Gökhan Erkan

The Mechanical Properties of γ-Methacryloxypropyltrimethoxy silane-treated Jute/Polyester Composites:

In this study, jute/polyester composites were fabricated. To improve the adhesion between jute fabric and polyester alkali-treated jute fabrics were treated with γ-methacryloxypropyltrimethoxysilane (γ-MPS). The effect of silane concentrations (0.1%, 0.3%, and 0.5%) on tensile properties, flexural properties, and interlaminar shear strength was investigated. Once jute fabrics were treated with 0.1% and 0.3% silane concentrations, the tensile properties of silane-treated jute polyester composites increased. However, when 0.5% γ-MPS was used in silane treatment, the tensile properties of jute/polyester composites decreased. 0.3% silane-treated jute/polyester composites exhibited superior improvements in terms of the flexure properties among the fabricated composites. Interlaminar shear strength measurements showed that best adhesion was provided by using 0.3% silane-treated jute/polyester composites. Good adhesion between silane-treated jute fabric and polyester was also confirmed by scanning electron microscope observations.

Enhancing The Thermal Properties of Textiles With Phase Change Materials

Phase change materials have been a main topic in research for the last 20 years. They have also been used in many engineering applications, especially in the fields of thermal storage and insulation. They are used for ice storage, building applications, in the field of solar energy storage, heat pumps, heat distribution systems, air conditioning, green houses, solar collectors and cookers, for improving thermal comfort in vehicles, and for the conservation and transport of temperature-sensitive materials such as electronic materials, food, the transport of medical tissue, and engines or hydraulic machines. Recently, PCMs (Phase Change Materials) have entered the textile market for use in increasing the thermal comfort of garments. In such extreme applications of textiles as diving suits, ski wear, and underwear, PCMs can impart outstanding properties to garments. Their insulating properties may prevent the wearer from fatal consequences. In this paper, the use of PCMs, methods of evaluation, and methods a...

Dyeing Properties and Analysis by Rp-Hplc-Dad of Silk Fabrics Dyed with Madder (Rubia tinctorum L.)

Madder (Rubia tinctorum L.) has been used for dyeing textiles since the Stone Age. Common madder produces pigments in its roots, such as alizarin, pseudopurpurin, purpurin, munjistin, rubiadin, xanthopurpurin, purpuroxanthin, lucidin, chinizarin, christofin, and antrhagallol. Madder gives a unique red colour to textiles. The aim of this study is to understand the effect of different mordant concentration on silk dyeing by using madder extract. Degummed and bleached, woven silk fabric was used. Alum [KAl(SO4)2.12H2O] was used as mordant. All reagents were analytical grade. Silk fabrics were scoured by soap (35% w/w) at 90°C for 1.5 hours. Liquor ratio was 100:1. Dyeing was performed at 65°C, 100% owf, for 2 hours. Mordanting procedure was achieved at different mordant ratio, for 2 hours, at 65°C. All color measurements were performed using Minolta 3600D spectrophotometer (D65 illuminant, specular included, 10° observer angle). Colour fastness to washing, light, perspiration and rubbing was performed according to ISO 105 C06, ISO 105 B02, ISO 105 E04 and ISO 105 X12 respectively. Each dyed silk fabrics were analysed RP-HPLC-DAD. Semi-quantities of colouring compounds were determined in the dyed silk fabrics, depending on the amounts of mordant metal.

In-vivo and in-vitro tick repellent properties of cotton fabric:

N,N-diethyl-m-toluamide (DEET) and eucalyptol were encapsulated by β-cyclodextrin (β-CD) using the kneading method at four different molar ratios. The products were applied to 100% cotton fabric through the impregnation method. Fourier transform infrared and differential scanning calorimetry analysis results confirmed that the inclusion complex occurred between β-CD and repellent agents at mole ratios of 1:3 and 1:2 for eucalyptol and DEET, respectively. The experiments carried out on Hyalomma marginatum showed that DEET and eucalyptol treated fabrics repel, inhibit and kill blood-feeding Hyalomma marginatum ticks in-vivo and in-vitro for a period of at least 48 and 72 hours under laboratory conditions. In-vitro essay showed good repellent activities for both DEET and eucalyptol. The results show that eucalyptol has more repellent effect than DEET. In the case of the in-vivo essay, a single washing cycle of eucalyptol: β-CD-treated fabric showed repellent activity.

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...

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.

Effects of Liposome Assisted Dyeing on PET Fabric Properties

Liposome technology is applied in numerous fields, such as pharmaceuticals, cosmetics, foods, detergents, textiles and other applications, because of the ability to liberate the encapsulate slowly. Application of this technology’s result is the energy saving by reducing time and temperature which should be higher in conventional wool-dyeing method and avoiding the use of any other synthetic auxiliaries. In this study, the effect of liposome, which is constituted from soya lecithin and cholesterol, on dispersion dyeing of PET fabric was investigated. Thin lipid layer method was performed for the liposome production. On the other hand the effect of the commercial liposome was also investigated. PET fabrics were dyed using different dispersion dyes and color measurement values, tensile strength, light, rubbing, washing and perspiration fastness analyses were carried out. Fastness results were evaluated according to ANOVA statistical analysis. Different temperatures (between 115°C-130°C) were compared by performing color dyeing yields to examine the effect of liposome addition to the temperature in the dying process. The results were showing that PET fabrics which were dyed with liposome had better fastness, color strength values as compared with non-liposome dyed fabrics. In addition, the energy saving by reducing temperature was obtained.

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.

Yünlü Kumaşların Kebrako Ekstresi Kullanılarak Basılması

Bu calismada dogal boyarmadde olarak Kebrako agacinin ekstresi kullanilmistir. Yunlu kumaslar; bakir (II) sulfat, gumus nitrat, potasyum bikromat, nikel (II) sulfat, demir (II) sulfat, aluminyum potasyum sulfat metal tuzlari ile on ve sonradan mordanlama olmak uzere iki farkli yonteme gore mordanlanmislardir. Guar ve Arap zamki kullanilarak baski islemi gerceklesmistir. Baskili orneklerin kolorimetrik ve renk verimi degerleri ve haslik ozellikleri incelenmistir. En yuksek K/S degeri gumus nitrat mordan maddesi ile sonradan mordanlama isleminde elde edilmistir. Arap zamkinin baski patina ilavesi renk ozellikleri acisindan olumlu etki saglamistir.