Preparation Of New Type Material Which Drived By Magnetism And Actuators Develop

Magnetic polymer materials are made by inorganic magnetic materials and polymer. It can combine magnetic and elastic property of polymer together; can rapidly and controllable change shape along with the outside magnetic stimulation. When the stimulation is released, magnetic polymer materials can restore to the original shape, by smooth movement and without noise. It belongs to the flexible medium and non-contact style materials. Magnetic polymer material is new intelligent materials. Which can be used in intelligent bionic toys, new medical equipment and rehabilitation devices, Wearable Robot, actuators drived by magnetic, sensors, etc. Magnetic polymer materials have been regarded as one of the most hotspot researches of functional materials.In this paper, we study the content as follows:1. This paper preparat the nano Fe₃O₄ magnetic particle of magnetic composite membrane by the chemical coprecipitating method and combine the preparation of method physics (ultrasound and mechanical agitation) and chemical (citric acid root coupling agent) scatter. That solve the difficulty of compatibility of metal and polymer and make them easy to reunion in the matrix.Such as the changes of nanoparticles'parameters of composition, performance, technological conditions can significantly influence the performance of the composite film. In order to control characteristics of nano magnetic composite membrane, using mixed levels orthogonal table to arrangement orthogonal test, using the susceptibility of product as measure gauge, analysing result by extreme difference analysis, getting the optimum technological conditions of preparation of magnetic nanoparticles.Nano Fe₃O₄ is determined crystal size and crystal size by X-ray diffraction; observed conglomeration and granular size by transmission electron microscope, get magnetization curve by vibrating specimen magnetometer; analysis saturation magnetization of magnetization curve. Show the size of sample has reached nanometer particle size, dispersity of sample is far better than analytical reagent Fe₃O₄, sample has fine magnetic performance.In the paper further studying the affect on preparation and performance of nano Fe₃O₄ by add citrate. Found salt of citric acid can hinder oxidation of Fe₃O₄, get nano Fe₃O₄ which grain diameter is smaller.2. Study preparation methods of nano magnetic composite membrane which come off by itself and waterproof nano Fe₃O₄/PVA magnetic composite membrane, and study on modification through choose different plasticizer and additive amount on nano magnetic composite membrane.Study the effect of different proportion and different preparation process of the preparation of nano magnetic composite membrane material through infrared spectrum, thermal analysis, the test of magnetization Performance. Found the surface of magnetic Fe₃O₄/PVA nano composite membrane is smoother than the surface of Fe₃O₄/PVA magnetic composite membrane, surface is also affected by Fe₃O₄ content. Study characteristics influence of the nano magnetic composite membrane's deformation through the research of membrane's thickness, the way to dry, magnetic field intensity, plasticizer content. Get the membrane's formula which magnetic susceptibility is the highest through the susceptibility test.In order to overcome the shortcoming of Fe₃O₄/PVA magnetic composite membrane's waterproofness, study the preparation method of Fe₃O₄/PVDF magnetic composite membrane. Found the surface of Fe₃O₄/PVDF magnetic composite membrane is smoother than Fe₃O₄/PVA nano magnetic composite membrane through transmission electron microscope, modulus of elasticity of Fe₃O₄/PVDF magnetic composite membrane is more small than magnetic Fe₃O₄/PVA nano composite membrane which is added plasticizer through mechanics performance testing, elongation of Fe₃O₄/PVDF magnetic composite membrane is larger than Fe₃O₄/PVA nano magnetic composite membrane which is added plasticizer. Deformation performance and magnetic susceptibility of Fe₃O₄/PVDF magnetic composite membrane is smaller than Fe₃O₄/PVA magnetic composite membrane which add no plasticizer. Fe₃O₄/PVDF magnetic composite membrane's performance in general is no better than that of adding plasticizer.3. Develop executive device and control circuit of actuators drived by magnetic field which is made by nano magnetic composite membrane base on the geometric parameter design and magnetic field analysis.Establish finite element model of the actuators by using ANSYS parametric design language, analysis magnetic field distribution of the actuators drived by magnetic field. Get the performance parameters of the actuators and optimized its structural parameters. Verify the applicability of the dynamic characteristics model of the actuators through prototype based on kinematic and dynamic real-time simulation of 3-D virtual prototype of the actuators.