Merih Sarıışık

Modifying of Cotton Fabric Surface with Nano-ZnO Multilayer Films by Layer-by-Layer Deposition Method

ZnO nanoparticle–based multilayer nanocomposite films were fabricated on cationized woven cotton fabrics via layer-by-layer molecular self-assembly technique. For cationic surface charge, cotton fabrics were pretreated with 2,3-epoxypropyltrimethylammonium chloride (EP3MAC) by pad-batch method. XPS and SEM were used to examine the deposited nano-ZnO multilayer films on the cotton fabrics. The nano-ZnO films deposited on cotton fabrics exhibited excellent antimicrobial activity against Staphylococcus aureus bacteria. The results also showed that the coated fabrics with nano-ZnO multilayer films enhanced the protection of cotton fabrics from UV radiation. Physical tests (tensile strength of weft and warp yarns, air permeability and whiteness values) were performed on the fabrics before and after the treatment with ZnO nanoparticles to evaluate the effect of layer-by-layer (LbL) process on cotton fabrics properties.

A Comparison Among Performance Characteristics of Various Denim Fading Processes

The aim of this study was to examine the effect of fading methods such as sand-blasting, laser and washing on performance properties of denim products. In this study, on one type of denim fabric, fading methods by laser and sand-blasting were applied in different intensities and pressures, and then fabrics were washed with the aid of different types of washing processes. Also, another denim fabric group was only washed by applying different types of washing processes. At the end of the study, loss of weight, color abrasion and loss of tensile strength of denim fabrics were measured. As a result, fading methods decreased tensile strength and weight values and the decrease rates changed in line with the intensity and the pressure of fading methods. Furthermore, color abrasion values of the fabrics changed due to the intensity and the pressure of fading methods. Back-staining values decreased after laccase enzyme and hypochlorite bleaching, but after other washings, back-staining values increased due to washing type.

The fabrication of nanocomposite thin films with TiO2 nanoparticles by the layer-by-layer deposition method for multifunctional cotton fabrics

A multilayer nanocomposite film composed of anatase TiO(2) nanoparticles was fabricated on cationically modified woven cotton fabrics by the layer-by-layer molecular self-assembly technique. For cationic surface charge, cotton fabrics were pre-treated with 2,3-epoxypropyltrimethylammonium chloride (EP3MAC) by a pad-batch method. Attenuated total reflectance Fourier transform infrared spectroscopy (FTIR), x-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were used to verify the presence of deposited nanolayers. Photocatalytic activities of the nanocomposite films were evaluated through the degradation of red wine pollutant. Nano-TiO(2) deposition enhanced the protection of cotton fabrics against UV radiation in comparison with the untreated cotton fabrics. Air permeability and whiteness value analysis was performed on the fabrics before and after the treatment with TiO(2) nanoparticles by the layer-by-layer deposition method. Tensile strength tests of the warp and weft yarns were performed to evaluate the effect of solution pH value changes during the alternate dipping procedures. For the first time the durability of the effect of the self-assembled multilayer films on the cotton fabric functional properties was analyzed after 10 and 20 washing cycles at 40 degrees C for 30 min.

Design of orthopedic support material containing diclofenac sodium microparticles: preparation and characterization of microparticles and application to orthopedic support material

The aim of this study is preparation and characterization of diclofenac sodium microparticles and their application to the orthopedic support materials. The microparticles were obtained using spray drying method involving ethyl cellulose as shell material. The morphology, particle size, drug loading capacity and in vitro release characteristics of the drug microparticles were optimized for impregnation diclofenac sodium microparticles onto the orthopedic support materials. Scanning electron microscopy (SEM) was used to characterize the drug microparticles and the treated fabrics with microparticles. SEM images illustrated that the microparticles were spherical in shape and also fixed onto the orthopedic support materials. Furthermore, the resistance of materials containing microparticles to washing were also investigated. Finally, in vitro drug release studies of microparticles and textile impregnated with microparticles were done. This study suggested that textile systems containing diclofenac sodium microparticles could have a potential for long-term therapy for rheumatic disorders.

