Matrize polimerikodun konposite magnetikoen sorrera

Abstract

Composites are materials that are currently widely used and have two (or more) materials with different properties. Namely, they consist of a matrix and a dispersed material, an additive or filler. The use of these materials can be found from reinforced concrete in buildings to plastic glazing of surfboards. This means that composite materials can be found almost everywhere, and they are no exception in the field of current technology development research. In these studies it has been mostly investigated in polymeric matrix composites because the properties offered by the polymeric matrix lead to a very wide range of applications. Among these polymeric matrixes, the use of polyurethanes is increasingly being promoted due to their elastic properties and their ease of creation, without much impact on nature. Along with this, the development of current polyurethanes has greatly increased, thanks to their many variability and applications. On the other hand, it is very interesting to scatter magnetic particles in composites in response to magnetic stimuli and to develop intelligent materials. The properties of the magnetic particles are determined by the form, size and by the treatments they have undergone in order to be formed and according to this they can be of different nature: paramagnetic, ferromagnetic, ferromagnetic, diamagnetic or antiferromagnetic. In this work, film appearance composites have been created and analysed, in which the cobalt ferrites (CoFe₂O₄) ferromagnetic particles have been dispersed in the polyurethane matrix. Tensile testing, Differential Scanning Calorimetry (DSC) and Vibrational Sample Magnetometry (VSM) techniques were used to characterize the materials. The composites obtained will be able to transform their surface under the influence of a magnetic field stimulus. Therefore, the use of these composites can be extended to clean energy extraction, microchips, computer or diving suits.