Abstract

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An extracted vanillin from Foster Clark vanilla flavour for the chemical substitution of toxic carriers used in aqueous dyeing of polyester fabrics was assessed. The extracted vanillin was used to compare the dyeing of a woven polyester fabric with two commercial dyes C.I Disperse Yellow 56, and C.I. Disperse Yellow 50. The vanillin carrier is used for dyeing at 3 % shade at boil, the dye uptakes increased for both C,I Disperse Yellow 56 and C.I Foron Yellow 50 , while higher at 0.15 g of vanillin at pH 4 gave 70.4 % exhaustion on C.I Foron Yellow 50 and least on C.I Disperse Yellow 56 gave 0.66 % at pH 11. The wash, heat pressing and light fastness was determined, an excellent wash fastness was observed at both ISO 2 and ISO 3 wash fastness respectively, given an excellent rating at 4-5. More so, the light fastness test gives a high fastness rating at an average of 6-7 for both the two commercial dyes at different pH and concentration used. The study confirms that vanillin can be used as a chemical substitute to conventional carriers using the aforementioned dyes and gave good wash and light fastness properties

Keywords: Vanillin, Polyester, Dyeing, Light Fastness, Wash Fastness