mehrnaz gharagozlou - department of nanotechnology institute for color science and technology
saeideh gorji kandi - department of color imaging and image processing

In this work effect of components ratios varied in the range of 10-70% wt.on the reflectance and colorimetric properties of nanocomposites included nickel based pigments as catalysts has been investigated . The studies carried out using X-ray diffraction XRD colorimetric analysis L&a*b color parameters and diffuse reflectance spectrophotometry techniques. reflectance spectra wer related to color using establiched internation conventions according to the commission internationale d'Eclairage CIE method. the matrix network of the nanocomposites has provided an ideal nucleation environment to uniformly disperse nanoparticles and thus to confine them to aggregate and coarsen which showed great effects on the crystallite sizes , reflectance and colorimetric properties of the nickel based pigment nanocomposites. particle sizes of the samples increased with the component ratio. diffraction patterns confirmes the formation of a pure organic free single phase nickel based pigment with a cubic system. our results showes that changing the component ratio in the wynthesized nanocomposites caused a color difference between about 1.6 to 5.8 CIELAB units.

nanocomposites, pigments , reflectance and colorimetric properties.