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Linear alkylbenzene sulfonates in the prevention of vagrant dye pick‐up on polyester textile fabric during laundering
Author(s) -
Lannert K. P.,
Crutchfield M. M.
Publication year - 1982
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02582188
Subject(s) - polyester , linear alkylbenzene , alkyl , pulmonary surfactant , degradation (telecommunications) , scavenger , sulfonate , micelle , dodecylbenzene , textile , critical micelle concentration , chemistry , materials science , chemical engineering , organic chemistry , composite material , sodium , radical , aqueous solution , telecommunications , biochemistry , computer science , engineering
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 9 , C 11 , C 13 and C 15 single homolog alkyl chain lengths, and with several mixed chain length blends are presented.