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Aly A.S.,Textile Research Division | El-Sayed D.R.,Helwan University | Zahran M.K.,Helwan University
Egyptian Journal of Chemistry | Year: 2012

SILVER loaded chitosan /methoxy polyethylene glycol chloro triazine (Ag/chit-MPEGT) core/shell nano particles were synthesized as a durable finish for cotton fabrics. Ag/chit-MPEGT was firstly synthesized by reaction of silver loaded chitosan (Ag-chit) with methoxy polyethylene glycol dichlorotriazine. The latter was prepared by reaction of MPEG with 2,4,6-trichloro-s-triazine in acetone and sodium carbonate. Silver loaded chitosan(Ag/chit) nanoparticles were prepared by Ionotropic gelatin method. The resulting Ag/chit-MPEGT core/shell nano-particles were characterized by IR-spectra, 1H NMR spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM) and elemental spectroscopy imaging (ESI). The cotton fabric is treated with the prepared core/shell nanoparticles using the conventional and convenient pad-dry-cure techniques to impart the durable antimicrobial properties. Citric acid was used as a crosslinking agent to improve the morphology, the crease resistance and the durable press finishing of the treated fabric. The latter was tested for the fabric surface morphology, crease resistance, break tensile strength, elongation-at-break, air permeability and antimicrobial activity.

Hamouda T.,Textile Research Division | Kilic A.,TEMAG Labs
Polymer Composites | Year: 2015

Sandwich composites based on coir fiber nonwoven mats as core material were manufactured by Vacuum Assisted Resin Transfer Molding technique. Mechanical and physical properties of produced coir/polyester and coir-glass/polyester composites were assessed. Samples were evaluated according to their reinforcement contents, resin contents, areal density, and thickness. Tests on physical properties revealed that coir-glass/polyester sandwich structure has the lowest values of thickness swelling, water absorption and moisture contents compared with coir/polyester composite. Mechanical tests such as tensile strength, open-hole tensile strength, and flexural strength were also performed on all samples. Coir-glass/polyester sandwich structure showed significant increase in tensile strength of 70 MPa compared with 8 MPa of coir/polyester composite. Introducing two skins of fiber glass woven roving to coir/polyester increased its flexural strength from 31.8 to 131.8 MPa for coir-glass/polyester. © 2015 Society of Plastics Engineers.

Abdel-Fattah S.H.,Textile Research Division | El-Khatib E.M.,Textile Research Division | Kantouch A.M.,Textile Research Division | El-Zawawi I.K.,National Research Center of Egypt
Energy Education Science and Technology Part A: Energy Science and Research | Year: 2010

Wool is a suitable medium for growing bacteria and fungi under favorable temperature and humidity conditions resulting in wool degradation and skin irritation or infections. Several investigations have been applied to impart antimicrobial finish of wool fabrics based on organic chemicals, but they are not environmental friendly. The present investigation aims to study the influence of treatment with metallic ions as well as silver nanoparticles, by nanolayer condensation, on wool fabrics, for improvement of its properties. Wool treated with the aforementioned methods show antimicrobial activity, UV-protection properties and improvement in conductivity and crease recovery. The changes in surface morphologies were observed. © Sila Science.

El-Sayed A.A.,Textile Research Division | Salama M.,Textile Research Division | Dorgham S.M.,National Research Center of Egypt | Kantouch A.,Textile Research Division
Indian Journal of Fibre and Textile Research | Year: 2015

Viscose fabrics have been modified to enhance the attraction for nano metal oxides, namely aluminum oxide, zinc oxide or titanium (IV) oxide, to impart antimicrobial activity against Escherichia coli and Candida albicans. Viscose fabrics are pretreated with 3-bromoprpionic acid prior to loading with nano metal oxides. Optimization of the acid concentration is reported. The overall results show a unique ability to stop microorganisms growth on the viscose fabrics pretreated with 3-bromopropionic acid and after treatment with nano metal oxides. The ability of nano metal oxide treated viscose fabrics to reduce the microbial growth is found in the following order: zinc oxide > aluminum oxide > titanium (IV) oxide. The durability of antimicrobial activity has been tested after thirty wash cycles. © 2015 National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.

Hakeim O.A.,Textile Research Division | Abdou L.A.W.,Textile Research Division | El-Gammal M.S.,Textile Research Division | El-Naggar A.M.,National Center for Radiation Research And Technology
Carbohydrate Polymers | Year: 2012

Accelerated electrons delivered by electron beam accelerator were used to fix vat colors, incorporated in curable formulations containing diluting monomer and an oligomer, to cellulosic fabric, cotton and polyester fabric. Tetrahydrofurfuryl acrylate, hexane dioldiacrylate, monomers and trifunctional urethane methacrylate, oligomer were used as curable base beside ethylene glycol. The fabrics were printed with these formulations and exposed to various doses of electron beam irradiation generated from the 1.5 MeV (25 kW) electron beam accelerator machine. Critical factors included the irradiation dose, formulation composition, and vat color concentration were studied. The fabrics printed with the vat colors by electron beam irradiation displayed higher color yield than those fabrics printed by the conventional curing at equal vat color ratios. The durable properties of fabrics printed by electron beam irradiation except the roughness properties are extremely better than those printed by conventional fixation method. © 2011 Elsevier Ltd. All rights reserved.

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