Browsing by Author "Ibrahim, Nabil A."

Now showing 1 - 5 of 5

Application of MCT-beta CD to Modify Cellulose/Wool Blended Fabrics for Upgrading Their Reactive Printability and Antibacterial Functionality
(KOREAN FIBER SOC, 2018-08) Ibrahim, Nabil A.; Khalil, Heba M; Eid, Basma M; Tawfik, Tawfik M.
Pre-loading of monochlorotriazinyl beta-Cyclodextrin (MCT-beta CD) onto/within viscose/wool (V/W) and cotton/wool (C/W) blended fabrics provide hosting cavities that can form host-guest inclusion complexes with reactive dyes in postprinting as well as with triclosan derivative or silver nanoparticles/hyperbranched polyamide-amine (AgNPs/HBPAA) composite in subsequent final antibacterial finishing step. Coloration properties, antibacterial activity against (S. aureus) and (E. coli) pathogenic bacteria, durability of the obtained products, according to the above mentioned route, to wash, surface morphology and composition of selected samples were investigated. Results obtained signify that premodification of the nominated substrates with MCT-beta CD (10 g/l), followed by reactive printing with mono-or bifunctional reactive dye (20 g/l), and subsequent post-finishing with triclosan derivative or AgNPs/HBPAA composite (15 g/l each) is an efficient treatments sequence for attaining reactive prints with significant antibacterial efficacy and noticeable durability to wash. Surface depositions of selected active ingredients were also confirmed using SEM and EDX analysis.
Improving transfer printing and ultraviolet-blocking properties of polyester-based textiles using MCT-beta-CD, chitosan and ethylenediamine
(WILEY-BLACKWELL, 2010) Ibrahim, Nabil A.; El-Zairy, Enas M. R.; El-Zairy, Mohammed R.; Khalil, Heba M.
This study demonstrates the possibility of improving the transfer printability and fastness properties, as well as the ultraviolet-protecting functionality, of polyester, polyester/wool, polyester/cotton and polyester/viscose woven fabrics via pretreatment with monochlorotriazinyl beta-cyclodextrin (MCT-beta-CD), chitosan or ethylenediamine, followed by subsequent transfer printing with sublimable disperse dyes. The modification variables as well as the transfer printing conditions were optimised. The experimental results reveal that generating hydrophobic cavities (via grafting of beta-CD) at the fabric surface, fixing of chitosan, with its amino groups, onto the finish/fabric matrix, or introducing amine functional groups, via aminolysis of the polyester component, results in obtaining transfer printed fabric samples with darker depth of shades and better fastness properties, as well as with higher ultraviolet-protecting functions. It was further noted that, in all cases, the enhancement in the imparted properties is governed by type of substrate, kind and extent of chemical modification, affinity for the sublimable disperse dyes, accessibility of generated hosting and fixing sites, as well as the ultraviolet-blocking capacities of the modified/post-printed substrates against damaging ultraviolet rays. The mode of interaction, as well as the surface morphology of some non-treated and treated fabric samples, was also investigated.
Loading of chitosan - Nano metal oxide hybrids onto cotton/polyester fabrics to impart permanent and effective multifunctions
(ELSEVIER, 2017) Ibrahim, Nabil A.; Eid, Basma M.; Abd El-Aziz, Eman; Abou Elmaaty, Tarek M.; Ramadan, Shaimaa M.
and durable multifunctional properties of cotton/polyester blended fabrics were developed through loading of chitosan (Cs) and various metal oxide nanoparticles (MONPs) namely ZnO, TiO2, and SiO2 onto fabric surface using citric acid/Sodium hypophosphite for ester-crosslinking and creating new anchoring and binding sites, -COOH groups, onto the ester-crosslinked fabrics surface. The surface morphology and the presence of active ingredients (Cs & MONPs) onto selected - coated fabric samples were analyzed by SEM images and confirmed by EDS spectrums. The influence of various finishing formulations on some performance and functional properties such as wettability, antibacterial activity, UV-protection, self-cleaning, resiliency and durability to wash were studied. The obtained results revealed that the extent of improvement in the imparted functional properties is governed by type of loaded-hybrid and follows the decreasing order: Cs-TiO(2)NPs> Cs-ZnONPs > SiO2NPs > Cs alone, as well as kind of substrate cotton/polyester (65/35) > cotton/polyester (50/50). Moreover, after 15 washing cycles, the durability of the imparted functional properties of Cs/TiO2NPs - loaded substrates marginally decreased indicating the strong fixation of the hybrid components onto the ester-crosslinked substrates. The obtained bioactive multifunctional textiles can be used for producing eco-friendly protective textile materials for numerous applications. (C) 2017 Elsevier B.V. All rights reserved.
Multifunctional cellulose-containing fabrics using modified finishing formulations
(ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, 2017) Ibrahim, Nabil A.; Eid, Basma M.; Abd El-Aziz, Eman; Abou Elmaaty, Tarek M.; Ramadan, Shaimaa M.
Several metal oxide nanoparticles (MO-NPs), namely ZrO-NPs, ZnO-NPs, and TiO2-NPs, have been used to modify traditional finishing formulations to develop multifunctional cotton-containing fabrics. The fabrics used were cotton (100%), cotton/polyester blend (65/35) and cotton/polyester blend (50/50), which were treated with each finishing formulation using the pad-dry-cure technique. The imparted functional properties in the absence and presence of the nominated MO-NPs were evaluated. The positive effects of the incorporated MO-NPs in improving and/or imparting new functional properties, like easy-care, UV-protection, antibacterial functionality, water and oil repellency and flame proofing efficiency, were shown to be governed by the type of substrate and its cellulosic/polyester components, type of MO-NPs, finishing formulation components and mode of interaction between the active ingredients and active sites of the treated substrate. Tentative mechanisms were suggested, and the surface modification and composition of the selected fabric samples were analyzed using SEM and EDX. Future studies will further investigate the impact of incorporating the nominated MO-NPs with other active ingredients in the finishing formulation on the durability of fabric against washing, as well as on the change in other performance and physicomechanical properties.
A new approach for durable multifunctional coating of PET fabric
(ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 08/01/2018) Ibrahim, Nabil A.; Eid, Basma M.; Khalil, Heba M.; Almetwally, Alsaid A.
This new approach aims to impart durable multifunctional properties to polyester fabric surface via premodification with sodium hydroxide followed by subsequent coating with proper active ingredients such as SiO2, TiO2, ZnO and ZrO2 nanoparticles using gelatin as a green binding agent. The obtained results signify that the enhancement in the imparted functional properties like antibacterial, UV-blocking, self-cleaning capability and softness properties is governed by type of binding agent, i.e. gelatin > polyacrylate as well as kind of included metal oxide nanoparticles (MO-NPs) into the coating paste. FTIR, SEM and EDS analysis confirm the surface modification and functionalization of PET fabric surface. The obtained multifunctional coatings exhibit a remarkable washing durability even after 15 washing cycles. (C) 2018 Elsevier B.V. All rights reserved.