Dyeing of poly(lactic acid) fibres with synthesised novel heterocyclic disazo disperse dyes

Abstract

Poly(lactic acid) (PLA) is the first melt-processable, renewable, sustainable and biodegradable natural-based synthetic fibre. It has a broad range of uses and combines ecological advantages with outstanding performance in textiles. PLA fibre, as an aliphatic polyester, can be dyed with disperse dyes. Apart from the limited number of commercial disperse dyes, disperse dye exhaustion on PLA is generally lower than that on poly(ethylene terephthalate) (PET). In this study, new heterocyclic disazo disperse dyes, substituted with methyl, nitro and chloro groups at their ortho-, metaand para-positions, synthesised in our previous study, were applied to PLA and PET fibres to examine their dyeing performance, and colour fastness and dye exhaustion properties. Different shades of yellow, orange, reddish brown and brown were obtained. Most of the synthesised novel heterocyclic disazo disperse dyes exhibited good build-up properties with high K/S levels on both fibres. Para-bonding substituent provided higher K/S values than meta-and ortho-positions for-NO 2 and-Cl substituents for both fibres. Overall, the most synthesised novel heterocyclic disazo disperse dyes in this study exhibited good build-up properties with high K/S, exhaustion and wet fastness levels on both PLA and PET fibres. How to cite this article: Avinc O, Bakan E, Demirçalı A, Gedik G, Karcı F. Dyeing of poly(lactic acid) fibres with synthesised novel heterocyclic disazo disperse dyes.

Investigation of novel indoline azo disperse dyes: synthesis, DFT simulation, and dyeing performance on PET and PA fabrics

“…4,5 Azo disperse dyes bearing heterocyclic moieties exhibited excellent properties compared with those of traditional azo disperse dyes. 6,7 Pyridinone and pyrazolone derivatives are the most widely used coupling componentcontaining heterocyclic disperse dyes. [8][9][10] The colored fabrics are more vivid and have a higher color fastness, which is used to replace the dyeing of anthraquinone disperse dyes.…”