Raman spectra were obtained to characterize Sapitinib chemical structure transformations of the fabric composites, as shown in Fig. 3. The spectrum of the raw fabric displayed characteristic peaks assigned to nylon. The peak at 1440 cm−1 represented the CH2 bending region in the C-C backbone. Peaks at 1122 cm−1, 1277 cm−1, 1306 cm−1, 1600 cm−1 and 2898 cm−1 were assigned to the C-C stretching, amide Ⅲ group, CH2 twisting, amide Ⅰgroup and the symmetric C-H stretching, respectively . The GO coated fabric exhibited two prominent broad peaks: D band at 1330 cm−1 and G band at 1590 cm−1, confirming successful coating of GO on the nylon fibres. The intensity ratio of D and G band (ID/IG) increased after chemical reduction (from 1.31 to 1.60), which can be ascribed to the decrease in the average size of the sp2 domains associated with the reduction of GO. As new graphitic domains were created upon reduction, their sizes were smaller than the ones in GO, but the quantity increased . The background peaks of the fabric were weakened after reduction treatment may be explained by that rGO sheets stacked more densely on the fibres after the removal of oxygenated functional groups.