Synthesis And Property Study Of Polyimides Containing Phthalocyanine-graphene Composite

In this paper, a series of tetra-amino phthalocyanine(MPcNH2) were synthesized through liquid phase method, and the carboxyl-functionalized graphene oxide(GO-COOH) was synthesized through Hummers method, respectively. The GO-MPcNH2was obtained by the amidation of precursors MPcNH2and GO-COOH. And then, rGO-MPcNH2was prepared by the reduction reaction of carboxyl in GO-MPcNH2and hydrazine hydrate. Finally, the polyimide film which contain the rGO-MPcNH2was prepared by the condense reaction of1,4-bis(4-aminophenoxy)benzene(TPE-Q) and rGO-MPcNH2in the presence of3,3’,4,4’-biphenyl dianhydride(BPDA). The samples were characterized by the fourier transfer infrad(FT-IR) spectroscopy, ultraviolet-visible(UV-vis) spectroscopy, X-ray photoelectron spectroscopy(XPS) and scanning electron microscope (SEM).The morphology analysis of the SEM image of GO-COOH revealed that the GO-COOH is uniformed distribution as lamellar structure, and its size is1～3μm.It is clearly seen from the UV-vis spectroscopy of MPCNH2that the characteristic absorption peaks in Q-band blue shifted to some extent after the coordination of In, Ni, Co, Cd, Cu. While the characteristic absorption peaks in Q-band red shifted after the coordination of Pb. The absorption peaks of PI film red shifted in B-band and blue, shifted in Q-band was observed.By YAG pulsed laser system, the third-order nonlinear optical properties of the prepared tetra-amino phthalocyanine and its derivatives were studied by Z-scsn measurements at wavelength of532nm with21ps pulse. The results indicated that these samples showed anti-saturation absorption effect and can be used as excellent optical limiting materials.