ABSTRACT
Abstract-In this work an efficient way of dip-coating of textile materials with magnetic nanoparticles is presented. Two ferrofluid samples of iron oxide for coating of polyester filaments were used. One sample was AdNano MagSilica (Degussa), consisting of γ-Fe2O3 (maghemite), Fe3O4 (magnetite) and small amounts of α-Fe2O3 (hematite) nanoparticles 5-20 nm in size. The second sample was synthesized by precipitation from solution which yielded particle sizes of 5-12 nm. In order to prevent the formation of aggregates or agglomerates during the preparation, the particles were stabilised by embedding them in a polysiloxane matrix. Finally the coating of textiles with the nanoparticles was carried out by dip-coating. After heating at 130°C for 3h the textile materials showed superparamagnetic behaviour. Possible sensor and memory applications are briefly discussed.
