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Effect of plasma treatment and grafting of β-cyclodextrin on color properties of wool fabric dyed with Shrimp shell extract

The aim of this study was to evaluate the effect of low temperature plasma (LTP) treatment and grafting of beta-cyclodextrin (β-CD) on dyeing and fastness properties of wool fabrics using natural dye extracted from shrimp shell. Aluminum sulfate, iron sulfate, tin chloride, copper sulfate, and sodium dichromate were used as mordant and the dyeing of samples was conducted after the pre-mordanting process. Scanning electron microscopy and Fourier transform infrared spectroscopy (FTIR) were used to study the morphological and chemical changes of the fibers. Also, the antimicrobial properties of fabrics were quantitatively evaluated against Staphylococcus aureus according to AATCC 100-1993 test method. The results showed using of sodium dichromate as mordant could be attained to green shade after dyeing fabrics. The color difference and color strength of samples were improved by increasing the sodium dichromate concentration and β-CD in the after-treatment process. FTIR analysis indicated a significant increase in the absorption peak of hydroxyl group after grafting of β-CD on LTP-treated samples. Antimicrobial results of samples indicated that LTP-treated fabric demonstrated no antimicrobial behavior, while the dyed and β-CD-grafted sample possessed significant reduction in the number of bacteria. Moreover, the β-CD-treated samples showed very good to excellent light and washing fastness properties.