement in antibacterial efficiency is obtained by soft-finishing, taking in consideration its tendency to entrap heat and air inside the fabric structure. The same holds true for water-repellent treatment, in addition to its outstanding water-repellency the antibacterial finish imparts superior antibacterial activity to the fabrics with marginal or little effect on other properties.
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: