Preparation and Magnetic Properties of Polyimide/Nickel Titanate Nanocomposite

Abstract

Polyimide/nickel titanate composite were successfully prepared through wet-chemistry synthesis method, using nickel titanate nanopowder and poly(amic acid). Pyrometallic dianhydride, 4,4-oxydianiline and N,N-dimethyl acetamide were used to prepare polyimide. In this method Fourier taransform infrared spectrometry, X-ray diffraction and scanning electron microscopy vibrating sample magnetometer were used to characterize the structure process, the particle size, morphology and the magnetic properties. The results indicated that polyimide/nickel titanate nanocomposite with particle size between 20 and 45 nm could be obtained after calcinations of the dried gel at 300 ºC for 1 h. The synthesized composites indicate a superparamagnetic behaviour, as observed by vibrating sample magnetometer at room temperature.