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Sorption Isotherms and Thermodynamics of Direct Dye onto the Nano Poly(amidoamine) Dendrimer Treated Jute Yarn



In this study, the poly(amidoamine) (PAMAM) G-2 dendrimer was applied to the
jute yarn.



Untreated and dendrimer treated jute yarns were then dyed with Direct Yellow 24. Thermodynamic
parameters of dyed samples, free energy (ΔG°), the enthalpy (ΔH°), and the entropy (ΔS°) were also
evaluated.



Dendrimer treated jute yarn showed higher dye sorption compare to untreated jute yarn. The
values of ΔH° and ΔG° indicated that the sorption process was exothermic and spontaneous at low temperature.



 Freundlich isotherm was found to be the optimum isotherm for untreated and BET isotherm
defined for dendrimer treated jute yarn.
