Red mud/polydimethylsiloxane(PDMS)composites were prepared by filling red mud in flexible PDMS by mechanical stirring,vacuum magnetic stirring defoamination and heating curing.The structure,microstructure,mechanical and thermal properties of the composites were characterized and analyzed.The results show that:Red mud as a cross-linked node and self-lubricating particle improves the elastic modulus,tensile strength,hardness Shore,impact strength and friction and wear properties of the composites,among which the impact strength increases significantly from 41.13 kJ·m-2 to 273.33 kJ·m-2,an increase of 565%.In addition,red mud as a non-combustible also improves the flame retardant performance of the composites,the limiting oxygen index increases from 25.7%to 34.7%,an increase of 35%,into the range of refractory materials(>27%).This is expected to expand the application field of this silicone material,and provide a reference for the resource utilization of red mud and the research of new red mud/polymer composites.
red mudred mud utilizationpaddingcompositessiliconepolydimethylsilox
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