Preparation and properties of graphene oxide reinforced porous magnetic natural rubber
Magnetic rubber has been widely used in military and medical fields because of its excellent properties of magnetic-induced damping and magnetic-induced mechanics.However,the low magnetorheological effect and the contradiction between magnetorheological effect and mechanical properties of magnetic rubber has greatly hindered its engineering application.Therefore,porous magnetic natural rubber(PMR)with GO content of 0 phr,0.5 phr,0.8 phr,1.1 phr and 1.4 phr were prepared by mechanical blending method.The micro-morpholo-gy,magnetic properties,magnetic rheological properties and mechanical properties of PMR were studied sys-tematically.The results show that PMR has a circular closed porous structure,and the matrix elastic modulus of the structure is low,which is conducive to the magnetic particles in the matrix to move along the direction of the magnetic field under the action of the magnetic field,so that PMR has the high magnetorheological effect.With the increase of GO content,the tensile strength of PMR first increases and then decreases.When GO con-tent is 0.8 phr,the hole wall breakage of PMR is the least,the tensile strength is the largest(5.02 MPa)and the magnetorheological effect is higher(422％).Proper amount of GO doping not only improves the pore struc-ture of PMR,but also improves its mechanical properties and plays the role of reinforcing agent.This study provides a new idea for designing and preparing magnetic rubber with high magnetorheological effect and excel-lent mechanical properties.
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