Browsing by Author "Eid, B. M."

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Antibacterial functionalization of reactive-cellulosic prints via inclusion of bioactive Neem oil/beta CD complex
(ELSEVIER SCI LTD, 2011) Ibrahim, N. A.; Eid, B. M.; El-Zairy, E. R.
In the present research enhancing the antibacterial activity of cellulosic fabrics printed with reactive dyes was achieved through combined reactive printing and beta CD loading in one step followed by subsequent treatment with Neem oil, as an eco-friendly antimicrobial agent. Retention of Neem oil with its main compound azadirachtin within the hydrophobic cavities of beta CD moieties-attached the reactive cellulosic prints, via formation of host-guest inclusion complexes, to impart antibacterial functionality against G+ve (Staphylococcus aureus) and G-ve (Escherichia coli) bacteria was carried out. The experimental results reveal that post-treatment with Neem oil results in a remarkable improvement in the antibacterial activity of the treated reactive prints along with darker depth of shade and without adversely affecting the UV-blocking properties of the final products. Mode of interactions, surface morphology as well as washing durability of antibacterial and anti-UV functions were also investigated. (C) 2011 Elsevier Ltd. All rights reserved.
Cellulosic/wool pigment prints with remarkable antibacterial functionalities
(ELSEVIER, 2015) Ibrahim, N. A.; Eid, B. M.; Khalil, H. M.
Several bio-active agents namely choline chloride, triclosan derivative, PEG-600 and 4-hydroxybenzophenone were successfully included into solvent-free pigment formulations, in a single-stage process, followed by screen printing and microwave-fixation to obtain antibacterial functionalized cellulosic/wool pigment prints. Results obtained signify that both the improvement in functionalization and coloration properties are governed by type of antibacterial agent, kind of substrate as well as pigment colorant. The imparted antibacterial activity of the loaded bio-active agents follows the decreasing order: G+ve (Staphylococcus aureus) > G ve (Escherichia coli), keeping other parameters constant. The imparted functional and coloration properties showed no significant decrease even after 15 washings. Mode of interactions among the nominated substrates, the pigment paste constituents and the bioactive agents were also proposed. (C) 2014 Elsevier Ltd. All rights reserved.
A cleaner production of ultra-violet shielding wool prints
(ELSEVIER SCI LTD, 2015) Ibrahim, N. A.; Khalil, H. M.; Eid, B. M.
There is an urgent need to reduce the environmental impacts of textile wet processes taking in consideration product and environmental quality as well as economic concerns. Substitution of hazardous chemicals at the source and/or shortening the production steps are potential options which could be used to move towards cleaner production process and to cope with ever-increasing demands for eco-friendly textile products. In this research the possibility of enhancing both the ultra-violet shielding and coloration properties of wool fabric in a single-stage using beta-cyclodextrin or monochlorotriazinyl beta-cyclodextrin as well as certain ultra violet absorbers or blockers as additives to other environmentally benign printing paste components was investigated. The modified one-step coloration and functionalization method, using safer textile auxiliaries, less energy, and water consumption, proved to have positive impacts on the depth of the obtained prints and their fastness properties as well as on their ability to shield the harmful ultra-violet B-radiation without seriously affecting the environment. The enhancement in the imparted properties is governed by type of cydodextrin, degree of fixation onto/ within the wool structure, type and extent of immobilization of the used ultra violet protector, type of dye and its mode of interaction, as well as degree of interactions among the nominated printing paste components and the wool active sites during the steam fixation step. The imparted ultra-violet protection properties to the modified wool prints show obviously improved durability to wash compared to the unmodified ones. (C) 2014 Elsevier Ltd. All rights reserved.
Combined antimicrobial finishing and pigment printing of cotton/polyester blends
(ELSEVIER SCI LTD, 2013) Ibrahim, N. A.; Abou Elmaaty, T. M.; Eid, B. M.; Abd El-Aziz, E.
his study demonstrates the possibility of enhancing the antibacterial functionality and pigment printing properties of cotton/polyester blends (50/50 and 35/65) in one step. Inclusion of chitosan (10 g/kg), choline chloride (15 g/kg), triclosan derivative (20 g/kg), hyperbranched poly amide-amine/silver or zinc oxide nanoparticles (HBPAA/Ag-NP's hybrid or HBPAA/ZnO-NP's hybrid - 20 g/kg) into a pigment print formulation followed by printing and microwave curing at 386W for 5 min results in an improvement in antibacterial activity and pigment printability. It was further noted that, in all cases, the G+ve (S. aureus) bacteria is more susceptible to the action of the immobilized antibacterial agents than the G-ve bacteria (E. coli). The functionalized pigment prints exhibited very sufficient antibacterial activity even after 20 washing cycles. Modes of interactions were proposed, and surface modification was also confirmed by SEM and EDX analysis. (c) 2013 Elsevier Ltd. All rights reserved.
