PET fiber has an intrinsic low hydrophilic character and an inactive surface which make it
uncomfortable for wearing purpose. Moreover, it is difficult to colour polyester fabric other
than disperse dyes. Therefore, surface modification of PET is very important to improve its
absorbency and bring the possibility to dye polyester with anionic dyes by altering its surface
characteristics. This research was focused on surface modification of polyester using chicken
feather which involves serine as the most abundant amino acid with hydroxyl groups. The
treated polyester fabric using 20ml/L concentration of chicken feather extract showed
improved water drop absorbency from 45 into 3 seconds and the reactive dye uptake by 36
folds from 0.15 to 5.37 K/S values
