THE UTILIZATION OF POLYDOPAMINE INTERLAYER TO ADD SILVER NANOPARTICLES (AGNPS) TO PET FABRICS

Silver nanoparticles are structures used in many areas such as antibacterial materials, increasing conductivity, and wastewater treatment, etc. In recent years, demand for their use in textile products has been increasing. Starting from this point, this study aimed to produce silver nanoparticles on the surface of PET fabric in order to meet the different properties expected from silver. For this purpose, polydopamine coating was applied on PET fabric by in situ polymerization. Then, fabric structures containing polydopamine and silver nanoparticles were obtained with a reduction reaction of three different molarity silver nitrate salts. The after washing condition of the fabric with the highest produced amount of silver nanoparticles was examined. Spectrophotometric color measurement, FT-IR, SEM and EDX techniques were performed. The best results were obtained on the fabric where silver nitrate was applied at 50 mM. The amount of silver nanoparticles in this fabric was measured as 1.35% after washing.

*** Click here to download this article ***

Read More

Investigation of the oxidative self polymerization of dopamine under alkaline conditions on wool fabrics

Most studies about polydopamine in the textile field have been related to cotton fibers. There are not many studies about the use of polydopamine on wool fibers. A limited number of studies have focused on the coloring of wool, whereas wool is the fiber with the highest variety of intermolecular attraction forces among all natural and man-made fibers. 

Polydopamine contains high amounts of catechol and amine functional groups due to its structure. In this study, different from the literature, oxidative self polymerization of dopamine was achieved on wool fabric for different periods of time, and the coated fabrics were examined with characterization tests and spectrophotometrically. 

In this study, lower values were obtained than lightness (L*) values reported for other fibers in previous studies, and it was concluded that the wool-PDA interaction is superior to other fibers. Scanning electron microscopy and energy dispersive X-ray spectroscopy results showed that the polymerization and nano-coating formed successfully and continued to remain on the surface after washing. 

The lowest lightness value was obtained in the 32 h coating. However, the lowest color change after washing was in the 16 h coating (0.44%). This result showed that the coating was completed within 16–32 hours and there was only accumulation on the surface in the later times.

*** Click here to download this article ***

Read More