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An investigation into the reaction of bifunctional reactive dye at various pH levels
Author(s) -
Uygur Ayse,
Hall Michael
Publication year - 1996
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1996.tb01810.x
Subject(s) - bifunctional , dyeing , chemistry , reactive dye , cellulose , acid dye , polymer chemistry , organic chemistry , catalysis
The bifunctional reactive dye Sumifix Supra Blue BRF, which has two different reactive groups (sulphatoethylsulphone and monochlorotriazine), was stored for 1 h at various pH before dyeing. Corresponding experiments were carried out with individual sulphatoethylsulphone and monochlorotriazine reactive dyes. The pH values of the solutions were set firstly by using free inorganic acid or base at 20d̀C and secondly by using various buffer solutions at 20d̀C and 60d̀C. The bifunctional dye always had relatively less unfixed dye than the corresponding monofunctional dyes at the various pH values examined. It is suggested that with this type of bifunctional reactive dyes on dyeing cellulose the sulphatoethylsulphone has the greater role to play in dye fixation.