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Surface Modifications Of Pet Fabrics With Low Pressure Plasma

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In this study we demonstrate the feasibility of dyeing polyester with reactive dye after treatment with an argon plasma discharge. The dyeing with reactive dyes was made possible through the introduction of hydroxyl groups on a polyester fabric after treatment with low-pressure argon plasma. Additionally, a preliminary study on the effects of plasma treatment with air over polyester is presented. The objective of this project was to modify the surface of a polyester fabric in order to improve the dyeing process. As a consequence of hydrophobicity, polyester fibers are dyed exclusively with disperse dyes. This class of dyes requires the use of temperatures up to 130[DEGREE]C. The research presented here addresses this limitation of the polyester dyeing process by creating a cotton-like surface over the polyester fabric. Our goal was to replace disperse dyes with reactive dyes in the polyester dyeing process. The advantage of the reactive dye process is that it is carried out at ambient temperatures. The analytical techniques used to evaluate the results were X-ray photoelectron spectroscopy (XPS) to estimate the presence of new reactive groups in the polymer structure, atomic force microscopy (AFM), and cold-field scanning electron microscopy (FSEM) to assess topographical modifications. Our final step was to visually prove the presence of hydroxyl groups in the fiber structure. We were able to dye the treated polyester fabrics with reactive dyes. The dyeing of plasma-treated and untreated polyester exhibited significant differences under color analysis with a spectrophotometer, with differences greater than 1, which, according to the normative ISO 105-J03:1995, means that the colors cannot be considered the same.

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2010-10-20

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dissertation or thesis

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