Facile preparation approach of nanocomposite based on water-soluble polymer and layered double hydroxides for the enhancement of leather dyeing

Abstract LDH/P(DMDAAC-AA-SAS) nanocomposites with LDH loading of 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0% have been prepared by facile approach using water-soluble polymer dimethyl diallyl ammonium chloride-acrylic acid-sodium allyl sulfonate [P(DMDAAC-AA-SAS)] and layered double hydroxides (LDH) through ultrasound and self-assembly process. X-ray diffraction (XRD) and transmission electron microscope (TEM) of the nanocomposites show that the LDH are partly exfoliated, and the solubility of the LDH/P(DMDAAC-AA-SAS) can be affected by the LDH loading amount. Fourier transform infrared spectrometer (FTIR) analysis indicates that the nanocomposites are prepared. Different LDH loading amount LDH/P(DMDAAC-AA-SAS) nanocomposites have been applied in leather process. The results show that, the ‘L’ values of the 1 wt% LDH loading LDH/P(DMDAAC-AA-SAS) nanocomposite treated black leather can be reduced to 21.56 while the control leather is 25.22, which indicating the better dyeing properties of LDH/P(DMDAAC-AA-SAS) nanocomposite. In addition, 1 wt% LDH loading LDH/P(DMDAAC-AA-SAS) nanocomposite resulted in increment of leather thickening rate by 27.4% than control leather and physical characteristics of leather treated by nanocomposite can also be improved.