Mehmet Orhan

Improving the Antibacterial Property of Polyethylene Terephthalate by Cold Plasma Treatment

Many studies suggest strong hydrophilicity of plasma treated polyester surfaces. However, no studies have been reported on the influence of plasma on the antibacterial activity of polyethylene terephthalate. First samples were padded with triclosan as antibacterial agent with different concentrations. Second samples were treated by oxygen plasma with different operating frequency and treating time, respectively. Afterwards, plasma treated samples were padded with triclosan in same conditions. The results revealed that the antibacterial activity slighlty increased after treating with triclosan. SEM images and FTIR spectra showed that horizontal channels were brought about on the fiber surface and then better surface roughness and wettability were obtained by plasma. Fibers were fully coated with triclosan after plasma and the antibacterial activity increased with increasing operating frequency and reaction time. Finally, the samples treated with triclosan after plasma gave acceptable results and showed the best antibacterial activity for Staphylococcus aureus and Escherichia coli.

Performing the Electrospraying Process for the Application of Textile Nano Finishing Particles

We have performed the electrospraying process via a conventional configuration for the application of nanoparticles, used for water and oil repellency of textile fabrics, onto the surface of the textile to avoid undesirable agglomeration of those particles. This approach shows by means of scanning electron microscopy (SEM) images that such an application (electrospraying) would avoid agglomeration by using the electrostatic forces produced and gave acceptable oil repellency, which also points to commercial market interest.

Obtaining medical textiles including microcapsules of the ozonated vegetable oils

In this paper, it was aimed to obtain disposable medical textiles having antibacterial and wound healing properties, as well as biological adaption. For this purpose, the St. John’s Wort oil and flax seed oil were ozonated, and the oils were capsulated with arabic gum. The produced ozonated oils were characterized through FTIR and TGA analyses, as well as the properties of antibacterial, wound healing, and biological adaption were investigated. The produced microcapsules were examined via optical microscope and FTIR. The characterized microcapsules of the ozonated oils were applied to the textiles with padding method. After the applications, the fabrics were researched with SEM and FTIR analyses; in addition the antibacterial and wound healing properties and biological adaption of the textiles were also investigated. The results showed that the St. John’s Wort oil and flax seed oil were successfully ozonated and microcapsulated. The microcapsules of the oils could be applied to the fabric samples with the determined application recipe. The ozonated oils and the fabric samples applied microcapsules of the ozonated oils gained high antibacterial and wound healing property. In addition, the fabric samples were produced as having biological adaptation.

Development of Silver-Based Bactericidal Composite Nanofibers by Airbrushing

In this article, we report a simple, cost-effective and eco-friendly method of airbrushing for the fabrication of antibacterial composite nanofibers using Nylon-6 and silver chloride (AgCl). The Nylon-6 is a widely used polymer for various biomedical applications because of its excellent biocompatibility and mechanical properties. Similarly, silver has also been known for their antibacterial, antifungal, antiviral, and anti-inflammatory properties. In order to enhance the antibacterial functionality of the Nylon-6, composite nanofibers in combination with AgCl have been fabricated using airbrush method. The chemical functional groups and morphological studies of the airbrushed Nylon-6/AgCl composite nanofibers were carried out by FTIR and SEM, respectively. The antibacterial activity of airbrushed Nylon-6/AgCl composite nanofibers was evaluated using Gram +ve (Staphylococcus aureus) and Gram -ve (Escherichia coli) bacterial strains. The results showed that the airbrushed Nylon-6/AgCl composite nanofibers have better antibacterial activity against the tested bacterial strains than the airbrushed Nylon-6 nanofibers. Therefore, the airbrushed Nylon-6/AgCl composite nanofibers could be used as a potential antibacterial scaffolding system for tissue engineering and regenerative medicine.

Tekstil Yüzeylerine Antibakteriyel Aktivite Kazandırmak için OzonlanmıŞ Bitkisel Yağ Mikrokapsüllerinin Aktarılacağı En Uygun Aplikasyon Reçetesinin Belirlenmesi

Bu makale, tekstil yuzeylerine antibakteriyel aktivite kazandirilmak icin ozonlanmis bitkisel yag mikrokapsullerinin aktarilacagi en uygun aplikasyon recetesini belirlemeyi amaclamistir. Bu amacla zeytin yagi 3 saat ozonlanmis ve ozonlanmis yag GC ve FTIR analizleri ile karakterize edilmistir, ayni zamanda yagin antibakteriyel ozelligi arastirilmistir. Karakterizasyon sonrasi ozonlanmis yag, basit koaservasyon yontemi ile Arap zamki icine enkapsule edilmistir. Hazirlanan mikrokapsuller optik mikroskop ve FTIR analizleri ile karakterize edilmistir. Son olarak, tekstil yuzeylerine antibakteriyel aktivite kazandiracak optimum aplikasyon recetesinin belirlenebilmesi amaciyla, farkli aplikasyon cozeltileri hazirlanmis ve hazirlanan cozeltiler pamuklu kumaslara emdirme yontemi ile aplike edilmistir. Aplikasyon sonrasi kumaslarin SEM goruntuleri incelenmis ve E.coli bakterisine karsi antibakteriyel etkinligi ASTM E 2149 01 standardina gore kantitatif olarak degerlendirilmistir. Sonuclar, ozonun zeytinyagindaki cift baglarla kolaylikla reaksiyona girebildigini ve yagin antibakteriyel aktivitesini gelistirdigini gostermistir. Ozonlanmis yag basit koaservasyon yontemi ile basarili bir sekilde kapsullenebilmistir. Ayrica, ozonlanmis bitkisel yag mikrokapsulleri icin optimum aplikasyon recetesi belirlenebilmistir.