Layer by layer assembly of antibacterial inclusion complexes

Purpose – The purpose of this paper is to create a textile material which shows antibacterial activity with resistance to environmental conditions by using volatile active agent inclusion complex and self-assembly method. Design/methodology/approach – An inclusion complex of carvacrol and β-CD is generated by kneading method and deposited on the cotton fabrics by using a nanofabrication method named as layer-by-layer (LbL) deposition method. Three different concentration of CD and CD:Car aqueous solutions were deposited on cotton fabrics. Attenuated total reflectance Fourier transform infrared spectroscopy (FTIR-ATR), scanning electron microscopy (SEM), antimicrobial efficacy test of fabrics against washing and some physical tests (water vapor permeability, air permeability) were performed on the fabrics before and after the treatment with CD to evaluate the effect of the LbL process on cotton fabric properties. Findings – The results showed that the coated fabrics with CD/CD:Car multilayer films enhanced...

Preparation of naproxen–ethyl cellulose microparticles by spray-drying technique and their application to textile materials

Abstract The objective of this study is to develop a new textile-based drug delivery system containing naproxen (NAP) microparticles and to evaluate the potential of the system as the carrier of NAP for topical delivery. Microparticles were prepared by spray-drying using an aqueous ethyl cellulose dispersion. The drug content and entrapment efficiency, particle size and distribution, particle morphology and in vitro drug release characteristics of microparticles were optimized for the application of microparticles onto the textile fabrics. Microparticles had spherical shape in the range of 10–15 μm and a narrow particle size distribution. NAP encapsulated in microparticles was in the amorphous or partially crystalline nature. Microparticles were tightly fixed onto the textile fabrics. In vitro drug release exhibited biphasic release profile with an initial burst followed by a very slow release. Skin permeation profiles were observed to follow near zero-order release kinetics.

Antifungal Microcapsules of Ethyl Cellulose by Solvent Evaporation and Their Application to Cotton Fabric

In this study two antifungal pharmaceutical agents, terbinafine and ketoconazole, were mi croencapsulated by solvent evaporation. Two types of ethyl cellulose with different viscosity values were used. Microcapsules were evaluated by X-ray diffractometry, DSC, FTIR and SEM analysis. Although the characteristic peaks of ketoconazole appeared in the X-ray diffractometry, those of terbinafine disappeared. The same results were observed for DSC analysis. The melting point of ketoconazole existed, while that of terbinafine was not ob served. The microcapsules had a spherical shape, however the particle size varied between 5 and 120 μm. The microcapsules were applied to 100% cotton fabric. The washing of fabrics was performed in various washing cycles, and afterwards antifungal tests were performed. The fabrics had antifungal properties against Trichophyton rubrum, which causes mycoses, up to 5 washing cycles.

Analysing Releasing Attitude of Micro and Molecular Capsules Containning Orange Oil

In this study, it was aimed to evaluate the release behaviour of microcapsules and β-cyclodextrin molecular capsules that contains orange oil. For this reason, orange oil carrying inclusion complexes and ethyl cellulose microcapsules were produced. As part of characterization studies of microcapsules and inclusion complexes, Fourier Transform-Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM) and Gas chromatography–mass spectrometry (GC-MS) analyses were performed. Microcapsules and inclusion complexes that are in powder form were applied to 100% cotton knitted fabric and washing resistance was investigated. After application of microcapsules and inclusion complexes that produced with orange oil to textile materials, odour release behaviours from fabrics were examined after 5 washing cycles with using microgram precision analytical balance.

Investigation of binding properties of microcapsules on low pressure plasma treated textiles

Microencapsulation is a process to protect vulnerable active agents such as cosmetic products, antimicrobials, flame retardants, insecticides, pharmaceuticals, etc... from external factors by coating with a thin film of shell material. Textile materials are able to carry microcapsules with these various features, thus it is possible to employ microencapsulation as functionalizer in textile industry [1,2]. Nevertheless, microcapsules have to be bonded to textile material in order to protect usage conditions like washing. There are several ways to bond microcapsules onto textile materials: chemically with cross linking or binding with resin based materials. I n t hi s study, it is aimed to improve take up of microcapsules. So that fabrics are treated via low pressure plasma to extend absorbency [3]. In this context, textile fabrics are treated with acrylic acid. Discharge power is determined as 50 to 100 Watt, whereas plasma duration is 10 to 30 minutes. Cosmetic microcapsules are prepared by spray drying technique and applied to cotton fabric by padding method. In order to track release mechanism easily active material is chosen as β-caroten and the active material is covered with ethyl cellulose. The performance qualifications such as encapsulation success, presence of core substance and existence of the capsules on the textile surface are determined by SEM, DSC, FT-IR analyses and particle size measurement. Active agent content and the altered performance features of the fabrics are examined after repeated washing cycles.