The combination of atmospheric plasma and chemical treatments for antibacterial finish on cotton

The aim of this study was to investigate the incorporation of triclosan based chemical into cyclodextrin based commercial product, bonded onto cotton fabric with and without plasma modification. The treated samples were characterized by SEM analysis. The antibacterial activities of the washed and unwashed samples were evaluated according to the AATCC Test Method 147-1998 and some physical properties were also investigated. It was observed that after the combination process of triclosan, cyclodextrin and atmospheric plasma modification, cotton fabric was able to retain its antibacterial activity up to the 5 washing cycles at 60°C

Thermogravimetric, microscopic and mechanical analyses of pbt and pet yarns

In this study, thermogravimetric, microscopic and mechanical properties of different types of polyester yarns were investigated and compared. To this goal, PET based regular polyester yarn and polyester yarns modified for various specialities (flame-retardant, UV protective and antibacterial) and PBT yarn were selected. According to the results, it was determined that PBT had a lower Tdi value, higher char residue, lower tensile strength compared to regular PET and similar surface characteristics to regular PET. Among the modification processes, only the flame retardancy process was found to affect the thermal property

Shareholders' tendency of being customer of firms in which they own share: An empirical research

Stock Exchange is an important financial instrument to provide long term financial needs of firms. In general, firms take into consideration of being traded in stock exchanges from only financial point of view. Besides there are marketing effects of this financial tool which firms overlooked like gaining and keeping customers because of investor's tendency of being customer of firm in which they own share, increasing firm image and publicity. Under the framework of the study, shareholder's this tendency and factors which affect this condition is tried to be examined by information obtained by face to face survey forms and findings are interpreted. By these results, possible contributions of being traded in stock exchanges are specified as; increasing and keeping customers by proving the shareholders' tendency of being customer and lower costly firm image making activities. These results may increase the firms' tendency of going public and so contributes not only improving the stock exchanges but also generating competitive advantage for firms. © EuroJournals Publishing, Inc. 2012

An ecological approach for the surface modification of aramid fibers

Since aramid fibers have very high crystallization degree and high chemical inertness, the surface modification is needed to enhance the adhesion between fibers and matrix for the usage of composite applications. In the present study, para-aramid fibers were treated by atmospheric pressure plasma under various plasma powers to improve interfacial adhesion between aramid fiber and epoxy resin. The surface morphologies of untreated and treated fibers were investigated by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. Composite interfacial adhesion properties were determined by interlaminar shear strength (ILSS) using a short-beam bending test. Results indicated that argon plasma treatment was an effective method for improving interfacial adhesion between fiber and matrix with ecological treatment

Effects of enzymatic treatments on surface morphology and chemical structure of linen fabrics

In previous studies; effects of enzymatic treatments on linen fabrics have been mostly investigated in terms of wettability, sorption properties, whiteness-yellowness index, and K/S values after dyeing. However, surface chemistry and topography of enzyme-treated linen fabrics have not been reported enough. The aim of this work was to examine the effect of pectinase treatments on surface structure and chemical properties of greige linen fabrics by using instrumental techniques. After enzymatic treatment, adequate removal of noncellulosic impurities from the fiber surface has been proved by AFM images and O 1/C 1 ratio of the treated surface. Water drop test measurement and absorbance spectrographs of FTIR analysis have supported the results. It was observed that achievement in bioscouring is familiar to conventional alkaline scouring. Copyright © 2011 Wiley Periodicals, Inc

Liquidambar orientalis mill. Leaf aqueous extract for the synthesis of silver nanoparticles and immobilization on textile fabrics for biomedical applications

Biosynthesis of silver nanoparticles (AgNPs) are often applied to textiles for their strong antimicrobial activity and have potential use in various application. In this paper, a study has been performed to identify the bioreduction of silver nitrate (AgNO3) by the leaf of Liquidambar orientalis Mill. plant in Turkey and its application on cotton (Co) and cotton/polyester (Co/PES) fabrics. Characterization of silver AgNPs was made by using UV-visible spectroscopy, Fourier Transform Infrared (FTIR) spectrums and Transmission Electron Microscope (TEM) images while Scanning Electron Microcopy (SEM) was used to characterize the surface of textile fabrics. The inhibition zones were studied by using Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumoniae bacteria to determine antimicrobial activity of both AgNPs and AgNPs loaded fabrics. The UV-Vis spectra gave surface plasmon resonance at 450 nm for synthesized AgNPs and nanoparticle synthesis was completed within 1 min. In vitro antimicrobial activities against gram (+) (Staphylococcus aureus) and gram (-) (Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae) bacteria of AgNPs and AgNP immobilized cotton and cotton/PES fabrics were demonstrated. SEM images of treated fabrics indicated silver nanoparticles were well dispersed on the surfaces of specimens

The combination of atmospheric plasma and chemical treatments for antibacterial finish on cotton

The aim of this study was to investigate the incorporation of triclosan based chemical into cyclodextrin based commercial product, bonded onto cotton fabric with and without plasma modification. The treated samples were characterized by SEM analysis. The antibacterial activities of the washed and unwashed samples were evaluated according to the AATCC Test Method 147-1998 and some physical properties were also investigated. It was observed that after the combination process of triclosan, cyclodextrin and atmospheric plasma modification, cotton fabric was able to retain its antibacterial activity up to the 5 washing cycles at 60°C