Thermodynamic i nvestigation of aci d green ۲ ۵ and cationic alky l ammoniu m bromid surfactants with different alkyl chain lengt h

The interactions between dy e and surf actant molecules are important in various dyeing processes such as textile dy eing, photography a nd printing ink as well asin chemical researches such as biochemistry, analytical chemistry and photosensiti zation [۱]. Various parameters (the charge and the alkyl tail length of the surfactants an d the type and the positio n of the substituents in the aro matic ring of the d ye molecules) can affect the interactions betwe en surfactan t and dye molecules. The pu rpose ofthis study was to in vestigate the interactions of c ationic surfactants; tetradec yltrimethylammonium bromide (TTAB), hexadecyltrimethylam monium bromide (CTAB) with anionic dye; Ac id Green ۲۵ (AG) by conductometric method. The infl uence of temper ature and su rfactant structure (the effect of alkyl chain l ength of surfactant) on ion pair formation is obser ved with th is method.

کلیدواژه ها:

Condu ctometry ، Anionic dye ، Cationic surfactant ، Thermodynamics