It revealed
that the equilibration time for dyeing decreased with the
increase in temperature. Moreover the treated cotton
fibres require a longer equilibration time than the
untreated one. Increasing the temperature slightly
increased the amount of lac dye adsorbed on PEItreated
cotton fibres and largely increased in the case of
BSA-treated cotton fibres, but the opposite effect
occurred on untreated cotton fibres. The temperatureindependence
of adsorption of lac dye on PEI-treated
cotton fibres could be attributed to the characteristic of
modified surface discussed via zeta potential. However,
these results might affect the interaction time of the dye
molecule and the surface of cotton fibres and also
thermodynamics of the adsorption. In addition, the PEItreated
cotton fibres demonstrated the highest amount
of lac dye adsorption with respect to the BSA-treated
and the untreated cotton fibres