Functionalization of linen/cotton pigment prints using inorganic nano structure materials
(ELSEVIER SCI LTD,, 2013) Ibahim, N. A.; Eid, B. M.; Abd El-Aziz, E.; Abou Elmaaty, T. M.
The present work opens up a novel strategy for the development of new multifunctional cellulosic pigment prints. The developed process aims at modifying the solvent-free pigment printing formulations via inclusion of certain inorganic nano materials namely silver (Ag-NPs), zinc oxide (ZnO-NPs), zirconium oxide (ZrO2-NPs) or titanium dioxide (TiO2-NPs) at 20 g/kg paste followed by screen printing and microwave fixation. The imparted functional properties together with the depth of the obtained prints are governed by the type of nano additives, type of binder and the pigment colorant. The imparted antibacterial and/or UV protection properties to the pigment prints were retained with an acceptable level (>70%) of durability even after 20 washing cycles. The presence of nano materials on the surface of the obtained pigment prints was confirmed using SEM images and EDX spectra. (C) 2013 Elsevier Ltd. All rights reserved.
A new approach for imparting durable multifunctional properties to linen-containing fabrics
(ELSEVIER, 2017) Ibrahim, N. A.; El-Zairy, E. M.; Eid, B. M.; Emam, E.; Barkat, S. R.
This study focused on upgrading the antibacterial activity, UV-protection property, self-cleaning ability and durability to wash of linen and linen/cotton (50/50) blend fabrics to develop multifunctional textile materials without adversely affecting their hydrophilicity. Herein, linen-containing fabrics were first pre-carboxymethylated to create new active sites (-CH2COOH groups) to facilitate subsequent loading of selected active ingredients namely chitosan (Cs), organosilane quaternary ammonium compound (Si-QAC), silver-nanoparticles (Ag-NPs) and titanium oxide nanoparticles (TiO2-NPs) individually and in admixtures. The developed products, especially in case of using mixed active ingredients, exhibit a noticeable improvement in the imparted functional properties regardless of the used substrate. The effectiveness of the imparted functions is determined by type of substrate, its extent of modification, type, concentration and degree of fixation of the used active ingredient onto the pre-modified substrate. Functionalized samples loaded with mixed active ingredients demonstrated a high durability to wash even after 15 washing cycles. (C) 2016 Elsevier Ltd. All rights reserved.
Novel approach for improving disperse dyeing and UV-protective function of cotton-containing fabrics using MCT-beta-CD
(ELSEVIER SCI LTD, 2010) Ibrahim, N. A.; E-Zairy, W. R.; Eid, B. M.
The main goal of this work was to increase disperse dye substantivity for cotton cellulose containing fabrics via modification with monochlorotriazine-beta-CD (MCT-beta-CD), which posses hydrophobic cavities along with remarkable capability to form inclusion complexes with organic substances through host-guest interactions. The proper conditions for simultaneous alkaline-disperse dyeing as well as grafting of MCT-beta-CD onto and/or within cotton and cotton/PET (50/50) blend fabrics were presented. As a result of this novel approach, the obtained dyeings showed a remarkable improvement in their depth of shades along with a significant enhancement in their UV-protection properties. The extent of improvement in disperse dyeing and in subsequent UV-protecting is determined by the nature of substrate, extent of modification, type and concentration of PEG and disperse dye as well as the union-bath conditions, i.e. temperature, time and pH. Mode of interactions, SEM Of untreated and grafted C/PET fabric, as well as fastness properties of the obtained dyeings were also investigated. (C) 2009 Elsevier Ltd. All rights reserved
Novel pre-treatment processes to promote linen-containing fabrics properties
(ELSEVIER SCI LTD, 2008) Ibrahim, N. A.; El-Hossamy, M.; Hashem, M. M.; Refai, R.; Eid, B. M.
This study was undertaken to investigate the effect of plasma pre-treatment, followed by enzymatic treatment in the absence and presence of bleaching agent on the properties of linen and linen-containing fabrics. Different plasma gases (air, oxygen and nitrogen), enzymes (acid-cellulases, neutral-cellulase and alkaline-pectinase) as well as bleaching agents (peracetic acid and H2O2) were used. The changes in physico-mechanical properties, surface morphology and dyeing properties of the treated substrates have been investigated, The obtained results indicated that plasma pre-treatment followed by subsequent acid-cellulases/peracetic acid or alkaline-pectinase/H2O2 treatment result in: a dramatic improvement in hydrophilicity and wettability as well as in the degree of whiteness of the treated substrates, an improvement in reduction of surface roughness and extent of post-reactive dyeing, along with a weight loss and a drop in the tensile strength. The extent of surface modification as well as the changes in the above-mentioned properties are governed by the characteristics of the substrate, the plasma gas, the nature and dose of the used enzyme, as well as the type of bleaching agent and additive. The optimal treatment sequence for attaining better performance properties was O-2-plasma followed by alkaline-pectinase/H2O2 treatment in presence of PEG 400. (C) 2008 Elsevier Ltd. All rights reserved.
