The FTIR spectra of the untreated and plasma treated cotton/nylon samples were taken to determine the chemical changes that could have occurred as a result of a plasma treatment.
The absorption peaks for amine stretching at 3,296 cm−1, amide carbonyl at 1,534 cm−1, and carboxylic acid at 1,634 cm−1 were normalized with respect to that of C–H stretching at 2,932 cm−1.