Preparation and characterization of thermosensitive magnetic particles

A new method for the preparation of magnetic particles were carried out by linking γ-methylacryloyl oxypropyl trimethoxysilane (KH-570) with magnetic powder after it was hydroxylated and then graft copolymerizing with N-isopropylacrylamide. Thus, thermosensitive magnetic microsphere was produced. Modified magnetic particles were characterized by the method of IR, X-ray photoelectron spectroscopy and transmission electron microscopy. The studies of adsorption and desorption of emulsifiers on modified magnetic particles shows the modified magnetic particles have good thermosensitivity.