Linear alkylbenzene sulfonates in the prevention of vagrant dye pick-up on polyester textile fabric during laundering.

Autor: Lannert, K., Crutchfield, M.
Zdroj: Journal of the American Oil Chemists' Society (JAOCS); May1982, Vol. 59 Issue 5, p252-255, 4p
Abstrakt: The unwanted pick-up of low levels of vagrant dyes during washing of textile fabrics can be a significant contributor to long-term polyester appearance degradation. Fabric appearance loss from pick-up of small quantities of a standard yellow dye are measured on both optically brightened and unbrightened polyester. Linear alkylbenzene sulfonate (LAS) surfactant micelles act as effective dye scavengers, reducing the level of dye pick-up by the fabric substantially. The efficacy of LAS as a dye scavenger is quantified as a function of alkyl chain length and use concentration. Dye scavenging ability per unit weight of LAS increases with increasing molecular weight and decreasing critical micelle concentration (cmc). Dye scavenging of up to 80% of the transferable dye is achieved at high LAS concentrations. Results with C, C, C and C single homolog alkyl chain lengths, and with several mixed chain length blends are presented. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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