Ali A. Zolriasatein* Pages 673 - 681 ( 9 )
Background: In this study, the poly(amidoamine) (PAMAM) G-2 dendrimer was applied to the jute yarn.
Methods: 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.
Results: 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.
Conclusion: Freundlich isotherm was found to be the optimum isotherm for untreated and BET isotherm defined for dendrimer treated jute yarn.
Isotherm, thermodynamics, dyeing, direct dye, dendrimer, jute.
Department of Textile Engineering, College of Technical and Engineering, Yadegar-e-Imam Khomeini (RAH), Shahrerey Branch, Islamic Azad University, Tehran