Rıza Atav

Investigation of the dyeing characteristics of alpaca fibers (Huacaya and Suri) in comparison with wool

Luxury fibers have great importance in the field of high added value fabric production, but the studies related to these fibers are very limited. One of these luxury proteinous fibers is alpaca wool. In this study, dyeing characteristics (dye-uptake speed, color efficiency and nuance of color, fastness properties, etc.) of alpaca fibers (Huacaya and Suri) were investigated by taking sheep wool as a reference. Furthermore, analysis such as scanning electron microscopy, energy dispersive X-ray and Fourier-transform infrared spectroscopy was also carried out. According to the experimental results it was found that both dye-uptake speed and amount was in the range of sheep > Suri alpaca > Huacaya alpaca for milling acid dye. Furthermore, when their fastness properties were compared with sheep wool, it could be said that there was no difference for washing and perspiration fastness, while rubbing and light fastness of alpaca fibers were lower than sheep wool.

Determination of the Most Commonly Recognized and Used Keratin Based Luxury Fibers

There is a group of animal fibers known as “luxury fibers.” These are mohair, cashmere, camel hair, lama, alpaca, vicuna, guanaco, angora, yak, and quivit. In this study, the effects of demographical variables such as gender, education, age, sector, and income on the recognition and usage of luxury fibers in Thrace Region of Turkey were investigated. In order to analyze the obtained data, crosstabulation and chi-square statistical methods are used. According to the experimental results it can be said that the most commonly known and used luxury fibers are cashmere, mohair, and angora. The most important (37.6%) reason for participants to use luxury fibers is their warm feeling. On the other hand the most important (approx. 30%) reason for participants not to use them is that they do not have sufficient information about these fibers. It was determined that the most commonly (37.8%) used textile product made of luxury fibers is outerwear. Furthermore, it was found out that approximately 75% of participants accept paying more for garment containing luxury fibers because of their high quality.

Synthesis of Silver Mono- and Di-Carboxylates and Investigation of their Usage Possibility in Textiles as an Antibacterial Agent

The study aims to examine the antibacterial efficiency of cotton fabrics loaded with silver cyclo hexane mono or di carboxylates (silver naphthenates). After the synthesis of silver naphthenates, their chemical structures were analysed with spectrophotometric methods (IR and NMR). Then the usage possibility of Ag naphthenates as an antibacterial agent in the finishing of cotton fabrics was investigated. Their antimicrobial activity against three gram-negative (Escherichia coli, Klebsiella pneumonia, Pseudomonas aeruginosa) and three gram-positive (Staphylococcus aureus, Bacillus subtilis, Enterococcus faecalis) bacteria were studied. The stability of the antibacterial effect after repeated washings (1-5-10-20) was also tested.

Determination of the relationship between fiber characteristics and felting tendency of luxury fibers from various origins

When literature is reviewed in detail, it can be seen that there is limited research, especially on Angora rabbit fiber and again in none of the research was the felting propensity of luxury protein fibers from different origins (goat, camelid and rabbit) related with fiber properties, such as cuticle scale frequency and scale height. For this purpose, hair-based luxury fibers, which are most widely used and consumed all over the world (cashmere, mohair, angora, Huacaya alpaca and Suri alpaca) were chosen in order to measure fiber diameter, fiber length, cuticle scale frequency and scale height of these fibers. As a result, detailed relations about the felting propensity of the hair-based luxury fibers with the fiber properties were investigated. According to the experimental analysis, it was determined that angora, which is the finest and the shortest animal fiber, showed the lowest felting propensity. On the other hand, Suri alpaca fiber with a low scale height gave the highest feltability due to being the longest among the investigated fibers.

Ultrasonic Assisted Dyeing of Angora Fi̇bre

In this study it was aimed to determine the effect of ultrasound usage on the colour yield in dyeing angora fibres, and it was found that dyeing in the presence of ultrasound energy increases the dye-uptake of angora fibres, hence higher colour yield values were obtained. According to experimental results, it can be said that at all points the colour yield values were higher in the presence of ultrasound than in its absence . The difference between them was greater for darker shades and for dyeing carried out in an acidic medium (pH 5), and also for moderate dyeing periods (90 min.). Furthermore there is no important difference between washing fastness, alkali solubility and strength values of fibres dyed in the presence and absence of ultrasound.

The effect of using alpaca and silk instead of wool in weft yarns on the woollen fabric properties

ABSTRACT In this study, the effect of using silk or alpaca weft yarns on fabric properties and dyeing behavior in the production of woollen woven fabrics was investigated. Therefore, three different fabric types with two different weft densities were produced, and the mass per unit area, tensile strength, comfort properties, such as air permeability and water vapor permeability have been tested. The fabrics were then dyed with reactive dyestuffs recommended for wool, and the color (color yield (K/S) and CIEL*a*b*) and fastness (washing and light) properties of the fabrics after dyeing were compared. The results of the permeability measurements showed that based on the fiber type used to produce woven fabrics affected these properties. However, the most attractive result was obtained in the dyeing of silk containing woollen fabrics. It was observed that in case of weaving fabrics according to various designs using wool and silk in weft and warp yarns separately, two different tones can be obtained on the same fabric, that is, a bicolor effect.