Dye–surfactant interaction in aqueous solutions

Dye–surfactant interaction in aqueous solutions
Ma1gorzata Bielska, Anna Sobczyn´ ska, Krystyna Prochaska*
Institute of Chemical Technology and Engineering, Poznan University of Technology, Pl. M. Sklodowskiej-Curie 2, 60-965 Poznan, Poland

a r t i c l e i n f o

Article history:

Received 28 February 2008
Received in revised form 30 May 2008
Accepted 30 May 2008
Available online 7 June 2008

Keywords:
Dye–surfactant interaction
Ionic surfactants
Anionic dyes
Cationic dyes

a b s t r a c t
The interaction of four ionic dyes, C.I. Mordant Black 11, C.I. Mordant Black 17, C.I. Direct Yellow 50 and C.I.
Basic Blue 9, with cationic and anionic surfactants was studied by absorption spectroscopy. The dyes
interact strongly with oppositely charged surfactant in the premicellar concentration range and the
appropriate values of constant of dye–surfactant complex formation were estimated. In addition, the
most important factor affecting the number of dye particles solubilized in the surfactant micelle was its
molecular mass.
2008 Elsevier Ltd. All rights reserve

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