Melt spinning of polypropylene fibers containing silver and zinc nanoparticles was investigated. The nanometals were generally uniformly dispersed in polypropylene, but aggregation of these materials was observed on fiber surface and in fiber cross-sections. The mechanical properties of the resulted composite fibers with low concentration of nanometal were comparable to those for the control PP yarns. Extruded composite fibers that contained 0.72% silver and 0.60% zinc nanoparticles had outstanding antibacterial efficacy as documented by the percentage count reduction growth of Escherichia coli and Staphylococcus aureus. Fibers containing silver particles had improved antistatic properties.

SYNOPSISPolypropylene fabric was gamma pre-irradiated at doses of 1,2, and 3 Mrads. The irradiated fabric was grafted with an aqueous solution of 2-(dimethylamino) ethyl methacrylate. The graft yield was studied as a function of the different variable conditions such as storage time, monomer concentration ( 10-40%), reaction time, and temperature ( 50, 70,lOO"C). The grafted polypropylene was further quaternized with dimethyl sulphate or monochloroacetic acid. The grafted and quarternized fabrics were dyed with an acid dye. The fixation properties of the dyed samples were determined by DMF extraction. The moisture regain and mechanical properties were also measured.

The synthesis of immobilized β‐cyclodextrin derivatives onto polyamide‐6 fabric is presented. These novel fabrics were prepared by graft‐copolymerization of glycidyl methacrylate (GMA) onto polyamide 6 fabric, using a chemical redox system K2S2O8/CuSO4·5H2O, followed by reaction of β‐cyclodextrins (CD) or monochlorotriazinyl (MCT β‐CD) with the GMA epoxy group. Some biocidal guests were complexed into CD cavity including p‐hydroxy benzoic acid, AgNO3–ethanolamine mixture, iodine, N,N‐diethyltoluamide (DETA), citronella, jasmine, and sweet basil. Characterization of the novel fabrics was done by Fourier transform infrared spectroscopy (IR), electron scanning microscopy (SEM), and thermo gravimetric analysis (TGA). The biocidal activity of the grafted fabrics was tested against five strains of microorganisms. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 2586–2593, 2006

ABSTRACT:The synthesis of a cationic surfactant was based on diethanolamine and alkyl halides such as cetyl bromide with epichlorohydrin as a quaternizing agent. It was characterized by the elemental microanalysis of nitrogen and chloride and infrared spectroscopy. Polyester (PET) crepe fabric was pretreated with a series of solvents, including tetrachloroethane and tetrachloroethylene, at 25, 50, and 100°C. Untreated and solvent-pretreated PET fabric was hydrolyzed with 8 g/L NaOH at 100°C in the absence and presence of a cationic surfactant as a catalyst, and the weight loss was determined. The effects of solvent pretreatment on alkaline hydrolysis and PET dyeing were also examined.

P OLYPROPYLENE (PP) is a cheap fabric, bearing chemical resistance and excellent mechanical properties. PP is hydrophobic in nature, inactive synthetic fabric due to the absence of reactive functional groups in the molecular structure, thus preventing its dyeing. For this reason, PP fibers are modified by irradiation methods to form free radical centers onto the surface and graft copolymerization of selected vinyl monomers. Different irradiation techniques are adopted involving plasma discharge, electron beams, ozone, UV, γ-rays and others. PP is grafted with selected monomers including methacrylate derivatives such as (2N-Dimethyl amino ethyl methacrylate, 2N morpholino ethyl methacrylate, 2-ethyl methacrylate phosphoric acid, methyl methacrylate, 2-hydroxy ethyl methacrylate) acrylic acid, styrene, chloro methyl styrene, vinyl acetate etc... The different variable factors affecting irradiation and grafting reactions are considered such as irradiation dose, storage time of irradiated fabric, monomer concentration, reaction time and temperature. Physical properties of grafted and those containing tertiary amino quaternized groups are improved for increase of moisture regain, melting point and enhancement affinity to dyeing by different classes of dyestuffs. The important properties improvement include ion exchange capacity, electrical conductivity, antistatic, insect repellent activity antibacterial property. PP containing Ag, Zn, ZnO, TiO 2 , Cu, Cu 2 O nano particles are antibacterial fabrics which are used as wound healing dressings.