Application of polyamidoamine dendrimers in polyamide fibres modification to increase their dyeability

In this paper, polyamidoamine dendrimer of zero, first and second generation were synthesized via divergent method using ethylendiamine and methyl acrylate as starting materials and their application in modification of polyamide fibres to increase their dye ability were evaluated. For this purpose, the synthesized dendrimers were reacted with cyanuric chloride (2,4,6-trichlorotriazine) and obtained compounds introduced to the polyamide fibres structure through covalent bonds. These interpretations lead to increase the number of amino groups of these fibres. To confirm this, the modified polyamides were dyed with C.I acid orange 2 as a monosulphonic anionic dye in various concentrations. The results obtained from spectroscopic data of dyeing wastewaters and dyed fabrics indicate that the dye ability of modified fabric with second generation was improved more than 20 times. Furthermore, the major determinant of dye exhaustion appeared to be associated with the modification reaction condition and the generation of used dendrimers, not the dye concentration in dyeing process.