This Work aimed to use pigments extracted from banana peel as natural waste source to dye some Egyptian cotton fabrics. Alkaline extracted solution using 0.1% NaOH was analyzed by high performance thin layer chromatography (HPTLC), analysis technique. The alkaline solution was applied to the premordated bleached and mercerized cotton fabrics made from Giza 89 and Giza 83 cotton varieties. Ferric chloride, copper sulphate and potassium dichromate were used as mordents. The factors affecting the fixation of the extracted dye with cellulose was studied. The treated and untreated fabrics samples ware tested for their mechanical properties expressed as tensile strength (g/tex) and elongation %. Dyeing performance in terms of color parameters (K/S, L*, a*, b* and ΔE), and fastness properties (wash, perspiration, and light fastness) were studied. The samples show high tensile strength, high color strength, and high fastness properties. These results are very important for industrial application with the production of a natural dye as an inexpensive source from banana peel as a by product. Another objective is to increase the production of eco-textile garments with a good price for the Egyptian customers .

Copper (Cu) nanoparticles have attracted considerable attention because of their applications in many different fields. In this paper, Cu particles have been produced by means of a pulse laser ablation (PLA) process to ablate Cu metallic target submerged in two different mediums, water, and ethanol. The laser ablation process was occurred at energy by 900 and 700 mJ with wavelengths of 532 and 1064 nm. The UV visible spectrum was also characterized to investigate the optical properties. The atomic force microscope (AFM) and scanning electron microscope (SEM) were used to detect the nanoparticles of Cu. The results showed that the Cu nanoparticles could be prepared successfully in ethanol media at both laser energies 900 and 700 mJ for 532 and 1064 nm wavelength. Peak at 575 nm appeared in the U.V visible spectrum which indicates the formation of Cu nanoparticles. Furthermore, there is a slight chance for preparation of Cu nanoparticles in water media owing to the incidence of Cu oxides instead of Cu nanoparticles.

This study examines the effects of enzymatic treatment by acid and neutral cellulases after desizing and washing denim fabric. Tensile strength, elongation, stiffness, crease recovery angles and fastness properties of the samples were measured by standard methods. The chemical changes to the fabric samples were observed using the FTIR (Fourier Transformer Infra Red). Also, the surfaces of the treated samples were observed by the SEM (scanning electro microscope). The results show that all these treatments which gave the samples an age-worn appearance decreased the mechanical properties. Acid cellulase is the most aggressive enzyme for specially treated cloths, which proves that washing followed by applying neutral cellulase enzyme is the most suitable treatment for denim fabric.

A series of MgxZn1-xO thin films were grown on glass substrates using modified chemical bath deposition (m-CBD) called successive ionic layer adsorption and reaction (SILAR) technique. The crystal structure, surface topography and the optical characterization of the prepared films were studied as a function of Mg/Zn (x) content. It is observed that the deposited films have polycrystalline structure in nature and grown in two phases Hexagonal and cubic. The preferential orientation of the films was absorbed along (002) plane. Structural parameter such as crystallite size, number of dislocation density and micro-strain were also investigated. The crystallite size and surface roughness are increased with the increase of Mg2+ ions content. Thus the results showed that the surface topography and the surface quality of the deposited films can be controlled by Mg2+ ions content. The optical transmittance spectra analysis showed that transmittance increase with the increase Mg2+ content to about 85% for x = 0.75, and the energy band gap increases (2.82 - 3.17) eV as the Mg2+ content increases x = (0.25 - 0.75). These results indicate that the MgxZn1-xO thin films can be potentially used in high-performance ultraviolet optoelectronic devices.

No abstract