Inhibitory Effect of β-cyclodextrin on Acid Dye Migration During Laundering
Vol. 54, No. 5, pp. 336-343,
Oct. 2017
10.12772/TSE.2017.54.336
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Abstract
Dyes released from dark-colored nylon fabrics frequently migrate to white or
light-colored nylon fabrics during laundering. To examine the factors to reduce this dye migration, the color difference (ΔE*) of a nylon fabric laundered in a very dilute solution of C.I. Acid Red 336 was compared with that of the control fabric. The effects of the addition of β–cyclodextrin (β-CD) and the variation in the washing conditions during laundering were investigated. The dye in the solution appeared to be included in the β-CD because the absorbance of the dye solution increased with the addition of β-CD. As the concentration of β-CD added to the washing solution containing dilute dye increased, the ΔE* values of the fabric washed in the solution decreased. On the other hand, the ΔE* values of the fabric washed in the linear sodium laurylbenzene sulfonate (LAS) anionic surfactant solution containing very dilute dye was much lower than that washed in the solution without the surfactant. On the addition of sodium carbonate, the ΔE* values of the fabric decreased. The ΔE* values of the nylon fabric washed in the heavy-duty detergent solution containing dilute dye was significantly lower than that of the fabric washed in the light-duty detergent, and the former decreased more as the β-CD concentration was increased.
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