Browsing by Author "Shahin, A. A."

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    Fabrication of radically new colorants based on Indigo Blue Vat Dye/polymer/layered Silicate intercalated nanocomposites induced cotton prints with Batik and Denim effects
    (INNOVATIVE SCIENTIFIC INFORMATION & SERVICES NETWORK, INNOVATIVE SCIENTIFIC INFORMATION & SERVICES NETWORK, 2019-06) Shaban, H. A.; Allam, E. E; Abd El-Thalouth, I; Ragheb, A. A; Shahin, A. A.; Hebeish, A. A
    Our research outputs lead currently to a radically new base for innovation of a number of ultrafine colorants that are characterized by their involvement in the textile structure through mechanical trapping mechanism in addition to diffusion mechanism. These printing mechanisms are behind the high colour fastness and improved colour strength of the prints and also avoiding the lengthy steps involved in reduction and oxidation of the indigo vat dye associated with their harm effect on environment. The innovation comprises intercalation of indigo blue vat dye with the silicate layered nano-composite which is a natural clay known as Montmorillonite (MMT-K10). Four innovative hybrid nano-composites colorants are synthesized as per the following mixtures: (1) indigo vat dye/MMT-K10/chitosan mix; (2) Indigo vat dye/MMT-K10/in situ formed polyacrylamide mix; (3) Indigo blue vat dye/MMT-K10/citric acid mix and (4) Indigo blue vat dye/MMT-K10/chitosan/citric acid mix. The antibacterial ability of these ultrafine colorants to produce prints on cotton textiles as well as fastness properties and colour strength of these printed fabrics are reported.
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    Preparation, characterization and technological evaluation of CMC derived from rice-straw as thickening agents in discharge, discharge-resist and burn-out printing
    (ELSEVIER SCI LTD, 2012) Ragheb, A. A.; Nassar, S. H.; Abd El-Thalouth, I.; Ibrahim, M. A.; Shahin, A. A.
    Carboxymethyl cellulose samples of different D.S. values were prepared from rice straw via pulping followed by etherification with monochloroacetic acid under the catalytic action of sodium hydroxide. The prepared derivatives were assessed for D.S., rheological properties as well as suitability as thickening agents in different printing styles. It was found that carboxymethyl cellulose derived from rice straw is characterized by a non-Newtonian pseudoplastic behavior and its apparent viscosity at any specific rate of shear depends on the D.S. All the prepared derivatives could be used successfully as thickening agents in discharge and/or discharge/resist printing of cotton fabrics. Furthermore, they could be used also as thickening agent for burn-out printing style of wool/polyester blended fabrics using sodium hydroxide. Attractive samples could be obtained via using these techniques. (C) 2012 Elsevier Ltd. All rights reserved.