XRD and FTIR data of zeolite, modified zeolite, chitosan, pickled hides, and pickled hides after tanning.

The test conditions were as follows: Cu Kα radiation, tube voltage 40 kV, tube current 40mA, graphite monochromator, scan speed 4°/min, and scan angle 5° – 90°.

Dried collagen samples were obtained from pickled collagen, HAc-ZA-TL, and CSHAc-ZA-TL were obtained. Cross-sections of the leather samples were cut using a scalpel and analyzed using a Spectrum100 Fourier Transform Infrared Spectrometer. Spectra were acquired in the 500 – 4000 cm⁻¹wavelength range with 32 scans per sample at a scan frequency of 4 cm⁻¹.