In this work, the flower-like CuS was prepared by solvothermal method using CuSO4?5H2O and S. The parameters, such as the mass of PVP, the mole ratio of Cu and S, the reaction time and the temperature, were carefully investigated by using the orthogonal matrix experimental method. Then, polyaniline/CuS composites were synthesized by in-situ polymerization and recombination method. The flower-like CuS was characterized by FT-IR, XRD and SEM. The near infrared absorbing capacity was test by Solid-state Diffuse Reflectance UV-Vis-NIR Spectra. The results indicate that the flower-like CuS with the diameter of 5~8 μm can be obtained under the best conditions for the mole ratio (Cu:S) of 1:2, the reaction temperature of 200 oC, the reaction time of 6 h and the mass of PVP of 0.25 g. The near infrared absorbing capacity of polyaniline/CuS composite adding 30 wt% CuS can achieve 2.1 a.u at 650 nm.
