Browsing by Author "Tawfik, T. M."

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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.
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.
Upgrading the functional properties of reactive dyed cotton knits
(TAYLOR & FRANCIS LTD, 2017) Ibrahim, N. A.; Ibrahim, D. F.; Eid, B. M.; El-Zairy, W. M.; Tawfik, T. M.
To cope with the greater demands for high quality protective clothing and to satisfy the ever-growing end-users' requirements, functional finishes of reactive dyed cotton knits were investigated in this study. Effect of bio, soft, anti-UV, water & oil repellent or anti-bacterial functional finish on some performance, functional and coloration properties of reactive dyed cotton knits was investigated. Experimental results revealed that the change in performance properties, the extent of improvement in the imparted functional properties as well as the variation in color properties after post-finishing were varied depending on type of functional finish, knit structure and kind of the bi-functional reactive dye. The functional finished cotton knits had excellent functional properties such as softness, anti-pilling tendency, UV-shielding, water/oil repellency, and antibacterial functionality, depending on type of the finish, without adversely affecting coloration properties of reactive dyed knitted fabrics. Additionally, SEM and EDX analysis of selected samples demonstrated the changes in their surface morphology as well as confirmed the existence of certain elements.