A smart approach for enhancing dyeing and functional finishing properties of cotton cellulose/polyamide-6 fabric blend
(ELSEVIER SCI LTD, 2011) Ibrahim, N. A.; El-Zairy, W. M.; El-Zairy, M. R.; Eid, B. M.; Ghazal, H. A.
Polyamide-6/cotton fabric blend was modified by chemical treatments using citric acid (30 g/L) as acrosslinker, an acrylate binder (10 g/L), Na-hypophosphite (6 g/L) as a catalyst in the presence of basic dye or pigment colorant (15 g/L) employing a pad-dry-cure technique (wet-pickup 80%, 80 degrees C/5 min and 180 degrees C/2 min respectively). Combined modifying and dyeing of the treated fabric samples resulted in a significant improvement in the extent of coloration along with a remarkable improvement in the imparted functional properties namely UV-B protection and antibacterial function. The change in K/S value as well as in the fastness properties ratings of the obtained dyeings along with variation in their functional properties depend on the ester-crosslinker/catalyst concentration, type and concentration of the coloring agent as well as thermo-fixation temperature. Mode of interaction was reported, and surface modification was also confirmed by SEM analysis. (C) 2010 Elsevier Ltd. All rights reserved.
A smart approach to add antibacterial functionality to cellulosic pigment prints
(ELSEVIER SCI LTD, 2013) Ibrahim, N. A.; Eid, B. M.; Abou Elmaaty, T. M.; Abd El-Aziz, E.
This study was devoted to enhancing the antibacterial functionality of pigment printed cotton, linen and viscose fabrics. Ag-NP's/PVP colloid, triclosan derivatives, chitosan or choline chloride was successfully incorporated into the pigment paste followed by printing and microwave curing to impart antibacterial activity to the cellulosic prints. Results obtained demonstrate that the modified pigment prints exhibit a remarkable antibacterial activity against the G+ve (Staphylococcus aureus) and G-ve (Escherichia coli) bacteria with a noticeable durability after 20 washing cycles without adversely affecting the printing and softness properties. The extent of printability and functionality of the nominated substrates are significantly governed by the type of: bio-active ingredient, binder, pigment and substrate. TEM, SEM and EDX analysis confirmed the formation of Ag-NP's/PVP colloid, of particle size range 7-14 nm, deposition of cross-linked-binder film onto the modified pigment prints, and the existence of elementary Ag and Si loaded onto fabrics surface, respectively. (C) 2013 Elsevier Ltd. All rights reserved.
Smart Options for Functional Finishing of Linen-containing Fabrics
(SAGE PUBLICATIONS INC, 2010) Ibrahim, N. A.; Eid, B. M.; Hashem, M. M.; Refai, R.; El-Hossamy, M.
This study examined an innovative approach to functional finishes of linen-containing fabrics. Modification of surface properties along with creation on new interactive site onto the fabrics surfaces, i.e., -COOH or -NH(2) groups, using oxygen-or nitrogen plasma followed by subsequent treatments with selected ionic dyes, certain metal salts, nano-scale metal or metal oxides, quaternary ammonium salt or nominated antibiotics were carried out to obtain linen-based textiles with upgrade UV-protection and/or antibacterial functions. The results detailed in this paper demonstrate that: (i) post-basic dyeing of oxygen plasma-treated substrates with C. I. Basic Red 24 brings about a significant improvement in the UV-protection and antibacterial activity against the G +ve (Staphylococcus aureus) and G -ve (Escherichia coli) bacteria, (ii) post-reactive dyeing of nitrogen plasma-treated substrates with C. I. Reactive violet 5, results in a remarkable improvement in both UV-blocking and antibacterial properties. (iii) the extent of improvement in the above-mentioned properties of the obtained dyeings is determined by the type of substrate, kind and concentration of the ionic dye, (iv) loading of the metal ions onto the preactivated fabric surfaces upgraded their UV-protection valued as well as their antibacterial efficiency, and the extent of enhancement is governed by the kind and concentration of metal salt as well as type of bacteria, (v) loading of nano-scale Ag, TiO(2), or ZrO onto the plasma-treated substrates brings about a remarkable improvement in their functional properties, (vi) loading of the used antibiotics or choline chloride onto the plasma-treated substrates gives rise to better antibacterial ability, (vii) both the UV-protection ability and the antibacterial activity of selected samples were retained even after 10 laundering cycles, and (viii) the options described here for attaining linen-containing fabrics with high functional properties are effective, simple and applicable.
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.